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| 1 /* |
| 2 * Copyright (C) 2009 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 WorkerRunLoop_h |
| 32 #define WorkerRunLoop_h |
| 33 |
| 34 #include "core/dom/ExecutionContext.h" |
| 35 #include "core/dom/ExecutionContextTask.h" |
| 36 #include "public/platform/WebThread.h" |
| 37 #include "wtf/Functional.h" |
| 38 #include "wtf/MessageQueue.h" |
| 39 #include "wtf/OwnPtr.h" |
| 40 #include "wtf/PassOwnPtr.h" |
| 41 |
| 42 namespace blink { |
| 43 |
| 44 class WorkerGlobalScope; |
| 45 class WorkerSharedTimer; |
| 46 |
| 47 class WorkerRunLoop { |
| 48 public: |
| 49 WorkerRunLoop(); |
| 50 ~WorkerRunLoop(); |
| 51 |
| 52 void setWorkerGlobalScope(WorkerGlobalScope*); |
| 53 |
| 54 // Blocking call. Waits for tasks and timers, invokes the callbacks. |
| 55 void run(); |
| 56 |
| 57 enum WaitMode { WaitForMessage, DontWaitForMessage }; |
| 58 |
| 59 // Waits for a single debugger task and returns. |
| 60 MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage); |
| 61 |
| 62 void terminate(); |
| 63 bool terminated() const { return m_messageQueue.killed(); } |
| 64 |
| 65 WorkerGlobalScope* context() const { return m_context; } |
| 66 |
| 67 // Returns true if the loop is still alive, false if it has been termina
ted. |
| 68 bool postTask(PassOwnPtr<ExecutionContextTask>); |
| 69 |
| 70 void postTaskAndTerminate(PassOwnPtr<ExecutionContextTask>); |
| 71 |
| 72 // Returns true if the loop is still alive, false if it has been termina
ted. |
| 73 bool postDebuggerTask(PassOwnPtr<ExecutionContextTask>); |
| 74 |
| 75 private: |
| 76 friend class RunLoopSetup; |
| 77 MessageQueueWaitResult run(MessageQueue<blink::WebThread::Task>&, WaitMo
de); |
| 78 |
| 79 // Runs any clean up tasks that are currently in the queue and returns. |
| 80 // This should only be called when the context is closed or loop has bee
n terminated. |
| 81 void runCleanupTasks(); |
| 82 |
| 83 MessageQueue<blink::WebThread::Task> m_messageQueue; |
| 84 MessageQueue<blink::WebThread::Task> m_debuggerMessageQueue; |
| 85 OwnPtr<WorkerSharedTimer> m_sharedTimer; |
| 86 WorkerGlobalScope* m_context; |
| 87 int m_nestedCount; |
| 88 }; |
| 89 |
| 90 } // namespace blink |
| 91 |
| 92 #endif // WorkerRunLoop_h |
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