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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 "core/workers/WorkerV8Isolate.h" | |
9 #include "modules/ModulesExport.h" | |
10 #include "wtf/OwnPtr.h" | |
11 #include "wtf/PassOwnPtr.h" | |
12 #include "wtf/ThreadingPrimitives.h" | |
13 #include <v8.h> | |
14 | |
15 namespace blink { | |
16 | |
17 class WebThreadSupportingGC; | |
18 | |
19 class MODULES_EXPORT CompositorWorkerManager final { | |
20 public: | |
21 static void initialize(); | |
22 static void shutdown(); | |
23 | |
24 static CompositorWorkerManager* instance(); | |
25 | |
26 // Returns the thread used for compositor workers. This creates a new thread if a | |
27 // thread doesn't already exist. | |
28 WebThreadSupportingGC& compositorWorkerThread(); | |
29 | |
30 // Attempts to initialize/shutdown a thread if necessary. Does nothing if th e thread | |
31 // is already initialized, or if the thread has more than one active workers at the | |
32 // time of shutdown. | |
33 void initializeBackingThread(); | |
34 void shutdownBackingThread(); | |
35 | |
36 PassOwnPtr<WorkerV8Isolate> createIsolate(); | |
37 void willDestroyIsolate(); | |
38 void destroyIsolate(); | |
39 void terminateIsolate(); | |
40 | |
41 private: | |
42 CompositorWorkerManager(); | |
43 ~CompositorWorkerManager(); | |
44 | |
45 Mutex m_mutex; | |
46 OwnPtr<WebThreadSupportingGC> m_thread; | |
47 int m_workerCount = 0; | |
48 OwnPtr<WorkerV8Isolate> m_isolate; | |
49 int m_isolateCount = 0; | |
kinuko
2015/05/31 15:18:24
Using manual counters is not great especially if w
sadrul
2015/06/01 05:24:11
Done.
| |
50 }; | |
51 | |
52 } // namespace blink | |
53 | |
54 #endif // CompositorWorkerManager_h | |
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