晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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package Test2::IPC;
use strict;
use warnings;
our $VERSION = '1.302135';
use Test2::API::Instance;
use Test2::Util qw/get_tid/;
use Test2::API qw{
test2_init_done
test2_ipc
test2_has_ipc
test2_ipc_enable_polling
test2_pid
test2_stack
test2_tid
context
};
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;
}
1;
__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
Copyright 2018 Chad Granum E<lt>exodist@cpan.orgE<gt>.
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