diff options
Diffstat (limited to 'qpid/cpp/src/qpid/sys/windows/PollableCondition.cpp')
-rw-r--r-- | qpid/cpp/src/qpid/sys/windows/PollableCondition.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/windows/PollableCondition.cpp b/qpid/cpp/src/qpid/sys/windows/PollableCondition.cpp new file mode 100644 index 0000000000..6a1d9045b4 --- /dev/null +++ b/qpid/cpp/src/qpid/sys/windows/PollableCondition.cpp @@ -0,0 +1,114 @@ +#ifndef QPID_SYS_WINDOWS_POLLABLECONDITION_CPP +#define QPID_SYS_WINDOWS_POLLABLECONDITION_CPP + +/* + * + * 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 "qpid/sys/PollableCondition.h" +#include "qpid/sys/IOHandle.h" +#include "qpid/sys/windows/AsynchIoResult.h" +#include "qpid/sys/windows/IoHandlePrivate.h" + +#include <boost/bind.hpp> +#include <windows.h> + +namespace qpid { +namespace sys { + +// PollableConditionPrivate will reuse the IocpPoller's ability to queue +// a completion to the IOCP and have it dispatched to the completer callback +// noted in the IOHandlePrivate when the request is queued. The +// AsynchCallbackRequest object is not really used - we already have the +// desired callback for the user of PollableCondition. +class PollableConditionPrivate : private IOHandle { + friend class PollableCondition; + +private: + PollableConditionPrivate(const sys::PollableCondition::Callback& cb, + sys::PollableCondition& parent, + const boost::shared_ptr<sys::Poller>& poller); + ~PollableConditionPrivate(); + + void poke(); + void dispatch(windows::AsynchIoResult *result); + +private: + PollableCondition::Callback cb; + PollableCondition& parent; + boost::shared_ptr<sys::Poller> poller; + LONG isSet; +}; + +PollableConditionPrivate::PollableConditionPrivate(const sys::PollableCondition::Callback& cb, + sys::PollableCondition& parent, + const boost::shared_ptr<sys::Poller>& poller) + : IOHandle(new sys::IOHandlePrivate(INVALID_SOCKET, + boost::bind(&PollableConditionPrivate::dispatch, this, _1))), + cb(cb), parent(parent), poller(poller), isSet(0) +{ +} + +PollableConditionPrivate::~PollableConditionPrivate() +{ +} + +void PollableConditionPrivate::poke() +{ + // monitorHandle will queue a completion for the IOCP; when it's handled, a + // poller thread will call back to dispatch() below. + PollerHandle ph(*this); + poller->monitorHandle(ph, Poller::INPUT); +} + +void PollableConditionPrivate::dispatch(windows::AsynchIoResult *result) +{ + delete result; // Poller::monitorHandle() allocates this + cb(parent); + if (isSet) + poke(); +} + + /* PollableCondition */ + +PollableCondition::PollableCondition(const Callback& cb, + const boost::shared_ptr<sys::Poller>& poller) + : impl(new PollableConditionPrivate(cb, *this, poller)) +{ +} + +PollableCondition::~PollableCondition() +{ + delete impl; +} + +void PollableCondition::set() { + // Add one to the set count and poke it to provoke a callback + ::InterlockedIncrement(&impl->isSet); + impl->poke(); +} + +void PollableCondition::clear() { + ::InterlockedExchange(&impl->isSet, 0); +} + +}} // namespace qpid::sys + +#endif /*!QPID_SYS_WINDOWS_POLLABLECONDITION_CPP*/ |