/* * Copyright (C) 2010 Google 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: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT * OWNER OR 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 FileThread_h #define FileThread_h #include <functional> #include <wtf/MessageQueue.h> #include <wtf/PassRefPtr.h> #include <wtf/Threading.h> namespace WebCore { class FileStream; class FileThread : public ThreadSafeRefCounted<FileThread> { public: static PassRefPtr<FileThread> create() { return adoptRef(new FileThread()); } ~FileThread(); bool start(); void stop(); class Task { WTF_MAKE_NONCOPYABLE(Task); public: template<typename T, typename U, typename = typename std::enable_if<!std::is_base_of<Task, U>::value && std::is_convertible<U, std::function<void ()>>::value>::type> Task(T* instance, U method) : m_task(WTF::move(method)) , m_instance(instance) { } Task(Task&& other) : m_task(WTF::move(other.m_task)) , m_instance(other.m_instance) { } void performTask() { m_task(); } void* instance() const { return m_instance; } private: std::function<void ()> m_task; void* m_instance; }; void postTask(Task); void unscheduleTasks(const void* instance); private: FileThread(); static void fileThreadStart(void*); void runLoop(); ThreadIdentifier m_threadID; RefPtr<FileThread> m_selfRef; MessageQueue<Task> m_queue; Mutex m_threadCreationMutex; }; } // namespace WebCore #endif // FileThread_h