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package Scope::Upper::TestThreads;
use strict;
use warnings;
use Config qw<%Config>;
use Scope::Upper qw<SU_THREADSAFE>;
use VPIT::TestHelpers;
sub diag {
require Test::Leaner;
Test::Leaner::diag(@_);
}
sub import {
shift;
skip_all 'This Scope::Upper isn\'t thread safe' unless SU_THREADSAFE;
my $force = $ENV{PERL_SCOPE_UPPER_TEST_THREADS} ? 1 : !1;
skip_all 'This perl wasn\'t built to support threads'
unless $Config{useithreads};
skip_all 'perl 5.13.4 required to test thread safety'
unless $force or "$]" >= 5.013_004;
load_or_skip_all('threads', $force ? '0' : '1.67', [ ]);
my %exports = (
spawn => \&spawn,
);
my $usleep;
if (do { local $@; eval { require Time::HiRes; 1 } }) {
defined and diag "Using Time::HiRes $_" for $Time::HiRes::VERSION;
$exports{usleep} = \&Time::HiRes::usleep;
} else {
diag 'Using fallback usleep';
$exports{usleep} = sub {
my $s = int($_[0] / 2.5e5);
sleep $s if $s;
};
}
my $pkg = caller;
while (my ($name, $code) = each %exports) {
no strict 'refs';
*{$pkg.'::'.$name} = $code;
}
}
sub spawn {
local $@;
my @diag;
my $thread = eval {
local $SIG{__WARN__} = sub { push @diag, "Thread creation warning: @_" };
threads->create(@_);
};
push @diag, "Thread creation error: $@" if $@;
if (@diag) {
require Test::Leaner;
Test::Leaner::diag($_) for @diag;
}
return $thread ? $thread : ();
}
1;
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