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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 Mutex& singletonMutex() | |
| 24 { | |
| 25 AtomicallyInitializedStaticReference(Mutex, mutex, new Mutex); | |
| 26 return mutex; | |
| 27 } | |
| 28 | |
| 29 void destroyThread(WebThread* 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 // TODO(sadrul): Instead of creating a new thread, retrieve the thread f
rom | |
| 73 // Platform using a more specialized function | |
| 74 // (e.g. Platform::compositorWorkerThread()). | |
| 75 m_platformThread = adoptPtr(Platform::current()->createThread("Composito
rWorker Thread")); | |
| 76 m_thread = WebThreadSupportingGC::createForThread(m_platformThread.get()
); | |
| 77 } | |
| 78 return *m_thread.get(); | |
| 79 } | |
| 80 | |
| 81 void CompositorWorkerManager::initializeBackingThread() | |
| 82 { | |
| 83 ASSERT(m_thread->isCurrentThread()); | |
| 84 MutexLocker lock(m_mutex); | |
| 85 ++m_workerCount; | |
| 86 if (m_workerCount > 1) | |
| 87 return; | |
| 88 | |
| 89 m_thread->initialize(); | |
| 90 | |
| 91 // Initialize the isolate at the same time. | |
| 92 ASSERT(!m_isolate); | |
| 93 m_isolate = V8PerIsolateData::initialize(); | |
| 94 V8Initializer::initializeWorker(m_isolate); | |
| 95 | |
| 96 OwnPtr<V8IsolateInterruptor> interruptor = adoptPtr(new V8IsolateInterruptor
(m_isolate)); | |
| 97 ThreadState::current()->addInterruptor(interruptor.release()); | |
| 98 ThreadState::current()->registerTraceDOMWrappers(m_isolate, V8GCController::
traceDOMWrappers); | |
| 99 } | |
| 100 | |
| 101 void CompositorWorkerManager::shutdownBackingThread() | |
| 102 { | |
| 103 MutexLocker lock(m_mutex); | |
| 104 ASSERT(m_thread->isCurrentThread()); | |
| 105 ASSERT(m_workerCount > 0); | |
| 106 --m_workerCount; | |
| 107 if (m_workerCount == 0) { | |
| 108 m_thread->shutdown(); | |
| 109 m_thread = nullptr; | |
| 110 Platform::current()->mainThread()->taskRunner()->postTask(BLINK_FROM_HER
E, threadSafeBind(destroyThread, AllowCrossThreadAccess(m_platformThread.leakPtr
()))); | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 v8::Isolate* CompositorWorkerManager::initializeIsolate() | |
| 115 { | |
| 116 MutexLocker lock(m_mutex); | |
| 117 ASSERT(m_thread->isCurrentThread()); | |
| 118 ASSERT(m_isolate); | |
| 119 // It is safe to use the existing isolate even if TerminateExecution() has b
een | |
| 120 // called on it, without calling CancelTerminateExecution(). | |
| 121 return m_isolate; | |
| 122 } | |
| 123 | |
| 124 void CompositorWorkerManager::willDestroyIsolate() | |
| 125 { | |
| 126 MutexLocker lock(m_mutex); | |
| 127 ASSERT(m_thread->isCurrentThread()); | |
| 128 if (m_workerCount == 1) | |
| 129 V8PerIsolateData::willBeDestroyed(m_isolate); | |
| 130 } | |
| 131 | |
| 132 void CompositorWorkerManager::destroyIsolate() | |
| 133 { | |
| 134 MutexLocker lock(m_mutex); | |
| 135 if (!m_thread) { | |
| 136 ASSERT(m_workerCount == 0); | |
| 137 V8PerIsolateData::destroy(m_isolate); | |
| 138 m_isolate = nullptr; | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 void CompositorWorkerManager::terminateV8Execution() | |
| 143 { | |
| 144 MutexLocker lock(m_mutex); | |
| 145 ASSERT(isMainThread()); | |
| 146 if (m_workerCount > 1) | |
| 147 return; | |
| 148 | |
| 149 v8::V8::TerminateExecution(m_isolate); | |
| 150 } | |
| 151 | |
| 152 } // namespace blink | |
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Chromium Code Reviews
Issue 1449953002:
compositor-worker: Refactor CompositorWorkerManager (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master