| /* |
| * |
| * 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 |