コード例 #1
0
ファイル: AsynchIO.cpp プロジェクト: gregerts/debian-qpid-cpp
/*
 * We keep on reading as long as we have something to read, a buffer
 * to put it in and reading is not stopped by flow control.
 */
void AsynchIO::readable(DispatchHandle& h) {
    AbsTime readStartTime = AbsTime::now();
    size_t total = 0;
    int readCalls = 0;
    do {
        // (Try to) get a buffer
        if (!bufferQueue.empty()) {
            // Read into buffer
            BufferBase* buff = bufferQueue.front();
            assert(buff);
            bufferQueue.pop_front();
            errno = 0;
            int readCount = buff->byteCount-buff->dataCount;
            int rc = socket.read(buff->bytes + buff->dataCount, readCount);
            int64_t duration = Duration(readStartTime, AbsTime::now());
            ++readCalls;
            if (rc > 0) {
                buff->dataCount += rc;
                threadReadTotal += rc;
                total += rc;

                readCallback(*this, buff);
                if (rc != readCount) {
                    // If we didn't fill the read buffer then time to stop reading
                    QPID_PROBE4(asynchio_read_finished_done, &h, duration, total, readCalls);
                    break;
                }

                // Stop reading if we've overrun our timeslot
                if ( duration > threadMaxIoTimeNs) {
                    QPID_PROBE4(asynchio_read_finished_maxtime, &h, duration, total, readCalls);
                    break;
                }

            } else {
                // Put buffer back (at front so it doesn't interfere with unread buffers)
                bufferQueue.push_front(buff);
                assert(buff);

                QPID_PROBE5(asynchio_read_finished_error, &h, duration, total, readCalls, errno);
                // Eof or other side has gone away
                if (rc == 0 || errno == ECONNRESET) {
                    eofCallback(*this);
                    h.unwatchRead();
                    break;
                } else if (errno == EAGAIN) {
                    // We have just put a buffer back so we know
                    // we can carry on watching for reads
                    break;
                } else {
                    // Report error then just treat as a socket disconnect
                    QPID_LOG(error, "Error reading socket: " << qpid::sys::strError(errno) << "(" << errno << ")" );
                    eofCallback(*this);
                    h.unwatchRead();
                    break;
                }
            }
        } else {
            // Something to read but no buffer
            if (emptyCallback) {
                emptyCallback(*this);
            }
            // If we still have no buffers we can't do anything more
            if (bufferQueue.empty()) {
                h.unwatchRead();
                QPID_PROBE4(asynchio_read_finished_nobuffers, &h, Duration(readStartTime, AbsTime::now()), total, readCalls);
                break;
            }

        }
    } while (true);

    ++threadReadCount;
    return;
}
コード例 #2
0
ファイル: SslIo.cpp プロジェクト: cajus/qpid-cpp-debian
/*
 * We keep on reading as long as we have something to read and a buffer to put
 * it in
 */
void SslIO::readable(DispatchHandle& h) {
    AbsTime readStartTime = AbsTime::now();
    do {
        // (Try to) get a buffer
        if (!bufferQueue.empty()) {
            // Read into buffer
            BufferBase* buff = bufferQueue.front();
            assert(buff);
            bufferQueue.pop_front();
            errno = 0;
            int readCount = buff->byteCount-buff->dataCount;
            int rc = socket.read(buff->bytes + buff->dataCount, readCount);
            if (rc > 0) {
                buff->dataCount += rc;
                threadReadTotal += rc;

                readCallback(*this, buff);
                if (rc != readCount) {
                    // If we didn't fill the read buffer then time to stop reading
                    break;
                }

                // Stop reading if we've overrun our timeslot
                if (Duration(readStartTime, AbsTime::now()) > threadMaxIoTimeNs) {
                    break;
                }

            } else {
                // Put buffer back (at front so it doesn't interfere with unread buffers)
                bufferQueue.push_front(buff);
                assert(buff);

                // Eof or other side has gone away
                if (rc == 0 || errno == ECONNRESET) {
                    eofCallback(*this);
                    h.unwatchRead();
                    break;
                } else if (errno == EAGAIN) {
                    // We have just put a buffer back so we know
                    // we can carry on watching for reads
                    break;
                } else {
                    // Report error then just treat as a socket disconnect
                    QPID_LOG(error, "Error reading socket: " << getErrorString(PR_GetError()));
                    eofCallback(*this);
                    h.unwatchRead();
                    break;
                }
            }
        } else {
            // Something to read but no buffer
            if (emptyCallback) {
                emptyCallback(*this);
            }
            // If we still have no buffers we can't do anything more
            if (bufferQueue.empty()) {
                h.unwatchRead();
                break;
            }

        }
    } while (true);

    ++threadReadCount;
    return;
}