Waits for an exclusive lock

# SyncMutex::lock

(PECL sync >= 1.0.0)

SyncMutex::lock — Waits for an exclusive lock

### Description

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.

### Parameters

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

### Return Values

Returns `true` on success or `false` on failure.

### Examples

Example #1 SyncMutex::lock() example

`<?php
$mutex = new SyncMutex("UniqueName");
if (!$mutex->lock(3000))
{
echo "Unable to lock mutex.";
exit();
}
/* ... */
$mutex->unlock();
?>`

### See Also

- SyncMutex::unlock() - Unlocks the mutex

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open