PAL.C.T MINI SHELL
--TEST--
sem_acquire with nowait
--SKIPIF--
<?php // vim600: ts=4 sw=4 syn=php fdm=marker
if(!extension_loaded('sysvsem') || !extension_loaded('pcntl')) {
die("skip sysvsem and pcntl required");
}
?>
--FILE--
<?php
$SEMKEY = ftok(__FILE__, 'P'); // Semaphore key
$pid = pcntl_fork();
if ($pid) {
echo "Parent.\n";
pcntl_signal(SIGCHLD, SIG_IGN);
// Get semaphore
$sem_id = sem_get($SEMKEY, 1);
if ($sem_id === FALSE) {
echo "P: fail to get semaphore";
exit;
}
echo "P: got semaphore $sem_id.\n";
register_shutdown_function(function () use ($sem_id) {
echo "P: cleanup.\n";
sem_remove($sem_id);
});
// Acquire semaphore
if (! sem_acquire($sem_id)) {
echo "P: fail to acquire semaphore $sem_id.\n";
sem_remove($sem_id);
exit;
}
echo "P: success acquire semaphore $sem_id.\n";
usleep(20000);
echo "P: releases.\n";
sem_release($sem_id);
usleep(5000);
// Acquire semaphore
if (! sem_acquire($sem_id)) {
echo "P: fail to acquire semaphore $sem_id.\n";
sem_remove($sem_id);
exit;
}
echo "P: success acquire semaphore $sem_id.\n";
$status = null;
pcntl_waitpid($pid, $status);
} else {
usleep(10000);
echo "Child.\n";
// Get semaphore
$sem_id = sem_get($SEMKEY, 1);
if ($sem_id === FALSE) {
echo "C: fail to get semaphore";
exit;
}
echo "C: got semaphore $sem_id.\n";
// Acquire semaphore
if (! sem_acquire($sem_id)) {
echo "C: fail to acquire semaphore $sem_id.\n";
exit;
}
echo "C: success acquire semaphore $sem_id.\n";
echo "C: releases.\n";
sem_release($sem_id);
usleep(10000);
// Acquire semaphore
if (! sem_acquire($sem_id, true)) {
echo "C: fail to acquire semaphore $sem_id.\n";
exit;
}
echo "C: success acquire semaphore $sem_id.\n";
}
?>
--EXPECTF--
Parent.
P: got semaphore Resource id #%i.
P: success acquire semaphore Resource id #%i.
Child.
C: got semaphore Resource id #%i.
P: releases.
C: success acquire semaphore Resource id #%i.
C: releases.
P: success acquire semaphore Resource id #%i.
C: fail to acquire semaphore Resource id #%i.
P: cleanup.
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