SyncMutex::lock

(PECL sync >= 1.0.0)

SyncMutex::lock — Waits for an exclusive lock

说明

public bool SyncMutex::lock ([ integer $wait ] )

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

A boolean of TRUE if the lock was obtained, FALSE otherwise.

范例

Example #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