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File IPC.pm

package Test2::IPC;
use strict;
use warnings;

our $VERSION = '1.302183';

use Test2::API::Instance;
use Test2::Util qw/get_tid/;
use Test2::API qw{
    test2_in_preload
    test2_init_done
    test2_ipc
    test2_has_ipc
    test2_ipc_enable_polling
    test2_pid
    test2_stack
    test2_tid
    context
};

# Make sure stuff is finalized before anyone tried to fork or start a new thread.
{
    # Avoid warnings if things are loaded at run-time
    no warnings 'void';
    INIT {
        use warnings 'void';
        context()->release() unless test2_in_preload();
    }
}

use Carp qw/confess/;

our @EXPORT_OK = qw/cull/;
BEGIN { require Exporter; our @ISA = qw(Exporter) }

sub unimport { Test2::API::test2_ipc_disable() }

sub import {
    goto &Exporter::import if test2_has_ipc || !test2_init_done();

confess "IPC is disabled" if Test2::API::test2_ipc_disabled();
    confess "Cannot add IPC in a child process (" . test2_pid() . " vs $$)" if test2_pid() != $$;
    confess "Cannot add IPC in a child thread (" . test2_tid() . " vs " . get_tid() . ")"  if test2_tid() != get_tid();

Test2::API::_set_ipc(_make_ipc());
    apply_ipc(test2_stack());

goto &Exporter::import;
}

sub _make_ipc {
    # Find a driver
    my ($driver) = Test2::API::test2_ipc_drivers();
    unless ($driver) {
        require Test2::IPC::Driver::Files;
        $driver = 'Test2::IPC::Driver::Files';
    }

return $driver->new();
}

sub apply_ipc {
    my $stack = shift;

my ($root) = @$stack;

return unless $root;

confess "Cannot add IPC in a child process" if $root->pid != $$;
    confess "Cannot add IPC in a child thread"  if $root->tid != get_tid();

my $ipc = $root->ipc || test2_ipc() || _make_ipc();

# Add the IPC to all hubs
    for my $hub (@$stack) {
        my $has = $hub->ipc;
        confess "IPC Mismatch!" if $has && $has != $ipc;
        next if $has;
        $hub->set_ipc($ipc);
        $ipc->add_hub($hub->hid);
    }

test2_ipc_enable_polling();

return $ipc;
}

sub cull {
    my $ctx = context();
    $ctx->hub->cull;
    $ctx->release;
}

__END__

=pod

=encoding UTF-8

=head1 NAME

Test2::IPC - Turn on IPC for threading or forking support.

=head1 SYNOPSIS

You should C<use Test2::IPC;> as early as possible in your test file. If you
import this module after API initialization it will attempt to retrofit IPC
onto the existing hubs.

=head2 DISABLING IT

You can use C<no Test2::IPC;> to disable IPC for good. You can also use the
T2_NO_IPC env var.

=head1 EXPORTS

All exports are optional.

=over 4

=item cull()

Cull allows you to collect results from other processes or threads on demand.

=back

=head1 SOURCE

The source code repository for Test2 can be found at
F<http://github.com/Test-More/test-more/>.

=head1 MAINTAINERS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 AUTHORS

=over 4

=item Chad Granum E<lt>exodist@cpan.orgE<gt>

=back

=head1 COPYRIGHT

This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

See F<http://dev.perl.org/licenses/>

=cut

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
..	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
API	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
Event	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
EventFacet	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
Formatter	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
Hub	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
IPC	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
Tools	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
Util	DIR	-	drwxr-xr-x	2026-06-24 01:59:38
API.pm	text/plain	47.26 KB	-rw-r--r--	2026-06-23 08:11:00
Event.pm	text/plain	22.11 KB	-rw-r--r--	2026-06-23 08:11:00
EventFacet.pm	text/plain	1.46 KB	-rw-r--r--	2026-06-23 08:11:00
Formatter.pm	text/plain	3.86 KB	-rw-r--r--	2026-06-23 08:11:00
Hub.pm	text/plain	22.29 KB	-rw-r--r--	2026-06-23 08:11:00
IPC.pm	text/plain	3.1 KB	-rw-r--r--	2026-06-23 08:11:00
Transition.pod	text/plain	13.18 KB	-rw-r--r--	2026-06-23 08:11:00
Util.pm	text/plain	10.25 KB	-rw-r--r--	2026-06-23 08:11:00

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