protected function _lock()
	{
		$this->_db->lockTable($this->_tbl);
		$this->_locked = true;

		return true;
	}
protected function _lock()
	{
		$this->_db->lockTable($this->_tbl);
		$this->_locked = true;

		return true;
	}
protected function _lock ( ) { $ this -> _db -> lockTable ( $ this -> _tbl ) ; $ this -> _locked = true ; return true ; }
Method to lock the database table for writing.

@return  boolean  True on success.
@since   2.1.12
@throws  Exception
Method to lock the database table for writing .