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.

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.

返回值

The new SyncMutex object.

错误／异常

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

范例

示例 #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();
?>

示例 #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

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官方地址：https://www.php.net/manual/en/syncmutex.construct.php

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SyncMutex::__construct

说明

参数

返回值

错误／异常

范例

参见

User Contributed Notes