# File src/DbPool.rb, line 164
                def freeConnection(usedConn)
                        conn = nil
                        @classMutex.synchronize {
                                conn = @pool.find do |conn|
                                        conn == usedConn
                                end
                        }
                        if conn
                                conn.status = :IDLE
                                @connectionFreed.signal
                        else
                                raise MissingConnectionException
                        end

                        conn.status
                end