#include "config.h"
#if ENABLE(INSPECTOR)
#include "ScriptGCEvent.h"
#include "ScriptGCEventListener.h"
#include <wtf/CurrentTime.h>
namespace WebCore {
ScriptGCEvent::GCEventListeners ScriptGCEvent::s_eventListeners;
double ScriptGCEvent::s_startTime = 0.0;
size_t ScriptGCEvent::s_usedHeapSize = 0;
void ScriptGCEvent::addEventListener(ScriptGCEventListener* eventListener)
{
ASSERT(eventListener);
if (s_eventListeners.isEmpty()) {
v8::V8::AddGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
v8::V8::AddGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
}
s_eventListeners.append(eventListener);
}
void ScriptGCEvent::removeEventListener(ScriptGCEventListener* eventListener)
{
ASSERT(eventListener);
ASSERT(!s_eventListeners.isEmpty());
size_t i = s_eventListeners.find(eventListener);
ASSERT(i != notFound);
s_eventListeners.remove(i);
if (s_eventListeners.isEmpty()) {
v8::V8::RemoveGCPrologueCallback(ScriptGCEvent::gcPrologueCallback);
v8::V8::RemoveGCEpilogueCallback(ScriptGCEvent::gcEpilogueCallback);
}
}
void ScriptGCEvent::getHeapSize(size_t& usedHeapSize, size_t& totalHeapSize, size_t& heapSizeLimit)
{
v8::HeapStatistics heapStatistics;
v8::V8::GetHeapStatistics(&heapStatistics);
usedHeapSize = heapStatistics.used_heap_size();
totalHeapSize = heapStatistics.total_heap_size();
heapSizeLimit = heapStatistics.heap_size_limit();
}
size_t ScriptGCEvent::getUsedHeapSize()
{
v8::HeapStatistics heapStatistics;
v8::V8::GetHeapStatistics(&heapStatistics);
return heapStatistics.used_heap_size();
}
void ScriptGCEvent::gcPrologueCallback(v8::GCType type, v8::GCCallbackFlags flags)
{
s_startTime = WTF::currentTimeMS();
s_usedHeapSize = getUsedHeapSize();
}
void ScriptGCEvent::gcEpilogueCallback(v8::GCType type, v8::GCCallbackFlags flags)
{
double endTime = WTF::currentTimeMS();
size_t collectedBytes = s_usedHeapSize - getUsedHeapSize();
GCEventListeners listeners(s_eventListeners);
for (GCEventListeners::iterator i = listeners.begin(); i != listeners.end(); ++i)
(*i)->didGC(s_startTime, endTime, collectedBytes);
}
}
#endif // ENABLE(INSPECTOR)