__init__.py000064400000017175147207507420006700 0ustar00# # Package analogous to 'threading.py' but using processes # # multiprocessing/__init__.py # # This package is intended to duplicate the functionality (and much of # the API) of threading.py but uses processes instead of threads. A # subpackage 'multiprocessing.dummy' has the same API but is a simple # wrapper for 'threading'. # # Try calling `multiprocessing.doc.main()` to read the html # documentation in a webbrowser. # # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __version__ = '0.70a1' __all__ = [ 'Process', 'current_process', 'active_children', 'freeze_support', 'Manager', 'Pipe', 'cpu_count', 'log_to_stderr', 'get_logger', 'allow_connection_pickling', 'BufferTooShort', 'TimeoutError', 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Condition', 'Event', 'Queue', 'JoinableQueue', 'Pool', 'Value', 'Array', 'RawValue', 'RawArray', 'SUBDEBUG', 'SUBWARNING', ] __author__ = 'R. Oudkerk (r.m.oudkerk@gmail.com)' # # Imports # import os import sys from multiprocessing.process import Process, current_process, active_children from multiprocessing.util import SUBDEBUG, SUBWARNING # # Exceptions # class ProcessError(Exception): pass class BufferTooShort(ProcessError): pass class TimeoutError(ProcessError): pass class AuthenticationError(ProcessError): pass # This is down here because _multiprocessing uses BufferTooShort import _multiprocessing # # Definitions not depending on native semaphores # def Manager(): ''' Returns a manager associated with a running server process The managers methods such as `Lock()`, `Condition()` and `Queue()` can be used to create shared objects. ''' from multiprocessing.managers import SyncManager m = SyncManager() m.start() return m def Pipe(duplex=True): ''' Returns two connection object connected by a pipe ''' from multiprocessing.connection import Pipe return Pipe(duplex) def cpu_count(): ''' Returns the number of CPUs in the system ''' if sys.platform == 'win32': try: num = int(os.environ['NUMBER_OF_PROCESSORS']) except (ValueError, KeyError): num = 0 elif 'bsd' in sys.platform or sys.platform == 'darwin': comm = '/sbin/sysctl -n hw.ncpu' if sys.platform == 'darwin': comm = '/usr' + comm try: with os.popen(comm) as p: num = int(p.read()) except ValueError: num = 0 else: try: num = os.sysconf('SC_NPROCESSORS_ONLN') except (ValueError, OSError, AttributeError): num = 0 if num >= 1: return num else: raise NotImplementedError('cannot determine number of cpus') def freeze_support(): ''' Check whether this is a fake forked process in a frozen executable. If so then run code specified by commandline and exit. ''' if sys.platform == 'win32' and getattr(sys, 'frozen', False): from multiprocessing.forking import freeze_support freeze_support() def get_logger(): ''' Return package logger -- if it does not already exist then it is created ''' from multiprocessing.util import get_logger return get_logger() def log_to_stderr(level=None): ''' Turn on logging and add a handler which prints to stderr ''' from multiprocessing.util import log_to_stderr return log_to_stderr(level) def allow_connection_pickling(): ''' Install support for sending connections and sockets between processes ''' from multiprocessing import reduction # # Definitions depending on native semaphores # def Lock(): ''' Returns a non-recursive lock object ''' from multiprocessing.synchronize import Lock return Lock() def RLock(): ''' Returns a recursive lock object ''' from multiprocessing.synchronize import RLock return RLock() def Condition(lock=None): ''' Returns a condition object ''' from multiprocessing.synchronize import Condition return Condition(lock) def Semaphore(value=1): ''' Returns a semaphore object ''' from multiprocessing.synchronize import Semaphore return Semaphore(value) def BoundedSemaphore(value=1): ''' Returns a bounded semaphore object ''' from multiprocessing.synchronize import BoundedSemaphore return BoundedSemaphore(value) def Event(): ''' Returns an event object ''' from multiprocessing.synchronize import Event return Event() def Queue(maxsize=0): ''' Returns a queue object ''' from multiprocessing.queues import Queue return Queue(maxsize) def JoinableQueue(maxsize=0): ''' Returns a queue object ''' from multiprocessing.queues import JoinableQueue return JoinableQueue(maxsize) def Pool(processes=None, initializer=None, initargs=(), maxtasksperchild=None): ''' Returns a process pool object ''' from multiprocessing.pool import Pool return Pool(processes, initializer, initargs, maxtasksperchild) def RawValue(typecode_or_type, *args): ''' Returns a shared object ''' from multiprocessing.sharedctypes import RawValue return RawValue(typecode_or_type, *args) def RawArray(typecode_or_type, size_or_initializer): ''' Returns a shared array ''' from multiprocessing.sharedctypes import RawArray return RawArray(typecode_or_type, size_or_initializer) def Value(typecode_or_type, *args, **kwds): ''' Returns a synchronized shared object ''' from multiprocessing.sharedctypes import Value return Value(typecode_or_type, *args, **kwds) def Array(typecode_or_type, size_or_initializer, **kwds): ''' Returns a synchronized shared array ''' from multiprocessing.sharedctypes import Array return Array(typecode_or_type, size_or_initializer, **kwds) # # # if sys.platform == 'win32': def set_executable(executable): ''' Sets the path to a python.exe or pythonw.exe binary used to run child processes on Windows instead of sys.executable. Useful for people embedding Python. ''' from multiprocessing.forking import set_executable set_executable(executable) __all__ += ['set_executable'] connection.pyc000064400000034547147207507420007445 0ustar00 rfc@sdddgZddlZddlZddlZddlZddlZddlZddlZddlZddl m Z m Z ddl m Z mZmZmZddlmZmZdZd Zd ZejZd Zd gZeed rd Zed g7Znejd kr4dZedg7ZnedZdZdZdZ de!fdYZ"dddZ$ejd kre%dZ&nddlm'Z'e%dZ&de!fdYZ(dZ)ejd kr de!fdYZ*dZ+ndZ,dZ-d Z.d!Z/d"Z0d#Z1d$Z2d%e!fd&YZ3d'Z4d(Z5d)e"fd*YZ6d+Z7dS(,tClienttListenertPipeiN(tcurrent_processtAuthenticationError(t get_temp_dirtFinalizet sub_debugtdebug(t duplicatetclosei g4@tsha256tAF_INETtAF_UNIXtwin32tAF_PIPEcCstj|S(N(ttime(ttimeout((s2/usr/lib64/python2.7/multiprocessing/connection.pyt _init_timeoutMscCstj|kS(N(R(tt((s2/usr/lib64/python2.7/multiprocessing/connection.pyt_check_timeoutPscCsw|dkrd S|dkr5tjdddtS|dkrgtjdd tjtjfStd d S( s? 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A base for proxies of shared objects cCs;tjjzPtjj|jd}|dkr\tjt f}|tj|jRVRuRRRRR1RSRR (RR>R}((s0/usr/lib64/python2.7/multiprocessing/managers.pyt_connects  c Cs5y|jj}Wn@tk rRtjdtjj|j|jj}nX|j |j |||f|j \}}|dkr|S|dkr"|\}}|j j |jd} | ||jd|j d|jd|} |j|jd|j}t|d d|jf| St||d S( sW Try to call a method of the referrent and return a copy of the result s#thread %r does not own a connections#RETURNs#PROXYiRRPRRLN(RR RvR RtRVRuR>RR(RR)RRRRRRRR1RSRR*( RR,R-R.R}R/R0RRRR((s0/usr/lib64/python2.7/multiprocessing/managers.pyt _callmethods*      cCs |jdS(s9 Get a copy of the value of the referent s #GETVALUE(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyt _getvaluesc Cs|j|jjd|j}t|dd|jftjd|jj |j j |j|j or|j j }tj|tjd|j|j||j|j |jfdd|_dS(NRPRKs INCREF %rR-Ri (RRRRR1RSRR RtRRtaddRRRRt_decrefRt_close(RR}R!((s0/usr/lib64/python2.7/multiprocessing/managers.pyR s cCs|j|j|dks.|jtjkryEtjd|j||jd|}t |dd|jfWqt k r}tjd|qXntjd|j| rt |drtjdt j j|jj|`ndS(Ns DECREF %rRPRLs... decref failed %ss%DECREF %r -- manager already shutdownR s-thread %r has no more proxies so closing conn(tdiscardRRSRRRR RtRR1RnR:RVRuR>R Ri(RRPR!ttlstidsetRR}Rs((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs  cCsBd|_y|jWn$tk r=}tjd|nXdS(Nsincref failed: %s(RSRRRnR R(RRs((s0/usr/lib64/python2.7/multiprocessing/managers.pyR6s  cCsi}tjr"|j|ds  cCs |jS(N(R(Rtmemo((s0/usr/lib64/python2.7/multiprocessing/managers.pyt __deepcopy__KscCs*dt|j|jjdt|fS(Ns<%s object, typeid %r at %s>s0x%x(RwR$RRR(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyR#NscCs8y|jdSWn tk r3t|d dSXdS(sV Return representation of the referent (or a fall-back if that fails) R#is; '__str__()' failed>N(RRnR|(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyR6Rs N((R$R%R&RR tForkAwareThreadLockRRSRdRRRRRRRRRRR#R6(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs %      cCsttdd}|r?|j|jkr?|j|jdS|jdtodttdt }|||d||SdS(s Function used for unpickling proxy objects. If possible the shared object is returned, or otherwise a proxy for it. R^iRKt _inheritingN( R9RRSRRTRtpopRdR(R?RRZR.RRK((s0/usr/lib64/python2.7/multiprocessing/managers.pyR_s cBse|}y|||fSWnek r1nXi}x |D]}d||f|Uq?We|ef|}||_||||f<|S(sC Return an proxy type whose methods are given by `exposed` sLdef %s(self, *args, **kwds): return self._callmethod(%r, args, kwds)(RRRwRR(R>Rt_cachetdictmetht ProxyType((s0/usr/lib64/python2.7/multiprocessing/managers.pyt MakeProxyTypets    c Cst|d}|dkr\||jd|}zt|dd|f}Wd|jXn|dkr|dk r|j}n|dkrtj}ntd|j |}|||d|d|d|} t | _ | S(s* Return an auto-proxy for `token` iRPRGNs AutoProxy[%s]RRK( RQRSRR1RiRRRPRRRdR( RRZRRPRRKRR}RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs     t NamespacecBseZdZdZRS(cKs|jj|dS(N(Rtupdate(RR.((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCss|jj}g}x=|D]5\}}|jds|jd||fqqW|jdtjd|S(NRAs%s=%rs Namespace(%s)s, (RRt startswithR;RR5R(RRR=R>R((s0/usr/lib64/python2.7/multiprocessing/managers.pyR#s (R$R%RR#(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs tValuecBs>eZedZdZdZdZeeeZRS(cCs||_||_dS(N(t _typecodet_value(RRRtlock((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs cCs|jS(N(R (R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRxscCs ||_dS(N(R (RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs dt|j|j|jfS(Ns %s(%r, %r)(RwR$R R (R((s0/usr/lib64/python2.7/multiprocessing/managers.pyR#s( R$R%RdRRxRR#RR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyR s     cCstj||S(N(R(RtsequenceR ((s0/usr/lib64/python2.7/multiprocessing/managers.pytArrayst IteratorProxycBsDeZd ZdZdZdZdZd Zd ZRS( t__next__tnextR(tthrowRicCs|S(N((R((s0/usr/lib64/python2.7/multiprocessing/managers.pyt__iter__scGs|jd|S(NR(R(RR-((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscGs|jd|S(NR(R(RR-((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscGs|jd|S(NR((R(RR-((s0/usr/lib64/python2.7/multiprocessing/managers.pyR(scGs|jd|S(NR(R(RR-((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscGs|jd|S(NRi(R(RR-((s0/usr/lib64/python2.7/multiprocessing/managers.pyRis(s__next__snextssendsthrowsclose( R$R%RRRRR(RRi(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs     t AcquirerProxycBs5eZdZedZdZdZdZRS(RRcCs|jd|fS(NR(R(Rtblocking((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(RRRR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs(sacquiresrelease(R$R%RRdRRRR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs    tConditionProxycBs,eZdZd dZdZdZRS( RRtwaittnotifyt notify_allcCs|jd|fS(NR(R(RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs(sacquiresreleaseswaitsnotifys notify_allN(R$R%RRSRRR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs  t EventProxycBs5eZdZdZdZdZd dZRS( tis_setRRRcCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs |jdS(NR(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCs|jd|fS(NR(R(RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs(sis_setssetsclearswaitN(R$R%RRRRRSR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs    tNamespaceProxycBs)eZdZdZdZdZRS(t__getattribute__t __setattr__t __delattr__cCsB|ddkr tj||Stj|d}|d|fS(NiRARR(tobjectR(RRt callmethod((s0/usr/lib64/python2.7/multiprocessing/managers.pyt __getattr__scCsH|ddkr#tj|||Stj|d}|d||fS(NiRARR(R!RR(RRRR"((s0/usr/lib64/python2.7/multiprocessing/managers.pyRscCsB|ddkr tj||Stj|d}|d|fS(NiRARR (R!R R(RRR"((s0/usr/lib64/python2.7/multiprocessing/managers.pyR s(s__getattribute__s __setattr__s __delattr__(R$R%RR#RR (((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs  t ValueProxycBs/eZdZdZdZeeeZRS(RxRcCs |jdS(NRx(R(R((s0/usr/lib64/python2.7/multiprocessing/managers.pyRx scCs|jd|fS(NR(R(RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyRs(sgetsset(R$R%RRxRRR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyR$ s  t BaseListProxyt__add__t __contains__t __delitem__t __delslice__t __getitem__t __getslice__t__len__t__mul__t __reversed__t__rmul__t __setitem__t __setslice__R;tcounttextendtindextinsertRtremovetreverseRt__imul__t ListProxycBseZdZdZRS(cCs|jd|f|S(NR3(R(RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyt__iadd__scCs|jd|f|S(NR8(R(RR((s0/usr/lib64/python2.7/multiprocessing/managers.pyR8s(R$R%R:R8(((s0/usr/lib64/python2.7/multiprocessing/managers.pyR9s t DictProxyRRRxthas_keytpopitemt setdefaultRt ArrayProxyt PoolProxytapplyt apply_asyncRitimaptimap_unorderedRtmapt map_asyncRt AsyncResulttIteratorcBseZdZRS(s( Subclass of `BaseManager` which supports a number of shared object types. The types registered are those intended for the synchronization of threads, plus `dict`, `list` and `Namespace`. The `multiprocessing.Manager()` function creates started instances of this class. (R$R%R&(((s0/usr/lib64/python2.7/multiprocessing/managers.pyR?s tQueuet JoinableQueuetEventtLockRWt SemaphoretBoundedSemaphoret ConditionRRtdictRRR(Ut__all__tosR{tweakrefRVRRIRRtmultiprocessingRRRRR R tmultiprocessing.processR tmultiprocessing.forkingR R RRtmultiprocessing.utilRRtcPickleRt ImportErrorRRRR>RwR9t view_typesR!RR1R*RnR2R@RBRCRR[R\t XmlListenert XmlClientRQRRRRRRRSRdRRR RRRRRRR$R%R9R;R?R@RRRKRLRWRMRNRORRPR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyt$s      ."  4  ,                 reduction.py000064400000014666147207507420007137 0ustar00# # Module to allow connection and socket objects to be transferred # between processes # # multiprocessing/reduction.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [] import os import sys import socket import threading import _multiprocessing from multiprocessing import current_process from multiprocessing.forking import Popen, duplicate, close, ForkingPickler from multiprocessing.util import register_after_fork, debug, sub_debug from multiprocessing.connection import Client, Listener # # # if not(sys.platform == 'win32' or hasattr(_multiprocessing, 'recvfd')): raise ImportError('pickling of connections not supported') # # Platform specific definitions # if sys.platform == 'win32': import _subprocess from _multiprocessing import win32 def send_handle(conn, handle, destination_pid): process_handle = win32.OpenProcess( win32.PROCESS_ALL_ACCESS, False, destination_pid ) try: new_handle = duplicate(handle, process_handle) conn.send(new_handle) finally: close(process_handle) def recv_handle(conn): return conn.recv() else: def send_handle(conn, handle, destination_pid): _multiprocessing.sendfd(conn.fileno(), handle) def recv_handle(conn): return _multiprocessing.recvfd(conn.fileno()) # # Support for a per-process server thread which caches pickled handles # _cache = set() def _reset(obj): global _lock, _listener, _cache for h in _cache: close(h) _cache.clear() _lock = threading.Lock() _listener = None _reset(None) register_after_fork(_reset, _reset) def _get_listener(): global _listener if _listener is None: _lock.acquire() try: if _listener is None: debug('starting listener and thread for sending handles') _listener = Listener(authkey=current_process().authkey) t = threading.Thread(target=_serve) t.daemon = True t.start() finally: _lock.release() return _listener def _serve(): from .util import is_exiting, sub_warning while 1: try: conn = _listener.accept() handle_wanted, destination_pid = conn.recv() _cache.remove(handle_wanted) send_handle(conn, handle_wanted, destination_pid) close(handle_wanted) conn.close() except: if not is_exiting(): import traceback sub_warning( 'thread for sharing handles raised exception :\n' + '-'*79 + '\n' + traceback.format_exc() + '-'*79 ) # # Functions to be used for pickling/unpickling objects with handles # def reduce_handle(handle): if Popen.thread_is_spawning(): return (None, Popen.duplicate_for_child(handle), True) dup_handle = duplicate(handle) _cache.add(dup_handle) sub_debug('reducing handle %d', handle) return (_get_listener().address, dup_handle, False) def rebuild_handle(pickled_data): address, handle, inherited = pickled_data if inherited: return handle sub_debug('rebuilding handle %d', handle) conn = Client(address, authkey=current_process().authkey) conn.send((handle, os.getpid())) new_handle = recv_handle(conn) conn.close() return new_handle # # Register `_multiprocessing.Connection` with `ForkingPickler` # def reduce_connection(conn): rh = reduce_handle(conn.fileno()) return rebuild_connection, (rh, conn.readable, conn.writable) def rebuild_connection(reduced_handle, readable, writable): handle = rebuild_handle(reduced_handle) return _multiprocessing.Connection( handle, readable=readable, writable=writable ) ForkingPickler.register(_multiprocessing.Connection, reduce_connection) # # Register `socket.socket` with `ForkingPickler` # def fromfd(fd, family, type_, proto=0): s = socket.fromfd(fd, family, type_, proto) if s.__class__ is not socket.socket: s = socket.socket(_sock=s) return s def reduce_socket(s): reduced_handle = reduce_handle(s.fileno()) return rebuild_socket, (reduced_handle, s.family, s.type, s.proto) def rebuild_socket(reduced_handle, family, type_, proto): fd = rebuild_handle(reduced_handle) _sock = fromfd(fd, family, type_, proto) close(fd) return _sock ForkingPickler.register(socket.socket, reduce_socket) # # Register `_multiprocessing.PipeConnection` with `ForkingPickler` # if sys.platform == 'win32': def reduce_pipe_connection(conn): rh = reduce_handle(conn.fileno()) return rebuild_pipe_connection, (rh, conn.readable, conn.writable) def rebuild_pipe_connection(reduced_handle, readable, writable): handle = rebuild_handle(reduced_handle) return _multiprocessing.PipeConnection( handle, readable=readable, writable=writable ) ForkingPickler.register(_multiprocessing.PipeConnection, reduce_pipe_connection) managers.py000064400000107352147207507420006733 0ustar00# # Module providing the `SyncManager` class for dealing # with shared objects # # multiprocessing/managers.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [ 'BaseManager', 'SyncManager', 'BaseProxy', 'Token' ] # # Imports # import os import sys import weakref import threading import array import Queue from traceback import format_exc from multiprocessing import Process, current_process, active_children, Pool, util, connection from multiprocessing.process import AuthenticationString from multiprocessing.forking import exit, Popen, assert_spawning, ForkingPickler from multiprocessing.util import Finalize, info try: from cPickle import PicklingError except ImportError: from pickle import PicklingError # # Register some things for pickling # def reduce_array(a): return array.array, (a.typecode, a.tostring()) ForkingPickler.register(array.array, reduce_array) view_types = [type(getattr({}, name)()) for name in ('items','keys','values')] # # Type for identifying shared objects # class Token(object): ''' Type to uniquely indentify a shared object ''' __slots__ = ('typeid', 'address', 'id') def __init__(self, typeid, address, id): (self.typeid, self.address, self.id) = (typeid, address, id) def __getstate__(self): return (self.typeid, self.address, self.id) def __setstate__(self, state): (self.typeid, self.address, self.id) = state def __repr__(self): return 'Token(typeid=%r, address=%r, id=%r)' % \ (self.typeid, self.address, self.id) # # Function for communication with a manager's server process # def dispatch(c, id, methodname, args=(), kwds={}): ''' Send a message to manager using connection `c` and return response ''' c.send((id, methodname, args, kwds)) kind, result = c.recv() if kind == '#RETURN': return result raise convert_to_error(kind, result) def convert_to_error(kind, result): if kind == '#ERROR': return result elif kind == '#TRACEBACK': assert type(result) is str return RemoteError(result) elif kind == '#UNSERIALIZABLE': assert type(result) is str return RemoteError('Unserializable message: %s\n' % result) else: return ValueError('Unrecognized message type') class RemoteError(Exception): def __str__(self): return ('\n' + '-'*75 + '\n' + str(self.args[0]) + '-'*75) # # Functions for finding the method names of an object # def all_methods(obj): ''' Return a list of names of methods of `obj` ''' temp = [] for name in dir(obj): func = getattr(obj, name) if hasattr(func, '__call__'): temp.append(name) return temp def public_methods(obj): ''' Return a list of names of methods of `obj` which do not start with '_' ''' return [name for name in all_methods(obj) if name[0] != '_'] # # Server which is run in a process controlled by a manager # class Server(object): ''' Server class which runs in a process controlled by a manager object ''' public = ['shutdown', 'create', 'accept_connection', 'get_methods', 'debug_info', 'number_of_objects', 'dummy', 'incref', 'decref'] def __init__(self, registry, address, authkey, serializer): assert isinstance(authkey, bytes) self.registry = registry self.authkey = AuthenticationString(authkey) Listener, Client = listener_client[serializer] # do authentication later self.listener = Listener(address=address, backlog=16) self.address = self.listener.address self.id_to_obj = {'0': (None, ())} self.id_to_refcount = {} self.mutex = threading.RLock() self.stop = 0 def serve_forever(self): ''' Run the server forever ''' current_process()._manager_server = self try: try: while 1: try: c = self.listener.accept() except (OSError, IOError): continue t = threading.Thread(target=self.handle_request, args=(c,)) t.daemon = True t.start() except (KeyboardInterrupt, SystemExit): pass finally: self.stop = 999 self.listener.close() def handle_request(self, c): ''' Handle a new connection ''' funcname = result = request = None try: connection.deliver_challenge(c, self.authkey) connection.answer_challenge(c, self.authkey) request = c.recv() ignore, funcname, args, kwds = request assert funcname in self.public, '%r unrecognized' % funcname func = getattr(self, funcname) except Exception: msg = ('#TRACEBACK', format_exc()) else: try: result = func(c, *args, **kwds) except Exception: msg = ('#TRACEBACK', format_exc()) else: msg = ('#RETURN', result) try: c.send(msg) except Exception, e: try: c.send(('#TRACEBACK', format_exc())) except Exception: pass util.info('Failure to send message: %r', msg) util.info(' ... request was %r', request) util.info(' ... exception was %r', e) c.close() def serve_client(self, conn): ''' Handle requests from the proxies in a particular process/thread ''' util.debug('starting server thread to service %r', threading.current_thread().name) recv = conn.recv send = conn.send id_to_obj = self.id_to_obj while not self.stop: try: methodname = obj = None request = recv() ident, methodname, args, kwds = request obj, exposed, gettypeid = id_to_obj[ident] if methodname not in exposed: raise AttributeError( 'method %r of %r object is not in exposed=%r' % (methodname, type(obj), exposed) ) function = getattr(obj, methodname) try: res = function(*args, **kwds) except Exception, e: msg = ('#ERROR', e) else: typeid = gettypeid and gettypeid.get(methodname, None) if typeid: rident, rexposed = self.create(conn, typeid, res) token = Token(typeid, self.address, rident) msg = ('#PROXY', (rexposed, token)) else: msg = ('#RETURN', res) except AttributeError: if methodname is None: msg = ('#TRACEBACK', format_exc()) else: try: fallback_func = self.fallback_mapping[methodname] result = fallback_func( self, conn, ident, obj, *args, **kwds ) msg = ('#RETURN', result) except Exception: msg = ('#TRACEBACK', format_exc()) except EOFError: util.debug('got EOF -- exiting thread serving %r', threading.current_thread().name) sys.exit(0) except Exception: msg = ('#TRACEBACK', format_exc()) try: try: send(msg) except Exception, e: send(('#UNSERIALIZABLE', repr(msg))) except Exception, e: util.info('exception in thread serving %r', threading.current_thread().name) util.info(' ... message was %r', msg) util.info(' ... exception was %r', e) conn.close() sys.exit(1) def fallback_getvalue(self, conn, ident, obj): return obj def fallback_str(self, conn, ident, obj): return str(obj) def fallback_repr(self, conn, ident, obj): return repr(obj) fallback_mapping = { '__str__':fallback_str, '__repr__':fallback_repr, '#GETVALUE':fallback_getvalue } def dummy(self, c): pass def debug_info(self, c): ''' Return some info --- useful to spot problems with refcounting ''' self.mutex.acquire() try: result = [] keys = self.id_to_obj.keys() keys.sort() for ident in keys: if ident != '0': result.append(' %s: refcount=%s\n %s' % (ident, self.id_to_refcount[ident], str(self.id_to_obj[ident][0])[:75])) return '\n'.join(result) finally: self.mutex.release() def number_of_objects(self, c): ''' Number of shared objects ''' return len(self.id_to_obj) - 1 # don't count ident='0' def shutdown(self, c): ''' Shutdown this process ''' try: try: util.debug('manager received shutdown message') c.send(('#RETURN', None)) if sys.stdout != sys.__stdout__: util.debug('resetting stdout, stderr') sys.stdout = sys.__stdout__ sys.stderr = sys.__stderr__ util._run_finalizers(0) for p in active_children(): util.debug('terminating a child process of manager') p.terminate() for p in active_children(): util.debug('terminating a child process of manager') p.join() util._run_finalizers() util.info('manager exiting with exitcode 0') except: import traceback traceback.print_exc() finally: exit(0) def create(self, c, typeid, *args, **kwds): ''' Create a new shared object and return its id ''' self.mutex.acquire() try: callable, exposed, method_to_typeid, proxytype = \ self.registry[typeid] if callable is None: assert len(args) == 1 and not kwds obj = args[0] else: obj = callable(*args, **kwds) if exposed is None: exposed = public_methods(obj) if method_to_typeid is not None: assert type(method_to_typeid) is dict exposed = list(exposed) + list(method_to_typeid) ident = '%x' % id(obj) # convert to string because xmlrpclib # only has 32 bit signed integers util.debug('%r callable returned object with id %r', typeid, ident) self.id_to_obj[ident] = (obj, set(exposed), method_to_typeid) if ident not in self.id_to_refcount: self.id_to_refcount[ident] = 0 # increment the reference count immediately, to avoid # this object being garbage collected before a Proxy # object for it can be created. The caller of create() # is responsible for doing a decref once the Proxy object # has been created. self.incref(c, ident) return ident, tuple(exposed) finally: self.mutex.release() def get_methods(self, c, token): ''' Return the methods of the shared object indicated by token ''' return tuple(self.id_to_obj[token.id][1]) def accept_connection(self, c, name): ''' Spawn a new thread to serve this connection ''' threading.current_thread().name = name c.send(('#RETURN', None)) self.serve_client(c) def incref(self, c, ident): self.mutex.acquire() try: self.id_to_refcount[ident] += 1 finally: self.mutex.release() def decref(self, c, ident): self.mutex.acquire() try: assert self.id_to_refcount[ident] >= 1 self.id_to_refcount[ident] -= 1 if self.id_to_refcount[ident] == 0: del self.id_to_obj[ident], self.id_to_refcount[ident] util.debug('disposing of obj with id %r', ident) finally: self.mutex.release() # # Class to represent state of a manager # class State(object): __slots__ = ['value'] INITIAL = 0 STARTED = 1 SHUTDOWN = 2 # # Mapping from serializer name to Listener and Client types # listener_client = { 'pickle' : (connection.Listener, connection.Client), 'xmlrpclib' : (connection.XmlListener, connection.XmlClient) } # # Definition of BaseManager # class BaseManager(object): ''' Base class for managers ''' _registry = {} _Server = Server def __init__(self, address=None, authkey=None, serializer='pickle'): if authkey is None: authkey = current_process().authkey self._address = address # XXX not final address if eg ('', 0) self._authkey = AuthenticationString(authkey) self._state = State() self._state.value = State.INITIAL self._serializer = serializer self._Listener, self._Client = listener_client[serializer] def __reduce__(self): return type(self).from_address, \ (self._address, self._authkey, self._serializer) def get_server(self): ''' Return server object with serve_forever() method and address attribute ''' assert self._state.value == State.INITIAL return Server(self._registry, self._address, self._authkey, self._serializer) def connect(self): ''' Connect manager object to the server process ''' Listener, Client = listener_client[self._serializer] conn = Client(self._address, authkey=self._authkey) dispatch(conn, None, 'dummy') self._state.value = State.STARTED def start(self, initializer=None, initargs=()): ''' Spawn a server process for this manager object ''' assert self._state.value == State.INITIAL if initializer is not None and not hasattr(initializer, '__call__'): raise TypeError('initializer must be a callable') # pipe over which we will retrieve address of server reader, writer = connection.Pipe(duplex=False) # spawn process which runs a server self._process = Process( target=type(self)._run_server, args=(self._registry, self._address, self._authkey, self._serializer, writer, initializer, initargs), ) ident = ':'.join(str(i) for i in self._process._identity) self._process.name = type(self).__name__ + '-' + ident self._process.start() # get address of server writer.close() self._address = reader.recv() reader.close() # register a finalizer self._state.value = State.STARTED self.shutdown = util.Finalize( self, type(self)._finalize_manager, args=(self._process, self._address, self._authkey, self._state, self._Client), exitpriority=0 ) @classmethod def _run_server(cls, registry, address, authkey, serializer, writer, initializer=None, initargs=()): ''' Create a server, report its address and run it ''' if initializer is not None: initializer(*initargs) # create server server = cls._Server(registry, address, authkey, serializer) # inform parent process of the server's address writer.send(server.address) writer.close() # run the manager util.info('manager serving at %r', server.address) server.serve_forever() def _create(self, typeid, *args, **kwds): ''' Create a new shared object; return the token and exposed tuple ''' assert self._state.value == State.STARTED, 'server not yet started' conn = self._Client(self._address, authkey=self._authkey) try: id, exposed = dispatch(conn, None, 'create', (typeid,)+args, kwds) finally: conn.close() return Token(typeid, self._address, id), exposed def join(self, timeout=None): ''' Join the manager process (if it has been spawned) ''' self._process.join(timeout) def _debug_info(self): ''' Return some info about the servers shared objects and connections ''' conn = self._Client(self._address, authkey=self._authkey) try: return dispatch(conn, None, 'debug_info') finally: conn.close() def _number_of_objects(self): ''' Return the number of shared objects ''' conn = self._Client(self._address, authkey=self._authkey) try: return dispatch(conn, None, 'number_of_objects') finally: conn.close() def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.shutdown() @staticmethod def _finalize_manager(process, address, authkey, state, _Client): ''' Shutdown the manager process; will be registered as a finalizer ''' if process.is_alive(): util.info('sending shutdown message to manager') try: conn = _Client(address, authkey=authkey) try: dispatch(conn, None, 'shutdown') finally: conn.close() except Exception: pass process.join(timeout=0.2) if process.is_alive(): util.info('manager still alive') if hasattr(process, 'terminate'): util.info('trying to `terminate()` manager process') process.terminate() process.join(timeout=0.1) if process.is_alive(): util.info('manager still alive after terminate') state.value = State.SHUTDOWN try: del BaseProxy._address_to_local[address] except KeyError: pass address = property(lambda self: self._address) @classmethod def register(cls, typeid, callable=None, proxytype=None, exposed=None, method_to_typeid=None, create_method=True): ''' Register a typeid with the manager type ''' if '_registry' not in cls.__dict__: cls._registry = cls._registry.copy() if proxytype is None: proxytype = AutoProxy exposed = exposed or getattr(proxytype, '_exposed_', None) method_to_typeid = method_to_typeid or \ getattr(proxytype, '_method_to_typeid_', None) if method_to_typeid: for key, value in method_to_typeid.items(): assert type(key) is str, '%r is not a string' % key assert type(value) is str, '%r is not a string' % value cls._registry[typeid] = ( callable, exposed, method_to_typeid, proxytype ) if create_method: def temp(self, *args, **kwds): util.debug('requesting creation of a shared %r object', typeid) token, exp = self._create(typeid, *args, **kwds) proxy = proxytype( token, self._serializer, manager=self, authkey=self._authkey, exposed=exp ) conn = self._Client(token.address, authkey=self._authkey) dispatch(conn, None, 'decref', (token.id,)) return proxy temp.__name__ = typeid setattr(cls, typeid, temp) # # Subclass of set which get cleared after a fork # class ProcessLocalSet(set): def __init__(self): util.register_after_fork(self, lambda obj: obj.clear()) def __reduce__(self): return type(self), () # # Definition of BaseProxy # class BaseProxy(object): ''' A base for proxies of shared objects ''' _address_to_local = {} _mutex = util.ForkAwareThreadLock() def __init__(self, token, serializer, manager=None, authkey=None, exposed=None, incref=True): BaseProxy._mutex.acquire() try: tls_idset = BaseProxy._address_to_local.get(token.address, None) if tls_idset is None: tls_idset = util.ForkAwareLocal(), ProcessLocalSet() BaseProxy._address_to_local[token.address] = tls_idset finally: BaseProxy._mutex.release() # self._tls is used to record the connection used by this # thread to communicate with the manager at token.address self._tls = tls_idset[0] # self._idset is used to record the identities of all shared # objects for which the current process owns references and # which are in the manager at token.address self._idset = tls_idset[1] self._token = token self._id = self._token.id self._manager = manager self._serializer = serializer self._Client = listener_client[serializer][1] if authkey is not None: self._authkey = AuthenticationString(authkey) elif self._manager is not None: self._authkey = self._manager._authkey else: self._authkey = current_process().authkey if incref: self._incref() util.register_after_fork(self, BaseProxy._after_fork) def _connect(self): util.debug('making connection to manager') name = current_process().name if threading.current_thread().name != 'MainThread': name += '|' + threading.current_thread().name conn = self._Client(self._token.address, authkey=self._authkey) dispatch(conn, None, 'accept_connection', (name,)) self._tls.connection = conn def _callmethod(self, methodname, args=(), kwds={}): ''' Try to call a method of the referrent and return a copy of the result ''' try: conn = self._tls.connection except AttributeError: util.debug('thread %r does not own a connection', threading.current_thread().name) self._connect() conn = self._tls.connection conn.send((self._id, methodname, args, kwds)) kind, result = conn.recv() if kind == '#RETURN': return result elif kind == '#PROXY': exposed, token = result proxytype = self._manager._registry[token.typeid][-1] proxy = proxytype( token, self._serializer, manager=self._manager, authkey=self._authkey, exposed=exposed ) conn = self._Client(token.address, authkey=self._authkey) dispatch(conn, None, 'decref', (token.id,)) return proxy raise convert_to_error(kind, result) def _getvalue(self): ''' Get a copy of the value of the referent ''' return self._callmethod('#GETVALUE') def _incref(self): conn = self._Client(self._token.address, authkey=self._authkey) dispatch(conn, None, 'incref', (self._id,)) util.debug('INCREF %r', self._token.id) self._idset.add(self._id) state = self._manager and self._manager._state self._close = util.Finalize( self, BaseProxy._decref, args=(self._token, self._authkey, state, self._tls, self._idset, self._Client), exitpriority=10 ) @staticmethod def _decref(token, authkey, state, tls, idset, _Client): idset.discard(token.id) # check whether manager is still alive if state is None or state.value == State.STARTED: # tell manager this process no longer cares about referent try: util.debug('DECREF %r', token.id) conn = _Client(token.address, authkey=authkey) dispatch(conn, None, 'decref', (token.id,)) except Exception, e: util.debug('... decref failed %s', e) else: util.debug('DECREF %r -- manager already shutdown', token.id) # check whether we can close this thread's connection because # the process owns no more references to objects for this manager if not idset and hasattr(tls, 'connection'): util.debug('thread %r has no more proxies so closing conn', threading.current_thread().name) tls.connection.close() del tls.connection def _after_fork(self): self._manager = None try: self._incref() except Exception, e: # the proxy may just be for a manager which has shutdown util.info('incref failed: %s' % e) def __reduce__(self): kwds = {} if Popen.thread_is_spawning(): kwds['authkey'] = self._authkey if getattr(self, '_isauto', False): kwds['exposed'] = self._exposed_ return (RebuildProxy, (AutoProxy, self._token, self._serializer, kwds)) else: return (RebuildProxy, (type(self), self._token, self._serializer, kwds)) def __deepcopy__(self, memo): return self._getvalue() def __repr__(self): return '<%s object, typeid %r at %s>' % \ (type(self).__name__, self._token.typeid, '0x%x' % id(self)) def __str__(self): ''' Return representation of the referent (or a fall-back if that fails) ''' try: return self._callmethod('__repr__') except Exception: return repr(self)[:-1] + "; '__str__()' failed>" # # Function used for unpickling # def RebuildProxy(func, token, serializer, kwds): ''' Function used for unpickling proxy objects. If possible the shared object is returned, or otherwise a proxy for it. ''' server = getattr(current_process(), '_manager_server', None) if server and server.address == token.address: return server.id_to_obj[token.id][0] else: incref = ( kwds.pop('incref', True) and not getattr(current_process(), '_inheriting', False) ) return func(token, serializer, incref=incref, **kwds) # # Functions to create proxies and proxy types # def MakeProxyType(name, exposed, _cache={}): ''' Return an proxy type whose methods are given by `exposed` ''' exposed = tuple(exposed) try: return _cache[(name, exposed)] except KeyError: pass dic = {} for meth in exposed: exec '''def %s(self, *args, **kwds): return self._callmethod(%r, args, kwds)''' % (meth, meth) in dic ProxyType = type(name, (BaseProxy,), dic) ProxyType._exposed_ = exposed _cache[(name, exposed)] = ProxyType return ProxyType def AutoProxy(token, serializer, manager=None, authkey=None, exposed=None, incref=True): ''' Return an auto-proxy for `token` ''' _Client = listener_client[serializer][1] if exposed is None: conn = _Client(token.address, authkey=authkey) try: exposed = dispatch(conn, None, 'get_methods', (token,)) finally: conn.close() if authkey is None and manager is not None: authkey = manager._authkey if authkey is None: authkey = current_process().authkey ProxyType = MakeProxyType('AutoProxy[%s]' % token.typeid, exposed) proxy = ProxyType(token, serializer, manager=manager, authkey=authkey, incref=incref) proxy._isauto = True return proxy # # Types/callables which we will register with SyncManager # class Namespace(object): def __init__(self, **kwds): self.__dict__.update(kwds) def __repr__(self): items = self.__dict__.items() temp = [] for name, value in items: if not name.startswith('_'): temp.append('%s=%r' % (name, value)) temp.sort() return 'Namespace(%s)' % str.join(', ', temp) class Value(object): def __init__(self, typecode, value, lock=True): self._typecode = typecode self._value = value def get(self): return self._value def set(self, value): self._value = value def __repr__(self): return '%s(%r, %r)'%(type(self).__name__, self._typecode, self._value) value = property(get, set) def Array(typecode, sequence, lock=True): return array.array(typecode, sequence) # # Proxy types used by SyncManager # class IteratorProxy(BaseProxy): # XXX remove methods for Py3.0 and Py2.6 _exposed_ = ('__next__', 'next', 'send', 'throw', 'close') def __iter__(self): return self def __next__(self, *args): return self._callmethod('__next__', args) def next(self, *args): return self._callmethod('next', args) def send(self, *args): return self._callmethod('send', args) def throw(self, *args): return self._callmethod('throw', args) def close(self, *args): return self._callmethod('close', args) class AcquirerProxy(BaseProxy): _exposed_ = ('acquire', 'release') def acquire(self, blocking=True): return self._callmethod('acquire', (blocking,)) def release(self): return self._callmethod('release') def __enter__(self): return self._callmethod('acquire') def __exit__(self, exc_type, exc_val, exc_tb): return self._callmethod('release') class ConditionProxy(AcquirerProxy): # XXX will Condition.notfyAll() name be available in Py3.0? _exposed_ = ('acquire', 'release', 'wait', 'notify', 'notify_all') def wait(self, timeout=None): return self._callmethod('wait', (timeout,)) def notify(self): return self._callmethod('notify') def notify_all(self): return self._callmethod('notify_all') class EventProxy(BaseProxy): _exposed_ = ('is_set', 'set', 'clear', 'wait') def is_set(self): return self._callmethod('is_set') def set(self): return self._callmethod('set') def clear(self): return self._callmethod('clear') def wait(self, timeout=None): return self._callmethod('wait', (timeout,)) class NamespaceProxy(BaseProxy): _exposed_ = ('__getattribute__', '__setattr__', '__delattr__') def __getattr__(self, key): if key[0] == '_': return object.__getattribute__(self, key) callmethod = object.__getattribute__(self, '_callmethod') return callmethod('__getattribute__', (key,)) def __setattr__(self, key, value): if key[0] == '_': return object.__setattr__(self, key, value) callmethod = object.__getattribute__(self, '_callmethod') return callmethod('__setattr__', (key, value)) def __delattr__(self, key): if key[0] == '_': return object.__delattr__(self, key) callmethod = object.__getattribute__(self, '_callmethod') return callmethod('__delattr__', (key,)) class ValueProxy(BaseProxy): _exposed_ = ('get', 'set') def get(self): return self._callmethod('get') def set(self, value): return self._callmethod('set', (value,)) value = property(get, set) BaseListProxy = MakeProxyType('BaseListProxy', ( '__add__', '__contains__', '__delitem__', '__delslice__', '__getitem__', '__getslice__', '__len__', '__mul__', '__reversed__', '__rmul__', '__setitem__', '__setslice__', 'append', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort', '__imul__' )) # XXX __getslice__ and __setslice__ unneeded in Py3.0 class ListProxy(BaseListProxy): def __iadd__(self, value): self._callmethod('extend', (value,)) return self def __imul__(self, value): self._callmethod('__imul__', (value,)) return self DictProxy = MakeProxyType('DictProxy', ( '__contains__', '__delitem__', '__getitem__', '__len__', '__setitem__', 'clear', 'copy', 'get', 'has_key', 'items', 'keys', 'pop', 'popitem', 'setdefault', 'update', 'values' )) ArrayProxy = MakeProxyType('ArrayProxy', ( '__len__', '__getitem__', '__setitem__', '__getslice__', '__setslice__' )) # XXX __getslice__ and __setslice__ unneeded in Py3.0 PoolProxy = MakeProxyType('PoolProxy', ( 'apply', 'apply_async', 'close', 'imap', 'imap_unordered', 'join', 'map', 'map_async', 'terminate' )) PoolProxy._method_to_typeid_ = { 'apply_async': 'AsyncResult', 'map_async': 'AsyncResult', 'imap': 'Iterator', 'imap_unordered': 'Iterator' } # # Definition of SyncManager # class SyncManager(BaseManager): ''' Subclass of `BaseManager` which supports a number of shared object types. The types registered are those intended for the synchronization of threads, plus `dict`, `list` and `Namespace`. The `multiprocessing.Manager()` function creates started instances of this class. ''' SyncManager.register('Queue', Queue.Queue) SyncManager.register('JoinableQueue', Queue.Queue) SyncManager.register('Event', threading.Event, EventProxy) SyncManager.register('Lock', threading.Lock, AcquirerProxy) SyncManager.register('RLock', threading.RLock, AcquirerProxy) SyncManager.register('Semaphore', threading.Semaphore, AcquirerProxy) SyncManager.register('BoundedSemaphore', threading.BoundedSemaphore, AcquirerProxy) SyncManager.register('Condition', threading.Condition, ConditionProxy) SyncManager.register('Pool', Pool, PoolProxy) SyncManager.register('list', list, ListProxy) SyncManager.register('dict', dict, DictProxy) SyncManager.register('Value', Value, ValueProxy) SyncManager.register('Array', Array, ArrayProxy) SyncManager.register('Namespace', Namespace, NamespaceProxy) # types returned by methods of PoolProxy SyncManager.register('Iterator', proxytype=IteratorProxy, create_method=False) SyncManager.register('AsyncResult', create_method=False) 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Module providing the `Pool` class for managing a process pool # # multiprocessing/pool.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = ['Pool'] # # Imports # import threading import Queue import itertools import collections import time from multiprocessing import Process, cpu_count, TimeoutError from multiprocessing.util import Finalize, debug # # Constants representing the state of a pool # RUN = 0 CLOSE = 1 TERMINATE = 2 # # Miscellaneous # job_counter = itertools.count() def mapstar(args): return map(*args) # # Code run by worker processes # class MaybeEncodingError(Exception): """Wraps possible unpickleable errors, so they can be safely sent through the socket.""" def __init__(self, exc, value): self.exc = repr(exc) self.value = repr(value) super(MaybeEncodingError, self).__init__(self.exc, self.value) def __str__(self): return "Error sending result: '%s'. Reason: '%s'" % (self.value, self.exc) def __repr__(self): return "" % str(self) def worker(inqueue, outqueue, initializer=None, initargs=(), maxtasks=None): assert maxtasks is None or (type(maxtasks) == int and maxtasks > 0) put = outqueue.put get = inqueue.get if hasattr(inqueue, '_writer'): inqueue._writer.close() outqueue._reader.close() if initializer is not None: initializer(*initargs) completed = 0 while maxtasks is None or (maxtasks and completed < maxtasks): try: task = get() except (EOFError, IOError): debug('worker got EOFError or IOError -- exiting') break if task is None: debug('worker got sentinel -- exiting') break job, i, func, args, kwds = task try: result = (True, func(*args, **kwds)) except Exception, e: result = (False, e) try: put((job, i, result)) except Exception as e: wrapped = MaybeEncodingError(e, result[1]) debug("Possible encoding error while sending result: %s" % ( wrapped)) put((job, i, (False, wrapped))) completed += 1 debug('worker exiting after %d tasks' % completed) # # Class representing a process pool # class Pool(object): ''' Class which supports an async version of the `apply()` builtin ''' Process = Process def __init__(self, processes=None, initializer=None, initargs=(), maxtasksperchild=None): self._setup_queues() self._taskqueue = Queue.Queue() self._cache = {} self._state = RUN self._maxtasksperchild = maxtasksperchild self._initializer = initializer self._initargs = initargs if processes is None: try: processes = cpu_count() except NotImplementedError: processes = 1 if processes < 1: raise ValueError("Number of processes must be at least 1") if initializer is not None and not hasattr(initializer, '__call__'): raise TypeError('initializer must be a callable') self._processes = processes self._pool = [] self._repopulate_pool() self._worker_handler = threading.Thread( target=Pool._handle_workers, args=(self, ) ) self._worker_handler.daemon = True self._worker_handler._state = RUN self._worker_handler.start() self._task_handler = threading.Thread( target=Pool._handle_tasks, args=(self._taskqueue, self._quick_put, self._outqueue, self._pool) ) self._task_handler.daemon = True self._task_handler._state = RUN self._task_handler.start() self._result_handler = threading.Thread( target=Pool._handle_results, args=(self._outqueue, self._quick_get, self._cache) ) self._result_handler.daemon = True self._result_handler._state = RUN self._result_handler.start() self._terminate = Finalize( self, self._terminate_pool, args=(self._taskqueue, self._inqueue, self._outqueue, self._pool, self._worker_handler, self._task_handler, self._result_handler, self._cache), exitpriority=15 ) def _join_exited_workers(self): """Cleanup after any worker processes which have exited due to reaching their specified lifetime. Returns True if any workers were cleaned up. """ cleaned = False for i in reversed(range(len(self._pool))): worker = self._pool[i] if worker.exitcode is not None: # worker exited debug('cleaning up worker %d' % i) worker.join() cleaned = True del self._pool[i] return cleaned def _repopulate_pool(self): """Bring the number of pool processes up to the specified number, for use after reaping workers which have exited. """ for i in range(self._processes - len(self._pool)): w = self.Process(target=worker, args=(self._inqueue, self._outqueue, self._initializer, self._initargs, self._maxtasksperchild) ) self._pool.append(w) w.name = w.name.replace('Process', 'PoolWorker') w.daemon = True w.start() debug('added worker') def _maintain_pool(self): """Clean up any exited workers and start replacements for them. """ if self._join_exited_workers(): self._repopulate_pool() def _setup_queues(self): from .queues import SimpleQueue self._inqueue = SimpleQueue() self._outqueue = SimpleQueue() self._quick_put = self._inqueue._writer.send self._quick_get = self._outqueue._reader.recv def apply(self, func, args=(), kwds={}): ''' Equivalent of `apply()` builtin ''' assert self._state == RUN return self.apply_async(func, args, kwds).get() def map(self, func, iterable, chunksize=None): ''' Equivalent of `map()` builtin ''' assert self._state == RUN return self.map_async(func, iterable, chunksize).get() def imap(self, func, iterable, chunksize=1): ''' Equivalent of `itertools.imap()` -- can be MUCH slower than `Pool.map()` ''' assert self._state == RUN if chunksize == 1: result = IMapIterator(self._cache) self._taskqueue.put((((result._job, i, func, (x,), {}) for i, x in enumerate(iterable)), result._set_length)) return result else: assert chunksize > 1 task_batches = Pool._get_tasks(func, iterable, chunksize) result = IMapIterator(self._cache) self._taskqueue.put((((result._job, i, mapstar, (x,), {}) for i, x in enumerate(task_batches)), result._set_length)) return (item for chunk in result for item in chunk) def imap_unordered(self, func, iterable, chunksize=1): ''' Like `imap()` method but ordering of results is arbitrary ''' assert self._state == RUN if chunksize == 1: result = IMapUnorderedIterator(self._cache) self._taskqueue.put((((result._job, i, func, (x,), {}) for i, x in enumerate(iterable)), result._set_length)) return result else: assert chunksize > 1 task_batches = Pool._get_tasks(func, iterable, chunksize) result = IMapUnorderedIterator(self._cache) self._taskqueue.put((((result._job, i, mapstar, (x,), {}) for i, x in enumerate(task_batches)), result._set_length)) return (item for chunk in result for item in chunk) def apply_async(self, func, args=(), kwds={}, callback=None): ''' Asynchronous equivalent of `apply()` builtin ''' assert self._state == RUN result = ApplyResult(self._cache, callback) self._taskqueue.put(([(result._job, None, func, args, kwds)], None)) return result def map_async(self, func, iterable, chunksize=None, callback=None): ''' Asynchronous equivalent of `map()` builtin ''' assert self._state == RUN if not hasattr(iterable, '__len__'): iterable = list(iterable) if chunksize is None: chunksize, extra = divmod(len(iterable), len(self._pool) * 4) if extra: chunksize += 1 if len(iterable) == 0: chunksize = 0 task_batches = Pool._get_tasks(func, iterable, chunksize) result = MapResult(self._cache, chunksize, len(iterable), callback) self._taskqueue.put((((result._job, i, mapstar, (x,), {}) for i, x in enumerate(task_batches)), None)) return result @staticmethod def _handle_workers(pool): thread = threading.current_thread() # Keep maintaining workers until the cache gets drained, unless the pool # is terminated. while thread._state == RUN or (pool._cache and thread._state != TERMINATE): pool._maintain_pool() time.sleep(0.1) # send sentinel to stop workers pool._taskqueue.put(None) debug('worker handler exiting') @staticmethod def _handle_tasks(taskqueue, put, outqueue, pool): thread = threading.current_thread() for taskseq, set_length in iter(taskqueue.get, None): i = -1 for i, task in enumerate(taskseq): if thread._state: debug('task handler found thread._state != RUN') break try: put(task) except IOError: debug('could not put task on queue') break else: if set_length: debug('doing set_length()') set_length(i+1) continue break else: debug('task handler got sentinel') try: # tell result handler to finish when cache is empty debug('task handler sending sentinel to result handler') outqueue.put(None) # tell workers there is no more work debug('task handler sending sentinel to workers') for p in pool: put(None) except IOError: debug('task handler got IOError when sending sentinels') debug('task handler exiting') @staticmethod def _handle_results(outqueue, get, cache): thread = threading.current_thread() while 1: try: task = get() except (IOError, EOFError): debug('result handler got EOFError/IOError -- exiting') return if thread._state: assert thread._state == TERMINATE debug('result handler found thread._state=TERMINATE') break if task is None: debug('result handler got sentinel') break job, i, obj = task try: cache[job]._set(i, obj) except KeyError: pass while cache and thread._state != TERMINATE: try: task = get() except (IOError, EOFError): debug('result handler got EOFError/IOError -- exiting') return if task is None: debug('result handler ignoring extra sentinel') continue job, i, obj = task try: cache[job]._set(i, obj) except KeyError: pass if hasattr(outqueue, '_reader'): debug('ensuring that outqueue is not full') # If we don't make room available in outqueue then # attempts to add the sentinel (None) to outqueue may # block. There is guaranteed to be no more than 2 sentinels. try: for i in range(10): if not outqueue._reader.poll(): break get() except (IOError, EOFError): pass debug('result handler exiting: len(cache)=%s, thread._state=%s', len(cache), thread._state) @staticmethod def _get_tasks(func, it, size): it = iter(it) while 1: x = tuple(itertools.islice(it, size)) if not x: return yield (func, x) def __reduce__(self): raise NotImplementedError( 'pool objects cannot be passed between processes or pickled' ) def close(self): debug('closing pool') if self._state == RUN: self._state = CLOSE self._worker_handler._state = CLOSE def terminate(self): debug('terminating pool') self._state = TERMINATE self._worker_handler._state = TERMINATE self._terminate() def join(self): debug('joining pool') assert self._state in (CLOSE, TERMINATE) self._worker_handler.join() self._task_handler.join() self._result_handler.join() for p in self._pool: p.join() @staticmethod def _help_stuff_finish(inqueue, task_handler, size): # task_handler may be blocked trying to put items on inqueue debug('removing tasks from inqueue until task handler finished') inqueue._rlock.acquire() while task_handler.is_alive() and inqueue._reader.poll(): inqueue._reader.recv() time.sleep(0) @classmethod def _terminate_pool(cls, taskqueue, inqueue, outqueue, pool, worker_handler, task_handler, result_handler, cache): # this is guaranteed to only be called once debug('finalizing pool') worker_handler._state = TERMINATE task_handler._state = TERMINATE debug('helping task handler/workers to finish') cls._help_stuff_finish(inqueue, task_handler, len(pool)) assert result_handler.is_alive() or len(cache) == 0 result_handler._state = TERMINATE outqueue.put(None) # sentinel # We must wait for the worker handler to exit before terminating # workers because we don't want workers to be restarted behind our back. debug('joining worker handler') if threading.current_thread() is not worker_handler: worker_handler.join(1e100) # Terminate workers which haven't already finished. if pool and hasattr(pool[0], 'terminate'): debug('terminating workers') for p in pool: if p.exitcode is None: p.terminate() debug('joining task handler') if threading.current_thread() is not task_handler: task_handler.join(1e100) debug('joining result handler') if threading.current_thread() is not result_handler: result_handler.join(1e100) if pool and hasattr(pool[0], 'terminate'): debug('joining pool workers') for p in pool: if p.is_alive(): # worker has not yet exited debug('cleaning up worker %d' % p.pid) p.join() # # Class whose instances are returned by `Pool.apply_async()` # class ApplyResult(object): def __init__(self, cache, callback): self._cond = threading.Condition(threading.Lock()) self._job = job_counter.next() self._cache = cache self._ready = False self._callback = callback cache[self._job] = self def ready(self): return self._ready def successful(self): assert self._ready return self._success def wait(self, timeout=None): self._cond.acquire() try: if not self._ready: self._cond.wait(timeout) finally: self._cond.release() def get(self, timeout=None): self.wait(timeout) if not self._ready: raise TimeoutError if self._success: return self._value else: raise self._value def _set(self, i, obj): self._success, self._value = obj if self._callback and self._success: self._callback(self._value) self._cond.acquire() try: self._ready = True self._cond.notify() finally: self._cond.release() del self._cache[self._job] AsyncResult = ApplyResult # create alias -- see #17805 # # Class whose instances are returned by `Pool.map_async()` # class MapResult(ApplyResult): def __init__(self, cache, chunksize, length, callback): ApplyResult.__init__(self, cache, callback) self._success = True self._value = [None] * length self._chunksize = chunksize if chunksize <= 0: self._number_left = 0 self._ready = True del cache[self._job] else: self._number_left = length//chunksize + bool(length % chunksize) def _set(self, i, success_result): success, result = success_result if success: self._value[i*self._chunksize:(i+1)*self._chunksize] = result self._number_left -= 1 if self._number_left == 0: if self._callback: self._callback(self._value) del self._cache[self._job] self._cond.acquire() try: self._ready = True self._cond.notify() finally: self._cond.release() else: self._success = False self._value = result del self._cache[self._job] self._cond.acquire() try: self._ready = True self._cond.notify() finally: self._cond.release() # # Class whose instances are returned by `Pool.imap()` # class IMapIterator(object): def __init__(self, cache): self._cond = threading.Condition(threading.Lock()) self._job = job_counter.next() self._cache = cache self._items = collections.deque() self._index = 0 self._length = None self._unsorted = {} cache[self._job] = self def __iter__(self): return self def next(self, timeout=None): self._cond.acquire() try: try: item = self._items.popleft() except IndexError: if self._index == self._length: raise StopIteration self._cond.wait(timeout) try: item = self._items.popleft() except IndexError: if self._index == self._length: raise StopIteration raise TimeoutError finally: self._cond.release() success, value = item if success: return value raise value __next__ = next # XXX def _set(self, i, obj): self._cond.acquire() try: if self._index == i: self._items.append(obj) self._index += 1 while self._index in self._unsorted: obj = self._unsorted.pop(self._index) self._items.append(obj) self._index += 1 self._cond.notify() else: self._unsorted[i] = obj if self._index == self._length: del self._cache[self._job] finally: self._cond.release() def _set_length(self, length): self._cond.acquire() try: self._length = length if self._index == self._length: self._cond.notify() del self._cache[self._job] finally: self._cond.release() # # Class whose instances are returned by `Pool.imap_unordered()` # class IMapUnorderedIterator(IMapIterator): def _set(self, i, obj): self._cond.acquire() try: self._items.append(obj) self._index += 1 self._cond.notify() if self._index == self._length: del self._cache[self._job] finally: self._cond.release() # # # class ThreadPool(Pool): from .dummy import Process def __init__(self, processes=None, initializer=None, initargs=()): Pool.__init__(self, processes, initializer, initargs) def _setup_queues(self): self._inqueue = Queue.Queue() self._outqueue = Queue.Queue() self._quick_put = self._inqueue.put self._quick_get = self._outqueue.get @staticmethod def _help_stuff_finish(inqueue, task_handler, size): # put sentinels at head of inqueue to make workers finish inqueue.not_empty.acquire() try: inqueue.queue.clear() inqueue.queue.extend([None] * size) inqueue.not_empty.notify_all() finally: inqueue.not_empty.release() synchronize.py000064400000024635147207507420007513 0ustar00# # Module implementing synchronization primitives # # multiprocessing/synchronize.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [ 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Condition', 'Event' ] import threading import os import sys from time import time as _time, sleep as _sleep import _multiprocessing from multiprocessing.process import current_process from multiprocessing.util import Finalize, register_after_fork, debug from multiprocessing.forking import assert_spawning, Popen # Try to import the mp.synchronize module cleanly, if it fails # raise ImportError for platforms lacking a working sem_open implementation. # See issue 3770 try: from _multiprocessing import SemLock except (ImportError): raise ImportError("This platform lacks a functioning sem_open" + " implementation, therefore, the required" + " synchronization primitives needed will not" + " function, see issue 3770.") # # Constants # RECURSIVE_MUTEX, SEMAPHORE = range(2) SEM_VALUE_MAX = _multiprocessing.SemLock.SEM_VALUE_MAX # # Base class for semaphores and mutexes; wraps `_multiprocessing.SemLock` # class SemLock(object): def __init__(self, kind, value, maxvalue): sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue) debug('created semlock with handle %s' % sl.handle) self._make_methods() if sys.platform != 'win32': def _after_fork(obj): obj._semlock._after_fork() register_after_fork(self, _after_fork) def _make_methods(self): self.acquire = self._semlock.acquire self.release = self._semlock.release def __enter__(self): return self._semlock.__enter__() def __exit__(self, *args): return self._semlock.__exit__(*args) def __getstate__(self): assert_spawning(self) sl = self._semlock return (Popen.duplicate_for_child(sl.handle), sl.kind, sl.maxvalue) def __setstate__(self, state): self._semlock = _multiprocessing.SemLock._rebuild(*state) debug('recreated blocker with handle %r' % state[0]) self._make_methods() # # Semaphore # class Semaphore(SemLock): def __init__(self, value=1): SemLock.__init__(self, SEMAPHORE, value, SEM_VALUE_MAX) def get_value(self): return self._semlock._get_value() def __repr__(self): try: value = self._semlock._get_value() except Exception: value = 'unknown' return '' % value # # Bounded semaphore # class BoundedSemaphore(Semaphore): def __init__(self, value=1): SemLock.__init__(self, SEMAPHORE, value, value) def __repr__(self): try: value = self._semlock._get_value() except Exception: value = 'unknown' return '' % \ (value, self._semlock.maxvalue) # # Non-recursive lock # class Lock(SemLock): def __init__(self): SemLock.__init__(self, SEMAPHORE, 1, 1) def __repr__(self): try: if self._semlock._is_mine(): name = current_process().name if threading.current_thread().name != 'MainThread': name += '|' + threading.current_thread().name elif self._semlock._get_value() == 1: name = 'None' elif self._semlock._count() > 0: name = 'SomeOtherThread' else: name = 'SomeOtherProcess' except Exception: name = 'unknown' return '' % name # # Recursive lock # class RLock(SemLock): def __init__(self): SemLock.__init__(self, RECURSIVE_MUTEX, 1, 1) def __repr__(self): try: if self._semlock._is_mine(): name = current_process().name if threading.current_thread().name != 'MainThread': name += '|' + threading.current_thread().name count = self._semlock._count() elif self._semlock._get_value() == 1: name, count = 'None', 0 elif self._semlock._count() > 0: name, count = 'SomeOtherThread', 'nonzero' else: name, count = 'SomeOtherProcess', 'nonzero' except Exception: name, count = 'unknown', 'unknown' return '' % (name, count) # # Condition variable # class Condition(object): def __init__(self, lock=None): self._lock = lock or RLock() self._sleeping_count = Semaphore(0) self._woken_count = Semaphore(0) self._wait_semaphore = Semaphore(0) self._make_methods() def __getstate__(self): assert_spawning(self) return (self._lock, self._sleeping_count, self._woken_count, self._wait_semaphore) def __setstate__(self, state): (self._lock, self._sleeping_count, self._woken_count, self._wait_semaphore) = state self._make_methods() def __enter__(self): return self._lock.__enter__() def __exit__(self, *args): return self._lock.__exit__(*args) def _make_methods(self): self.acquire = self._lock.acquire self.release = self._lock.release def __repr__(self): try: num_waiters = (self._sleeping_count._semlock._get_value() - self._woken_count._semlock._get_value()) except Exception: num_waiters = 'unkown' return '' % (self._lock, num_waiters) def wait(self, timeout=None): assert self._lock._semlock._is_mine(), \ 'must acquire() condition before using wait()' # indicate that this thread is going to sleep self._sleeping_count.release() # release lock count = self._lock._semlock._count() for i in xrange(count): self._lock.release() try: # wait for notification or timeout self._wait_semaphore.acquire(True, timeout) finally: # indicate that this thread has woken self._woken_count.release() # reacquire lock for i in xrange(count): self._lock.acquire() def notify(self): assert self._lock._semlock._is_mine(), 'lock is not owned' assert not self._wait_semaphore.acquire(False) # to take account of timeouts since last notify() we subtract # woken_count from sleeping_count and rezero woken_count while self._woken_count.acquire(False): res = self._sleeping_count.acquire(False) assert res if self._sleeping_count.acquire(False): # try grabbing a sleeper self._wait_semaphore.release() # wake up one sleeper self._woken_count.acquire() # wait for the sleeper to wake # rezero _wait_semaphore in case a timeout just happened self._wait_semaphore.acquire(False) def notify_all(self): assert self._lock._semlock._is_mine(), 'lock is not owned' assert not self._wait_semaphore.acquire(False) # to take account of timeouts since last notify*() we subtract # woken_count from sleeping_count and rezero woken_count while self._woken_count.acquire(False): res = self._sleeping_count.acquire(False) assert res sleepers = 0 while self._sleeping_count.acquire(False): self._wait_semaphore.release() # wake up one sleeper sleepers += 1 if sleepers: for i in xrange(sleepers): self._woken_count.acquire() # wait for a sleeper to wake # rezero wait_semaphore in case some timeouts just happened while self._wait_semaphore.acquire(False): pass # # Event # class Event(object): def __init__(self): self._cond = Condition(Lock()) self._flag = Semaphore(0) def is_set(self): self._cond.acquire() try: if self._flag.acquire(False): self._flag.release() return True return False finally: self._cond.release() def set(self): 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Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = ['Queue', 'SimpleQueue', 'JoinableQueue'] import sys import os import threading import collections import time import atexit import weakref from Queue import Empty, Full import _multiprocessing from multiprocessing import Pipe from multiprocessing.synchronize import Lock, BoundedSemaphore, Semaphore, Condition from multiprocessing.util import debug, info, Finalize, register_after_fork from multiprocessing.forking import assert_spawning # # Queue type using a pipe, buffer and thread # class Queue(object): def __init__(self, maxsize=0): if maxsize <= 0: maxsize = _multiprocessing.SemLock.SEM_VALUE_MAX self._maxsize = maxsize self._reader, self._writer = Pipe(duplex=False) self._rlock = Lock() self._opid = os.getpid() if sys.platform == 'win32': self._wlock = None else: self._wlock = Lock() self._sem = BoundedSemaphore(maxsize) self._after_fork() if sys.platform != 'win32': register_after_fork(self, Queue._after_fork) def __getstate__(self): assert_spawning(self) return (self._maxsize, self._reader, self._writer, self._rlock, self._wlock, self._sem, self._opid) def __setstate__(self, state): (self._maxsize, self._reader, self._writer, self._rlock, self._wlock, self._sem, self._opid) = state self._after_fork() def _after_fork(self): debug('Queue._after_fork()') self._notempty = threading.Condition(threading.Lock()) self._buffer = collections.deque() self._thread = None self._jointhread = None self._joincancelled = False self._closed = False self._close = None self._send = self._writer.send self._recv = self._reader.recv self._poll = self._reader.poll def put(self, obj, block=True, timeout=None): assert not self._closed if not self._sem.acquire(block, timeout): raise Full self._notempty.acquire() try: if self._thread is None: self._start_thread() self._buffer.append(obj) self._notempty.notify() finally: self._notempty.release() def get(self, block=True, timeout=None): if block and timeout is None: self._rlock.acquire() try: res = self._recv() self._sem.release() return res finally: self._rlock.release() else: if block: deadline = time.time() + timeout if not self._rlock.acquire(block, timeout): raise Empty try: if block: timeout = deadline - time.time() if timeout < 0 or not self._poll(timeout): raise Empty elif not self._poll(): raise Empty res = self._recv() self._sem.release() return res finally: self._rlock.release() def qsize(self): # Raises NotImplementedError on Mac OSX because of broken sem_getvalue() return self._maxsize - self._sem._semlock._get_value() def empty(self): return not self._poll() def full(self): return self._sem._semlock._is_zero() def get_nowait(self): return self.get(False) def put_nowait(self, obj): return self.put(obj, False) def close(self): self._closed = True self._reader.close() if self._close: self._close() def join_thread(self): debug('Queue.join_thread()') assert self._closed if self._jointhread: self._jointhread() def cancel_join_thread(self): debug('Queue.cancel_join_thread()') self._joincancelled = True try: self._jointhread.cancel() except AttributeError: pass def _start_thread(self): debug('Queue._start_thread()') # Start thread which transfers data from buffer to pipe self._buffer.clear() self._thread = threading.Thread( target=Queue._feed, args=(self._buffer, self._notempty, self._send, self._wlock, self._writer.close), name='QueueFeederThread' ) self._thread.daemon = True debug('doing self._thread.start()') self._thread.start() debug('... done self._thread.start()') # On process exit we will wait for data to be flushed to pipe. if not self._joincancelled: self._jointhread = Finalize( self._thread, Queue._finalize_join, [weakref.ref(self._thread)], exitpriority=-5 ) # Send sentinel to the thread queue object when garbage collected self._close = Finalize( self, Queue._finalize_close, [self._buffer, self._notempty], exitpriority=10 ) @staticmethod def _finalize_join(twr): debug('joining queue thread') thread = twr() if thread is not None: thread.join() debug('... queue thread joined') else: debug('... queue thread already dead') @staticmethod def _finalize_close(buffer, notempty): debug('telling queue thread to quit') notempty.acquire() try: buffer.append(_sentinel) notempty.notify() finally: notempty.release() @staticmethod def _feed(buffer, notempty, send, writelock, close): debug('starting thread to feed data to pipe') from .util import is_exiting nacquire = notempty.acquire nrelease = notempty.release nwait = notempty.wait bpopleft = buffer.popleft sentinel = _sentinel if sys.platform != 'win32': wacquire = writelock.acquire wrelease = writelock.release else: wacquire = None try: while 1: nacquire() try: if not buffer: nwait() finally: nrelease() try: while 1: obj = bpopleft() if obj is sentinel: debug('feeder thread got sentinel -- exiting') close() return if wacquire is None: send(obj) else: wacquire() try: send(obj) finally: wrelease() except IndexError: pass except Exception, e: # Since this runs in a daemon thread the resources it uses # may be become unusable while the process is cleaning up. # We ignore errors which happen after the process has # started to cleanup. try: if is_exiting(): info('error in queue thread: %s', e) else: import traceback traceback.print_exc() except Exception: pass _sentinel = object() # # A queue type which also supports join() and task_done() methods # # Note that if you do not call task_done() for each finished task then # eventually the counter's semaphore may overflow causing Bad Things # to happen. # class JoinableQueue(Queue): def __init__(self, maxsize=0): Queue.__init__(self, maxsize) self._unfinished_tasks = Semaphore(0) self._cond = Condition() def __getstate__(self): return Queue.__getstate__(self) + (self._cond, self._unfinished_tasks) def __setstate__(self, state): Queue.__setstate__(self, state[:-2]) self._cond, self._unfinished_tasks = state[-2:] def put(self, obj, block=True, timeout=None): assert not self._closed if not self._sem.acquire(block, timeout): raise Full self._notempty.acquire() self._cond.acquire() try: if self._thread is None: self._start_thread() self._buffer.append(obj) self._unfinished_tasks.release() self._notempty.notify() finally: self._cond.release() self._notempty.release() def task_done(self): self._cond.acquire() try: if not self._unfinished_tasks.acquire(False): raise ValueError('task_done() called too many times') if self._unfinished_tasks._semlock._is_zero(): self._cond.notify_all() finally: self._cond.release() def join(self): self._cond.acquire() try: if not self._unfinished_tasks._semlock._is_zero(): self._cond.wait() finally: self._cond.release() # # Simplified Queue type -- really just a locked pipe # class SimpleQueue(object): def __init__(self): self._reader, self._writer = Pipe(duplex=False) self._rlock = Lock() if sys.platform == 'win32': self._wlock = None else: self._wlock = Lock() self._make_methods() def empty(self): return not self._reader.poll() def __getstate__(self): assert_spawning(self) return (self._reader, self._writer, self._rlock, self._wlock) def __setstate__(self, state): (self._reader, self._writer, self._rlock, self._wlock) = state self._make_methods() def _make_methods(self): recv = self._reader.recv racquire, rrelease = self._rlock.acquire, self._rlock.release def get(): racquire() try: return recv() finally: rrelease() self.get = get if self._wlock is None: # writes to a message oriented win32 pipe are atomic self.put = self._writer.send else: send = self._writer.send wacquire, wrelease = self._wlock.acquire, self._wlock.release def put(obj): wacquire() try: return send(obj) finally: wrelease() self.put = put heap.py000064400000020605147207507420006046 0ustar00# # Module which supports allocation of memory from an mmap # # multiprocessing/heap.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # import bisect import mmap import tempfile import os import sys import threading import itertools import _multiprocessing from multiprocessing.util import Finalize, info from multiprocessing.forking import assert_spawning __all__ = ['BufferWrapper'] # # Inheirtable class which wraps an mmap, and from which blocks can be allocated # if sys.platform == 'win32': from _multiprocessing import win32 class Arena(object): _counter = itertools.count() def __init__(self, size): self.size = size self.name = 'pym-%d-%d' % (os.getpid(), Arena._counter.next()) self.buffer = mmap.mmap(-1, self.size, tagname=self.name) assert win32.GetLastError() == 0, 'tagname already in use' self._state = (self.size, self.name) def __getstate__(self): assert_spawning(self) return self._state def __setstate__(self, state): self.size, self.name = self._state = state self.buffer = mmap.mmap(-1, self.size, tagname=self.name) assert win32.GetLastError() == win32.ERROR_ALREADY_EXISTS else: class Arena(object): def __init__(self, size): self.buffer = mmap.mmap(-1, size) self.size = size self.name = None # # Class allowing allocation of chunks of memory from arenas # class Heap(object): _alignment = 8 def __init__(self, size=mmap.PAGESIZE): self._lastpid = os.getpid() self._lock = threading.Lock() self._size = size self._lengths = [] self._len_to_seq = {} self._start_to_block = {} self._stop_to_block = {} self._allocated_blocks = set() self._arenas = [] # list of pending blocks to free - see free() comment below self._pending_free_blocks = [] @staticmethod def _roundup(n, alignment): # alignment must be a power of 2 mask = alignment - 1 return (n + mask) & ~mask def _malloc(self, size): # returns a large enough block -- it might be much larger i = bisect.bisect_left(self._lengths, size) if i == len(self._lengths): length = self._roundup(max(self._size, size), mmap.PAGESIZE) self._size *= 2 info('allocating a new mmap of length %d', length) arena = Arena(length) self._arenas.append(arena) return (arena, 0, length) else: length = self._lengths[i] seq = self._len_to_seq[length] block = seq.pop() if not seq: del self._len_to_seq[length], self._lengths[i] (arena, start, stop) = block del self._start_to_block[(arena, start)] del self._stop_to_block[(arena, stop)] return block def _free(self, block): # free location and try to merge with neighbours (arena, start, stop) = block try: prev_block = self._stop_to_block[(arena, start)] except KeyError: pass else: start, _ = self._absorb(prev_block) try: next_block = self._start_to_block[(arena, stop)] except KeyError: pass else: _, stop = self._absorb(next_block) block = (arena, start, stop) length = stop - start try: self._len_to_seq[length].append(block) except KeyError: self._len_to_seq[length] = [block] bisect.insort(self._lengths, length) self._start_to_block[(arena, start)] = block self._stop_to_block[(arena, stop)] = block def _absorb(self, block): # deregister this block so it can be merged with a neighbour (arena, start, stop) = block del self._start_to_block[(arena, start)] del self._stop_to_block[(arena, stop)] length = stop - start seq = self._len_to_seq[length] seq.remove(block) if not seq: del self._len_to_seq[length] self._lengths.remove(length) return start, stop def _free_pending_blocks(self): # Free all the blocks in the pending list - called with the lock held. while True: try: block = self._pending_free_blocks.pop() except IndexError: break self._allocated_blocks.remove(block) self._free(block) def free(self, block): # free a block returned by malloc() # Since free() can be called asynchronously by the GC, it could happen # that it's called while self._lock is held: in that case, # self._lock.acquire() would deadlock (issue #12352). To avoid that, a # trylock is used instead, and if the lock can't be acquired # immediately, the block is added to a list of blocks to be freed # synchronously sometimes later from malloc() or free(), by calling # _free_pending_blocks() (appending and retrieving from a list is not # strictly thread-safe but under cPython it's atomic thanks to the GIL). assert os.getpid() == self._lastpid if not self._lock.acquire(False): # can't acquire the lock right now, add the block to the list of # pending blocks to free self._pending_free_blocks.append(block) else: # we hold the lock try: self._free_pending_blocks() self._allocated_blocks.remove(block) self._free(block) finally: self._lock.release() def malloc(self, size): # return a block of right size (possibly rounded up) assert 0 <= size < sys.maxint if os.getpid() != self._lastpid: self.__init__() # reinitialize after fork self._lock.acquire() self._free_pending_blocks() try: size = self._roundup(max(size,1), self._alignment) (arena, start, stop) = self._malloc(size) new_stop = start + size if new_stop < stop: self._free((arena, new_stop, stop)) block = (arena, start, new_stop) self._allocated_blocks.add(block) return block finally: self._lock.release() # # Class representing a chunk of an mmap -- can be inherited # class BufferWrapper(object): _heap = Heap() def __init__(self, size): assert 0 <= size < sys.maxint block = BufferWrapper._heap.malloc(size) self._state = (block, size) Finalize(self, BufferWrapper._heap.free, args=(block,)) def get_address(self): (arena, start, stop), size = self._state address, length = _multiprocessing.address_of_buffer(arena.buffer) assert size <= length return address + start def get_size(self): return self._state[1] forking.pyo000064400000033571147207507420006755 0ustar00 rfc@sddlZddlZddlZddlZddlmZmZddddddgZd Zdd l m Z de fd YZ d Z e j ee je d Ze j eejee j eejeyddlmZWnek rn#XdZdZe j eeejdkrddlZejZejZej Z de!fdYZ"n}ddl#Z#ddl$Z$ddl%Z%ddlZddl&m'Z'm(Z(m)Z)ddlm*Z*ddl m+Z+m,Z,ddZ.dZ/ejdko%e0ede1Z2ej3j4j5dZ6e'j7Ze'j8Z e6rsej9j:ej;da<n ej3a<dZ=de1dZde!fdYZ"dZ>d Z?d!Z@d"ZAd#ZBd$ZCe j e(eCe j e)eCgZDd%ZEdS(&iN(tutiltprocesstPopentassert_spawningtexitt duplicatetclosetForkingPicklercCs,tjs(tdt|jndS(NsF%s objects should only be shared between processes through inheritance(Rtthread_is_spawningt RuntimeErrorttypet__name__(tself((s//usr/lib64/python2.7/multiprocessing/forking.pyR0s (tPicklercBs&eZejjZedZRS(cs fd}||j|siitwb(R1tpipeRtmsvcrtt get_osfhandleR;Rtget_command_linetjoinRdt CreateProcessRaRtCloseR3R0t_handletget_preparation_datat_nametfdopentintRt_tlstprocess_handleR]R\( R R8trfdtwfdtrhandletcmdthpthtR3ttidt prep_datatto_child((s//usr/lib64/python2.7/multiprocessing/forking.pyR:s( -      cCsttjdddk S(NR}(RRR|R(((s//usr/lib64/python2.7/multiprocessing/forking.pyRscCst|tjjS(N(RRR|R}(Ri((s//usr/lib64/python2.7/multiprocessing/forking.pytduplicate_for_childscCs|jdkr|dkr'tj}ntdt|dd}tjt|j|}|tjkrtj |j}|t krt j }n||_qn|jS(Niig?( R0RRdtINFINITEtmaxR{tWaitForSingleObjectRwt WAIT_OBJECT_0tGetExitCodeProcesst TERMINATERQRR(R RJtmsecsRMR9((s//usr/lib64/python2.7/multiprocessing/forking.pyRO"s    cCs|jddS(NRJi(RO(R ((s//usr/lib64/python2.7/multiprocessing/forking.pyRF2scCse|jdkraytjt|jtWqatk r]|jdddkr^q^qaXndS(NRJg?( R0RRdtTerminateProcessR{RwRt WindowsErrorRO(R ((s//usr/lib64/python2.7/multiprocessing/forking.pyRT5s  N(R Rt__doc__tthreadt_localR|R:RWRRRRORFRT(((s//usr/lib64/python2.7/multiprocessing/forking.pyRs  !  cCs.t|dkr&|ddkr&tStSdS(sE Return whether commandline indicates we are forking iis--multiprocessing-forkN(tlenR;RU(targv((s//usr/lib64/python2.7/multiprocessing/forking.pyt is_forkingAs"cCs'ttjr#ttjndS(sM Run code for process object if this in not the main process N(RR,RtmainR(((s//usr/lib64/python2.7/multiprocessing/forking.pytfreeze_supportLscCstttjdtr'tdnttdtrFtjdgSd}tj}t g|d|dgSdS(sR Returns prefix of command line used for spawning a child process t _inheritings Attempt to start a new process before the current process has finished its bootstrapping phase. 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Module providing various facilities to other parts of the package # # multiprocessing/util.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # import itertools import weakref import atexit import threading # we want threading to install it's # cleanup function before multiprocessing does from subprocess import _args_from_interpreter_flags from multiprocessing.process import current_process, active_children __all__ = [ 'sub_debug', 'debug', 'info', 'sub_warning', 'get_logger', 'log_to_stderr', 'get_temp_dir', 'register_after_fork', 'is_exiting', 'Finalize', 'ForkAwareThreadLock', 'ForkAwareLocal', 'SUBDEBUG', 'SUBWARNING', ] # # Logging # NOTSET = 0 SUBDEBUG = 5 DEBUG = 10 INFO = 20 SUBWARNING = 25 LOGGER_NAME = 'multiprocessing' DEFAULT_LOGGING_FORMAT = '[%(levelname)s/%(processName)s] %(message)s' _logger = None _log_to_stderr = False def sub_debug(msg, *args): if _logger: _logger.log(SUBDEBUG, msg, *args) def debug(msg, *args): if _logger: _logger.log(DEBUG, msg, *args) def info(msg, *args): if _logger: _logger.log(INFO, msg, *args) def sub_warning(msg, *args): if _logger: _logger.log(SUBWARNING, msg, *args) def get_logger(): ''' Returns logger used by multiprocessing ''' global _logger import logging, atexit logging._acquireLock() try: if not _logger: _logger = logging.getLogger(LOGGER_NAME) _logger.propagate = 0 logging.addLevelName(SUBDEBUG, 'SUBDEBUG') logging.addLevelName(SUBWARNING, 'SUBWARNING') # XXX multiprocessing should cleanup before logging if hasattr(atexit, 'unregister'): atexit.unregister(_exit_function) atexit.register(_exit_function) else: atexit._exithandlers.remove((_exit_function, (), {})) atexit._exithandlers.append((_exit_function, (), {})) finally: logging._releaseLock() return _logger def log_to_stderr(level=None): ''' Turn on logging and add a handler which prints to stderr ''' global _log_to_stderr import logging logger = get_logger() formatter = logging.Formatter(DEFAULT_LOGGING_FORMAT) handler = logging.StreamHandler() handler.setFormatter(formatter) logger.addHandler(handler) if level: logger.setLevel(level) _log_to_stderr = True return _logger # # Function returning a temp directory which will be removed on exit # def get_temp_dir(): # get name of a temp directory which will be automatically cleaned up if current_process()._tempdir is None: import shutil, tempfile tempdir = tempfile.mkdtemp(prefix='pymp-') info('created temp directory %s', tempdir) Finalize(None, shutil.rmtree, args=[tempdir], exitpriority=-100) current_process()._tempdir = tempdir return current_process()._tempdir # # Support for reinitialization of objects when bootstrapping a child process # _afterfork_registry = weakref.WeakValueDictionary() _afterfork_counter = itertools.count() def _run_after_forkers(): items = list(_afterfork_registry.items()) items.sort() for (index, ident, func), obj in items: try: func(obj) except Exception, e: info('after forker raised exception %s', e) def register_after_fork(obj, func): _afterfork_registry[(_afterfork_counter.next(), id(obj), func)] = obj # # Finalization using weakrefs # _finalizer_registry = {} _finalizer_counter = itertools.count() class Finalize(object): ''' Class which supports object finalization using weakrefs ''' def __init__(self, obj, callback, args=(), kwargs=None, exitpriority=None): assert exitpriority is None or type(exitpriority) is int if obj is not None: self._weakref = weakref.ref(obj, self) else: assert exitpriority is not None self._callback = callback self._args = args self._kwargs = kwargs or {} self._key = (exitpriority, _finalizer_counter.next()) _finalizer_registry[self._key] = self def __call__(self, wr=None): ''' Run the callback unless it has already been called or cancelled ''' try: del _finalizer_registry[self._key] except KeyError: sub_debug('finalizer no longer registered') else: sub_debug('finalizer calling %s with args %s and kwargs %s', self._callback, self._args, self._kwargs) res = self._callback(*self._args, **self._kwargs) self._weakref = self._callback = self._args = \ self._kwargs = self._key = None return res def cancel(self): ''' Cancel finalization of the object ''' try: del _finalizer_registry[self._key] except KeyError: pass else: self._weakref = self._callback = self._args = \ self._kwargs = self._key = None def still_active(self): ''' Return whether this finalizer is still waiting to invoke callback ''' return self._key in _finalizer_registry def __repr__(self): try: obj = self._weakref() except (AttributeError, TypeError): obj = None if obj is None: return '' x = '' def _run_finalizers(minpriority=None): ''' Run all finalizers whose exit priority is not None and at least minpriority Finalizers with highest priority are called first; finalizers with the same priority will be called in reverse order of creation. ''' if _finalizer_registry is None: # This function may be called after this module's globals are # destroyed. See the _exit_function function in this module for more # notes. return if minpriority is None: f = lambda p : p[0][0] is not None else: f = lambda p : p[0][0] is not None and p[0][0] >= minpriority items = [x for x in _finalizer_registry.items() if f(x)] items.sort(reverse=True) for key, finalizer in items: sub_debug('calling %s', finalizer) try: finalizer() except Exception: import traceback traceback.print_exc() if minpriority is None: _finalizer_registry.clear() # # Clean up on exit # def is_exiting(): ''' Returns true if the process is shutting down ''' return _exiting or _exiting is None _exiting = False def _exit_function(info=info, debug=debug, _run_finalizers=_run_finalizers, active_children=active_children, current_process=current_process): # NB: we hold on to references to functions in the arglist due to the # situation described below, where this function is called after this # module's globals are destroyed. global _exiting info('process shutting down') debug('running all "atexit" finalizers with priority >= 0') _run_finalizers(0) if current_process() is not None: # NB: we check if the current process is None here because if # it's None, any call to ``active_children()`` will throw an # AttributeError (active_children winds up trying to get # attributes from util._current_process). This happens in a # variety of shutdown circumstances that are not well-understood # because module-scope variables are not apparently supposed to # be destroyed until after this function is called. However, # they are indeed destroyed before this function is called. See # issues 9775 and 15881. Also related: 4106, 9205, and 9207. for p in active_children(): if p._daemonic: info('calling terminate() for daemon %s', p.name) p._popen.terminate() for p in active_children(): info('calling join() for process %s', p.name) p.join() debug('running the remaining "atexit" finalizers') _run_finalizers() atexit.register(_exit_function) # # Some fork aware types # class ForkAwareThreadLock(object): def __init__(self): self._reset() register_after_fork(self, ForkAwareThreadLock._reset) def _reset(self): self._lock = threading.Lock() self.acquire = self._lock.acquire self.release = self._lock.release class ForkAwareLocal(threading.local): def __init__(self): register_after_fork(self, lambda obj : obj.__dict__.clear()) def __reduce__(self): return type(self), () forking.py000064400000037672147207507420006604 0ustar00# # Module for starting a process object using os.fork() or CreateProcess() # # multiprocessing/forking.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # import os import sys import signal import errno from multiprocessing import util, process __all__ = ['Popen', 'assert_spawning', 'exit', 'duplicate', 'close', 'ForkingPickler'] # # Check that the current thread is spawning a child process # def assert_spawning(self): if not Popen.thread_is_spawning(): raise RuntimeError( '%s objects should only be shared between processes' ' through inheritance' % type(self).__name__ ) # # Try making some callable types picklable # from pickle import Pickler class ForkingPickler(Pickler): dispatch = Pickler.dispatch.copy() @classmethod def register(cls, type, reduce): def dispatcher(self, obj): rv = reduce(obj) self.save_reduce(obj=obj, *rv) cls.dispatch[type] = dispatcher def _reduce_method(m): if m.im_self is None: return getattr, (m.im_class, m.im_func.func_name) else: return getattr, (m.im_self, m.im_func.func_name) ForkingPickler.register(type(ForkingPickler.save), _reduce_method) def _reduce_method_descriptor(m): return getattr, (m.__objclass__, m.__name__) ForkingPickler.register(type(list.append), _reduce_method_descriptor) ForkingPickler.register(type(int.__add__), _reduce_method_descriptor) #def _reduce_builtin_function_or_method(m): # return getattr, (m.__self__, m.__name__) #ForkingPickler.register(type(list().append), _reduce_builtin_function_or_method) #ForkingPickler.register(type(int().__add__), _reduce_builtin_function_or_method) try: from functools import partial except ImportError: pass else: def _reduce_partial(p): return _rebuild_partial, (p.func, p.args, p.keywords or {}) def _rebuild_partial(func, args, keywords): return partial(func, *args, **keywords) ForkingPickler.register(partial, _reduce_partial) # # Unix # if sys.platform != 'win32': import time exit = os._exit duplicate = os.dup close = os.close # # We define a Popen class similar to the one from subprocess, but # whose constructor takes a process object as its argument. # class Popen(object): def __init__(self, process_obj): sys.stdout.flush() sys.stderr.flush() self.returncode = None self.pid = os.fork() if self.pid == 0: if 'random' in sys.modules: import random random.seed() code = process_obj._bootstrap() sys.stdout.flush() sys.stderr.flush() os._exit(code) def poll(self, flag=os.WNOHANG): if self.returncode is None: while True: try: pid, sts = os.waitpid(self.pid, flag) except os.error as e: if e.errno == errno.EINTR: continue # Child process not yet created. See #1731717 # e.errno == errno.ECHILD == 10 return None else: break if pid == self.pid: if os.WIFSIGNALED(sts): self.returncode = -os.WTERMSIG(sts) else: assert os.WIFEXITED(sts) self.returncode = os.WEXITSTATUS(sts) return self.returncode def wait(self, timeout=None): if timeout is None: return self.poll(0) deadline = time.time() + timeout delay = 0.0005 while 1: res = self.poll() if res is not None: break remaining = deadline - time.time() if remaining <= 0: break delay = min(delay * 2, remaining, 0.05) time.sleep(delay) return res def terminate(self): if self.returncode is None: try: os.kill(self.pid, signal.SIGTERM) except OSError, e: if self.wait(timeout=0.1) is None: raise @staticmethod def thread_is_spawning(): return False # # Windows # else: import thread import msvcrt import _subprocess import time from _multiprocessing import win32, Connection, PipeConnection from .util import Finalize #try: # from cPickle import dump, load, HIGHEST_PROTOCOL #except ImportError: from pickle import load, HIGHEST_PROTOCOL def dump(obj, file, protocol=None): ForkingPickler(file, protocol).dump(obj) # # # TERMINATE = 0x10000 WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False)) WINSERVICE = sys.executable.lower().endswith("pythonservice.exe") exit = win32.ExitProcess close = win32.CloseHandle # # _python_exe is the assumed path to the python executable. # People embedding Python want to modify it. # if WINSERVICE: _python_exe = os.path.join(sys.exec_prefix, 'python.exe') else: _python_exe = sys.executable def set_executable(exe): global _python_exe _python_exe = exe # # # def duplicate(handle, target_process=None, inheritable=False): if target_process is None: target_process = _subprocess.GetCurrentProcess() return _subprocess.DuplicateHandle( _subprocess.GetCurrentProcess(), handle, target_process, 0, inheritable, _subprocess.DUPLICATE_SAME_ACCESS ).Detach() # # We define a Popen class similar to the one from subprocess, but # whose constructor takes a process object as its argument. # class Popen(object): ''' Start a subprocess to run the code of a process object ''' _tls = thread._local() def __init__(self, process_obj): # create pipe for communication with child rfd, wfd = os.pipe() # get handle for read end of the pipe and make it inheritable rhandle = duplicate(msvcrt.get_osfhandle(rfd), inheritable=True) os.close(rfd) # start process cmd = get_command_line() + [rhandle] cmd = ' '.join('"%s"' % x for x in cmd) hp, ht, pid, tid = _subprocess.CreateProcess( _python_exe, cmd, None, None, 1, 0, None, None, None ) ht.Close() close(rhandle) # set attributes of self self.pid = pid self.returncode = None self._handle = hp # send information to child prep_data = get_preparation_data(process_obj._name) to_child = os.fdopen(wfd, 'wb') Popen._tls.process_handle = int(hp) try: dump(prep_data, to_child, HIGHEST_PROTOCOL) dump(process_obj, to_child, HIGHEST_PROTOCOL) finally: del Popen._tls.process_handle to_child.close() @staticmethod def thread_is_spawning(): return getattr(Popen._tls, 'process_handle', None) is not None @staticmethod def duplicate_for_child(handle): return duplicate(handle, Popen._tls.process_handle) def wait(self, timeout=None): if self.returncode is None: if timeout is None: msecs = _subprocess.INFINITE else: msecs = max(0, int(timeout * 1000 + 0.5)) res = _subprocess.WaitForSingleObject(int(self._handle), msecs) if res == _subprocess.WAIT_OBJECT_0: code = _subprocess.GetExitCodeProcess(self._handle) if code == TERMINATE: code = -signal.SIGTERM self.returncode = code return self.returncode def poll(self): return self.wait(timeout=0) def terminate(self): if self.returncode is None: try: _subprocess.TerminateProcess(int(self._handle), TERMINATE) except WindowsError: if self.wait(timeout=0.1) is None: raise # # # def is_forking(argv): ''' Return whether commandline indicates we are forking ''' if len(argv) >= 2 and argv[1] == '--multiprocessing-fork': assert len(argv) == 3 return True else: return False def freeze_support(): ''' Run code for process object if this in not the main process ''' if is_forking(sys.argv): main() sys.exit() def get_command_line(): ''' Returns prefix of command line used for spawning a child process ''' if getattr(process.current_process(), '_inheriting', False): raise RuntimeError(''' Attempt to start a new process before the current process has finished its bootstrapping phase. This probably means that you are on Windows and you have forgotten to use the proper idiom in the main module: if __name__ == '__main__': freeze_support() ... The "freeze_support()" line can be omitted if the program is not going to be frozen to produce a Windows executable.''') if getattr(sys, 'frozen', False): return [sys.executable, '--multiprocessing-fork'] else: prog = 'from multiprocessing.forking import main; main()' opts = util._args_from_interpreter_flags() return [_python_exe] + opts + ['-c', prog, '--multiprocessing-fork'] def main(): ''' Run code specifed by data received over pipe ''' assert is_forking(sys.argv) handle = int(sys.argv[-1]) fd = msvcrt.open_osfhandle(handle, os.O_RDONLY) from_parent = os.fdopen(fd, 'rb') process.current_process()._inheriting = True preparation_data = load(from_parent) prepare(preparation_data) self = load(from_parent) process.current_process()._inheriting = False from_parent.close() exitcode = self._bootstrap() exit(exitcode) def get_preparation_data(name): ''' Return info about parent needed by child to unpickle process object ''' from .util import _logger, _log_to_stderr d = dict( name=name, sys_path=sys.path, sys_argv=sys.argv, log_to_stderr=_log_to_stderr, orig_dir=process.ORIGINAL_DIR, authkey=process.current_process().authkey, ) if _logger is not None: d['log_level'] = _logger.getEffectiveLevel() if not WINEXE and not WINSERVICE: main_path = getattr(sys.modules['__main__'], '__file__', None) if not main_path and sys.argv[0] not in ('', '-c'): main_path = sys.argv[0] if main_path is not None: if not os.path.isabs(main_path) and \ process.ORIGINAL_DIR is not None: main_path = os.path.join(process.ORIGINAL_DIR, main_path) d['main_path'] = os.path.normpath(main_path) return d # # Make (Pipe)Connection picklable # def reduce_connection(conn): if not Popen.thread_is_spawning(): raise RuntimeError( 'By default %s objects can only be shared between processes\n' 'using inheritance' % type(conn).__name__ ) return type(conn), (Popen.duplicate_for_child(conn.fileno()), conn.readable, conn.writable) ForkingPickler.register(Connection, reduce_connection) ForkingPickler.register(PipeConnection, reduce_connection) # # Prepare current process # old_main_modules = [] def prepare(data): ''' Try to get current process ready to unpickle process object ''' old_main_modules.append(sys.modules['__main__']) if 'name' in data: process.current_process().name = data['name'] if 'authkey' in data: process.current_process()._authkey = data['authkey'] if 'log_to_stderr' in data and data['log_to_stderr']: util.log_to_stderr() if 'log_level' in data: util.get_logger().setLevel(data['log_level']) if 'sys_path' in data: sys.path = data['sys_path'] if 'sys_argv' in data: sys.argv = data['sys_argv'] if 'dir' in data: os.chdir(data['dir']) if 'orig_dir' in data: process.ORIGINAL_DIR = data['orig_dir'] if 'main_path' in data: main_path = data['main_path'] main_name = os.path.splitext(os.path.basename(main_path))[0] if main_name == '__init__': main_name = os.path.basename(os.path.dirname(main_path)) if main_name != 'ipython': import imp if main_path is None: dirs = None elif os.path.basename(main_path).startswith('__init__.py'): dirs = [os.path.dirname(os.path.dirname(main_path))] else: dirs = [os.path.dirname(main_path)] assert main_name not in sys.modules, main_name file, path_name, etc = imp.find_module(main_name, dirs) try: # We would like to do "imp.load_module('__main__', ...)" # here. However, that would cause 'if __name__ == # "__main__"' clauses to be executed. main_module = imp.load_module( '__parents_main__', file, path_name, etc ) finally: if file: file.close() sys.modules['__main__'] = main_module main_module.__name__ = '__main__' # Try to make the potentially picklable objects in # sys.modules['__main__'] realize they are in the main # module -- somewhat ugly. for obj in main_module.__dict__.values(): try: if obj.__module__ == '__parents_main__': obj.__module__ = '__main__' except Exception: pass sharedctypes.py000064400000017021147207507420007625 0ustar00# # Module which supports allocation of ctypes objects from shared memory # # multiprocessing/sharedctypes.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # import sys import ctypes import weakref from multiprocessing import heap, RLock from multiprocessing.forking import assert_spawning, ForkingPickler __all__ = ['RawValue', 'RawArray', 'Value', 'Array', 'copy', 'synchronized'] # # # typecode_to_type = { 'c': ctypes.c_char, 'u': ctypes.c_wchar, 'b': ctypes.c_byte, 'B': ctypes.c_ubyte, 'h': ctypes.c_short, 'H': ctypes.c_ushort, 'i': ctypes.c_int, 'I': ctypes.c_uint, 'l': ctypes.c_long, 'L': ctypes.c_ulong, 'f': ctypes.c_float, 'd': ctypes.c_double } # # # def _new_value(type_): size = ctypes.sizeof(type_) wrapper = heap.BufferWrapper(size) return rebuild_ctype(type_, wrapper, None) def RawValue(typecode_or_type, *args): ''' Returns a ctypes object allocated from shared memory ''' type_ = typecode_to_type.get(typecode_or_type, typecode_or_type) obj = _new_value(type_) ctypes.memset(ctypes.addressof(obj), 0, ctypes.sizeof(obj)) obj.__init__(*args) return obj def RawArray(typecode_or_type, size_or_initializer): ''' Returns a ctypes array allocated from shared memory ''' type_ = typecode_to_type.get(typecode_or_type, typecode_or_type) if isinstance(size_or_initializer, (int, long)): type_ = type_ * size_or_initializer obj = _new_value(type_) ctypes.memset(ctypes.addressof(obj), 0, ctypes.sizeof(obj)) return obj else: type_ = type_ * len(size_or_initializer) result = _new_value(type_) result.__init__(*size_or_initializer) return result def Value(typecode_or_type, *args, **kwds): ''' Return a synchronization wrapper for a Value ''' lock = kwds.pop('lock', None) if kwds: raise ValueError('unrecognized keyword argument(s): %s' % kwds.keys()) obj = RawValue(typecode_or_type, *args) if lock is False: return obj if lock in (True, None): lock = RLock() if not hasattr(lock, 'acquire'): raise AttributeError("'%r' has no method 'acquire'" % lock) return synchronized(obj, lock) def Array(typecode_or_type, size_or_initializer, **kwds): ''' Return a synchronization wrapper for a RawArray ''' lock = kwds.pop('lock', None) if kwds: raise ValueError('unrecognized keyword argument(s): %s' % kwds.keys()) obj = RawArray(typecode_or_type, size_or_initializer) if lock is False: return obj if lock in (True, None): lock = RLock() if not hasattr(lock, 'acquire'): raise AttributeError("'%r' has no method 'acquire'" % lock) return synchronized(obj, lock) def copy(obj): new_obj = _new_value(type(obj)) ctypes.pointer(new_obj)[0] = obj return new_obj def synchronized(obj, lock=None): assert not isinstance(obj, SynchronizedBase), 'object already synchronized' if isinstance(obj, ctypes._SimpleCData): return Synchronized(obj, lock) elif isinstance(obj, ctypes.Array): if obj._type_ is ctypes.c_char: return SynchronizedString(obj, lock) return SynchronizedArray(obj, lock) else: cls = type(obj) try: scls = class_cache[cls] except KeyError: names = [field[0] for field in cls._fields_] d = dict((name, make_property(name)) for name in names) classname = 'Synchronized' + cls.__name__ scls = class_cache[cls] = type(classname, (SynchronizedBase,), d) return scls(obj, lock) # # Functions for pickling/unpickling # def reduce_ctype(obj): assert_spawning(obj) if isinstance(obj, ctypes.Array): return rebuild_ctype, (obj._type_, obj._wrapper, obj._length_) else: return rebuild_ctype, (type(obj), obj._wrapper, None) def rebuild_ctype(type_, wrapper, length): if length is not None: type_ = type_ * length ForkingPickler.register(type_, reduce_ctype) obj = type_.from_address(wrapper.get_address()) obj._wrapper = wrapper return obj # # Function to create properties # def make_property(name): try: return prop_cache[name] except KeyError: d = {} exec template % ((name,)*7) in d prop_cache[name] = d[name] return d[name] template = ''' def get%s(self): self.acquire() try: return self._obj.%s finally: self.release() def set%s(self, value): self.acquire() try: self._obj.%s = value finally: self.release() %s = property(get%s, set%s) ''' prop_cache = {} class_cache = weakref.WeakKeyDictionary() # # Synchronized wrappers # class SynchronizedBase(object): def __init__(self, obj, lock=None): self._obj = obj self._lock = lock or RLock() self.acquire = self._lock.acquire self.release = self._lock.release def __reduce__(self): assert_spawning(self) return synchronized, (self._obj, self._lock) def get_obj(self): return self._obj def get_lock(self): return self._lock def __repr__(self): return '<%s wrapper for %s>' % (type(self).__name__, self._obj) class Synchronized(SynchronizedBase): value = make_property('value') class SynchronizedArray(SynchronizedBase): def __len__(self): return len(self._obj) def __getitem__(self, i): self.acquire() try: return self._obj[i] finally: self.release() def __setitem__(self, i, value): self.acquire() try: self._obj[i] = value finally: self.release() def __getslice__(self, start, stop): self.acquire() try: return self._obj[start:stop] finally: self.release() def __setslice__(self, start, stop, values): self.acquire() try: self._obj[start:stop] = values finally: self.release() class SynchronizedString(SynchronizedArray): value = make_property('value') raw = make_property('raw') forking.pyc000064400000034030147207507420006730 0ustar00 rfc@sddlZddlZddlZddlZddlmZmZddddddgZd Zdd l m Z de fd YZ d Z e j ee je d Ze j eejee j eejeyddlmZWnek rn#XdZdZe j eeejdkrddlZejZejZej Z de!fdYZ"n}ddl#Z#ddl$Z$ddl%Z%ddlZddl&m'Z'm(Z(m)Z)ddlm*Z*ddl m+Z+m,Z,ddZ.dZ/ejdko%e0ede1Z2ej3j4j5dZ6e'j7Ze'j8Z e6rsej9j:ej;da<n ej3a<dZ=de1dZde!fdYZ"dZ>d Z?d!Z@d"ZAd#ZBd$ZCe j e(eCe j e)eCgZDd%ZEdS(&iN(tutiltprocesstPopentassert_spawningtexitt duplicatetclosetForkingPicklercCs,tjs(tdt|jndS(NsF%s objects should only be shared between processes through inheritance(Rtthread_is_spawningt RuntimeErrorttypet__name__(tself((s//usr/lib64/python2.7/multiprocessing/forking.pyR0s (tPicklercBs&eZejjZedZRS(cs fd}||j|siitwb(R1tpipeRtmsvcrtt get_osfhandleR;Rtget_command_linetjoinRft CreateProcessRcRtCloseR3R0t_handletget_preparation_datat_nametfdopentintRt_tlstprocess_handleR_R^( R R8trfdtwfdtrhandletcmdthpthtR3ttidt prep_datatto_child((s//usr/lib64/python2.7/multiprocessing/forking.pyR:s( -      cCsttjdddk S(NR(RRR~R(((s//usr/lib64/python2.7/multiprocessing/forking.pyRscCst|tjjS(N(RRR~R(Rk((s//usr/lib64/python2.7/multiprocessing/forking.pytduplicate_for_childscCs|jdkr|dkr'tj}ntdt|dd}tjt|j|}|tjkrtj |j}|t krt j }n||_qn|jS(Niig?( R0RRftINFINITEtmaxR}tWaitForSingleObjectRyt WAIT_OBJECT_0tGetExitCodeProcesst TERMINATERSRT(R RLtmsecsROR9((s//usr/lib64/python2.7/multiprocessing/forking.pyRQ"s    cCs|jddS(NRLi(RQ(R ((s//usr/lib64/python2.7/multiprocessing/forking.pyRH2scCse|jdkraytjt|jtWqatk r]|jdddkr^q^qaXndS(NRLg?( R0RRftTerminateProcessR}RyRt WindowsErrorRQ(R ((s//usr/lib64/python2.7/multiprocessing/forking.pyRV5s  N(R Rt__doc__tthreadt_localR~R:RYRRRRQRHRV(((s//usr/lib64/python2.7/multiprocessing/forking.pyRs  !  cCsFt|dkr>|ddkr>t|dks:ttStSdS(sE Return whether commandline indicates we are forking iis--multiprocessing-forkiN(tlenRCR;RW(targv((s//usr/lib64/python2.7/multiprocessing/forking.pyt is_forkingAs"cCs'ttjr#ttjndS(sM Run code for process object if this in not the main process N(RR,RtmainR(((s//usr/lib64/python2.7/multiprocessing/forking.pytfreeze_supportLscCstttjdtr'tdnttdtrFtjdgSd}tj}t g|d|dgSdS(sR Returns prefix of command line used for spawning a child process t _inheritings Attempt to start a new process before the current process has finished its bootstrapping phase. This probably means that you are on Windows and you have forgotten to use the proper idiom in the main module: if __name__ == '__main__': freeze_support() ... 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Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = ['Process', 'current_process', 'active_children'] # # Imports # import os import sys import signal import itertools # # # try: ORIGINAL_DIR = os.path.abspath(os.getcwd()) except OSError: ORIGINAL_DIR = None # # Public functions # def current_process(): ''' Return process object representing the current process ''' return _current_process def active_children(): ''' Return list of process objects corresponding to live child processes ''' _cleanup() return list(_current_process._children) # # # def _cleanup(): # check for processes which have finished for p in list(_current_process._children): if p._popen.poll() is not None: _current_process._children.discard(p) # # The `Process` class # class Process(object): ''' Process objects represent activity that is run in a separate process The class is analagous to `threading.Thread` ''' _Popen = None def __init__(self, group=None, target=None, name=None, args=(), kwargs={}): assert group is None, 'group argument must be None for now' count = _current_process._counter.next() self._identity = _current_process._identity + (count,) self._authkey = _current_process._authkey self._daemonic = _current_process._daemonic self._tempdir = _current_process._tempdir self._parent_pid = os.getpid() self._popen = None self._target = target self._args = tuple(args) self._kwargs = dict(kwargs) self._name = name or type(self).__name__ + '-' + \ ':'.join(str(i) for i in self._identity) def run(self): ''' Method to be run in sub-process; can be overridden in sub-class ''' if self._target: self._target(*self._args, **self._kwargs) def start(self): ''' Start child process ''' assert self._popen is None, 'cannot start a process twice' assert self._parent_pid == os.getpid(), \ 'can only start a process object created by current process' assert not _current_process._daemonic, \ 'daemonic processes are not allowed to have children' _cleanup() if self._Popen is not None: Popen = self._Popen else: from .forking import Popen self._popen = Popen(self) _current_process._children.add(self) def terminate(self): ''' Terminate process; sends SIGTERM signal or uses TerminateProcess() ''' self._popen.terminate() def join(self, timeout=None): ''' Wait until child process terminates ''' assert self._parent_pid == os.getpid(), 'can only join a child process' assert self._popen is not None, 'can only join a started process' res = self._popen.wait(timeout) if res is not None: _current_process._children.discard(self) def is_alive(self): ''' Return whether process is alive ''' if self is _current_process: return True assert self._parent_pid == os.getpid(), 'can only test a child process' if self._popen is None: return False self._popen.poll() return self._popen.returncode is None @property def name(self): return self._name @name.setter def name(self, name): assert isinstance(name, basestring), 'name must be a string' self._name = name @property def daemon(self): ''' Return whether process is a daemon ''' return self._daemonic @daemon.setter def daemon(self, daemonic): ''' Set whether process is a daemon ''' assert self._popen is None, 'process has already started' self._daemonic = daemonic @property def authkey(self): return self._authkey @authkey.setter def authkey(self, authkey): ''' Set authorization key of process ''' self._authkey = AuthenticationString(authkey) @property def exitcode(self): ''' Return exit code of process or `None` if it has yet to stop ''' if self._popen is None: return self._popen return self._popen.poll() @property def ident(self): ''' Return identifier (PID) of process or `None` if it has yet to start ''' if self is _current_process: return os.getpid() else: return self._popen and self._popen.pid pid = ident def __repr__(self): if self is _current_process: status = 'started' elif self._parent_pid != os.getpid(): status = 'unknown' elif self._popen is None: status = 'initial' else: if self._popen.poll() is not None: status = self.exitcode else: status = 'started' if type(status) is int: if status == 0: status = 'stopped' else: status = 'stopped[%s]' % _exitcode_to_name.get(status, status) return '<%s(%s, %s%s)>' % (type(self).__name__, self._name, status, self._daemonic and ' daemon' or '') ## def _bootstrap(self): from . import util global _current_process try: self._children = set() self._counter = itertools.count(1) try: sys.stdin.close() sys.stdin = open(os.devnull) except (OSError, ValueError): pass _current_process = self util._finalizer_registry.clear() util._run_after_forkers() util.info('child process calling self.run()') try: self.run() exitcode = 0 finally: util._exit_function() except SystemExit, e: if not e.args: exitcode = 1 elif isinstance(e.args[0], int): exitcode = e.args[0] else: sys.stderr.write(str(e.args[0]) + '\n') sys.stderr.flush() exitcode = 0 if isinstance(e.args[0], str) else 1 except: exitcode = 1 import traceback sys.stderr.write('Process %s:\n' % self.name) sys.stderr.flush() traceback.print_exc() util.info('process exiting with exitcode %d' % exitcode) return exitcode # # We subclass bytes to avoid accidental transmission of auth keys over network # class AuthenticationString(bytes): def __reduce__(self): from .forking import Popen if not Popen.thread_is_spawning(): raise TypeError( 'Pickling an AuthenticationString object is ' 'disallowed for security reasons' ) return AuthenticationString, (bytes(self),) # # Create object representing the main process # class _MainProcess(Process): def __init__(self): self._identity = () self._daemonic = False self._name = 'MainProcess' self._parent_pid = None self._popen = None self._counter = itertools.count(1) self._children = set() self._authkey = AuthenticationString(os.urandom(32)) self._tempdir = None _current_process = _MainProcess() del _MainProcess # # Give names to some return codes # _exitcode_to_name = {} for name, signum in signal.__dict__.items(): if name[:3]=='SIG' and '_' not in name: _exitcode_to_name[-signum] = name synchronize.pyc000064400000025510147207507420007647 0ustar00 rfc@sddddddgZddlZddlZddlZddlmZmZddlZdd l m Z dd l m Z m Z mZdd lmZmZydd lmZWn)ek red dddnXed\ZZejjZdefdYZdefdYZdefdYZdefdYZdefdYZdefdYZdefdYZdS(tLocktRLockt SemaphoretBoundedSemaphoret ConditiontEventiN(ttimetsleep(tcurrent_process(tFinalizetregister_after_forktdebug(tassert_spawningtPopen(tSemLocks*This platform lacks a functioning sem_opens( implementation, therefore, the requireds+ synchronization primitives 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for the API of the multiprocessing package using threads # # multiprocessing/dummy/__init__.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [ 'Process', 'current_process', 'active_children', 'freeze_support', 'Lock', 'RLock', 'Semaphore', 'BoundedSemaphore', 'Condition', 'Event', 'Queue', 'Manager', 'Pipe', 'Pool', 'JoinableQueue' ] # # Imports # import threading import sys import weakref import array import itertools from multiprocessing import TimeoutError, cpu_count from multiprocessing.dummy.connection import Pipe from threading import Lock, RLock, Semaphore, BoundedSemaphore from threading import Event from Queue import Queue # # # class DummyProcess(threading.Thread): def __init__(self, group=None, target=None, name=None, args=(), kwargs={}): threading.Thread.__init__(self, group, target, name, args, kwargs) self._pid = None self._children = weakref.WeakKeyDictionary() self._start_called = False self._parent = current_process() def start(self): assert self._parent is current_process() self._start_called = True if hasattr(self._parent, '_children'): self._parent._children[self] = None threading.Thread.start(self) @property def exitcode(self): if self._start_called and not self.is_alive(): return 0 else: return None # # # class Condition(threading._Condition): notify_all = threading._Condition.notify_all.im_func # # # Process = DummyProcess current_process = threading.current_thread current_process()._children = weakref.WeakKeyDictionary() def active_children(): children = current_process()._children for p in list(children): if not p.is_alive(): children.pop(p, None) return list(children) def freeze_support(): pass # # # class Namespace(object): def __init__(self, **kwds): self.__dict__.update(kwds) def __repr__(self): items = self.__dict__.items() temp = [] for name, value in items: if not name.startswith('_'): temp.append('%s=%r' % (name, value)) temp.sort() return 'Namespace(%s)' % str.join(', ', temp) dict = dict list = list def Array(typecode, sequence, lock=True): return array.array(typecode, sequence) class Value(object): def __init__(self, typecode, value, lock=True): self._typecode = typecode self._value = value def _get(self): return self._value def _set(self, value): self._value = value value = property(_get, _set) def __repr__(self): return '<%r(%r, %r)>'%(type(self).__name__,self._typecode,self._value) def Manager(): return sys.modules[__name__] def shutdown(): pass def Pool(processes=None, initializer=None, initargs=()): from multiprocessing.pool import ThreadPool return ThreadPool(processes, initializer, initargs) JoinableQueue = Queue 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tjtS(N(tsystmodulesR((((s6/usr/lib64/python2.7/multiprocessing/dummy/__init__.pyR scCsdS(N((((s6/usr/lib64/python2.7/multiprocessing/dummy/__init__.pytshutdownscCs ddlm}||||S(Ni(t ThreadPool(tmultiprocessing.poolRN(t processest initializertinitargsRN((s6/usr/lib64/python2.7/multiprocessing/dummy/__init__.pyR s(((t__all__RRKRR@t itertoolstmultiprocessingRRt multiprocessing.dummy.connectionR RRRRR R RRR+RRtcurrent_threadRRRRRtobjectR2tdictR.R#RDRER RMRR R(((s6/usr/lib64/python2.7/multiprocessing/dummy/__init__.pyt$s8      "       dummy/connection.py000064400000005367147207507420010433 0ustar00# # Analogue of `multiprocessing.connection` which uses queues instead of sockets # # multiprocessing/dummy/connection.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [ 'Client', 'Listener', 'Pipe' ] from Queue import Queue families = [None] class Listener(object): def __init__(self, address=None, family=None, backlog=1): self._backlog_queue = Queue(backlog) def accept(self): return Connection(*self._backlog_queue.get()) def close(self): self._backlog_queue = None address = property(lambda self: self._backlog_queue) def Client(address): _in, _out = Queue(), Queue() address.put((_out, _in)) return Connection(_in, _out) def Pipe(duplex=True): a, b = Queue(), Queue() return Connection(a, b), Connection(b, a) class Connection(object): def __init__(self, _in, _out): self._out = _out self._in = _in self.send = self.send_bytes = _out.put self.recv = self.recv_bytes = _in.get def poll(self, timeout=0.0): if self._in.qsize() > 0: return True if timeout <= 0.0: return False self._in.not_empty.acquire() self._in.not_empty.wait(timeout) self._in.not_empty.release() return self._in.qsize() > 0 def close(self): pass util.pyc000064400000023346147207507420006256 0ustar00 rfc@sddlZddlZddlZddlZddlmZddlmZmZdddddd d d d d ddddgZ dZ dZ dZ dZ dZdZdZdaeadZdZdZdZdZddZdZejZejZd Z d!Z!iZ"ejZ#d e$fd"YZ%dd#Z&d$Z'ea(eee&eed%Z)ej*e)de$fd&YZ+dej,fd'YZ-dS((iN(t_args_from_interpreter_flags(tcurrent_processtactive_childrent sub_debugtdebugtinfot sub_warningt get_loggert log_to_stderrt get_temp_dirtregister_after_forkt is_exitingtFinalizetForkAwareThreadLocktForkAwareLocaltSUBDEBUGt SUBWARNINGiii iitmultiprocessings+[%(levelname)s/%(processName)s] %(message)scGs trtjt||ndS(N(t_loggertlogR(tmsgtargs((s,/usr/lib64/python2.7/multiprocessing/util.pyRCscGs trtjt||ndS(N(RRtDEBUG(RR((s,/usr/lib64/python2.7/multiprocessing/util.pyRGscGs trtjt||ndS(N(RRtINFO(RR((s,/usr/lib64/python2.7/multiprocessing/util.pyRKscGs trtjt||ndS(N(RRR(RR((s,/usr/lib64/python2.7/multiprocessing/util.pyROscCsddl}ddl}|jzts|jtadt_|jtd|jt dt |dr|j t |j t q|jjt dif|jjt difnWd|jXtS( s0 Returns logger used by multiprocessing iNiRRt unregister(((tloggingtatexitt _acquireLockRt getLoggert LOGGER_NAMEt propagatet addLevelNameRRthasattrRt_exit_functiontregistert _exithandlerstremovetappendt _releaseLock(RR((s,/usr/lib64/python2.7/multiprocessing/util.pyRSs     cCsjddl}t}|jt}|j}|j||j||r`|j|nta t S(sB Turn on logging and add a handler which prints to stderr iN( RRt FormattertDEFAULT_LOGGING_FORMATt StreamHandlert setFormattert addHandlertsetLeveltTruet_log_to_stderrR(tlevelRtloggert formatterthandler((s,/usr/lib64/python2.7/multiprocessing/util.pyRps     cCstjdkrwddl}ddl}|jdd}td|td|jd|gdd|t_ntjS(Nitprefixspymp-screated temp directory %sRt exitpriorityi( Rt_tempdirtNonetshutilttempfiletmkdtempRR trmtree(R7R8ttempdir((s,/usr/lib64/python2.7/multiprocessing/util.pyR s cCsqttj}|jxN|D]F\\}}}}y||Wq#tk rh}td|q#Xq#WdS(Ns after forker raised exception %s(tlistt_afterfork_registrytitemstsortt ExceptionR(R>tindextidenttfunctobjte((s,/usr/lib64/python2.7/multiprocessing/util.pyt_run_after_forkerss cCs#|ttjt||fs( ROtAttributeErrort TypeErrorR6tgetattrRPRQtstrRRRT(RVRDtx((s,/usr/lib64/python2.7/multiprocessing/util.pyt__repr__s    (N( R`t __module__t__doc__R6RYR]R^R_Rg(((s,/usr/lib64/python2.7/multiprocessing/util.pyR s   cstdkrdSdkr(d}nfd}gtjD]}||rD|^qD}|jdtxV|D]N\}}td|y |Wqytk rddl}|jqyXqyWdkrtj ndS(s Run all finalizers whose exit priority is not None and at least minpriority Finalizers with highest priority are called first; finalizers with the same priority will be called in reverse order of creation. 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(R$R%R&(((s0/usr/lib64/python2.7/multiprocessing/managers.pyR?s tQueuet JoinableQueuetEventtLockR[t SemaphoretBoundedSemaphoret ConditionRRRRRR(Ut__all__tosRtweakrefRZRRMRRtmultiprocessingRRRRR R tmultiprocessing.processR tmultiprocessing.forkingR R RRtmultiprocessing.utilRRtcPickleRt ImportErrorRRRR@R2R;t view_typesR%RR1R*RsR5RBRDRERR_R`t XmlListenert XmlClientRURRRRRR RWRhRR RRRRRRR!R(R)R=R?RCRDRRRORPR[RQRRRSRRR(((s0/usr/lib64/python2.7/multiprocessing/managers.pyt$s      ."  4  ,                 connection.py000064400000035065147207507420007276 0ustar00# # A higher level module for using sockets (or Windows named pipes) # # multiprocessing/connection.py # # Copyright (c) 2006-2008, R Oudkerk # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # 3. Neither the name of author nor the names of any contributors may be # used to endorse or promote products derived from this software # without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # __all__ = [ 'Client', 'Listener', 'Pipe' ] import os import sys import socket import errno import time import tempfile import itertools import _multiprocessing from multiprocessing import current_process, AuthenticationError from multiprocessing.util import get_temp_dir, Finalize, sub_debug, debug from multiprocessing.forking import duplicate, close # # # BUFSIZE = 8192 # A very generous timeout when it comes to local connections... CONNECTION_TIMEOUT = 20. # The hmac module implicitly defaults to using MD5. # Support using a stronger algorithm for the challenge/response code: HMAC_DIGEST_NAME='sha256' _mmap_counter = itertools.count() default_family = 'AF_INET' families = ['AF_INET'] if hasattr(socket, 'AF_UNIX'): default_family = 'AF_UNIX' families += ['AF_UNIX'] if sys.platform == 'win32': default_family = 'AF_PIPE' families += ['AF_PIPE'] def _init_timeout(timeout=CONNECTION_TIMEOUT): return time.time() + timeout def _check_timeout(t): return time.time() > t # # # def arbitrary_address(family): ''' Return an arbitrary free address for the given family ''' if family == 'AF_INET': return ('localhost', 0) elif family == 'AF_UNIX': return tempfile.mktemp(prefix='listener-', dir=get_temp_dir()) elif family == 'AF_PIPE': return tempfile.mktemp(prefix=r'\\.\pipe\pyc-%d-%d-' % (os.getpid(), _mmap_counter.next())) else: raise ValueError('unrecognized family') def address_type(address): ''' Return the types of the address This can be 'AF_INET', 'AF_UNIX', or 'AF_PIPE' ''' if type(address) == tuple: return 'AF_INET' elif type(address) is str and address.startswith('\\\\'): return 'AF_PIPE' elif type(address) is str: return 'AF_UNIX' else: raise ValueError('address type of %r unrecognized' % address) # # Public functions # class Listener(object): ''' Returns a listener object. This is a wrapper for a bound socket which is 'listening' for connections, or for a Windows named pipe. ''' def __init__(self, address=None, family=None, backlog=1, authkey=None): family = family or (address and address_type(address)) \ or default_family address = address or arbitrary_address(family) if family == 'AF_PIPE': self._listener = PipeListener(address, backlog) else: self._listener = SocketListener(address, family, backlog) if authkey is not None and not isinstance(authkey, bytes): raise TypeError, 'authkey should be a byte string' self._authkey = authkey def accept(self): ''' Accept a connection on the bound socket or named pipe of `self`. Returns a `Connection` object. ''' c = self._listener.accept() if self._authkey: deliver_challenge(c, self._authkey) answer_challenge(c, self._authkey) return c def close(self): ''' Close the bound socket or named pipe of `self`. ''' return self._listener.close() address = property(lambda self: self._listener._address) last_accepted = property(lambda self: self._listener._last_accepted) def Client(address, family=None, authkey=None): ''' Returns a connection to the address of a `Listener` ''' family = family or address_type(address) if family == 'AF_PIPE': c = PipeClient(address) else: c = SocketClient(address) if authkey is not None and not isinstance(authkey, bytes): raise TypeError, 'authkey should be a byte string' if authkey is not None: answer_challenge(c, authkey) deliver_challenge(c, authkey) return c if sys.platform != 'win32': def Pipe(duplex=True): ''' Returns pair of connection objects at either end of a pipe ''' if duplex: s1, s2 = socket.socketpair() s1.setblocking(True) s2.setblocking(True) c1 = _multiprocessing.Connection(os.dup(s1.fileno())) c2 = _multiprocessing.Connection(os.dup(s2.fileno())) s1.close() s2.close() else: fd1, fd2 = os.pipe() c1 = _multiprocessing.Connection(fd1, writable=False) c2 = _multiprocessing.Connection(fd2, readable=False) return c1, c2 else: from _multiprocessing import win32 def Pipe(duplex=True): ''' Returns pair of connection objects at either end of a pipe ''' address = arbitrary_address('AF_PIPE') if duplex: openmode = win32.PIPE_ACCESS_DUPLEX access = win32.GENERIC_READ | win32.GENERIC_WRITE obsize, ibsize = BUFSIZE, BUFSIZE else: openmode = win32.PIPE_ACCESS_INBOUND access = win32.GENERIC_WRITE obsize, ibsize = 0, BUFSIZE h1 = win32.CreateNamedPipe( address, openmode, win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, 1, obsize, ibsize, win32.NMPWAIT_WAIT_FOREVER, win32.NULL ) h2 = win32.CreateFile( address, access, 0, win32.NULL, win32.OPEN_EXISTING, 0, win32.NULL ) win32.SetNamedPipeHandleState( h2, win32.PIPE_READMODE_MESSAGE, None, None ) try: win32.ConnectNamedPipe(h1, win32.NULL) except WindowsError, e: if e.args[0] != win32.ERROR_PIPE_CONNECTED: raise c1 = _multiprocessing.PipeConnection(h1, writable=duplex) c2 = _multiprocessing.PipeConnection(h2, readable=duplex) return c1, c2 # # Definitions for connections based on sockets # class SocketListener(object): ''' Representation of a socket which is bound to an address and listening ''' def __init__(self, address, family, backlog=1): self._socket = socket.socket(getattr(socket, family)) try: self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) self._socket.setblocking(True) self._socket.bind(address) self._socket.listen(backlog) self._address = self._socket.getsockname() except socket.error: self._socket.close() raise self._family = family self._last_accepted = None if family == 'AF_UNIX': self._unlink = Finalize( self, os.unlink, args=(address,), exitpriority=0 ) else: self._unlink = None def accept(self): while True: try: s, self._last_accepted = self._socket.accept() except socket.error as e: if e.args[0] != errno.EINTR: raise else: break s.setblocking(True) fd = duplicate(s.fileno()) conn = _multiprocessing.Connection(fd) s.close() return conn def close(self): self._socket.close() if self._unlink is not None: self._unlink() def SocketClient(address): ''' Return a connection object connected to the socket given by `address` ''' family = address_type(address) s = socket.socket( getattr(socket, family) ) s.setblocking(True) t = _init_timeout() while 1: try: s.connect(address) except socket.error, e: if e.args[0] != errno.ECONNREFUSED or _check_timeout(t): debug('failed to connect to address %s', address) raise time.sleep(0.01) else: break else: raise fd = duplicate(s.fileno()) conn = _multiprocessing.Connection(fd) s.close() return conn # # Definitions for connections based on named pipes # if sys.platform == 'win32': class PipeListener(object): ''' Representation of a named pipe ''' def __init__(self, address, backlog=None): self._address = address handle = win32.CreateNamedPipe( address, win32.PIPE_ACCESS_DUPLEX, win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE, BUFSIZE, win32.NMPWAIT_WAIT_FOREVER, win32.NULL ) self._handle_queue = [handle] self._last_accepted = None sub_debug('listener created with address=%r', self._address) self.close = Finalize( self, PipeListener._finalize_pipe_listener, args=(self._handle_queue, self._address), exitpriority=0 ) def accept(self): newhandle = win32.CreateNamedPipe( self._address, win32.PIPE_ACCESS_DUPLEX, win32.PIPE_TYPE_MESSAGE | win32.PIPE_READMODE_MESSAGE | win32.PIPE_WAIT, win32.PIPE_UNLIMITED_INSTANCES, BUFSIZE, BUFSIZE, win32.NMPWAIT_WAIT_FOREVER, win32.NULL ) self._handle_queue.append(newhandle) handle = self._handle_queue.pop(0) try: win32.ConnectNamedPipe(handle, win32.NULL) except WindowsError, e: # ERROR_NO_DATA can occur if a client has already connected, # written data and then disconnected -- see Issue 14725. if e.args[0] not in (win32.ERROR_PIPE_CONNECTED, win32.ERROR_NO_DATA): raise return _multiprocessing.PipeConnection(handle) @staticmethod def _finalize_pipe_listener(queue, address): sub_debug('closing listener with address=%r', address) for handle in queue: close(handle) def PipeClient(address): ''' Return a connection object connected to the pipe given by `address` ''' t = _init_timeout() while 1: try: win32.WaitNamedPipe(address, 1000) h = win32.CreateFile( address, win32.GENERIC_READ | win32.GENERIC_WRITE, 0, win32.NULL, win32.OPEN_EXISTING, 0, win32.NULL ) except WindowsError, e: if e.args[0] not in (win32.ERROR_SEM_TIMEOUT, win32.ERROR_PIPE_BUSY) or _check_timeout(t): raise else: break else: raise win32.SetNamedPipeHandleState( h, win32.PIPE_READMODE_MESSAGE, None, None ) return _multiprocessing.PipeConnection(h) # # Authentication stuff # MESSAGE_LENGTH = 20 CHALLENGE = b'#CHALLENGE#' WELCOME = b'#WELCOME#' FAILURE = b'#FAILURE#' def get_digestmod_for_hmac(): import hashlib return getattr(hashlib, HMAC_DIGEST_NAME) def deliver_challenge(connection, authkey): import hmac assert isinstance(authkey, bytes) message = os.urandom(MESSAGE_LENGTH) connection.send_bytes(CHALLENGE + message) digest = hmac.new(authkey, message, get_digestmod_for_hmac()).digest() response = connection.recv_bytes(256) # reject large message if response == digest: connection.send_bytes(WELCOME) else: connection.send_bytes(FAILURE) raise AuthenticationError('digest received was wrong') def answer_challenge(connection, authkey): import hmac assert isinstance(authkey, bytes) message = connection.recv_bytes(256) # reject large message assert message[:len(CHALLENGE)] == CHALLENGE, 'message = %r' % message message = message[len(CHALLENGE):] digest = hmac.new(authkey, message, get_digestmod_for_hmac()).digest() connection.send_bytes(digest) response = connection.recv_bytes(256) # reject large message if response != WELCOME: raise AuthenticationError('digest sent was rejected') # # Support for using xmlrpclib for serialization # class ConnectionWrapper(object): def __init__(self, conn, dumps, loads): self._conn = conn self._dumps = dumps self._loads = loads for attr in ('fileno', 'close', 'poll', 'recv_bytes', 'send_bytes'): obj = getattr(conn, attr) setattr(self, attr, obj) def send(self, obj): s = self._dumps(obj) self._conn.send_bytes(s) def recv(self): s = self._conn.recv_bytes() return self._loads(s) def _xml_dumps(obj): return xmlrpclib.dumps((obj,), None, None, None, 1).encode('utf8') def _xml_loads(s): (obj,), method = xmlrpclib.loads(s.decode('utf8')) return obj class XmlListener(Listener): def accept(self): global xmlrpclib import xmlrpclib obj = Listener.accept(self) return ConnectionWrapper(obj, _xml_dumps, _xml_loads) def XmlClient(*args, **kwds): global xmlrpclib import xmlrpclib return ConnectionWrapper(Client(*args, **kwds), _xml_dumps, _xml_loads) popen_forkserver.py000064400000003644147221272370010525 0ustar00import io import os from .context import reduction, set_spawning_popen if not reduction.HAVE_SEND_HANDLE: raise ImportError('No support for sending fds between processes') from . import forkserver from . import popen_fork from . import spawn from . import util __all__ = ['Popen'] # # Wrapper for an fd used while launching a process # class _DupFd(object): def __init__(self, ind): self.ind = ind def detach(self): return forkserver.get_inherited_fds()[self.ind] # # Start child process using a server process # class Popen(popen_fork.Popen): method = 'forkserver' DupFd = _DupFd def __init__(self, process_obj): self._fds = [] super().__init__(process_obj) def duplicate_for_child(self, fd): self._fds.append(fd) return len(self._fds) - 1 def _launch(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) buf = io.BytesIO() set_spawning_popen(self) try: reduction.dump(prep_data, buf) reduction.dump(process_obj, buf) finally: set_spawning_popen(None) self.sentinel, w = forkserver.connect_to_new_process(self._fds) util.Finalize(self, os.close, (self.sentinel,)) with open(w, 'wb', closefd=True) as f: f.write(buf.getbuffer()) self.pid = forkserver.read_unsigned(self.sentinel) def poll(self, flag=os.WNOHANG): if self.returncode is None: from multiprocessing.connection import wait timeout = 0 if flag == os.WNOHANG else None if not wait([self.sentinel], timeout): return None try: self.returncode = forkserver.read_unsigned(self.sentinel) except (OSError, EOFError): # The process ended abnormally perhaps because of a signal self.returncode = 255 return self.returncode popen_fork.py000064400000004403147221272370007270 0ustar00import os import sys import signal from . import util __all__ = ['Popen'] # # Start child process using fork # class Popen(object): method = 'fork' def __init__(self, process_obj): util._flush_std_streams() self.returncode = None self._launch(process_obj) def duplicate_for_child(self, fd): return fd def poll(self, flag=os.WNOHANG): if self.returncode is None: while True: try: pid, sts = os.waitpid(self.pid, flag) except OSError as e: # Child process not yet created. See #1731717 # e.errno == errno.ECHILD == 10 return None else: break if pid == self.pid: if os.WIFSIGNALED(sts): self.returncode = -os.WTERMSIG(sts) else: assert os.WIFEXITED(sts) self.returncode = os.WEXITSTATUS(sts) return self.returncode def wait(self, timeout=None): if self.returncode is None: if timeout is not None: from multiprocessing.connection import wait if not wait([self.sentinel], timeout): return None # This shouldn't block if wait() returned successfully. return self.poll(os.WNOHANG if timeout == 0.0 else 0) return self.returncode def terminate(self): if self.returncode is None: try: os.kill(self.pid, signal.SIGTERM) except ProcessLookupError: pass except OSError: if self.wait(timeout=0.1) is None: raise def _launch(self, process_obj): code = 1 parent_r, child_w = os.pipe() self.pid = os.fork() if self.pid == 0: try: os.close(parent_r) if 'random' in sys.modules: import random random.seed() code = process_obj._bootstrap() finally: os._exit(code) else: os.close(child_w) util.Finalize(self, os.close, (parent_r,)) self.sentinel = parent_r semaphore_tracker.py000064400000012422147221272370010624 0ustar00# # On Unix we run a server process which keeps track of unlinked # semaphores. The server ignores SIGINT and SIGTERM and reads from a # pipe. Every other process of the program has a copy of the writable # end of the pipe, so we get EOF when all other processes have exited. # Then the server process unlinks any remaining semaphore names. # # This is important because the system only supports a limited number # of named semaphores, and they will not be automatically removed till # the next reboot. Without this semaphore tracker process, "killall # python" would probably leave unlinked semaphores. # import os import signal import sys import threading import warnings import _multiprocessing from . import spawn from . import util __all__ = ['ensure_running', 'register', 'unregister'] class SemaphoreTracker(object): def __init__(self): self._lock = threading.Lock() self._fd = None self._pid = None def getfd(self): self.ensure_running() return self._fd def ensure_running(self): '''Make sure that semaphore tracker process is running. This can be run from any process. Usually a child process will use the semaphore created by its parent.''' with self._lock: if self._pid is not None: # semaphore tracker was launched before, is it still running? pid, status = os.waitpid(self._pid, os.WNOHANG) if not pid: # => still alive return # => dead, launch it again os.close(self._fd) self._fd = None self._pid = None warnings.warn('semaphore_tracker: process died unexpectedly, ' 'relaunching. Some semaphores might leak.') fds_to_pass = [] try: fds_to_pass.append(sys.stderr.fileno()) except Exception: pass cmd = 'from multiprocessing.semaphore_tracker import main;main(%d)' r, w = os.pipe() try: fds_to_pass.append(r) # process will out live us, so no need to wait on pid exe = spawn.get_executable() args = [exe] + util._args_from_interpreter_flags() args += ['-c', cmd % r] pid = util.spawnv_passfds(exe, args, fds_to_pass) except: os.close(w) raise else: self._fd = w self._pid = pid finally: os.close(r) def register(self, name): '''Register name of semaphore with semaphore tracker.''' self._send('REGISTER', name) def unregister(self, name): '''Unregister name of semaphore with semaphore tracker.''' self._send('UNREGISTER', name) def _send(self, cmd, name): self.ensure_running() msg = '{0}:{1}\n'.format(cmd, name).encode('ascii') if len(name) > 512: # posix guarantees that writes to a pipe of less than PIPE_BUF # bytes are atomic, and that PIPE_BUF >= 512 raise ValueError('name too long') nbytes = os.write(self._fd, msg) assert nbytes == len(msg) _semaphore_tracker = SemaphoreTracker() ensure_running = _semaphore_tracker.ensure_running register = _semaphore_tracker.register unregister = _semaphore_tracker.unregister getfd = _semaphore_tracker.getfd def main(fd): '''Run semaphore tracker.''' # protect the process from ^C and "killall python" etc signal.signal(signal.SIGINT, signal.SIG_IGN) signal.signal(signal.SIGTERM, signal.SIG_IGN) for f in (sys.stdin, sys.stdout): try: f.close() except Exception: pass cache = set() try: # keep track of registered/unregistered semaphores with open(fd, 'rb') as f: for line in f: try: cmd, name = line.strip().split(b':') if cmd == b'REGISTER': cache.add(name) elif cmd == b'UNREGISTER': cache.remove(name) else: raise RuntimeError('unrecognized command %r' % cmd) except Exception: try: sys.excepthook(*sys.exc_info()) except: pass finally: # all processes have terminated; cleanup any remaining semaphores if cache: try: warnings.warn('semaphore_tracker: There appear to be %d ' 'leaked semaphores to clean up at shutdown' % len(cache)) except Exception: pass for name in cache: # For some reason the process which created and registered this # semaphore has failed to unregister it. 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''' from .managers import SyncManager m = SyncManager(ctx=self.get_context()) m.start() return m def Pipe(self, duplex=True): '''Returns two connection object connected by a pipe''' from .connection import Pipe return Pipe(duplex) def Lock(self): '''Returns a non-recursive lock object''' from .synchronize import Lock return Lock(ctx=self.get_context()) def RLock(self): '''Returns a recursive lock object''' from .synchronize import RLock return RLock(ctx=self.get_context()) def Condition(self, lock=None): '''Returns a condition object''' from .synchronize import Condition return Condition(lock, ctx=self.get_context()) def Semaphore(self, value=1): '''Returns a semaphore object''' from .synchronize import Semaphore return Semaphore(value, ctx=self.get_context()) def BoundedSemaphore(self, value=1): '''Returns a bounded semaphore object''' from .synchronize import BoundedSemaphore return BoundedSemaphore(value, ctx=self.get_context()) def Event(self): '''Returns an event object''' from .synchronize import Event return Event(ctx=self.get_context()) def Barrier(self, parties, action=None, timeout=None): '''Returns a barrier object''' from .synchronize import Barrier return Barrier(parties, action, timeout, ctx=self.get_context()) def Queue(self, maxsize=0): '''Returns a queue object''' from .queues import Queue return Queue(maxsize, ctx=self.get_context()) def JoinableQueue(self, maxsize=0): '''Returns a queue object''' from .queues import JoinableQueue return JoinableQueue(maxsize, ctx=self.get_context()) def SimpleQueue(self): '''Returns a queue object''' from .queues import SimpleQueue return SimpleQueue(ctx=self.get_context()) def Pool(self, processes=None, initializer=None, initargs=(), maxtasksperchild=None): '''Returns a process pool object''' from .pool import Pool return Pool(processes, initializer, initargs, maxtasksperchild, context=self.get_context()) def RawValue(self, typecode_or_type, *args): '''Returns a shared object''' from .sharedctypes import RawValue return RawValue(typecode_or_type, *args) def RawArray(self, typecode_or_type, size_or_initializer): '''Returns a shared array''' from .sharedctypes import RawArray return RawArray(typecode_or_type, size_or_initializer) def Value(self, typecode_or_type, *args, lock=True): '''Returns a synchronized shared object''' from .sharedctypes import Value return Value(typecode_or_type, *args, lock=lock, ctx=self.get_context()) def Array(self, typecode_or_type, size_or_initializer, *, lock=True): '''Returns a synchronized shared array''' from .sharedctypes import Array return Array(typecode_or_type, size_or_initializer, lock=lock, ctx=self.get_context()) def freeze_support(self): '''Check whether this is a fake forked process in a frozen executable. If so then run code specified by commandline and exit. ''' if sys.platform == 'win32' and getattr(sys, 'frozen', False): from .spawn import freeze_support freeze_support() def get_logger(self): '''Return package logger -- if it does not already exist then it is created. ''' from .util import get_logger return get_logger() def log_to_stderr(self, level=None): '''Turn on logging and add a handler which prints to stderr''' from .util import log_to_stderr return log_to_stderr(level) def allow_connection_pickling(self): '''Install support for sending connections and sockets between processes ''' # This is undocumented. In previous versions of multiprocessing # its only effect was to make socket objects inheritable on Windows. from . import connection def set_executable(self, executable): '''Sets the path to a python.exe or pythonw.exe binary used to run child processes instead of sys.executable when using the 'spawn' start method. Useful for people embedding Python. ''' from .spawn import set_executable set_executable(executable) def set_forkserver_preload(self, module_names): '''Set list of module names to try to load in forkserver process. This is really just a hint. ''' from .forkserver import set_forkserver_preload set_forkserver_preload(module_names) def get_context(self, method=None): if method is None: return self try: ctx = _concrete_contexts[method] except KeyError: raise ValueError('cannot find context for %r' % method) ctx._check_available() return ctx def get_start_method(self, allow_none=False): return self._name def set_start_method(self, method, force=False): raise ValueError('cannot set start method of concrete context') @property def reducer(self): '''Controls how objects will be reduced to a form that can be shared with other processes.''' return globals().get('reduction') @reducer.setter def reducer(self, reduction): globals()['reduction'] = reduction def _check_available(self): pass # # Type of default context -- underlying context can be set at most once # class Process(process.BaseProcess): _start_method = None @staticmethod def _Popen(process_obj): return _default_context.get_context().Process._Popen(process_obj) class DefaultContext(BaseContext): Process = Process def __init__(self, context): self._default_context = context self._actual_context = None def get_context(self, method=None): if method is None: if self._actual_context is None: self._actual_context = self._default_context return self._actual_context else: return super().get_context(method) def set_start_method(self, method, force=False): if self._actual_context is not None and not force: raise RuntimeError('context has already been set') if method is None and force: self._actual_context = None return self._actual_context = self.get_context(method) def get_start_method(self, allow_none=False): if self._actual_context is None: if allow_none: return None self._actual_context = self._default_context return self._actual_context._name def get_all_start_methods(self): if sys.platform == 'win32': return ['spawn'] else: if reduction.HAVE_SEND_HANDLE: return ['fork', 'spawn', 'forkserver'] else: return ['fork', 'spawn'] DefaultContext.__all__ = list(x for x in dir(DefaultContext) if x[0] != '_') # # Context types for fixed start method # if sys.platform != 'win32': class ForkProcess(process.BaseProcess): _start_method = 'fork' @staticmethod def _Popen(process_obj): from .popen_fork import Popen return Popen(process_obj) class SpawnProcess(process.BaseProcess): _start_method = 'spawn' @staticmethod def _Popen(process_obj): from .popen_spawn_posix import Popen return Popen(process_obj) class ForkServerProcess(process.BaseProcess): _start_method = 'forkserver' @staticmethod def _Popen(process_obj): from .popen_forkserver import Popen return Popen(process_obj) class ForkContext(BaseContext): _name = 'fork' Process = ForkProcess class SpawnContext(BaseContext): _name = 'spawn' Process = SpawnProcess class ForkServerContext(BaseContext): _name = 'forkserver' Process = ForkServerProcess def _check_available(self): if not reduction.HAVE_SEND_HANDLE: raise ValueError('forkserver start method not available') _concrete_contexts = { 'fork': ForkContext(), 'spawn': SpawnContext(), 'forkserver': ForkServerContext(), } _default_context = DefaultContext(_concrete_contexts['fork']) else: class SpawnProcess(process.BaseProcess): _start_method = 'spawn' @staticmethod def _Popen(process_obj): from .popen_spawn_win32 import Popen return Popen(process_obj) class SpawnContext(BaseContext): _name = 'spawn' Process = SpawnProcess _concrete_contexts = { 'spawn': SpawnContext(), } _default_context = DefaultContext(_concrete_contexts['spawn']) # # Force the start method # def _force_start_method(method): _default_context._actual_context = _concrete_contexts[method] # # Check that the current thread is spawning a child process # _tls = threading.local() def get_spawning_popen(): return getattr(_tls, 'spawning_popen', None) def set_spawning_popen(popen): _tls.spawning_popen = popen def assert_spawning(obj): if get_spawning_popen() is None: raise RuntimeError( '%s objects should only be shared between processes' ' through inheritance' % type(obj).__name__ ) forkserver.py000064400000020766147221272370007330 0ustar00import errno import os import selectors import signal import socket import struct import sys import threading from . import connection from . import process from .context import reduction from . import semaphore_tracker from . import spawn from . import util __all__ = ['ensure_running', 'get_inherited_fds', 'connect_to_new_process', 'set_forkserver_preload'] # # # MAXFDS_TO_SEND = 256 UNSIGNED_STRUCT = struct.Struct('Q') # large enough for pid_t # # Forkserver class # class ForkServer(object): def __init__(self): self._forkserver_address = None self._forkserver_alive_fd = None self._forkserver_pid = None self._inherited_fds = None self._lock = threading.Lock() self._preload_modules = ['__main__'] def set_forkserver_preload(self, modules_names): '''Set list of module names to try to load in forkserver process.''' if not all(type(mod) is str for mod in self._preload_modules): raise TypeError('module_names must be a list of strings') self._preload_modules = modules_names def get_inherited_fds(self): '''Return list of fds inherited from parent process. This returns None if the current process was not started by fork server. ''' return self._inherited_fds def connect_to_new_process(self, fds): '''Request forkserver to create a child process. Returns a pair of fds (status_r, data_w). The calling process can read the child process's pid and (eventually) its returncode from status_r. The calling process should write to data_w the pickled preparation and process data. ''' self.ensure_running() if len(fds) + 4 >= MAXFDS_TO_SEND: raise ValueError('too many fds') with socket.socket(socket.AF_UNIX) as client: client.connect(self._forkserver_address) parent_r, child_w = os.pipe() child_r, parent_w = os.pipe() allfds = [child_r, child_w, self._forkserver_alive_fd, semaphore_tracker.getfd()] allfds += fds try: reduction.sendfds(client, allfds) return parent_r, parent_w except: os.close(parent_r) os.close(parent_w) raise finally: os.close(child_r) os.close(child_w) def ensure_running(self): '''Make sure that a fork server is running. This can be called from any process. Note that usually a child process will just reuse the forkserver started by its parent, so ensure_running() will do nothing. ''' with self._lock: semaphore_tracker.ensure_running() if self._forkserver_pid is not None: # forkserver was launched before, is it still running? pid, status = os.waitpid(self._forkserver_pid, os.WNOHANG) if not pid: # still alive return # dead, launch it again os.close(self._forkserver_alive_fd) self._forkserver_address = None self._forkserver_alive_fd = None self._forkserver_pid = None cmd = ('from multiprocessing.forkserver import main; ' + 'main(%d, %d, %r, **%r)') if self._preload_modules: desired_keys = {'main_path', 'sys_path'} data = spawn.get_preparation_data('ignore') data = dict((x,y) for (x,y) in data.items() if x in desired_keys) else: data = {} with socket.socket(socket.AF_UNIX) as listener: address = connection.arbitrary_address('AF_UNIX') listener.bind(address) os.chmod(address, 0o600) listener.listen() # all client processes own the write end of the "alive" pipe; # when they all terminate the read end becomes ready. alive_r, alive_w = os.pipe() try: fds_to_pass = [listener.fileno(), alive_r] cmd %= (listener.fileno(), alive_r, self._preload_modules, data) exe = spawn.get_executable() args = [exe] + util._args_from_interpreter_flags() args += ['-c', cmd] pid = util.spawnv_passfds(exe, args, fds_to_pass) except: os.close(alive_w) raise finally: os.close(alive_r) self._forkserver_address = address self._forkserver_alive_fd = alive_w self._forkserver_pid = pid # # # def main(listener_fd, alive_r, preload, main_path=None, sys_path=None): '''Run forkserver.''' if preload: if '__main__' in preload and main_path is not None: process.current_process()._inheriting = True try: spawn.import_main_path(main_path) finally: del process.current_process()._inheriting for modname in preload: try: __import__(modname) except ImportError: pass util._close_stdin() handlers = { # no need to reap zombie processes; signal.SIGCHLD: signal.SIG_IGN, # protect the process from ^C signal.SIGINT: signal.SIG_IGN, } old_handlers = {sig: signal.signal(sig, val) for (sig, val) in handlers.items()} with socket.socket(socket.AF_UNIX, fileno=listener_fd) as listener, \ selectors.DefaultSelector() as selector: _forkserver._forkserver_address = listener.getsockname() selector.register(listener, selectors.EVENT_READ) selector.register(alive_r, selectors.EVENT_READ) while True: try: while True: rfds = [key.fileobj for (key, events) in selector.select()] if rfds: break if alive_r in rfds: # EOF because no more client processes left assert os.read(alive_r, 1) == b'' raise SystemExit assert listener in rfds with listener.accept()[0] as s: code = 1 if os.fork() == 0: try: _serve_one(s, listener, alive_r, old_handlers) except Exception: sys.excepthook(*sys.exc_info()) sys.stderr.flush() finally: os._exit(code) except OSError as e: if e.errno != errno.ECONNABORTED: raise def _serve_one(s, listener, alive_r, handlers): # close unnecessary stuff and reset signal handlers listener.close() os.close(alive_r) for sig, val in handlers.items(): signal.signal(sig, val) # receive fds from parent process fds = reduction.recvfds(s, MAXFDS_TO_SEND + 1) s.close() assert len(fds) <= MAXFDS_TO_SEND (child_r, child_w, _forkserver._forkserver_alive_fd, stfd, *_forkserver._inherited_fds) = fds semaphore_tracker._semaphore_tracker._fd = stfd # send pid to client processes write_unsigned(child_w, os.getpid()) # reseed random number generator if 'random' in sys.modules: import random random.seed() # run process object received over pipe code = spawn._main(child_r) # write the exit code to the pipe write_unsigned(child_w, code) # # Read and write unsigned numbers # def read_unsigned(fd): data = b'' length = UNSIGNED_STRUCT.size while len(data) < length: s = os.read(fd, length - len(data)) if not s: raise EOFError('unexpected EOF') data += s return UNSIGNED_STRUCT.unpack(data)[0] def write_unsigned(fd, n): msg = UNSIGNED_STRUCT.pack(n) while msg: nbytes = os.write(fd, msg) if nbytes == 0: raise RuntimeError('should not get here') msg = msg[nbytes:] # # # _forkserver = ForkServer() ensure_running = _forkserver.ensure_running get_inherited_fds = _forkserver.get_inherited_fds connect_to_new_process = _forkserver.connect_to_new_process set_forkserver_preload = _forkserver.set_forkserver_preload resource_sharer.py000064400000012315147221272370010322 0ustar00# # We use a background thread for sharing fds on Unix, and for sharing sockets on # Windows. # # A client which wants to pickle a resource registers it with the resource # sharer and gets an identifier in return. The unpickling process will connect # to the resource sharer, sends the identifier and its pid, and then receives # the resource. # import os import signal import socket import sys import threading from . import process from .context import reduction from . import util __all__ = ['stop'] if sys.platform == 'win32': __all__ += ['DupSocket'] class DupSocket(object): '''Picklable wrapper for a socket.''' def __init__(self, sock): new_sock = sock.dup() def send(conn, pid): share = new_sock.share(pid) conn.send_bytes(share) self._id = _resource_sharer.register(send, new_sock.close) def detach(self): '''Get the socket. This should only be called once.''' with _resource_sharer.get_connection(self._id) as conn: share = conn.recv_bytes() return socket.fromshare(share) else: __all__ += ['DupFd'] class DupFd(object): '''Wrapper for fd which can be used at any time.''' def __init__(self, fd): new_fd = os.dup(fd) def send(conn, pid): reduction.send_handle(conn, new_fd, pid) def close(): os.close(new_fd) self._id = _resource_sharer.register(send, close) def detach(self): '''Get the fd. This should only be called once.''' with _resource_sharer.get_connection(self._id) as conn: return reduction.recv_handle(conn) class _ResourceSharer(object): '''Manager for resouces using background thread.''' def __init__(self): self._key = 0 self._cache = {} self._old_locks = [] self._lock = threading.Lock() self._listener = None self._address = None self._thread = None util.register_after_fork(self, _ResourceSharer._afterfork) def register(self, send, close): '''Register resource, returning an identifier.''' with self._lock: if self._address is None: self._start() self._key += 1 self._cache[self._key] = (send, close) return (self._address, self._key) @staticmethod def get_connection(ident): '''Return connection from which to receive identified resource.''' from .connection import Client address, key = ident c = Client(address, authkey=process.current_process().authkey) c.send((key, os.getpid())) return c def stop(self, timeout=None): '''Stop the background thread and clear registered resources.''' from .connection import Client with self._lock: if self._address is not None: c = Client(self._address, authkey=process.current_process().authkey) c.send(None) c.close() self._thread.join(timeout) if self._thread.is_alive(): util.sub_warning('_ResourceSharer thread did ' 'not stop when asked') self._listener.close() self._thread = None self._address = None self._listener = None for key, (send, close) in self._cache.items(): close() self._cache.clear() def _afterfork(self): for key, (send, close) in self._cache.items(): close() self._cache.clear() # If self._lock was locked at the time of the fork, it may be broken # -- see issue 6721. Replace it without letting it be gc'ed. self._old_locks.append(self._lock) self._lock = threading.Lock() if self._listener is not None: self._listener.close() self._listener = None self._address = None self._thread = None def _start(self): from .connection import Listener assert self._listener is None util.debug('starting listener and thread for sending handles') self._listener = Listener(authkey=process.current_process().authkey) self._address = self._listener.address t = threading.Thread(target=self._serve) t.daemon = True t.start() self._thread = t def _serve(self): if hasattr(signal, 'pthread_sigmask'): signal.pthread_sigmask(signal.SIG_BLOCK, range(1, signal.NSIG)) while 1: try: with self._listener.accept() as conn: msg = conn.recv() if msg is None: break key, destination_pid = msg send, close = self._cache.pop(key) try: send(conn, destination_pid) finally: close() except: if not util.is_exiting(): sys.excepthook(*sys.exc_info()) _resource_sharer = _ResourceSharer() stop = _resource_sharer.stop popen_spawn_win32.py000064400000005667147221272370010516 0ustar00import os import msvcrt import signal import sys import _winapi from .context import reduction, get_spawning_popen, set_spawning_popen from . import spawn from . import util __all__ = ['Popen'] # # # TERMINATE = 0x10000 WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False)) WINSERVICE = sys.executable.lower().endswith("pythonservice.exe") # # We define a Popen class similar to the one from subprocess, but # whose constructor takes a process object as its argument. # class Popen(object): ''' Start a subprocess to run the code of a process object ''' method = 'spawn' def __init__(self, process_obj): prep_data = spawn.get_preparation_data(process_obj._name) # read end of pipe will be "stolen" by the child process # -- see spawn_main() in spawn.py. rhandle, whandle = _winapi.CreatePipe(None, 0) wfd = msvcrt.open_osfhandle(whandle, 0) cmd = spawn.get_command_line(parent_pid=os.getpid(), pipe_handle=rhandle) cmd = ' '.join('"%s"' % x for x in cmd) with open(wfd, 'wb', closefd=True) as to_child: # start process try: hp, ht, pid, tid = _winapi.CreateProcess( spawn.get_executable(), cmd, None, None, False, 0, None, None, None) _winapi.CloseHandle(ht) except: _winapi.CloseHandle(rhandle) raise # set attributes of self self.pid = pid self.returncode = None self._handle = hp self.sentinel = int(hp) util.Finalize(self, _winapi.CloseHandle, (self.sentinel,)) # send information to child set_spawning_popen(self) try: reduction.dump(prep_data, to_child) reduction.dump(process_obj, to_child) finally: set_spawning_popen(None) def duplicate_for_child(self, handle): assert self is get_spawning_popen() return reduction.duplicate(handle, self.sentinel) def wait(self, timeout=None): if self.returncode is None: if timeout is None: msecs = _winapi.INFINITE else: msecs = max(0, int(timeout * 1000 + 0.5)) res = _winapi.WaitForSingleObject(int(self._handle), msecs) if res == _winapi.WAIT_OBJECT_0: code = _winapi.GetExitCodeProcess(self._handle) if code == TERMINATE: code = -signal.SIGTERM self.returncode = code return self.returncode def poll(self): return self.wait(timeout=0) def terminate(self): if self.returncode is None: try: _winapi.TerminateProcess(int(self._handle), TERMINATE) except OSError: if self.wait(timeout=1.0) is None: raise spawn.py000064400000021237147221272370006262 0ustar00# # Code used to start processes when using the spawn or forkserver # start methods. # # multiprocessing/spawn.py # # Copyright (c) 2006-2008, R Oudkerk # Licensed to PSF under a Contributor Agreement. # import os import sys import runpy import types from . import get_start_method, set_start_method from . import process from .context import reduction from . import util __all__ = ['_main', 'freeze_support', 'set_executable', 'get_executable', 'get_preparation_data', 'get_command_line', 'import_main_path'] # # _python_exe is the assumed path to the python executable. # People embedding Python want to modify it. # if sys.platform != 'win32': WINEXE = False WINSERVICE = False else: WINEXE = (sys.platform == 'win32' and getattr(sys, 'frozen', False)) WINSERVICE = sys.executable.lower().endswith("pythonservice.exe") if WINSERVICE: _python_exe = os.path.join(sys.exec_prefix, 'python.exe') else: _python_exe = sys.executable def set_executable(exe): global _python_exe _python_exe = exe def get_executable(): return _python_exe # # # def is_forking(argv): ''' Return whether commandline indicates we are forking ''' if len(argv) >= 2 and argv[1] == '--multiprocessing-fork': return True else: return False def freeze_support(): ''' Run code for process object if this in not the main process ''' if is_forking(sys.argv): kwds = {} for arg in sys.argv[2:]: name, value = arg.split('=') if value == 'None': kwds[name] = None else: kwds[name] = int(value) spawn_main(**kwds) sys.exit() def get_command_line(**kwds): ''' Returns prefix of command line used for spawning a child process ''' if getattr(sys, 'frozen', False): return ([sys.executable, '--multiprocessing-fork'] + ['%s=%r' % item for item in kwds.items()]) else: prog = 'from multiprocessing.spawn import spawn_main; spawn_main(%s)' prog %= ', '.join('%s=%r' % item for item in kwds.items()) opts = util._args_from_interpreter_flags() return [_python_exe] + opts + ['-c', prog, '--multiprocessing-fork'] def spawn_main(pipe_handle, parent_pid=None, tracker_fd=None): ''' Run code specified by data received over pipe ''' assert is_forking(sys.argv) if sys.platform == 'win32': import msvcrt new_handle = reduction.steal_handle(parent_pid, pipe_handle) fd = msvcrt.open_osfhandle(new_handle, os.O_RDONLY) else: from . import semaphore_tracker semaphore_tracker._semaphore_tracker._fd = tracker_fd fd = pipe_handle exitcode = _main(fd) sys.exit(exitcode) def _main(fd): with os.fdopen(fd, 'rb', closefd=True) as from_parent: process.current_process()._inheriting = True try: preparation_data = reduction.pickle.load(from_parent) prepare(preparation_data) self = reduction.pickle.load(from_parent) finally: del process.current_process()._inheriting return self._bootstrap() def _check_not_importing_main(): if getattr(process.current_process(), '_inheriting', False): raise RuntimeError(''' An attempt has been made to start a new process before the current process has finished its bootstrapping phase. This probably means that you are not using fork to start your child processes and you have forgotten to use the proper idiom in the main module: if __name__ == '__main__': freeze_support() ... The "freeze_support()" line can be omitted if the program is not going to be frozen to produce an executable.''') def get_preparation_data(name): ''' Return info about parent needed by child to unpickle process object ''' _check_not_importing_main() d = dict( log_to_stderr=util._log_to_stderr, authkey=process.current_process().authkey, ) if util._logger is not None: d['log_level'] = util._logger.getEffectiveLevel() sys_path=sys.path.copy() try: i = sys_path.index('') except ValueError: pass else: sys_path[i] = process.ORIGINAL_DIR d.update( name=name, sys_path=sys_path, sys_argv=sys.argv, orig_dir=process.ORIGINAL_DIR, dir=os.getcwd(), start_method=get_start_method(), ) # Figure out whether to initialise main in the subprocess as a module # or through direct execution (or to leave it alone entirely) main_module = sys.modules['__main__'] main_mod_name = getattr(main_module.__spec__, "name", None) if main_mod_name is not None: d['init_main_from_name'] = main_mod_name elif sys.platform != 'win32' or (not WINEXE and not WINSERVICE): main_path = getattr(main_module, '__file__', None) if main_path is not None: if (not os.path.isabs(main_path) and process.ORIGINAL_DIR is not None): main_path = os.path.join(process.ORIGINAL_DIR, main_path) d['init_main_from_path'] = os.path.normpath(main_path) return d # # Prepare current process # old_main_modules = [] def prepare(data): ''' Try to get current process ready to unpickle process object ''' if 'name' in data: process.current_process().name = data['name'] if 'authkey' in data: process.current_process().authkey = data['authkey'] if 'log_to_stderr' in data and data['log_to_stderr']: util.log_to_stderr() if 'log_level' in data: util.get_logger().setLevel(data['log_level']) if 'sys_path' in data: sys.path = data['sys_path'] if 'sys_argv' in data: sys.argv = data['sys_argv'] if 'dir' in data: os.chdir(data['dir']) if 'orig_dir' in data: process.ORIGINAL_DIR = data['orig_dir'] if 'start_method' in data: set_start_method(data['start_method'], force=True) if 'init_main_from_name' in data: _fixup_main_from_name(data['init_main_from_name']) elif 'init_main_from_path' in data: _fixup_main_from_path(data['init_main_from_path']) # Multiprocessing module helpers to fix up the main module in # spawned subprocesses def _fixup_main_from_name(mod_name): # __main__.py files for packages, directories, zip archives, etc, run # their "main only" code unconditionally, so we don't even try to # populate anything in __main__, nor do we make any changes to # __main__ attributes current_main = sys.modules['__main__'] if mod_name == "__main__" or mod_name.endswith(".__main__"): return # If this process was forked, __main__ may already be populated if getattr(current_main.__spec__, "name", None) == mod_name: return # Otherwise, __main__ may contain some non-main code where we need to # support unpickling it properly. We rerun it as __mp_main__ and make # the normal __main__ an alias to that old_main_modules.append(current_main) main_module = types.ModuleType("__mp_main__") main_content = runpy.run_module(mod_name, run_name="__mp_main__", alter_sys=True) main_module.__dict__.update(main_content) sys.modules['__main__'] = sys.modules['__mp_main__'] = main_module def _fixup_main_from_path(main_path): # If this process was forked, __main__ may already be populated current_main = sys.modules['__main__'] # Unfortunately, the main ipython launch script historically had no # "if __name__ == '__main__'" guard, so we work around that # by treating it like a __main__.py file # See https://github.com/ipython/ipython/issues/4698 main_name = os.path.splitext(os.path.basename(main_path))[0] if main_name == 'ipython': return # Otherwise, if __file__ already has the setting we expect, # there's nothing more to do if getattr(current_main, '__file__', None) == main_path: return # If the parent process has sent a path through rather than a module # name we assume it is an executable script that may contain # non-main code that needs to be executed old_main_modules.append(current_main) main_module = types.ModuleType("__mp_main__") main_content = runpy.run_path(main_path, run_name="__mp_main__") main_module.__dict__.update(main_content) sys.modules['__main__'] = sys.modules['__mp_main__'] = main_module def import_main_path(main_path): ''' Set sys.modules['__main__'] to module at main_path ''' _fixup_main_from_path(main_path) popen_spawn_posix.py000064400000003560147221272370010704 0ustar00import io import os from .context import reduction, set_spawning_popen from . import popen_fork from . import spawn from . import util __all__ = ['Popen'] # # Wrapper for an fd used while launching a process # class _DupFd(object): def __init__(self, fd): self.fd = fd def detach(self): return self.fd # # Start child process using a fresh interpreter # class Popen(popen_fork.Popen): method = 'spawn' DupFd = _DupFd def __init__(self, process_obj): self._fds = [] super().__init__(process_obj) def duplicate_for_child(self, fd): self._fds.append(fd) return fd def _launch(self, process_obj): from . import semaphore_tracker tracker_fd = semaphore_tracker.getfd() self._fds.append(tracker_fd) prep_data = spawn.get_preparation_data(process_obj._name) fp = io.BytesIO() set_spawning_popen(self) try: reduction.dump(prep_data, fp) reduction.dump(process_obj, fp) finally: set_spawning_popen(None) parent_r = child_w = child_r = parent_w = None try: parent_r, child_w = os.pipe() child_r, parent_w = os.pipe() cmd = spawn.get_command_line(tracker_fd=tracker_fd, pipe_handle=child_r) self._fds.extend([child_r, child_w]) self.pid = util.spawnv_passfds(spawn.get_executable(), cmd, self._fds) self.sentinel = parent_r with open(parent_w, 'wb', closefd=False) as f: f.write(fp.getbuffer()) finally: if parent_r is not None: util.Finalize(self, os.close, (parent_r,)) for fd in (child_r, child_w, parent_w): if fd is not None: 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