SyncSemaphore::lock
(PECL sync >= 1.0.0)
SyncSemaphore::lock — Decreases the count of the semaphore or waits
説明
public SyncSemaphore::lock
([ int $wait = -1
] ) : bool
Decreases the count of a SyncSemaphore object or waits until the semaphore becomes non-zero.
パラメータ
wait- The number of milliseconds to wait for the semaphore. A value of -1 is infinite.
返り値
A boolean of TRUE if the lock operation was successful, FALSE otherwise.
例
例1 SyncSemaphore::lock() example
<?php$semaphore = new SyncSemaphore("LimitedResource_2clients", 2);if (!$semaphore->lock(3000)){ echo "Unable to lock semaphore."; exit();}/* ... */$semaphore->unlock();?>
