Source/core/dom/Microtask.cpp

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#include "config.h"
#include "core/dom/Microtask.h"

#include "bindings/v8/V8PerIsolateData.h"
#include "wtf/Vector.h"

namespace WebCore {

typedef Vector<MicrotaskCallback> MicrotaskQueue;

static MicrotaskQueue& microtaskQueue()
{
    DEFINE_STATIC_LOCAL(MicrotaskQueue, microtaskQueue, ());
    return microtaskQueue;
}

void Microtask::performCheckpoint()
{
    V8PerIsolateData* isolateData = V8PerIsolateData::current();
    ASSERT(isolateData);
    if (isolateData->performingMicrotaskCheckpoint())
        return;
    isolateData->setPerformingMicrotaskCheckpoint(true);

    while (!microtaskQueue().isEmpty()) {
        Vector<MicrotaskCallback> microtasks;
        microtasks.swap(microtaskQueue());
        for (size_t i = 0; i < microtasks.size(); ++i) {
            microtasks[i]();
        }
    }

    isolateData->setPerformingMicrotaskCheckpoint(false);
}

void Microtask::enqueueMicrotask(MicrotaskCallback callback)
{
    microtaskQueue().append(callback);
}

} // namespace WebCore