Php/docs/syncmutex.construct

• PHP Manual
• SyncMutex
• Constructs a new SyncMutex object

SyncMutex::__construct

(PECL sync >= 1.0.0)

SyncMutex::__construct — Constructs a new SyncMutex object

说明

public SyncMutex::__construct ([ string $name ] )

Constructs a named or unnamed countable mutex.

参数

name

The name of the mutex if this is a named mutex object.

Note:

If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.

返回值

The new SyncMutex object. An exception is thrown if the mutex cannot be created or opened.

范例

Example #1 SyncMutex::__construct() named mutex with lock timeout example

<?php$mutex = new SyncMutex("UniqueName");if (!$mutex->lock(3000)){    echo "Unable to lock mutex.";    exit();}/* ... */$mutex->unlock();?>

Example #2 SyncMutex::__construct() unnamed mutex example

<?php$mutex = new SyncMutex();$mutex->lock();/* ... */$mutex->unlock();?>

参见

• SyncMutex::lock() - Waits for an exclusive lock
• SyncMutex::unlock() - Unlocks the mutex