SyncSemaphore::lock
(PECL sync >= 1.0.0)
SyncSemaphore::lock — Decreases the count of the semaphore or waits
Description
public bool SyncSemaphore::lock ([ integer $wait = -1 ] )Decreases the count of a SyncSemaphore object or waits until the semaphore becomes non-zero.
Parameters
wait
The number of milliseconds to wait for the semaphore. A value of -1 is infinite.
Return Values
A boolean of TRUE if the lock operation was successful, FALSE otherwise.
Examples
Example #1 SyncSemaphore::lock() example
<?php
$semaphore?=?new?SyncSemaphore("LimitedResource_2clients",?2);
if?(!$semaphore->lock(3000))
{
????echo?"Unable?to?lock?semaphore.";
????exit();
}
/*?...?*/
$semaphore->unlock();
?>See Also
- SyncSemaphore::unlock() - Increases the count of the semaphore
← SyncSemaphore::__construct
SyncSemaphore::unlock →
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