function releaseMutex($filename) {
		$ret = flock($this->fplock[md5($filename)], LOCK_UN);
		fclose($this->fplock[md5($filename)]);
		unset($this->fplock[md5($filename)]);
		if (! $ret) {
			$this->debug("Not able to release lock for $filename");
		}
		return $ret;
	}
function releaseMutex($filename) {
		$ret = flock($this->fplock[md5($filename)], LOCK_UN);
		fclose($this->fplock[md5($filename)]);
		unset($this->fplock[md5($filename)]);
		if (! $ret) {
			$this->debug("Not able to release lock for $filename");
		}
		return $ret;
	}
function releaseMutex ( $ filename ) { $ ret = flock ( $ this -> fplock [ md5 ( $ filename ) ] , LOCK_UN ) ; fclose ( $ this -> fplock [ md5 ( $ filename ) ] ) ; unset ( $ this -> fplock [ md5 ( $ filename ) ] ) ; if ( ! $ ret ) { $ this -> debug ( "Not able to release lock for $filename" ) ; } return $ ret ; }
releases the local mutex

@param string $filename The Filename of the Cache to lock
@return boolean Lock successfully released
@access private
releases the local mutex