104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
/*
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* Copyright (c) 2011, 2012, 2013 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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* time.cpp
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* Handles interrupts whenever some time has passed and provides useful
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* time-related functions to the kernel.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <timespec.h>
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#include <sortix/clock.h>
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#include <sortix/kernel/clock.h>
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#include <sortix/kernel/copy.h>
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#include <sortix/kernel/interrupt.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/process.h>
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#include <sortix/kernel/scheduler.h>
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#include <sortix/kernel/syscall.h>
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#include <sortix/kernel/thread.h>
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#include <sortix/kernel/time.h>
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namespace Sortix {
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namespace Time {
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void CPUInit();
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Clock* realtime_clock;
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Clock* uptime_clock;
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Clock* GetClock(clockid_t clock)
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{
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switch ( clock )
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{
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case CLOCK_REALTIME: return realtime_clock;
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case CLOCK_BOOTTIME: return uptime_clock;
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case CLOCK_INIT: return uptime_clock;
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case CLOCK_MONOTONIC: return uptime_clock;
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case CLOCK_PROCESS_CPUTIME_ID: return &CurrentProcess()->execute_clock;
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case CLOCK_PROCESS_SYSTIME_ID: return &CurrentProcess()->system_clock;
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case CLOCK_CHILD_CPUTIME_ID: return &CurrentProcess()->child_execute_clock;
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case CLOCK_CHILD_SYSTIME_ID: return &CurrentProcess()->child_system_clock;
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case CLOCK_THREAD_CPUTIME_ID: return &CurrentThread()->execute_clock;
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case CLOCK_THREAD_SYSTIME_ID: return &CurrentThread()->system_clock;
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default: return errno = ENOTSUP, (Clock*) NULL;
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}
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}
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struct timespec Get(clockid_t clockid)
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{
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Clock* clock = GetClock(clockid);
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if ( clock )
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{
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struct timespec now;
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clock->Get(&now, NULL);
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return now;
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}
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return timespec_nul();
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}
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void OnTick(struct timespec tick_period, bool system_mode)
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{
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realtime_clock->Advance(tick_period);
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uptime_clock->Advance(tick_period);
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Thread* thread = CurrentThread();
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Process* process = thread->process;
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thread->execute_clock.Advance(tick_period);
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process->execute_clock.Advance(tick_period);
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process->child_execute_clock.Advance(tick_period);
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if ( system_mode )
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{
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thread->system_clock.Advance(tick_period);
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process->system_clock.Advance(tick_period);
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process->child_system_clock.Advance(tick_period);
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}
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}
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void Init()
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{
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if ( !(realtime_clock = new Clock()) )
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Panic("Unable to allocate realtime clock");
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if ( !(uptime_clock = new Clock()) )
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Panic("Unable to allocate uptime clock");
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CPUInit();
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}
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} // namespace Time
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} // namespace Sortix
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