SyncSemaphore::lock

(PECL sync >= 1.0.0)

SyncSemaphore::lock — Decreases the count of the semaphore or waits

Descrierea

public SyncSemaphore::lock ([ int $wait = -1 ] ) : bool

Decreases the count of a SyncSemaphore object or waits until the semaphore becomes non-zero.

Parametri

wait

The number of milliseconds to wait for the semaphore. A value of -1 is infinite.

Valorile întoarse

A boolean of TRUE if the lock operation was successful, FALSE otherwise.

Exemple

Example #1 SyncSemaphore::lock() example

<?php
$semaphore = new SyncSemaphore("LimitedResource_2clients", 2);

if (!$semaphore->lock(3000))
{
    echo "Unable to lock semaphore.";

    exit();
}

/* ... */

$semaphore->unlock();
?>

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