Method Add

src/plugins/httpdatastream/HttpDataStream.cpp:173–177

        }

        void Add(PositionType length) {
            std::unique_lock<std::mutex> lock(this->mutex);
            this->length += length;
            this->underflow.notify_all();
        }

        void Completed() {
            std::unique_lock<std::mutex> lock(this->mutex);