59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
/*
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* \brief Time source that uses sleeping by the means of the kernel
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* \author Norman Feske
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* \author Martin Stein
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* \date 2009-06-16
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*/
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/*
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* Copyright (C) 2009-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _TIME_SOURCE_H_
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#define _TIME_SOURCE_H_
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/* local includes */
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#include <threaded_time_source.h>
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namespace Timer { class Time_source; }
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class Timer::Time_source : public Threaded_time_source
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{
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private:
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Genode::Env &_env;
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Genode::Lock mutable _lock { };
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unsigned long _curr_time_us = 0;
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unsigned long _next_timeout_us = max_timeout().value;
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void _usleep(unsigned long us);
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/**************************
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** Threaded_time_source **
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**************************/
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void _wait_for_irq() override;
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public:
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Time_source(Genode::Env &env)
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: Threaded_time_source(env), _env(env) { start(); }
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/*************************
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** Genode::Time_source **
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*************************/
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Duration curr_time() override;
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Microseconds max_timeout() const override;
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void schedule_timeout(Microseconds duration, Timeout_handler &handler) override;
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};
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#endif /* _TIME_SOURCE_H_ */
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