57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
/*
|
|
* \brief Time source that uses sleeping by the means of the kernel
|
|
* \author Norman Feske
|
|
* \author Martin Stein
|
|
* \date 2009-06-16
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2009-2015 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _TIME_SOURCE_H_
|
|
#define _TIME_SOURCE_H_
|
|
|
|
/* local includes */
|
|
#include <threaded_time_source.h>
|
|
|
|
namespace Timer { class Time_source; }
|
|
|
|
|
|
class Timer::Time_source : public Threaded_time_source
|
|
{
|
|
private:
|
|
|
|
Genode::Lock mutable _lock;
|
|
unsigned long _curr_time_us = 0;
|
|
unsigned long _next_timeout_us = max_timeout().value;
|
|
|
|
void _usleep(unsigned long us);
|
|
|
|
|
|
/**************************
|
|
** Threaded_time_source **
|
|
**************************/
|
|
|
|
void _wait_for_irq();
|
|
|
|
public:
|
|
|
|
Time_source(Genode::Entrypoint &ep) : Threaded_time_source(ep) {
|
|
start(); }
|
|
|
|
|
|
/*************************
|
|
** Genode::Time_source **
|
|
*************************/
|
|
|
|
Microseconds curr_time() const override;
|
|
Microseconds max_timeout() const override;
|
|
void schedule_timeout(Microseconds duration, Timeout_handler &handler) override;
|
|
};
|
|
|
|
#endif /* _TIME_SOURCE_H_ */
|