Req #39168 [Com]: Semaphore acquire timeout

[jhill9693 at gmail dot com]

Edit report at https://bugs.php.net/bug.php?id=39168&edit=1

 ID:                 39168
 Comment by:         jhill9693 at gmail dot com
 Reported by:        s dot s at terra dot com dot br
 Summary:            Semaphore acquire timeout
 Status:             Open
 Type:               Feature/Change Request
 Package:            Semaphore related
 Operating System:   Freebsd 6
 PHP Version:        5.1.6
 Block user comment: N
 Private report:     N

 New Comment:

You can do this with pcntl_alarm() and pcntl_signal() to send yourself the 
SIGALRM POSIX signal after a 
number of seconds.

<?php

declare(ticks = 1);

function handle_timeout() {
  throw new Exception('Semaphore acquire timeout');
}

pcntl_signal(SIGALRM, 'handle_timeout');

$key = ftok(__FILE__, 'R');
$sem = sem_get($key);

pcntl_alarm(10);
sem_acquire($sem);
pcntl_alarm(0);

echo 'Semaphore acquired :)';
sem_release($sem);


Previous Comments:
------------------------------------------------------------------------
[2006-10-16 16:55:21] s dot s at terra dot com dot br

Description:
------------
Should be great if there was an optional parameter (default = 0) in function 
sem_acquire to pass a timeout (in seconds).

Maybe send a warning no semaphore timeout ;)

Reproduce code:
---------------
Something like

<?php
$key = ftok(__FILE__, 'R');
$sem = sem_get($key);
if(sem_acquire($sem, 10)) {
  echo 'Semaphore acquire failed. Timeout?';
}
else {
  echo 'Semaphore acquired :)';
  sem_release($sem);
}
?>



------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=39168&edit=1