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|
use strict;
use warnings;
BEGIN {
use Config;
if (! $Config{'useithreads'}) {
print("1..0 # SKIP Perl not compiled with 'useithreads'\n");
exit(0);
}
}
use ExtUtils::testlib;
use threads;
BEGIN {
if (! eval 'use threads::shared; 1') {
print("1..0 # SKIP threads::shared not available\n");
exit(0);
}
local $SIG{'HUP'} = sub {};
my $thr = threads->create(sub {});
eval { $thr->kill('HUP') };
$thr->join();
if ($@ && $@ =~ /safe signals/) {
print("1..0 # SKIP Not using safe signals\n");
exit(0);
}
require Thread::Queue;
require Thread::Semaphore;
$| = 1;
print("1..18\n"); ### Number of tests that will be run ###
};
my $q = Thread::Queue->new();
my $TEST = 1;
sub ok
{
$q->enqueue(@_);
while ($q->pending()) {
my $ok = $q->dequeue();
my $name = $q->dequeue();
my $id = $TEST++;
if ($ok) {
print("ok $id - $name\n");
} else {
print("not ok $id - $name\n");
printf("# Failed test at line %d\n", (caller)[2]);
}
}
}
### Start of Testing ###
ok(1, 'Loaded');
### Thread cancel ###
# Set up to capture warning when thread terminates
my @errs :shared;
$SIG{__WARN__} = sub { push(@errs, @_); };
sub thr_func {
my $q = shift;
# Thread 'cancellation' signal handler
$SIG{'KILL'} = sub {
$q->enqueue(1, 'Thread received signal');
die("Thread killed\n");
};
# Thread sleeps until signalled
$q->enqueue(1, 'Thread sleeping');
sleep(1) for (1..10);
# Should not go past here
$q->enqueue(0, 'Thread terminated normally');
return ('ERROR');
}
# Create thread
my $thr = threads->create('thr_func', $q);
ok($thr && $thr->tid() == 2, 'Created thread');
threads->yield();
sleep(1);
# Signal thread
ok($thr->kill('KILL') == $thr, 'Signalled thread');
threads->yield();
# Cleanup
my $rc = $thr->join();
ok(! $rc, 'No thread return value');
# Check for thread termination message
ok(@errs && $errs[0] =~ /Thread killed/, 'Thread termination warning');
### Thread suspend/resume ###
sub thr_func2
{
my $q = shift;
my $sema = shift;
$q->enqueue($sema, 'Thread received semaphore');
# Set up the signal handler for suspension/resumption
$SIG{'STOP'} = sub {
$q->enqueue(1, 'Thread suspending');
$sema->down();
$q->enqueue(1, 'Thread resuming');
$sema->up();
};
# Set up the signal handler for graceful termination
my $term = 0;
$SIG{'TERM'} = sub {
$q->enqueue(1, 'Thread caught termination signal');
$term = 1;
};
# Do work until signalled to terminate
while (! $term) {
sleep(1);
}
$q->enqueue(1, 'Thread done');
return ('OKAY');
}
# Create a semaphore for use in suspending the thread
my $sema = Thread::Semaphore->new();
ok($sema, 'Semaphore created');
# Create a thread and send it the semaphore
$thr = threads->create('thr_func2', $q, $sema);
ok($thr && $thr->tid() == 3, 'Created thread');
threads->yield();
sleep(1);
# Suspend the thread
$sema->down();
ok($thr->kill('STOP') == $thr, 'Suspended thread');
threads->yield();
sleep(1);
# Allow the thread to continue
$sema->up();
threads->yield();
sleep(1);
# Terminate the thread
ok($thr->kill('TERM') == $thr, 'Signalled thread to terminate');
$rc = $thr->join();
ok($rc eq 'OKAY', 'Thread return value');
ok($thr->kill('TERM') == $thr, 'Ignore signal to terminated thread');
exit(0);
# EOF
|
