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104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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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/time.h>
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#ifdef PLATFORM_SERIAL
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#include "serialterminal.h"
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#endif
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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_BOOT: 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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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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Process* process = CurrentProcess();
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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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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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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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