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27 #ifndef WorkerThread_h
28 #define WorkerThread_h
30 #include "core/dom/ExecutionContextTask.h"
31 #include "core/frame/csp/ContentSecurityPolicy.h"
32 #include "core/workers/WorkerGlobalScope.h"
33 #include "platform/SharedTimer.h"
34 #include "platform/heap/glue/MessageLoopInterruptor.h"
35 #include "platform/heap/glue/PendingGCRunner.h"
36 #include "platform/weborigin/SecurityOrigin.h"
37 #include "public/platform/WebThread.h"
38 #include "wtf/Forward.h"
39 #include "wtf/MessageQueue.h"
40 #include "wtf/OwnPtr.h"
41 #include "wtf/PassRefPtr.h"
42 #include "wtf/RefCounted.h"
45 class WebWaitableEvent;
51 class WorkerGlobalScope;
52 class WorkerInspectorController;
53 class WorkerLoaderProxy;
54 class WorkerReportingProxy;
55 class WorkerSharedTimer;
56 class WorkerThreadShutdownFinishTask;
57 class WorkerThreadStartupData;
58 class WorkerThreadTask;
60 enum WorkerThreadStartMode { DontPauseWorkerGlobalScopeOnStart, PauseWorkerGlobalScopeOnStart };
63 class WorkerThread : public RefCounted<WorkerThread> {
65 virtual ~WorkerThread();
70 // Can be used to wait for this worker thread to shut down.
71 // (This is signalled on the main thread, so it's assumed to be waited on the worker context thread)
72 blink::WebWaitableEvent* shutdownEvent() { return m_shutdownEvent.get(); }
74 bool isCurrentThread() const;
75 WorkerLoaderProxy& workerLoaderProxy() const { return m_workerLoaderProxy; }
76 WorkerReportingProxy& workerReportingProxy() const { return m_workerReportingProxy; }
78 void postTask(PassOwnPtr<ExecutionContextTask>);
79 void postDebuggerTask(PassOwnPtr<ExecutionContextTask>);
81 enum WaitMode { WaitForMessage, DontWaitForMessage };
82 MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
84 // These methods should be called if the holder of the thread is
85 // going to call runDebuggerTask in a loop.
86 void willEnterNestedLoop();
87 void didLeaveNestedLoop();
89 WorkerGlobalScope* workerGlobalScope() const { return m_workerGlobalScope.get(); }
90 bool terminated() const { return m_terminated; }
92 // Number of active worker threads.
93 static unsigned workerThreadCount();
95 void interruptAndDispatchInspectorCommands();
96 void setWorkerInspectorController(WorkerInspectorController*);
99 WorkerThread(WorkerLoaderProxy&, WorkerReportingProxy&, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>);
101 // Factory method for creating a new worker context for the thread.
102 virtual PassRefPtrWillBeRawPtr<WorkerGlobalScope> createWorkerGlobalScope(PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>) = 0;
104 virtual void postInitialize() { }
107 friend class WorkerSharedTimer;
108 friend class WorkerThreadShutdownFinishTask;
113 void postDelayedTask(PassOwnPtr<ExecutionContextTask>, long long delayMs);
116 OwnPtr<WorkerSharedTimer> m_sharedTimer;
117 MessageQueue<WorkerThreadTask> m_debuggerMessageQueue;
118 OwnPtr<PendingGCRunner> m_pendingGCRunner;
119 OwnPtr<WebThread::TaskObserver> m_microtaskRunner;
120 OwnPtr<MessageLoopInterruptor> m_messageLoopInterruptor;
122 WorkerLoaderProxy& m_workerLoaderProxy;
123 WorkerReportingProxy& m_workerReportingProxy;
125 RefPtrWillBePersistent<WorkerInspectorController> m_workerInspectorController;
126 Mutex m_workerInspectorControllerMutex;
128 Mutex m_threadCreationMutex;
129 RefPtrWillBePersistent<WorkerGlobalScope> m_workerGlobalScope;
130 OwnPtrWillBePersistent<WorkerThreadStartupData> m_startupData;
132 // Used to signal thread shutdown.
133 OwnPtr<blink::WebWaitableEvent> m_shutdownEvent;
135 // FIXME: This has to be last because of crbug.com/401397 - the
136 // WorkerThread might get deleted before it had a chance to properly
137 // shut down. By deleting the WebThread first, we can guarantee that
138 // no pending tasks on the thread might want to access any of the other
139 // members during the WorkerThread's destruction.
140 OwnPtr<blink::WebThread> m_thread;
145 #endif // WorkerThread_h