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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MESSAGE_LOOP_MESSAGE_PUMP_DEFAULT_H_
#define BASE_MESSAGE_LOOP_MESSAGE_PUMP_DEFAULT_H_
#include "base/base_export.h"
#include "base/message_loop/message_pump.h"
#include "base/synchronization/waitable_event.h"
#include "base/time/time.h"
#include "build/build_config.h"
namespace base {
class BASE_EXPORT MessagePumpDefault : public MessagePump {
public:
MessagePumpDefault();
MessagePumpDefault(const MessagePumpDefault&) = delete;
MessagePumpDefault& operator=(const MessagePumpDefault&) = delete;
~MessagePumpDefault() override;
// MessagePump methods:
void Run(Delegate* delegate) override;
void Quit() override;
void ScheduleWork() override;
void ScheduleDelayedWork(
const Delegate::NextWorkInfo& next_work_info) override;
// Visible for testing.
void RecordWaitTime(base::TimeDelta wait_time);
bool ShouldBusyLoop() const;
private:
// Returns whether the event was signaled.
bool BusyWaitOnEvent(base::TimeTicks before);
// This flag is set to false when Run should return.
bool keep_running_;
// Used to sleep until there is more work to do.
WaitableEvent event_;
base::TimeDelta last_wait_time_;
base::TimeDelta wait_time_exponential_moving_average_;
};
} // namespace base
#endif // BASE_MESSAGE_LOOP_MESSAGE_PUMP_DEFAULT_H_
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