(PECL sync >= 1.0.0)

SyncSemaphore::lockDecreases the count of the semaphore or waits


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

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

Elenco dei parametri


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

Valori restituiti

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


Example #1 SyncSemaphore::lock() example

= new SyncSemaphore("LimitedResource_2clients"2);

if (!
"Unable to lock semaphore.";


/* ... */


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