PHP マニュアル: Constructs a new SyncMutex object

説明

public SyncMutex::__construct(string $name = ?)

Constructs a named or unnamed countable mutex.

パラメータ

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

注意:
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.

戻り値

The new SyncMutex object.

エラー / 例外

An exception is thrown if the mutex cannot be created or opened.

例

例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();
?>

例2 SyncMutex::__construct unnamed mutex example

<?php
$mutex = new SyncMutex();

$mutex->lock();

/* ... */

$mutex->unlock();
?>

参考

SyncMutex::lock
SyncMutex::unlock