PHP
处理控制 | Process Control

Mutex::lock

Mutex::lock

(PECL pthreads < 3.0.0)

Mutex::lock — Acquire Mutex

Warning

The Mutex class has been removed in pthreads v3.

Description

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

Attempt to lock the Mutex for the caller.

An attempt to lock a Mutex owned (locked) by another Thread will result in blocking.

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 **/ $mutex = Mutex::create( /** You can now lock the mutex in any context **/ var_dump(Mutex::lock($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)

← Mutex::destroy

Mutex::trylock →

© 1997–2017 The PHP Documentation Group

Licensed under the Creative Commons Attribution License v3.0 or later.

https://secure.php.net/manual/en/mutex.lock.php