# SyncReaderWriter::writelock

(PECL sync >= 1.0.0)

SyncReaderWriter::writelock — Waits for an exclusive write lock

### Descripción

public SyncReaderWriter::writelock(int `$wait` = -1): bool

Obtains an exclusive write lock on a SyncReaderWriter object.

### Parámetros

`wait`

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

### Valores devueltos

Devuelve `true` en caso de éxito o `false` en caso de error.

### Ejemplos

Ejemplo #1 SyncReaderWriter::writelock() example

`<?php
$readwrite = new SyncReaderWriter("FileCacheLock");
$readwrite->writelock();
/* ... */
$readwrite->writeunlock();
?>`

### Ver también

- SyncReaderWriter::writeunlock() - Releases a write lock