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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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