1 /* 2 * Copyright (C) 2010 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef FileThread_h 32 #define FileThread_h 33 34 #if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) 35 36 #include <wtf/MessageQueue.h> 37 #include <wtf/PassOwnPtr.h> 38 #include <wtf/PassRefPtr.h> 39 #include <wtf/Threading.h> 40 41 namespace WebCore { 42 43 class FileStream; 44 45 class FileThread : public ThreadSafeRefCounted<FileThread> { 46 public: create()47 static PassRefPtr<FileThread> create() 48 { 49 return adoptRef(new FileThread()); 50 } 51 52 ~FileThread(); 53 54 bool start(); 55 void stop(); 56 57 class Task { 58 WTF_MAKE_NONCOPYABLE(Task); 59 public: ~Task()60 virtual ~Task() { } 61 virtual void performTask() = 0; instance()62 void* instance() const { return m_instance; } 63 protected: Task(void * instance)64 Task(void* instance) : m_instance(instance) { } 65 void* m_instance; 66 }; 67 68 void postTask(PassOwnPtr<Task> task); 69 70 void unscheduleTasks(const void* instance); 71 72 private: 73 FileThread(); 74 75 static void* fileThreadStart(void*); 76 void* runLoop(); 77 78 ThreadIdentifier m_threadID; 79 RefPtr<FileThread> m_selfRef; 80 MessageQueue<Task> m_queue; 81 82 Mutex m_threadCreationMutex; 83 }; 84 85 } // namespace WebCore 86 87 #endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM) 88 89 #endif // FileThread_h 90