/**
* Advisory file locking.
*
* This method is called in response to flock(), when file_put_contents()
* (when flags contains LOCK_EX), stream_set_blocking() and when closing the
* stream (LOCK_UN).
*
* $operation is one of the following:
* LOCK_SH to acquire a shared lock (reader).
* LOCK_EX to acquire an exclusive lock (writer).
* LOCK_UN to release a lock (shared or exclusive).
* LOCK_NB if you don't want flock() to block while locking.
*
* @param integer $operation One of the LOCK_* constants
* @return boolean TRUE on success or FALSE on failure.
*/
public function stream_lock($operation)
{
if ($operation === LOCK_UN) {
return $this->streamWrapper->unlock();
} else {
return $this->streamWrapper->lock($operation);
}
}
