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.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \(-- will .\" give an unbreakable dash, \(PI will give pi, \(L" will give a left .\" double quote, and \(R" will give a right double quote. \(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \(C` and \(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(W\h'-12u'\(W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(W\h'-12u'\(W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \\|\(em\\| . ds PI \(p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is turned on, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{ . if \nF \{ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u)).13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu8/10-\(#H)'\'\h"\|\\n:u" . ds ` \\k:\h'-(\\n(.wu8/10-\(#H)'\`\h'\|\\n:u' . ds ^ \\k:\h'-(\\n(.wu10/11-\(#H)'^\h'\|\\n:u' . ds , \\k:\h'-(\\n(.wu8/10)',\h'\|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\(#H-.1m)'~\h'\|\\n:u' . ds / \\k:\h'-(\\n(.wu8/10-\(#H)'\z\(sl\h'\|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu8/10-\(#H+.1m+\(#F)'\v'-\(#V'\z.\h'.2m+\(#F'.\h'\|\\n:u'\v'\(#V' .ds 8 \h'\(#H'\(b\h'-\(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\(#H)/2u'\v'-.3n'\(#[\z\(de\v'.3n'\h'\|\\n:u'\(#] .ds d- \h'\(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'\|\\n:u' .ds th \(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u2/3)'\s-1o\s+1\(#] .ds Th \(#[\s+2I\s-2\h'-\w'I'u3/5'\v'-.3m'o\v'.3m'\(#] .ds ae a\h'-(\w'a'u4/10)'e .ds Ae A\h'-(\w'A'u4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu9/10-\(#H)'\s-2\u~\d\s+2\h'\|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu10/11-\(#H)'\v'-.4m'^\v'.4m'\h'\|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "Test2::IPC::Driver 3" .TH Test2::IPC::Driver 3 "2019-09-06" "perl v5.16.3" "User Contributed Perl Documentation" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" Test2::IPC::Driver \- Base class for Test2 IPC drivers. .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& package Test2::IPC::Driver::MyDriver; \& \& use base \(AqTest2::IPC::Driver\(Aq; \& \& ... .Ve .SH "METHODS" .IX Header "METHODS" .ie n .IP "$self\->abort($msg)" 4 .el .IP "\f(CW$self\fR\->abort($msg)" 4 .IX Item "$self->abort($msg)" If an \s-1IPC\s0 encounters a fatal error it should use this. This will print the message to \s-1STDERR\s0 with \f(CW\(AqIPC Fatal Error: \(Aq\fR prefixed to it, then it will forcefully exit 255. \s-1IPC\s0 errors may occur in threads or processes other than the main one, this method provides the best chance of the harness noticing the error. .ie n .IP "$self\->abort_trace($msg)" 4 .el .IP "\f(CW$self\fR\->abort_trace($msg)" 4 .IX Item "$self->abort_trace($msg)" This is the same as \f(CW\(C`$ipc\->abort($msg)\(C'\fR except that it uses \&\f(CW\(C`Carp::longmess\(C'\fR to add a stack trace to the message. .SH "LOADING DRIVERS" .IX Header "LOADING DRIVERS" Test2::IPC::Driver has an \f(CW\(C`import()\(C'\fR method. All drivers inherit this import method. This import method registers the driver. .PP In most cases you just need to load the desired \s-1IPC\s0 driver to make it work. You should load this driver as early as possible. A warning will be issued if you load it too late for it to be effective. .PP .Vb 2 \& use Test2::IPC::Driver::MyDriver; \& ... .Ve .SH "WRITING DRIVERS" .IX Header "WRITING DRIVERS" .Vb 3 \& package Test2::IPC::Driver::MyDriver; \& use strict; \& use warnings; \& \& use base \(AqTest2::IPC::Driver\(Aq; \& \& sub is_viable { \& return 0 if $^O eq \(Aqwin32\(Aq; # Will not work on windows. \& return 1; \& } \& \& sub add_hub { \& my $self = shift; \& my ($hid) = @_; \& \& ... # Make it possible to contact the hub \& } \& \& sub drop_hub { \& my $self = shift; \& my ($hid) = @_; \& \& ... # Nothing should try to reach the hub anymore. \& } \& \& sub send { \& my $self = shift; \& my ($hid, $e, $global) = @_; \& \& ... # Send the event to the proper hub. \& \& # This may notify other procs/threads that there is a pending event. \& Test2::API::test2_ipc_set_pending($uniq_val); \& } \& \& sub cull { \& my $self = shift; \& my ($hid) = @_; \& \& my @events = ...; # Here is where you get the events for the hub \& \& return @events; \& } \& \& sub waiting { \& my $self = shift; \& \& ... # Notify all listening procs and threads that the main \& ... # process/thread is waiting for them to finish. \& } \& \& 1; .Ve .SS "\s-1METHODS SUBCLASSES MUST IMPLEMENT\s0" .IX Subsection "METHODS SUBCLASSES MUST IMPLEMENT" .ie n .IP "$ipc\->is_viable" 4 .el .IP "\f(CW$ipc\fR\->is_viable" 4 .IX Item "$ipc->is_viable" This should return true if the driver works in the current environment. This should return false if it does not. This is a \s-1CLASS\s0 method. .ie n .IP "$ipc\->add_hub($hid)" 4 .el .IP "\f(CW$ipc\fR\->add_hub($hid)" 4 .IX Item "$ipc->add_hub($hid)" This is used to alert the driver that a new hub is expecting events. The driver should keep track of the process and thread ids, the hub should only be dropped by the proc+thread that started it. .Sp .Vb 3 \& sub add_hub { \& my $self = shift; \& my ($hid) = @_; \& \& ... # Make it possible to contact the hub \& } .Ve .ie n .IP "$ipc\->drop_hub($hid)" 4 .el .IP "\f(CW$ipc\fR\->drop_hub($hid)" 4 .IX Item "$ipc->drop_hub($hid)" This is used to alert the driver that a hub is no longer accepting events. The driver should keep track of the process and thread ids, the hub should only be dropped by the proc+thread that started it (This is the drivers responsibility to enforce). .Sp .Vb 3 \& sub drop_hub { \& my $self = shift; \& my ($hid) = @_; \& \& ... # Nothing should try to reach the hub anymore. \& } .Ve .ie n .IP "$ipc\->send($hid, $event);" 4 .el .IP "\f(CW$ipc\fR\->send($hid, \f(CW$event\fR);" 4 .IX Item "$ipc->send($hid, $event);" .PD 0 .ie n .IP "$ipc\->send($hid, $event, $global);" 4 .el .IP "\f(CW$ipc\fR\->send($hid, \f(CW$event\fR, \f(CW$global\fR);" 4 .IX Item "$ipc->send($hid, $event, $global);" .PD Used to send events from the current process/thread to the specified hub in its process+thread. .Sp .Vb 3 \& sub send { \& my $self = shift; \& my ($hid, $e) = @_; \& \& ... # Send the event to the proper hub. \& \& # This may notify other procs/threads that there is a pending event. \& Test2::API::test2_ipc_set_pending($uniq_val); \& } .Ve .Sp If \f(CW$global\fR is true then the driver should send the event to all hubs in all processes and threads. .ie n .IP "@events = $ipc\->cull($hid)" 4 .el .IP "\f(CW@events\fR = \f(CW$ipc\fR\->cull($hid)" 4 .IX Item "@events = $ipc->cull($hid)" Used to collect events that have been sent to the specified hub. .Sp .Vb 3 \& sub cull { \& my $self = shift; \& my ($hid) = @_; \& \& my @events = ...; # Here is where you get the events for the hub \& \& return @events; \& } .Ve .ie n .IP "$ipc\->\fIwaiting()\fR" 4 .el .IP "\f(CW$ipc\fR\->\fIwaiting()\fR" 4 .IX Item "$ipc->waiting()" This is called in the parent process when it is complete and waiting for all child processes and threads to complete. .Sp .Vb 2 \& sub waiting { \& my $self = shift; \& \& ... # Notify all listening procs and threads that the main \& ... # process/thread is waiting for them to finish. \& } .Ve .SS "\s-1METHODS SUBCLASSES MAY IMPLEMENT OR OVERRIDE\s0" .IX Subsection "METHODS SUBCLASSES MAY IMPLEMENT OR OVERRIDE" .ie n .IP "$ipc\->driver_abort($msg)" 4 .el .IP "\f(CW$ipc\fR\->driver_abort($msg)" 4 .IX Item "$ipc->driver_abort($msg)" This is a hook called by \f(CW\(C`Test2::IPC::Driver\->abort()\*(C'\fR. This is your chance to cleanup when an abort happens. You cannot prevent the abort, but you can gracefully except it. .SH "SOURCE" .IX Header "SOURCE" The source code repository for Test2 can be found at \&\fIhttp://github.com/Test\-More/test\-more/\fR. .SH "MAINTAINERS" .IX Header "MAINTAINERS" .IP "Chad Granum <exodist@cpan.org>" 4 .IX Item "Chad Granum <exodist@cpan.org>" .SH "AUTHORS" .IX Header "AUTHORS" .PD 0 .IP "Chad Granum <exodist@cpan.org>" 4 .IX Item "Chad Granum <exodist@cpan.org>" .PD .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2019 Chad Granum <exodist@cpan.org>. .PP This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. .PP See \fIhttp://dev.perl.org/licenses/\fR

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