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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 COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_
#define COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_
#include <map>
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "components/scheduler/scheduler_export.h"
#include "third_party/WebKit/public/platform/WebThread.h"
namespace blink {
class WebTraceLocation;
}
namespace scheduler {
class SingleThreadIdleTaskRunner;
class SCHEDULER_EXPORT WebThreadBase : public blink::WebThread {
public:
~WebThreadBase() override;
// blink::WebThread implementation.
bool isCurrentThread() const override;
blink::PlatformThreadId threadId() const override = 0;
virtual void postIdleTask(const blink::WebTraceLocation& location,
IdleTask* idle_task);
virtual void postIdleTaskAfterWakeup(const blink::WebTraceLocation& location,
IdleTask* idle_task);
void addTaskObserver(TaskObserver* observer) override;
void removeTaskObserver(TaskObserver* observer) override;
// Returns the base::Bind-compatible task runner for posting tasks to this
// thread. Can be called from any thread.
virtual base::SingleThreadTaskRunner* GetTaskRunner() const = 0;
// Returns the base::Bind-compatible task runner for posting idle tasks to
// this thread. Can be called from any thread.
virtual scheduler::SingleThreadIdleTaskRunner* GetIdleTaskRunner() const = 0;
protected:
class TaskObserverAdapter;
WebThreadBase();
virtual void AddTaskObserverInternal(
base::MessageLoop::TaskObserver* observer);
virtual void RemoveTaskObserverInternal(
base::MessageLoop::TaskObserver* observer);
static void RunWebThreadIdleTask(
scoped_ptr<blink::WebThread::IdleTask> idle_task,
base::TimeTicks deadline);
private:
typedef std::map<TaskObserver*, TaskObserverAdapter*> TaskObserverMap;
TaskObserverMap task_observer_map_;
};
} // namespace scheduler
#endif // COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_
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