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SyncMutex::lock

(PECL sync >= 1.0.0)

SyncMutex::lock — Waits for an exclusive lock

说明

public SyncMutex::lock(int $wait = -1): bool

Obtains an exclusive lock on a SyncMutex object. If the lock is already acquired, then this increments an internal counter.

参数

wait
The number of milliseconds to wait for the exclusive lock. A value of -1 is infinite.

返回值

成功时返回 true， 或者在失败时返回 false。

示例

示例 #1 SyncMutex::lock() example

<?php
$mutex = new SyncMutex("UniqueName");

if (!$mutex->lock(3000))
{
echo "Unable to lock mutex.";

exit();
}

/* ... */

$mutex->unlock();
?>

参见