Revert "Fix to allow transceivers to read more data than requested."

This reverts commit 9c4e79ce6760badf047568fd300fcbe3455f31b7.

23 files changed, 64 insertions, 331 deletions

diff --git a/cpp/src/Ice/ConnectionI.cpp b/cpp/src/Ice/ConnectionI.cpp
index 9abb600eae2..8091d2f2233 100644
--- a/cpp/src/Ice/ConnectionI.cpp
+++ b/cpp/src/Ice/ConnectionI.cpp
@@ -1366,7 +1366,7 @@ Ice::ConnectionI::message(ThreadPoolCurrent& current)
             {
                 if(_readHeader) // Read header if necessary.
                 {
-                    if(_readStream.i != _readStream.b.end() && !_transceiver->read(_readStream, _hasMoreData))
+                    if(_readStream.i != _readStream.b.end() && !_transceiver->read(_readStream))
                     {
                         return;
                     }   
@@ -1437,7 +1437,7 @@ Ice::ConnectionI::message(ThreadPoolCurrent& current)
                             _observer.startRead(_readStream.i);
                         }
 
-                        if(!_transceiver->read(_readStream, _hasMoreData))
+                        if(!_transceiver->read(_readStream))
                         {
                             assert(!_readStream.b.empty());
                             scheduleTimeout(SocketOperationRead, _endpoint->timeout());
@@ -2135,8 +2135,7 @@ Ice::ConnectionI::setState(State state)
             }
             if(_state == StateHolding)
             {
-                // We need to continue to read in closing state.
-                _threadPool->_register(this, SocketOperationRead);
+                _threadPool->_register(this, SocketOperationRead); // We need to continue to read in closing state.
             }
             break;
         }
@@ -2281,7 +2280,7 @@ Ice::ConnectionI::initiateShutdown()
 bool
 Ice::ConnectionI::initialize(SocketOperation operation)
 {
-    SocketOperation s = _transceiver->initialize(_readStream, _writeStream, _hasMoreData);
+    SocketOperation s = _transceiver->initialize(_readStream, _writeStream);
     if(s != SocketOperationNone)
     {
         scheduleTimeout(s, connectTimeout());
@@ -2350,7 +2349,7 @@ Ice::ConnectionI::validate(SocketOperation operation)
                 _observer.startRead(_readStream.i);
             }
 
-            if(_readStream.i != _readStream.b.end() && !_transceiver->read(_readStream, _hasMoreData))
+            if(_readStream.i != _readStream.b.end() && !_transceiver->read(_readStream))
             {
                 scheduleTimeout(SocketOperationRead, connectTimeout());
                 _threadPool->update(this, operation, SocketOperationRead);
diff --git a/cpp/src/Ice/EventHandler.cpp b/cpp/src/Ice/EventHandler.cpp
index 413d44c2e32..f0505a8b7db 100644
--- a/cpp/src/Ice/EventHandler.cpp
+++ b/cpp/src/Ice/EventHandler.cpp
@@ -25,7 +25,6 @@ IceInternal::EventHandler::EventHandler() :
 #else
     _disabled(SocketOperationNone),
 #endif
-    _hasMoreData(false),
     _registered(SocketOperationNone)
 {
 }
diff --git a/cpp/src/Ice/EventHandler.h b/cpp/src/Ice/EventHandler.h
index 565e963a11f..7e51f0e9159 100644
--- a/cpp/src/Ice/EventHandler.h
+++ b/cpp/src/Ice/EventHandler.h
@@ -65,7 +65,6 @@ protected:
 #else
     SocketOperation _disabled;
 #endif
-    bool _hasMoreData;
     SocketOperation _registered;
 
     friend class ThreadPool;
diff --git a/cpp/src/Ice/Network.cpp b/cpp/src/Ice/Network.cpp
index 0b280166a37..987ba372326 100644
--- a/cpp/src/Ice/Network.cpp
+++ b/cpp/src/Ice/Network.cpp
@@ -543,24 +543,6 @@ IceInternal::AsyncInfo::AsyncInfo(SocketOperation s)
     ZeroMemory(this, sizeof(AsyncInfo));
     status = s;
 }
-
-void
-IceInternal::NativeInfo::initialize(HANDLE handle, ULONG_PTR key)
-{
-    _handle = handle;
-    _key = key;
-}
-
-void
-IceInternal::NativeInfo::completed(SocketOperation operation)
-{
-    if(!PostQueuedCompletionStatus(_handle, 0, _key, getAsyncInfo(operation)))
-    {
-        Ice::SocketException ex(__FILE__, __LINE__);
-        ex.error = GetLastError();
-        throw ex;
-    }
-}
 #endif
 
 IceUtil::Shared* IceInternal::upCast(NetworkProxy* p) { return p; }
diff --git a/cpp/src/Ice/Network.h b/cpp/src/Ice/Network.h
index c9416ee4ef6..4f045031dc5 100644
--- a/cpp/src/Ice/Network.h
+++ b/cpp/src/Ice/Network.h
@@ -178,8 +178,6 @@ public:
     //
 #if defined(ICE_USE_IOCP)
     virtual AsyncInfo* getAsyncInfo(SocketOperation) = 0;
-    void initialize(HANDLE, ULONG_PTR);
-    void completed(SocketOperation operation);
 #elif defined(ICE_OS_WINRT)
     virtual void setCompletedHandler(SocketOperationCompletedHandler^) = 0;
 #endif
@@ -187,11 +185,6 @@ public:
 protected:
 
     SOCKET _fd;
-
-#if defined(ICE_USE_IOCP)
-    HANDLE _handle;
-    ULONG_PTR _key;
-#endif
 };
 typedef IceUtil::Handle<NativeInfo> NativeInfoPtr;
 
diff --git a/cpp/src/Ice/Selector.cpp b/cpp/src/Ice/Selector.cpp
index 48de01df197..c9763d6e2a9 100644
--- a/cpp/src/Ice/Selector.cpp
+++ b/cpp/src/Ice/Selector.cpp
@@ -140,7 +140,6 @@ Selector::initialize(EventHandler* handler)
         throw ex;
     }
     handler->__incRef();
-    handler->getNativeInfo()->initialize(_handle, reinterpret_cast<ULONG_PTR>(handler));
 }
 
 void
@@ -483,6 +482,7 @@ Selector::select(vector<pair<EventHandler*, SocketOperation> >& handlers, int ti
     }
 
     assert(ret > 0);
+    handlers.clear();
     for(int i = 0; i < ret; ++i)
     {
         pair<EventHandler*, SocketOperation> p;
@@ -701,6 +701,7 @@ Selector::select(vector<pair<EventHandler*, SocketOperation> >& handlers, int ti
     }
 
     assert(ret > 0);
+    handlers.clear();
 
 #if defined(ICE_USE_SELECT)
     if(_selectedReadFdSet.fd_count == 0 && _selectedWriteFdSet.fd_count == 0 && _selectedErrorFdSet.fd_count == 0)
diff --git a/cpp/src/Ice/TcpTransceiver.cpp b/cpp/src/Ice/TcpTransceiver.cpp
index c29391fa9da..d82fafa17ce 100644
--- a/cpp/src/Ice/TcpTransceiver.cpp
+++ b/cpp/src/Ice/TcpTransceiver.cpp
@@ -46,7 +46,7 @@ IceInternal::TcpTransceiver::getAsyncInfo(SocketOperation status)
 #endif
 
 SocketOperation
-IceInternal::TcpTransceiver::initialize(Buffer& readBuffer, Buffer& writeBuffer, bool& hasMoreData)
+IceInternal::TcpTransceiver::initialize(Buffer& readBuffer, Buffer& writeBuffer)
 {
     try
     {
@@ -93,7 +93,7 @@ IceInternal::TcpTransceiver::initialize(Buffer& readBuffer, Buffer& writeBuffer,
                     //
                     // Try to read the response.
                     //
-                    if(read(readBuffer, hasMoreData))
+                    if(read(readBuffer))
                     {
                         //
                         // Read completed without blocking - fall through.
@@ -268,7 +268,7 @@ IceInternal::TcpTransceiver::write(Buffer& buf)
 }
 
 bool
-IceInternal::TcpTransceiver::read(Buffer& buf, bool&)
+IceInternal::TcpTransceiver::read(Buffer& buf)
 {
     //
     // It's impossible for packetSize to be more than an Int.
diff --git a/cpp/src/Ice/TcpTransceiver.h b/cpp/src/Ice/TcpTransceiver.h
index 5faad7b9a46..a2afe4bb514 100644
--- a/cpp/src/Ice/TcpTransceiver.h
+++ b/cpp/src/Ice/TcpTransceiver.h
@@ -41,10 +41,10 @@ public:
     virtual AsyncInfo* getAsyncInfo(SocketOperation);
 #endif
     
-    virtual SocketOperation initialize(Buffer&, Buffer&, bool&);
+    virtual SocketOperation initialize(Buffer&, Buffer&);
     virtual void close();
     virtual bool write(Buffer&);
-    virtual bool read(Buffer&, bool&);
+    virtual bool read(Buffer&);
 #ifdef ICE_USE_IOCP
     virtual bool startWrite(Buffer&);
     virtual void finishWrite(Buffer&);
diff --git a/cpp/src/Ice/ThreadPool.cpp b/cpp/src/Ice/ThreadPool.cpp
index 32b7bbddde6..62652c786d2 100644
--- a/cpp/src/Ice/ThreadPool.cpp
+++ b/cpp/src/Ice/ThreadPool.cpp
@@ -108,29 +108,6 @@ private:
     IceUtil::ThreadPtr _thread;
 };
 
-class InterruptWorkItem : public ThreadPoolWorkItem
-{
-public:
-
-    virtual void
-    execute(ThreadPoolCurrent& current)
-    {
-        // Nothing to do, this is just used to interrupt the thread pool selector.
-    }
-};
-ThreadPoolWorkItemPtr interruptWorkItem;
-
-class InterruptWorkItemInit
-{
-public:
-
-    InterruptWorkItemInit()
-    {
-        interruptWorkItem = new InterruptWorkItem;
-    }
-};
-InterruptWorkItemInit init;
-
 //
 // Exception raised by the thread pool work queue when the thread pool
 // is destroyed.
@@ -585,20 +562,6 @@ IceInternal::ThreadPool::update(const EventHandlerPtr& handler, SocketOperation
     Lock sync(*this);
     assert(!_destroyed);
     _selector.update(handler.get(), remove, add);
-#if !defined(ICE_USE_IOCP) && !defined(ICE_OS_WINRT)
-    if(add & SocketOperationRead && handler->_hasMoreData)
-    {
-        if(_pendingHandlers.empty())
-        {
-            _workQueue->queue(interruptWorkItem); // Interrupt select()
-        }
-       _pendingHandlers.insert(handler.get());
-    }
-    else if(remove & SocketOperationRead)
-    {
-        _pendingHandlers.erase(handler.get());
-    }
-#endif
 }
 
 void
@@ -614,8 +577,8 @@ IceInternal::ThreadPool::finish(const EventHandlerPtr& handler)
     // Clear the current ready handlers. The handlers from this vector can't be 
     // reference counted and a handler might get destroyed once it's finished.
     //
-    //_handlers.clear();
-    //_nextHandler = _handlers.end();
+    _handlers.clear();
+    _nextHandler = _handlers.end();
 #else
     // If there are no pending asynchronous operations, we can call finish on the handler now.
     if(!handler->_pending)
@@ -719,19 +682,6 @@ IceInternal::ThreadPool::run(const EventHandlerThreadPtr& thread)
                 if(select)
                 {
                     _handlers.swap(handlers);
-                    if(!_pendingHandlers.empty())
-                    {
-                        for(_nextHandler = _handlers.begin(); _nextHandler != _handlers.end(); ++_nextHandler)
-                        {
-                            _pendingHandlers.erase(_nextHandler->first);
-                        }
-                        set<EventHandler*>::const_iterator p;
-                        for(p = _pendingHandlers.begin(); p != _pendingHandlers.end(); ++p)
-                        {
-                            _handlers.push_back(make_pair(*p, SocketOperationRead));
-                        }
-                        _pendingHandlers.clear();
-                    }
                     _nextHandler = _handlers.begin();
                     _selector.finishSelect();
                     select = false;
@@ -750,14 +700,6 @@ IceInternal::ThreadPool::run(const EventHandlerThreadPtr& thread)
                     // the IO thread count now.
                     //
                     --_inUseIO;
-                    if(current._handler->_hasMoreData && current._handler->_registered & SocketOperationRead)
-                    {
-                        if(_pendingHandlers.empty())
-                        {
-                            _workQueue->queue(interruptWorkItem); // Interrupt select()
-                        }
-                        _pendingHandlers.insert(current._handler.get());
-                    }
                 }
                 else
                 {
@@ -765,18 +707,7 @@ IceInternal::ThreadPool::run(const EventHandlerThreadPtr& thread)
                     // If the handler called ioCompleted(), we re-enable the handler in
                     // case it was disabled and we decrease the number of thread in use.
                     //
-                    if(_serialize)
-                    {
-                        _selector.enable(current._handler.get(), current.operation);
-                        if(current._handler->_hasMoreData && current._handler->_registered & SocketOperationRead)
-                        {
-                            if(_pendingHandlers.empty())
-                            {
-                                _workQueue->queue(interruptWorkItem); // Interrupt select()
-                            }
-                            _pendingHandlers.insert(current._handler.get());
-                        }
-                    }
+                    _selector.enable(current._handler.get(), current.operation);
                     assert(_inUse > 0);
                     --_inUse;
                 }
@@ -786,22 +717,10 @@ IceInternal::ThreadPool::run(const EventHandlerThreadPtr& thread)
                     return; // Wait timed-out.
                 }
             }
-            else if(current._handler->_hasMoreData && current._handler->_registered & SocketOperationRead)
-            {
-                if(_pendingHandlers.empty())
-                {
-                    _workQueue->queue(interruptWorkItem); // Interrupt select()
-                }
-                _pendingHandlers.insert(current._handler.get());
-            }
 
             //
             // Get the next ready handler.
             //
-            while(_nextHandler != _handlers.end() && !(_nextHandler->second & _nextHandler->first->_registered))
-            {
-                ++_nextHandler;
-            }
             if(_nextHandler != _handlers.end())
             {
                 current._ioCompleted = false;
@@ -829,7 +748,6 @@ IceInternal::ThreadPool::run(const EventHandlerThreadPtr& thread)
                 }
                 else
                 {
-                    _handlers.clear();
                     _selector.startSelect();
                     select = true;
                     thread->setState(ThreadStateIdle);
@@ -971,25 +889,13 @@ IceInternal::ThreadPool::ioCompleted(ThreadPoolCurrent& current)
 
     if(_sizeMax > 1)
     {
-        
 #if !defined(ICE_USE_IOCP) && !defined(ICE_OS_WINRT)
         --_inUseIO;
-
-        if(!_destroyed)
+        
+        if(_serialize && !_destroyed)
         {
-            if(_serialize)
-            {
-                _selector.disable(current._handler.get(), current.operation);
-            }
-            else if(current._handler->_hasMoreData && current._handler->_registered & SocketOperationRead)
-            {
-                if(_pendingHandlers.empty())
-                {
-                    _workQueue->queue(interruptWorkItem); // Interrupt select()
-                }
-                _pendingHandlers.insert(current._handler.get());
-            }
-        }
+            _selector.disable(current._handler.get(), current.operation);
+        }    
 
         if(current._leader)
         {
diff --git a/cpp/src/Ice/ThreadPool.h b/cpp/src/Ice/ThreadPool.h
index cf8a6d926b4..43a8f2fb361 100644
--- a/cpp/src/Ice/ThreadPool.h
+++ b/cpp/src/Ice/ThreadPool.h
@@ -127,7 +127,6 @@ private:
     std::vector<std::pair<EventHandler*, SocketOperation> > _handlers;
     std::vector<std::pair<EventHandler*, SocketOperation> >::const_iterator _nextHandler;
 #endif
-    std::set<EventHandler*> _pendingHandlers;
 
     bool _promote;
 };
diff --git a/cpp/src/Ice/Transceiver.h b/cpp/src/Ice/Transceiver.h
index c1f6aa64b03..c2c00cf151d 100644
--- a/cpp/src/Ice/Transceiver.h
+++ b/cpp/src/Ice/Transceiver.h
@@ -25,10 +25,10 @@ class ICE_API Transceiver : virtual public ::IceUtil::Shared
 public:
     
     virtual NativeInfoPtr getNativeInfo() = 0;
-    virtual SocketOperation initialize(Buffer&, Buffer&, bool&) = 0;
+    virtual SocketOperation initialize(Buffer&, Buffer&) = 0;
     virtual void close() = 0;
     virtual bool write(Buffer&) = 0;
-    virtual bool read(Buffer&, bool&) = 0;
+    virtual bool read(Buffer&) = 0;
 #if defined(ICE_USE_IOCP) || defined(ICE_OS_WINRT)
     virtual bool startWrite(Buffer&) = 0;
     virtual void finishWrite(Buffer&) = 0;
diff --git a/cpp/src/Ice/UdpTransceiver.cpp b/cpp/src/Ice/UdpTransceiver.cpp
index 53d0901228c..ded61171571 100644
--- a/cpp/src/Ice/UdpTransceiver.cpp
+++ b/cpp/src/Ice/UdpTransceiver.cpp
@@ -80,7 +80,7 @@ IceInternal::UdpTransceiver::setCompletedHandler(SocketOperationCompletedHandler
 #endif
 
 SocketOperation
-IceInternal::UdpTransceiver::initialize(Buffer& /*readBuffer*/, Buffer& /*writeBuffer*/, bool& /*hasMoreData*/)
+IceInternal::UdpTransceiver::initialize(Buffer& /*readBuffer*/, Buffer& /*writeBuffer*/)
 {
     if(_state == StateNeedConnect)
     {
@@ -243,13 +243,13 @@ repeat:
 
 #ifdef ICE_OS_WINRT
 bool
-IceInternal::UdpTransceiver::read(Buffer&, bool&)
+IceInternal::UdpTransceiver::read(Buffer&)
 {
     return false;
 }
 #else
 bool
-IceInternal::UdpTransceiver::read(Buffer& buf, bool&)
+IceInternal::UdpTransceiver::read(Buffer& buf)
 {
     assert(buf.i == buf.b.begin());
     assert(_fd != INVALID_SOCKET);
diff --git a/cpp/src/Ice/UdpTransceiver.h b/cpp/src/Ice/UdpTransceiver.h
index 9768ff79a2d..ad6bf128619 100644
--- a/cpp/src/Ice/UdpTransceiver.h
+++ b/cpp/src/Ice/UdpTransceiver.h
@@ -47,10 +47,10 @@ public:
     virtual void setCompletedHandler(SocketOperationCompletedHandler^);
 #endif
 
-    virtual SocketOperation initialize(Buffer&, Buffer&, bool&);
+    virtual SocketOperation initialize(Buffer&, Buffer&);
     virtual void close();
     virtual bool write(Buffer&);
-    virtual bool read(Buffer&, bool&);
+    virtual bool read(Buffer&);
 #if defined(ICE_USE_IOCP) || defined(ICE_OS_WINRT)
     virtual bool startWrite(Buffer&);
     virtual void finishWrite(Buffer&);
diff --git a/cpp/src/IceSSL/TransceiverI.cpp b/cpp/src/IceSSL/TransceiverI.cpp
index f48395deda9..fbf683d947d 100644
--- a/cpp/src/IceSSL/TransceiverI.cpp
+++ b/cpp/src/IceSSL/TransceiverI.cpp
@@ -50,7 +50,7 @@ IceSSL::TransceiverI::getAsyncInfo(IceInternal::SocketOperation status)
 #endif
 
 IceInternal::SocketOperation
-IceSSL::TransceiverI::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& writeBuffer, bool&)
+IceSSL::TransceiverI::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& writeBuffer)
 {
     try
     {
@@ -557,7 +557,7 @@ IceSSL::TransceiverI::write(IceInternal::Buffer& buf)
 }
 
 bool
-IceSSL::TransceiverI::read(IceInternal::Buffer& buf, bool&)
+IceSSL::TransceiverI::read(IceInternal::Buffer& buf)
 {
     if(_state == StateProxyConnectRequestPending)
     {
diff --git a/cpp/src/IceSSL/TransceiverI.h b/cpp/src/IceSSL/TransceiverI.h
index 3b2b3a73937..2c475c8638e 100644
--- a/cpp/src/IceSSL/TransceiverI.h
+++ b/cpp/src/IceSSL/TransceiverI.h
@@ -46,10 +46,10 @@ public:
     virtual IceInternal::AsyncInfo* getAsyncInfo(IceInternal::SocketOperation);
 #endif
 
-    virtual IceInternal::SocketOperation initialize(IceInternal::Buffer&, IceInternal::Buffer&, bool&);
+    virtual IceInternal::SocketOperation initialize(IceInternal::Buffer&, IceInternal::Buffer&);
     virtual void close();
     virtual bool write(IceInternal::Buffer&);
-    virtual bool read(IceInternal::Buffer&, bool&);
+    virtual bool read(IceInternal::Buffer&);
 #ifdef ICE_USE_IOCP
     virtual bool startWrite(IceInternal::Buffer&);
     virtual void finishWrite(IceInternal::Buffer&);
diff --git a/cpp/test/Ice/background/AllTests.cpp b/cpp/test/Ice/background/AllTests.cpp
index b6db7300986..1d21b70379c 100644
--- a/cpp/test/Ice/background/AllTests.cpp
+++ b/cpp/test/Ice/background/AllTests.cpp
@@ -313,28 +313,6 @@ allTests(const Ice::CommunicatorPtr& communicator)
     }
     cout << "ok" << endl;
 
-    cout << "testing buffered transport... " << flush;
-    {
-        configuration->buffered(true);
-        backgroundController->buffered(true);
-        Ice::AsyncResultPtr r;
-        for(int i = 0; i < 10000; ++i)
-        {
-            r = background->begin_op();
-            if(i % 50 == 0)
-            {
-                backgroundController->holdAdapter();
-                backgroundController->resumeAdapter();
-            }
-            if(i % 100 == 0)
-            {
-                r->waitForCompleted();
-            }
-        }
-        r->waitForCompleted();
-    }
-    cout << "ok" << endl;
-
     return background;
 }
 
@@ -444,8 +422,9 @@ initializeTests(const ConfigurationPtr& configuration,
     {
         background->op();
     }
-    catch(const Ice::LocalException&)
+    catch(const Ice::LocalException& ex)
     {
+        cerr << ex << endl;
         test(false);
     }
     background->ice_getConnection()->close(false);
diff --git a/cpp/test/Ice/background/Configuration.cpp b/cpp/test/Ice/background/Configuration.cpp
index 45bc7872a6f..4a3e9498d04 100644
--- a/cpp/test/Ice/background/Configuration.cpp
+++ b/cpp/test/Ice/background/Configuration.cpp
@@ -15,8 +15,7 @@ Configuration::Configuration() :
     _initializeSocketOperation(IceInternal::SocketOperationNone),
     _initializeResetCount(0),
     _readReadyCount(0),
-    _writeReadyCount(0),
-    _buffered(false)
+    _writeReadyCount(0)
 {
     assert(!_instance);
     _instance = this;
@@ -175,20 +174,6 @@ Configuration::checkWriteException()
     }
 }
 
-void
-Configuration::buffered(bool buffered)
-{
-    Lock sync(*this);
-    _buffered = buffered;
-}
-
-bool
-Configuration::buffered()
-{
-    Lock sync(*this);
-    return _buffered;
-}
-
 Configuration*
 Configuration::getInstance()
 {
diff --git a/cpp/test/Ice/background/Configuration.h b/cpp/test/Ice/background/Configuration.h
index ddcedc2d3f9..9f0ff1ab634 100644
--- a/cpp/test/Ice/background/Configuration.h
+++ b/cpp/test/Ice/background/Configuration.h
@@ -25,30 +25,27 @@ public:
     Configuration();
     virtual ~Configuration();
 
-    void connectorsException(Ice::LocalException*);
-    void checkConnectorsException();
-
-    void connectException(Ice::LocalException*);
-    void checkConnectException();
-
-    void initializeSocketOperation(IceInternal::SocketOperation);
-    void initializeException(Ice::LocalException*);
-    IceInternal::SocketOperation initializeSocketOperation();
-    void checkInitializeException();
-
-    void readReady(bool);
-    void readException(Ice::LocalException*);
-    bool readReady();
-    void checkReadException();
-
-    void writeReady(bool);
-    void writeException(Ice::LocalException*);
-    bool writeReady();
-    void checkWriteException();
-
-    void buffered(bool);
-    bool buffered();
-    
+    virtual void connectorsException(Ice::LocalException*);
+    virtual void checkConnectorsException();
+
+    virtual void connectException(Ice::LocalException*);
+    virtual void checkConnectException();
+
+    virtual void initializeSocketOperation(IceInternal::SocketOperation);
+    virtual void initializeException(Ice::LocalException*);
+    virtual IceInternal::SocketOperation initializeSocketOperation();
+    virtual void checkInitializeException();
+
+    virtual void readReady(bool);
+    virtual void readException(Ice::LocalException*);
+    virtual bool readReady();
+    virtual void checkReadException();
+
+    virtual void writeReady(bool);
+    virtual void writeException(Ice::LocalException*);
+    virtual bool writeReady();
+    virtual void checkWriteException();
+
     static Configuration* getInstance();
 
 private:
@@ -62,7 +59,6 @@ private:
     IceUtil::UniquePtr<Ice::LocalException> _readException;
     int _writeReadyCount;
     IceUtil::UniquePtr<Ice::LocalException> _writeException;
-    bool _buffered;
 
     static Configuration* _instance;
 };
diff --git a/cpp/test/Ice/background/Test.ice b/cpp/test/Ice/background/Test.ice
index 2c2ece09398..6fff0d79750 100644
--- a/cpp/test/Ice/background/Test.ice
+++ b/cpp/test/Ice/background/Test.ice
@@ -39,8 +39,6 @@ interface BackgroundController
 
     void writeReady(bool enable);
     void writeException(bool enable);
-
-    void buffered(bool enable);
 };
 
 };
diff --git a/cpp/test/Ice/background/TestI.cpp b/cpp/test/Ice/background/TestI.cpp
index 0e6a44cc6cd..26cb121abb4 100644
--- a/cpp/test/Ice/background/TestI.cpp
+++ b/cpp/test/Ice/background/TestI.cpp
@@ -109,12 +109,6 @@ BackgroundControllerI::writeException(bool enable, const Ice::Current&)
     _configuration->writeException(enable ? new Ice::SocketException(__FILE__, __LINE__) : 0);
 }
     
-void
-BackgroundControllerI::buffered(bool enable, const Ice::Current&)
-{
-    _configuration->buffered(enable);
-}
-
 BackgroundControllerI::BackgroundControllerI(const Ice::ObjectAdapterPtr& adapter, 
                                              const ConfigurationPtr& configuration) :
     _adapter(adapter),
diff --git a/cpp/test/Ice/background/TestI.h b/cpp/test/Ice/background/TestI.h
index 34bc097808e..7dfe67d2fed 100644
--- a/cpp/test/Ice/background/TestI.h
+++ b/cpp/test/Ice/background/TestI.h
@@ -53,8 +53,6 @@ public:
     
     virtual void writeReady(bool, const Ice::Current&);
     virtual void writeException(bool, const Ice::Current&);
-
-    virtual void buffered(bool, const Ice::Current&);
     
     BackgroundControllerI(const Ice::ObjectAdapterPtr&, const ConfigurationPtr&);
 
diff --git a/cpp/test/Ice/background/Transceiver.cpp b/cpp/test/Ice/background/Transceiver.cpp
index 5260c7b024d..03e99934561 100644
--- a/cpp/test/Ice/background/Transceiver.cpp
+++ b/cpp/test/Ice/background/Transceiver.cpp
@@ -18,7 +18,7 @@ Transceiver::getNativeInfo()
 }
 
 IceInternal::SocketOperation
-Transceiver::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& writeBuffer, bool& hasMoreData)
+Transceiver::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& writeBuffer)
 {
 #ifndef ICE_USE_IOCP
     IceInternal::SocketOperation status = _configuration->initializeSocketOperation();
@@ -30,7 +30,7 @@ Transceiver::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& wr
     {
         if(!_initialized)
         {
-            status = _transceiver->initialize(readBuffer, writeBuffer, hasMoreData);
+            status = _transceiver->initialize(readBuffer, writeBuffer);
             if(status != IceInternal::SocketOperationNone)
             {
                 return status;
@@ -48,7 +48,7 @@ Transceiver::initialize(IceInternal::Buffer& readBuffer, IceInternal::Buffer& wr
     _configuration->checkInitializeException();
     if(!_initialized)
     {
-        IceInternal::SocketOperation status = _transceiver->initialize(readBuffer, writeBuffer, hasMoreData);
+        IceInternal::SocketOperation status = _transceiver->initialize(readBuffer, writeBuffer);
         if(status != IceInternal::SocketOperationNone)
         {
             return status;
@@ -77,7 +77,7 @@ Transceiver::write(IceInternal::Buffer& buf)
 }
 
 bool
-Transceiver::read(IceInternal::Buffer& buf, bool& moreData)
+Transceiver::read(IceInternal::Buffer& buf)
 {
     if(!_configuration->readReady())
     {
@@ -85,41 +85,7 @@ Transceiver::read(IceInternal::Buffer& buf, bool& moreData)
     }
 
     _configuration->checkReadException();
-
-    if(_configuration->buffered())
-    {
-        while(buf.i != buf.b.end())
-        {
-            if(_readBufferPos == _readBuffer.i)
-            {
-                _readBufferPos = _readBuffer.i = _readBuffer.b.begin();
-                _transceiver->read(_readBuffer, moreData);
-                if(_readBufferPos == _readBuffer.i)
-                {
-                    moreData = false;
-                    return false;
-                }
-            }
-            assert(_readBuffer.i > _readBufferPos);
-            size_t requested = buf.b.end() - buf.i;
-            size_t available = _readBuffer.i - _readBufferPos;
-            assert(available > 0);
-            if(available >= requested)
-            {
-                available = requested;
-            }
-
-            memcpy(buf.i, _readBufferPos, available);
-            _readBufferPos += available;
-            buf.i += available;
-        }
-        moreData = _readBufferPos < _readBuffer.i;
-        return true;
-    }
-    else
-    {
-        return _transceiver->read(buf, moreData);
-    }
+    return _transceiver->read(buf);
 }
 
 #ifdef ICE_USE_IOCP
@@ -141,67 +107,14 @@ void
 Transceiver::startRead(IceInternal::Buffer& buf)
 {
     _configuration->checkReadException();
-    if(_configuration->buffered())
-    {
-        size_t available = _readBuffer.i - _readBufferPos;
-        if(available > 0)
-        {
-            size_t requested = buf.b.end() - buf.i;
-            assert(available > 0);
-            if(available >= requested)
-            {
-                available = requested;
-            }
-            
-            memcpy(buf.i, _readBufferPos, available);
-            _readBufferPos += available;
-            buf.i += available;
-        }
-
-        if(_readBufferPos == _readBuffer.i && buf.i != buf.b.end())
-        {
-            _readBufferPos = _readBuffer.i = _readBuffer.b.begin();
-            _transceiver->startRead(_readBuffer);
-        }
-        else
-        {
-            _transceiver->getNativeInfo()->completed(IceInternal::SocketOperationRead);
-        }
-    }
-    else
-    {
-        _transceiver->startRead(buf);
-    }
+    _transceiver->startRead(buf);
 }
 
 void
 Transceiver::finishRead(IceInternal::Buffer& buf)
 {
     _configuration->checkReadException();
-    if(_configuration->buffered())
-    {
-        if(buf.i != buf.b.end())
-        {
-            _transceiver->finishRead(_readBuffer);
-
-            assert(_readBuffer.i > _readBufferPos);
-            size_t requested = buf.b.end() - buf.i;
-            size_t available = _readBuffer.i - _readBufferPos;
-            assert(available > 0);
-            if(available >= requested)
-            {
-                available = requested;
-            }
-            
-            memcpy(buf.i, _readBufferPos, available);
-            _readBufferPos += available;
-            buf.i += available;
-        }
-    }
-    else
-    {
-        _transceiver->finishRead(buf);
-    }
+    _transceiver->finishRead(buf);
 }
 #endif
 
@@ -235,11 +148,6 @@ Transceiver::checkSendSize(const IceInternal::Buffer& buf, size_t messageSizeMax
 Transceiver::Transceiver(const IceInternal::TransceiverPtr& transceiver) :
     _transceiver(transceiver),
     _configuration(Configuration::getInstance()),
-    _initialized(false),
-    _readBuffer(0)
+    _initialized(false)
 {
-    _readBuffer.b.resize(1024 * 8); // 8KB buffer
-    _readBufferPos = _readBuffer.b.begin();
-    _readBuffer.i = _readBuffer.b.begin();
 }
-
diff --git a/cpp/test/Ice/background/Transceiver.h b/cpp/test/Ice/background/Transceiver.h
index b6e06d40510..770272557b2 100644
--- a/cpp/test/Ice/background/Transceiver.h
+++ b/cpp/test/Ice/background/Transceiver.h
@@ -21,7 +21,7 @@ public:
 
     virtual void close();
     virtual bool write(IceInternal::Buffer&);
-    virtual bool read(IceInternal::Buffer&, bool&);
+    virtual bool read(IceInternal::Buffer&);
 #ifdef ICE_USE_IOCP
     virtual bool startWrite(IceInternal::Buffer&);
     virtual void finishWrite(IceInternal::Buffer&);
@@ -31,7 +31,7 @@ public:
     virtual std::string type() const;
     virtual std::string toString() const;
     virtual Ice::ConnectionInfoPtr getInfo() const;
-    virtual IceInternal::SocketOperation initialize(IceInternal::Buffer&, IceInternal::Buffer&, bool&);
+    virtual IceInternal::SocketOperation initialize(IceInternal::Buffer&, IceInternal::Buffer&);
     virtual void checkSendSize(const IceInternal::Buffer&, size_t);
 
 private:
@@ -44,9 +44,6 @@ private:
     const IceInternal::TransceiverPtr _transceiver;
     const ConfigurationPtr _configuration;
     bool _initialized;
-
-    IceInternal::Buffer _readBuffer;
-    IceInternal::Buffer::Container::const_iterator _readBufferPos;
 };
 
 #endif