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35 #include "ScriptGCEvent.h"
36 #include "ScriptGCEventListener.h"
38 #include <wtf/CurrentTime.h>
42 ScriptGCEvent::GCEventListeners ScriptGCEvent::s_eventListeners;
43 double ScriptGCEvent::s_startTime = 0.0;
44 size_t ScriptGCEvent::s_usedHeapSize = 0;
46 void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
48 ASSERT(eventListener);
49 if (s_eventListeners.isEmpty()) {
50 v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
51 v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
53 s_eventListeners.append(eventListener);
56 void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
58 ASSERT(eventListener);
59 ASSERT(!s_eventListeners.isEmpty());
60 size_t i = s_eventListeners.find(eventListener);
61 ASSERT(i != notFound);
62 s_eventListeners.remove(i);
63 if (s_eventListeners.isEmpty()) {
64 v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
65 v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
69 void ScriptGCEvent::getHeapSize(size_t& usedHeapSize, size_t& totalHeapSize, size_t& heapSizeLimit)
71 v8::HeapStatistics heapStatistics;
72 v8::V8::GetHeapStatistics(&heapStatistics);
73 usedHeapSize = heapStatistics.used_heap_size();
74 totalHeapSize = heapStatistics.total_heap_size();
75 heapSizeLimit = heapStatistics.heap_size_limit();
78 size_t ScriptGCEvent::getUsedHeapSize()
80 v8::HeapStatistics heapStatistics;
81 v8::V8::GetHeapStatistics(&heapStatistics);
82 return heapStatistics.used_heap_size();
85 void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
87 s_startTime = WTF::currentTimeMS();
88 s_usedHeapSize = getUsedHeapSize();
91 void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
93 double endTime = WTF::currentTimeMS();
94 size_t collectedBytes = s_usedHeapSize - getUsedHeapSize();
95 GCEventListeners listeners(s_eventListeners);
96 for (GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
97 (*i)->didGC(s_startTime, endTime, collectedBytes);
100 } // namespace WebCore
102 #endif // ENABLE(INSPECTOR)