framework/mutex/Mutex.php
public function release($name)
    {
        if ($this->releaseLock($name)) {
            $index = array_search($name, $this->_locks);
            if ($index !== false) {
                unset($this->_locks[$index]);
            }

            return true;
        }

        return false;
    }
public function release($name)
    {
        if ($this->releaseLock($name)) {
            $index = array_search($name, $this->_locks);
            if ($index !== false) {
                unset($this->_locks[$index]);
            }

            return true;
        }

        return false;
    }
Releases acquired lock. This method will return false in case the lock was not found.
@param string $name of the lock to be released. This lock must already exist.
@return bool lock release result: false in case named lock was not found..