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#!/usr/bin/env perl
use strict;
use warnings;
use PDL::LiteF;
my $can_use_threads = eval 'use threads; 1'; ## no critic (eval)
use Test::More;
if( ! $can_use_threads ) {
plan skip_all => "perl does not support threads";
} else {
plan tests => 1;
$PDL::no_clone_skip_warning = 1;
require PDL::FFTW3;
PDL::FFTW3->import('rfft1');
require Thread::Semaphore;
}
my $s = Thread::Semaphore->new();
sub run_fft {
note "Running in thread #" . threads->self->tid;
for my $size_factor (1..10) {
my $xvals = sequence($size_factor * 100);
my $x = sin( $xvals * 2.0 ) + 2.0 * cos( $xvals / 3.0 );
my $F = rfft1( $x );
}
$s->down;
return 1;
}
subtest "Running FFTW in threads" => sub {
eval {
local $SIG{ALRM} = sub { die "alarm\n" };
alarm 4; # timeout in 4 seconds
my @threads;
for (0..7) {
push @threads, threads->create(\&run_fft);
$s->up;
}
$s->down;
for my $thr (@threads) {
my ($return) = $thr->join;
if( ! $return ) {
fail "Thread #@{[ $thr->tid ]} did not complete successfully";
return;
}
}
alarm 0;
};
if ($@) {
if($@ eq "alarm\n") {
fail "Threads hanging";
} else {
die $@;
}
}
pass "All threads returned successfully";
};
done_testing;
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