diff options
Diffstat (limited to 'Final/cpp/lib/common/sys/posix/EventChannelConnection.cpp')
-rw-r--r-- | Final/cpp/lib/common/sys/posix/EventChannelConnection.cpp | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/Final/cpp/lib/common/sys/posix/EventChannelConnection.cpp b/Final/cpp/lib/common/sys/posix/EventChannelConnection.cpp deleted file mode 100644 index 85014b7bd4..0000000000 --- a/Final/cpp/lib/common/sys/posix/EventChannelConnection.cpp +++ /dev/null @@ -1,232 +0,0 @@ -/* - * - * Licensed to the Apache Software Foundation (ASF) under one - * or more contributor license agreements. See the NOTICE file - * distributed with this work for additional information - * regarding copyright ownership. The ASF licenses this file - * to you under the Apache License, Version 2.0 (the - * "License"); you may not use this file except in compliance - * with the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, - * software distributed under the License is distributed on an - * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY - * KIND, either express or implied. See the License for the - * specific language governing permissions and limitations - * under the License. - * - */ - -#include <iostream> - -#include <boost/bind.hpp> -#include <boost/assert.hpp> - -#include "EventChannelConnection.h" -#include "sys/SessionHandlerFactory.h" -#include "QpidError.h" - -using namespace std; -using namespace qpid; -using namespace qpid::framing; - -namespace qpid { -namespace sys { - -const size_t EventChannelConnection::bufferSize = 65536; - -EventChannelConnection::EventChannelConnection( - EventChannelThreads::shared_ptr threads_, - SessionHandlerFactory& factory_, - int rfd, - int wfd, - bool isTrace_ -) : - readFd(rfd), - writeFd(wfd ? wfd : rfd), - readCallback(boost::bind(&EventChannelConnection::closeOnException, - this, &EventChannelConnection::endInitRead)), - - isWriting(false), - isClosed(false), - threads(threads_), - handler(factory_.create(this)), - in(bufferSize), - out(bufferSize), - isTrace(isTrace_) -{ - BOOST_ASSERT(readFd > 0); - BOOST_ASSERT(writeFd > 0); - closeOnException(&EventChannelConnection::startRead); -} - - -void EventChannelConnection::send(std::auto_ptr<AMQFrame> frame) { - { - Monitor::ScopedLock lock(monitor); - assert(frame.get()); - writeFrames.push_back(frame.release()); - } - closeOnException(&EventChannelConnection::startWrite); -} - -void EventChannelConnection::close() { - { - Monitor::ScopedLock lock(monitor); - if (isClosed) - return; - isClosed = true; - } - ::close(readFd); - ::close(writeFd); - { - Monitor::ScopedLock lock(monitor); - while (busyThreads > 0) - monitor.wait(); - } - handler->closed(); -} - -void EventChannelConnection::closeNoThrow() { - Exception::tryCatchLog<void>( - boost::bind(&EventChannelConnection::close, this), - false, - "Exception closing channel" - ); -} - -/** - * Call f in a try/catch block and close the connection if - * an exception is thrown. - */ -void EventChannelConnection::closeOnException(MemberFnPtr f) -{ - try { - Exception::tryCatchLog<void>( - boost::bind(f, this), - "Closing connection due to exception" - ); - return; - } catch (...) { - // Exception was already logged by tryCatchLog - closeNoThrow(); - } -} - -// Post the write event. -// Always called inside closeOnException. -// Called by endWrite and send, but only one thread writes at a time. -// -void EventChannelConnection::startWrite() { - FrameQueue::auto_type frame; - { - Monitor::ScopedLock lock(monitor); - // Stop if closed or a write event is already in progress. - if (isClosed || isWriting) - return; - if (writeFrames.empty()) { - isWriting = false; - return; - } - isWriting = true; - frame = writeFrames.pop_front(); - } - // No need to lock here - only one thread can be writing at a time. - out.clear(); - if (isTrace) - cout << "Send on socket " << writeFd << ": " << *frame << endl; - frame->encode(out); - out.flip(); - writeEvent = WriteEvent( - writeFd, out.start(), out.available(), - boost::bind(&EventChannelConnection::closeOnException, - this, &EventChannelConnection::endWrite)); - threads->post(writeEvent); -} - -// ScopedBusy ctor increments busyThreads. -// dtor decrements and calls monitor.notifyAll if it reaches 0. -// -struct EventChannelConnection::ScopedBusy : public AtomicCount::ScopedIncrement -{ - ScopedBusy(EventChannelConnection& ecc) - : AtomicCount::ScopedIncrement( - ecc.busyThreads, boost::bind(&Monitor::notifyAll, &ecc.monitor)) - {} -}; - -// Write event completed. -// Always called by a channel thread inside closeOnException. -// -void EventChannelConnection::endWrite() { - ScopedBusy(*this); - { - Monitor::ScopedLock lock(monitor); - isWriting = false; - if (isClosed) - return; - writeEvent.throwIfException(); - } - // Check if there's more in to write in the write queue. - startWrite(); -} - - -// Post the read event. -// Always called inside closeOnException. -// Called from ctor and end[Init]Read, so only one call at a time -// is possible since we only post one read event at a time. -// -void EventChannelConnection::startRead() { - // Non blocking read, as much as we can swallow. - readEvent = ReadEvent( - readFd, in.start(), in.available(), readCallback,true); - threads->post(readEvent); -} - -// Completion of initial read, expect protocolInit. -// Always called inside closeOnException in channel thread. -// Only called by one thread at a time. -void EventChannelConnection::endInitRead() { - ScopedBusy(*this); - if (!isClosed) { - readEvent.throwIfException(); - in.move(readEvent.getBytesRead()); - in.flip(); - ProtocolInitiation protocolInit; - if(protocolInit.decode(in)){ - handler->initiated(&protocolInit); - readCallback = boost::bind( - &EventChannelConnection::closeOnException, - this, &EventChannelConnection::endRead); - } - in.compact(); - // Continue reading. - startRead(); - } -} - -// Normal reads, expect a frame. -// Always called inside closeOnException in channel thread. -void EventChannelConnection::endRead() { - ScopedBusy(*this); - if (!isClosed) { - readEvent.throwIfException(); - in.move(readEvent.getBytesRead()); - in.flip(); - AMQFrame frame; - while (frame.decode(in)) { - // TODO aconway 2006-11-30: received should take Frame& - if (isTrace) - cout << "Received on socket " << readFd - << ": " << frame << endl; - handler->received(&frame); - } - in.compact(); - startRead(); - } -} - -}} // namespace qpid::sys |