4d3d4ecca0
With this, we get rid of platform specific timer interfaces. The new Timer class does the same as the old Clock class and has a generic interface. The old Timer class was merely used by the old Clock class. Also, we get rid of having only one timer instance which we tell with each method call for which CPU it shall be done. Instead now each Cpu object has its own Timer member that knows the CPU it works for. Also, rename all "tics" to "ticks". Fixes #2347
105 lines
1.9 KiB
C++
105 lines
1.9 KiB
C++
/*
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* \brief A timer manages a continuous time and timeouts on it
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* \author Martin Stein
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* \date 2016-03-23
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*/
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/*
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* Copyright (C) 2016-2017 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 _CORE__KERNEL__TIMER_H_
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#define _CORE__KERNEL__TIMER_H_
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/* base-hw includes */
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#include <kernel/types.h>
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/* Genode includes */
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#include <util/list.h>
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/* Core includes */
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#include <timer_driver.h>
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namespace Kernel
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{
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class Timeout;
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class Timer;
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}
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/**
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* A timeout causes a kernel pass and the call of a timeout specific handle
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*/
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class Kernel::Timeout : public Genode::List<Timeout>::Element
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{
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friend class Timer;
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private:
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bool _listed = false;
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time_t _start;
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time_t _end;
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bool _end_period;
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public:
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/**
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* Callback handle
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*/
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virtual void timeout_triggered() { }
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virtual ~Timeout() { }
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};
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/**
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* A timer manages a continuous time and timeouts on it
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*/
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class Kernel::Timer
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{
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private:
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using Driver = Timer_driver;
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unsigned const _cpu_id;
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Driver _driver;
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time_t _time = 0;
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bool _time_period = false;
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Genode::List<Timeout> _timeout_list[2];
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time_t _last_timeout_duration = 0;
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bool _time_overflow(time_t const duration) const;
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void _start_one_shot(time_t const ticks);
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time_t _ticks_to_us(time_t const ticks) const;
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time_t _value();
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time_t _max_value() const;
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public:
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Timer(unsigned cpu_id);
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void schedule_timeout();
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time_t update_time();
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void process_timeouts();
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void set_timeout(Timeout * const timeout, time_t const duration);
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time_t us_to_ticks(time_t const us) const;
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time_t timeout_age_us(Timeout const * const timeout) const;
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time_t timeout_max_us() const;
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unsigned interrupt_id() const;
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static void init_cpu_local();
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};
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#endif /* _CORE__KERNEL__TIMER_H_ */
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