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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 #include "config.h" | |
| 6 #include "modules/compositorworker/CompositorWorkerManager.h" | |
| 7 | |
| 8 #include "bindings/core/v8/V8Binding.h" | |
| 9 #include "bindings/core/v8/V8GCController.h" | |
| 10 #include "bindings/core/v8/V8Initializer.h" | |
| 11 #include "bindings/core/v8/V8PerIsolateData.h" | |
| 12 #include "platform/ThreadSafeFunctional.h" | |
| 13 #include "platform/WebThreadSupportingGC.h" | |
| 14 #include "wtf/MainThread.h" | |
| 15 #include "wtf/ThreadingPrimitives.h" | |
| 16 | |
| 17 namespace blink { | |
| 18 | |
| 19 namespace { | |
| 20 | |
| 21 static CompositorWorkerManager* s_instance = nullptr; | |
| 22 | |
| 23 static Mutex& singletonMutex() | |
| 24 { | |
| 25 AtomicallyInitializedStaticReference(Mutex, mutex, new Mutex); | |
| 26 return mutex; | |
| 27 } | |
| 28 | |
| 29 static void destroyThread(WebThreadSupportingGC* thread) | |
| 30 { | |
| 31 delete thread; | |
| 32 } | |
| 33 | |
| 34 } // namespace | |
| 35 | |
| 36 void CompositorWorkerManager::initialize() | |
| 37 { | |
| 38 MutexLocker lock(singletonMutex()); | |
| 39 ASSERT(!s_instance); | |
| 40 s_instance = new CompositorWorkerManager(); | |
| 41 } | |
| 42 | |
| 43 void CompositorWorkerManager::shutdown() | |
| 44 { | |
| 45 MutexLocker lock(singletonMutex()); | |
| 46 ASSERT(s_instance); | |
| 47 delete s_instance; | |
| 48 s_instance = nullptr; | |
| 49 } | |
| 50 | |
| 51 CompositorWorkerManager* CompositorWorkerManager::instance() | |
| 52 { | |
| 53 MutexLocker lock(singletonMutex()); | |
| 54 ASSERT(s_instance); | |
| 55 return s_instance; | |
| 56 } | |
| 57 | |
| 58 CompositorWorkerManager::CompositorWorkerManager() | |
| 59 { | |
| 60 } | |
| 61 | |
| 62 CompositorWorkerManager::~CompositorWorkerManager() | |
| 63 { | |
| 64 } | |
| 65 | |
| 66 WebThreadSupportingGC& CompositorWorkerManager::compositorWorkerThread() | |
| 67 { | |
| 68 MutexLocker lock(m_mutex); | |
| 69 if (!m_thread) { | |
| 70 ASSERT(isMainThread()); | |
| 71 ASSERT(!m_workerCount); | |
| 72 m_thread = WebThreadSupportingGC::create("CompositorWorker Thread"); | |
| 73 } | |
| 74 return *m_thread.get(); | |
| 75 } | |
| 76 | |
| 77 void CompositorWorkerManager::initializeBackingThread() | |
| 78 { | |
| 79 ASSERT(m_thread->isCurrentThread()); | |
| 80 MutexLocker lock(m_mutex); | |
| 81 ++m_workerCount; | |
| 82 if (m_workerCount > 1) | |
| 83 return; | |
| 84 | |
| 85 m_thread->initialize(); | |
| 86 | |
| 87 // Initialize the isolate at the same time. | |
| 88 ASSERT(!m_isolate); | |
| 89 m_isolate = V8PerIsolateData::initialize(); | |
| 90 V8Initializer::initializeWorker(m_isolate); | |
| 91 | |
| 92 m_interruptor = adoptPtr(new V8IsolateInterruptor(m_isolate)); | |
| 93 ThreadState::current()->addInterruptor(m_interruptor.get()); | |
| 94 ThreadState::current()->registerTraceDOMWrappers(m_isolate, V8GCController::
traceDOMWrappers); | |
| 95 } | |
| 96 | |
| 97 void CompositorWorkerManager::shutdownBackingThread() | |
| 98 { | |
| 99 MutexLocker lock(m_mutex); | |
| 100 ASSERT(m_thread->isCurrentThread()); | |
| 101 ASSERT(m_workerCount > 0); | |
| 102 --m_workerCount; | |
| 103 if (m_workerCount == 0) { | |
| 104 m_thread->shutdown(); | |
| 105 Platform::current()->mainThread()->postTask(FROM_HERE, threadSafeBind(de
stroyThread, AllowCrossThreadAccess(m_thread.leakPtr()))); | |
| 106 m_thread = nullptr; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 v8::Isolate* CompositorWorkerManager::initializeIsolate() | |
| 111 { | |
| 112 MutexLocker lock(m_mutex); | |
| 113 ASSERT(m_thread->isCurrentThread()); | |
| 114 ASSERT(m_isolate); | |
| 115 // It is safe to use the existing isolate even if TerminateExecution() has b
een | |
| 116 // called on it, without calling CancelTerminateExecution(). | |
| 117 return m_isolate; | |
| 118 } | |
| 119 | |
| 120 void CompositorWorkerManager::willDestroyIsolate() | |
| 121 { | |
| 122 MutexLocker lock(m_mutex); | |
| 123 ASSERT(m_thread->isCurrentThread()); | |
| 124 if (m_workerCount == 1) { | |
| 125 V8PerIsolateData::willBeDestroyed(m_isolate); | |
| 126 ThreadState::current()->removeInterruptor(m_interruptor.get()); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 void CompositorWorkerManager::destroyIsolate() | |
| 131 { | |
| 132 MutexLocker lock(m_mutex); | |
| 133 if (!m_thread) { | |
| 134 ASSERT(m_workerCount == 0); | |
| 135 V8PerIsolateData::destroy(m_isolate); | |
| 136 m_isolate = nullptr; | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 void CompositorWorkerManager::terminateV8Execution() | |
| 141 { | |
| 142 MutexLocker lock(m_mutex); | |
| 143 ASSERT(isMainThread()); | |
| 144 if (m_workerCount > 1) | |
| 145 return; | |
| 146 | |
| 147 v8::V8::TerminateExecution(m_isolate); | |
| 148 } | |
| 149 | |
| 150 } // namespace blink | |
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Chromium Code Reviews
Issue 1166923003:
Revert of compositor-worker: Share a thread and an isolate for compositor workers. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk