Mutex::trylock

(PECL pthreads >= 0.34)

Mutex::trylock — Attempt to Acquire Mutex

说明

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.

参数

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

返回值

A boolean indication of success.

范例

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);
?>

以上例程会输出：

bool(true)
bool(true)