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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CompositorWorkerManager_h |
| 6 #define CompositorWorkerManager_h |
| 7 |
| 8 #include "modules/ModulesExport.h" |
| 9 #include "wtf/OwnPtr.h" |
| 10 #include "wtf/PassOwnPtr.h" |
| 11 #include "wtf/ThreadingPrimitives.h" |
| 12 #include <v8.h> |
| 13 |
| 14 namespace blink { |
| 15 |
| 16 class V8IsolateInterruptor; |
| 17 class WebThread; |
| 18 class WebThreadSupportingGC; |
| 19 |
| 20 class MODULES_EXPORT CompositorWorkerManager final { |
| 21 USING_FAST_MALLOC(CompositorWorkerManager); |
| 22 public: |
| 23 static void initialize(); |
| 24 static void shutdown(); |
| 25 |
| 26 static CompositorWorkerManager* instance(); |
| 27 |
| 28 // Returns the thread used for compositor workers. This creates a new thread
if a |
| 29 // thread doesn't already exist. |
| 30 WebThreadSupportingGC& compositorWorkerThread(); |
| 31 |
| 32 // Attempts to initialize/shutdown a thread if necessary. Does nothing if th
e thread |
| 33 // is already initialized, or if the thread has more than one active workers
at the |
| 34 // time of shutdown. |
| 35 void initializeBackingThread(); |
| 36 void shutdownBackingThread(); |
| 37 |
| 38 v8::Isolate* initializeIsolate(); |
| 39 void willDestroyIsolate(); |
| 40 void destroyIsolate(); |
| 41 void terminateV8Execution(); |
| 42 |
| 43 private: |
| 44 friend class CompositorWorkerManagerTest; |
| 45 |
| 46 CompositorWorkerManager(); |
| 47 ~CompositorWorkerManager(); |
| 48 |
| 49 Mutex m_mutex; |
| 50 OwnPtr<WebThreadSupportingGC> m_thread; |
| 51 OwnPtr<WebThread> m_platformThread; |
| 52 int m_workerCount = 0; |
| 53 v8::Isolate* m_isolate = nullptr; |
| 54 }; |
| 55 |
| 56 } // namespace blink |
| 57 |
| 58 #endif // CompositorWorkerManager_h |
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