PHP Manual: Attempt to Acquire Mutex

Description

final public static boolean Mutex::trylock ( long $mutex )

Attempt to lock the Mutex for the caller without blocking if the Mutex is owned (locked) by another Thread.

Parameters

mutex: A handle returned by a previous call to Mutex::create.

Return Values

A boolean indication of success.

Examples

Example #1 Mutex Locking and Unlocking


<?php
/** You cannot use the "new" keyword, a Mutex is not a PHP object **/
$mutex = Mutex::create();
/** You can now try to lock the mutex in any context **/
var_dump(Mutex::trylock($mutex));
/** It is invalid to attempt to destroy a locked Mutex **/
var_dump(Mutex::unlock($mutex));
/** Always destroy mutex you have created **/
Mutex::destroy($mutex);
?>

The above example will output:

bool(true)
bool(true)