sky/engine/core/dom/Microtask.cpp

/*
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#include "sky/engine/core/dom/Microtask.h"

#include "base/bind.h"
#include "base/trace_event/trace_event.h"
#include "sky/engine/public/platform/WebThread.h"
#include "sky/engine/wtf/OwnPtr.h"
#include "sky/engine/wtf/Vector.h"

namespace blink {

namespace {

class Task : public WebThread::Task {
public:
    explicit Task(const base::Closure& closure)
        : m_closure(closure)
    {
    }

    virtual void run() override
    {
        m_closure.Run();
    }

private:
    base::Closure m_closure;
};

}

// TODO(dart): Integrate this microtask queue with darts.
typedef Vector<OwnPtr<WebThread::Task> > MicrotaskQueue;
static MicrotaskQueue& microtaskQueue()
{
    DEFINE_STATIC_LOCAL(OwnPtr<MicrotaskQueue>, queue, (adoptPtr(new MicrotaskQueue())));
    return *queue;
}

void Microtask::performCheckpoint()
{
    MicrotaskQueue& queue = microtaskQueue();
    while(!queue.isEmpty()) {
        TRACE_EVENT0("sky", "Microtask::performCheckpoint");

        MicrotaskQueue local;
        swap(queue, local);
        for (const auto& task : local)
            task->run();
    }
}

void Microtask::enqueueMicrotask(PassOwnPtr<WebThread::Task> callback)
{
    microtaskQueue().append(callback);
}

void Microtask::enqueueMicrotask(const base::Closure& callback)
{
    enqueueMicrotask(adoptPtr(new Task(callback)));
}

} // namespace blink