SyncMutex::__construct

(PECL sync >= 1.0.0)

SyncMutex::__construct — Constructs a new SyncMutex object

설명

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

Constructs a named or unnamed countable mutex.

인수

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.

반환값

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

예제

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();
?>

참고

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