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32 #include "core/dom/Microtask.h"
34 #include "bindings/v8/V8PerIsolateData.h"
35 #include "wtf/Vector.h"
40 void Microtask::performCheckpoint()
42 v8::Isolate* isolate = v8::Isolate::GetCurrent();
43 V8PerIsolateData* isolateData = V8PerIsolateData::from(isolate);
45 if (isolateData->recursionLevel() || isolateData->performingMicrotaskCheckpoint())
47 isolateData->setPerformingMicrotaskCheckpoint(true);
49 v8::HandleScope handleScope(isolate);
50 v8::Local<v8::Context> context = isolateData->ensureDomInJSContext();
51 v8::Context::Scope scope(context);
52 v8::V8::RunMicrotasks(isolate);
54 isolateData->setPerformingMicrotaskCheckpoint(false);
57 COMPILE_ASSERT(sizeof(void*) == sizeof(MicrotaskCallback), VoidPtrAndFunctionPtrAreSameSize);
59 static void microtaskFunctionCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
61 MicrotaskCallback callback =
62 reinterpret_cast<MicrotaskCallback>(reinterpret_cast<intptr_t>(
63 info.Data().As<v8::External>()->Value()));
67 void Microtask::enqueueMicrotask(MicrotaskCallback callback)
69 v8::Isolate* isolate = v8::Isolate::GetCurrent();
70 V8PerIsolateData* isolateData = V8PerIsolateData::from(isolate);
71 v8::HandleScope handleScope(isolate);
72 v8::Local<v8::Context> context = isolateData->ensureDomInJSContext();
73 v8::Context::Scope scope(context);
74 v8::Local<v8::External> handler =
75 v8::External::New(isolate,
76 reinterpret_cast<void*>(reinterpret_cast<intptr_t>(callback)));
77 v8::V8::EnqueueMicrotask(isolate, v8::Function::New(isolate, µtaskFunctionCallback, handler));
80 } // namespace WebCore