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1 /* | |
2 * Copyright (C) 2008 Apple 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 | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 * | |
25 */ | |
26 | |
27 #ifndef WorkerThread_h | |
28 #define WorkerThread_h | |
29 | |
30 #include "core/CoreExport.h" | |
31 #include "core/dom/ExecutionContextTask.h" | |
32 #include "core/frame/csp/ContentSecurityPolicy.h" | |
33 #include "core/workers/WorkerGlobalScope.h" | |
34 #include "core/workers/WorkerLoaderProxy.h" | |
35 #include "platform/WebThreadSupportingGC.h" | |
36 #include "platform/weborigin/SecurityOrigin.h" | |
37 #include "wtf/Forward.h" | |
38 #include "wtf/MessageQueue.h" | |
39 #include "wtf/OwnPtr.h" | |
40 #include "wtf/PassRefPtr.h" | |
41 #include "wtf/RefCounted.h" | |
42 #include <v8.h> | |
43 | |
44 namespace blink { | |
45 | |
46 class WebWaitableEvent; | |
47 class WorkerGlobalScope; | |
48 class WorkerInspectorController; | |
49 class WorkerReportingProxy; | |
50 class WorkerSharedTimer; | |
51 class WorkerThreadShutdownFinishTask; | |
52 class WorkerThreadStartupData; | |
53 class WorkerThreadTask; | |
54 | |
55 enum WorkerThreadStartMode { | |
56 DontPauseWorkerGlobalScopeOnStart, | |
57 PauseWorkerGlobalScopeOnStart | |
58 }; | |
59 | |
60 // TODO(sadrul): Rename to WorkerScript. | |
61 class CORE_EXPORT WorkerThread : public RefCounted<WorkerThread> { | |
62 public: | |
63 virtual ~WorkerThread(); | |
64 | |
65 virtual void start(); | |
66 virtual void stop(); | |
67 | |
68 // Returns the thread this worker runs on. Some implementations can create | |
69 // a new thread on the first call (e.g. shared, dedicated workers), whereas | |
70 // some implementations can use an existing thread that is already being | |
71 // used by other workers (e.g. compositor workers). | |
72 virtual WebThreadSupportingGC& backingThread() = 0; | |
73 | |
74 virtual void didStartRunLoop(); | |
75 virtual void didStopRunLoop(); | |
76 | |
77 v8::Isolate* isolate() const { return m_isolate; } | |
78 | |
79 // Can be used to wait for this worker thread to shut down. | |
80 // (This is signalled on the main thread, so it's assumed to be waited on th
e worker context thread) | |
81 WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); } | |
82 | |
83 WebWaitableEvent* terminationEvent() { return m_terminationEvent.get(); } | |
84 void terminateAndWait(); | |
85 static void terminateAndWaitForAllWorkers(); | |
86 | |
87 bool isCurrentThread(); | |
88 WorkerLoaderProxy* workerLoaderProxy() const | |
89 { | |
90 RELEASE_ASSERT(m_workerLoaderProxy); | |
91 return m_workerLoaderProxy.get(); | |
92 } | |
93 | |
94 WorkerReportingProxy& workerReportingProxy() const { return m_workerReportin
gProxy; } | |
95 | |
96 void postTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTask>); | |
97 void postDebuggerTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTa
sk>); | |
98 | |
99 enum WaitMode { WaitForMessage, DontWaitForMessage }; | |
100 MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage); | |
101 | |
102 // These methods should be called if the holder of the thread is | |
103 // going to call runDebuggerTask in a loop. | |
104 void willEnterNestedLoop(); | |
105 void didLeaveNestedLoop(); | |
106 | |
107 WorkerGlobalScope* workerGlobalScope() const { return m_workerGlobalScope.ge
t(); } | |
108 bool terminated(); | |
109 | |
110 // Number of active worker threads. | |
111 static unsigned workerThreadCount(); | |
112 | |
113 PlatformThreadId platformThreadId(); | |
114 | |
115 void interruptAndDispatchInspectorCommands(); | |
116 void setWorkerInspectorController(WorkerInspectorController*); | |
117 | |
118 protected: | |
119 WorkerThread(PassRefPtr<WorkerLoaderProxy>, WorkerReportingProxy&, PassOwnPt
r<WorkerThreadStartupData>); | |
120 | |
121 // Factory method for creating a new worker context for the thread. | |
122 virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(Pa
ssOwnPtr<WorkerThreadStartupData>) = 0; | |
123 | |
124 virtual void postInitialize() { } | |
125 | |
126 virtual v8::Isolate* initializeIsolate(); | |
127 virtual void willDestroyIsolate(); | |
128 virtual void destroyIsolate(); | |
129 virtual void terminateV8Execution(); | |
130 | |
131 private: | |
132 friend class WorkerSharedTimer; | |
133 friend class WorkerThreadShutdownFinishTask; | |
134 | |
135 void stopInShutdownSequence(); | |
136 void stopInternal(); | |
137 | |
138 void initialize(); | |
139 void cleanup(); | |
140 void idleHandler(); | |
141 void postDelayedTask(PassOwnPtr<ExecutionContextTask>, long long delayMs); | |
142 void postDelayedTask(const WebTraceLocation&, PassOwnPtr<ExecutionContextTas
k>, long long delayMs); | |
143 | |
144 bool m_started; | |
145 bool m_terminated; | |
146 MessageQueue<WorkerThreadTask> m_debuggerMessageQueue; | |
147 OwnPtr<WebThread::TaskObserver> m_microtaskRunner; | |
148 | |
149 RefPtr<WorkerLoaderProxy> m_workerLoaderProxy; | |
150 WorkerReportingProxy& m_workerReportingProxy; | |
151 | |
152 RefPtrWillBePersistent<WorkerInspectorController> m_workerInspectorControlle
r; | |
153 Mutex m_workerInspectorControllerMutex; | |
154 | |
155 Mutex m_threadCreationMutex; | |
156 RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope; | |
157 OwnPtr<WorkerThreadStartupData> m_startupData; | |
158 | |
159 v8::Isolate* m_isolate; | |
160 OwnPtr<V8IsolateInterruptor> m_interruptor; | |
161 | |
162 // Used to signal thread shutdown. | |
163 OwnPtr<WebWaitableEvent> m_shutdownEvent; | |
164 | |
165 // Used to signal thread termination. | |
166 OwnPtr<WebWaitableEvent> m_terminationEvent; | |
167 }; | |
168 | |
169 } // namespace blink | |
170 | |
171 #endif // WorkerThread_h | |
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