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86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/**
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* Native CPU rtc.h implementation
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*
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* The native rtc implementation uses POSIX system calls to simulate a
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* real-time clock.
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*
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* Setting the clock will be implemented using a delta variable.
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*
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* Copyright (C) 2013 Ludwig Ortmann
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*
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* This file is subject to the terms and conditions of the GNU Lesser General Public
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* License. See the file LICENSE in the top level directory for more details.
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*
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* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
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*
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* @ingroup native_cpu
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* @ingroup rtc
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* @file
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*/
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#include <time.h>
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#include <stdlib.h>
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#include <err.h>
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#include "debug.h"
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#include "rtc.h"
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#include "cpu.h"
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#include "native_internal.h"
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static int native_rtc_enabled;
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void rtc_init(void)
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{
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native_rtc_enabled = 0;
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printf("native rtc initialized\n");
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}
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void rtc_enable(void)
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{
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DEBUG("rtc_enable\n");
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native_rtc_enabled = 1;
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}
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void rtc_disable(void)
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{
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DEBUG("rtc_disable()\n");
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native_rtc_enabled = 0;
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}
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void rtc_set_localtime(struct tm *localt)
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{
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DEBUG("rtc_set_localtime()\n");
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(void)localt; /* not implemented atm */
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printf("setting time not supported.");
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}
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void rtc_get_localtime(struct tm *localt)
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{
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time_t t;
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if (native_rtc_enabled == 1) {
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_native_syscall_enter();
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t = time(NULL);
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if (localtime_r(&t, localt) == NULL) {
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err(EXIT_FAILURE, "rtc_get_localtime: localtime_r");
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}
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_native_syscall_leave();
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}
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}
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time_t rtc_time(struct timeval *time)
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{
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if (native_rtc_enabled == 1) {
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_native_syscall_enter();
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if (gettimeofday(time, NULL) == -1) {
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err(EXIT_FAILURE, "rtc_time: gettimeofday");
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}
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_native_syscall_leave();
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}
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return time->tv_sec;
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}
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