SyncMutex::lock
(PECL sync >= 1.0.0)
SyncMutex::lock — Waits for an exclusive lock
说明
public SyncMutex::lock(int
$wait = -1): boolObtains 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。
范例
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
- SyncMutex::unlock() - Unlocks the mutex
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