/* * Copyright (C) 2012 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef BlockingResponseMap_h #define BlockingResponseMap_h #include <wtf/HashMap.h> #include <wtf/OwnPtr.h> #include <wtf/PassOwnPtr.h> #include <wtf/ThreadingPrimitives.h> template<typename T> class BlockingResponseMap { public: PassOwnPtr<T> waitForResponse(uint64_t requestID) { while (true) { MutexLocker locker(m_mutex); if (OwnPtr<T> response = m_responses.take(requestID)) return response.release(); m_condition.wait(m_mutex); } return nullptr; } void didReceiveResponse(uint64_t requestID, PassOwnPtr<T> response) { MutexLocker locker(m_mutex); ASSERT(!m_responses.contains(requestID)); m_responses.set(requestID, response); m_condition.signal(); } private: Mutex m_mutex; ThreadCondition m_condition; HashMap<uint64_t, OwnPtr<T> > m_responses; }; #endif // BlockingResponseMap_h