75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* Copyright (c) 2013, 2016 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/kernel/timer.h
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* A virtual timer that triggers an action in a worker thread when triggered.
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*/
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#ifndef INCLUDE_SORTIX_KERNEL_TIMER_H
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#define INCLUDE_SORTIX_KERNEL_TIMER_H
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#include <sortix/timespec.h>
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#include <sortix/itimerspec.h>
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#include <sortix/kernel/kthread.h>
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namespace Sortix {
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class Clock;
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class Timer;
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static const int TIMER_ABSOLUTE = 1 << 0;
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static const int TIMER_ACTIVE = 1 << 1;
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static const int TIMER_FIRING = 1 << 2;
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static const int TIMER_FUNC_INTERRUPT_HANDLER = 1 << 3;
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static const int TIMER_FUNC_ADVANCE_THREAD = 1 << 4;
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class Timer
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{
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public:
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Timer();
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~Timer();
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public:
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struct itimerspec value;
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Clock* clock;
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Timer* prev_timer;
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Timer* next_timer;
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void (*callback)(Clock* clock, Timer* timer, void* user);
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void* user;
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size_t num_firings_scheduled;
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size_t num_overrun_events;
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int flags;
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private:
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void Fire();
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void GetInternal(struct itimerspec* current);
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public:
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void Attach(Clock* the_clock);
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void Detach();
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bool IsAttached() const { return clock; }
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void Cancel();
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Clock* GetClock() const { return clock; }
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void Get(struct itimerspec* current);
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void Set(struct itimerspec* value, struct itimerspec* ovalue, int flags,
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void (*callback)(Clock*, Timer*, void*), void* user);
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};
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} // namespace Sortix
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#endif
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