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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_H_
#define CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_H_
#include "content/renderer/scheduler/single_thread_idle_task_runner.h"
#include "content/renderer/scheduler/task_queue_manager.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
namespace cc {
struct BeginFrameArgs;
}
namespace content {
class CONTENT_EXPORT RendererScheduler {
public:
virtual ~RendererScheduler();
static scoped_ptr<RendererScheduler> Create();
// Returns the default task runner.
virtual scoped_refptr<base::SingleThreadTaskRunner> DefaultTaskRunner() = 0;
// Returns the compositor task runner.
virtual scoped_refptr<base::SingleThreadTaskRunner>
CompositorTaskRunner() = 0;
// Returns the idle task runner. Tasks posted to this runner may be reordered
// relative to other task types and may be starved for an arbitrarily long
// time if no idle time is available.
virtual scoped_refptr<SingleThreadIdleTaskRunner> IdleTaskRunner() = 0;
// Called to notify about the start of a new frame. Must be called from the
// main thread.
virtual void WillBeginFrame(const cc::BeginFrameArgs& args) = 0;
// Called to notify that a previously begun frame was committed. Must be
// called from the main thread.
virtual void DidCommitFrameToCompositor() = 0;
// Tells the scheduler that the system received an input event. Called by the
// compositor (impl) thread.
virtual void DidReceiveInputEventOnCompositorThread(
blink::WebInputEvent::Type type) = 0;
// Tells the scheduler that the system is displaying an input animation (e.g.
// a fling). Called by the compositor (impl) thread.
virtual void DidAnimateForInputOnCompositorThread() = 0;
// Returns true if there is high priority work pending on the main thread
// and the caller should yield to let the scheduler service that work.
// Must be called from the main thread.
virtual bool ShouldYieldForHighPriorityWork() = 0;
// Shuts down the scheduler by dropping any remaining pending work in the work
// queues. After this call any work posted to the task runners will be
// silently dropped.
virtual void Shutdown() = 0;
protected:
RendererScheduler();
DISALLOW_COPY_AND_ASSIGN(RendererScheduler);
};
} // namespace content
#endif // CONTENT_RENDERER_SCHEDULER_RENDERER_SCHEDULER_H_
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