haiku/src/kernel/libroot/os/time.c

/* 
 * Copyright 2002-2004, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 */


#include <OS.h>

#include <string.h>
#include <syslog.h>

#include <libroot_private.h>
#include <real_time_data.h>
#include <syscalls.h>


static struct real_time_data sRealTimeDefaults = {
	0,
	100000,
	0,
	false,
	"",
	true
};
static struct real_time_data *sRealTimeData;


void
__init_time(void)
{
	area_id dataArea; 
	area_info info;

	dataArea = find_area("real time data userland");
	if (dataArea < 0 || get_area_info(dataArea, &info) < B_OK) {
		syslog(LOG_ERR, "error finding real time data area: %s\n", strerror(dataArea));
		sRealTimeData = &sRealTimeDefaults;
	} else
		sRealTimeData = (struct real_time_data *)info.address;

	__arch_init_time(sRealTimeData);
}


uint32
real_time_clock(void)
{
	return (sRealTimeData->boot_time + system_time()
		- (sRealTimeData->isGMT ? 0 : sRealTimeData->timezone_offset)) / 1000000;
}


bigtime_t
real_time_clock_usecs(void)
{
	return sRealTimeData->boot_time + system_time()
		- (sRealTimeData->isGMT ? 0 : sRealTimeData->timezone_offset);
}


void
set_real_time_clock(uint32 secs)
{
	_kern_set_real_time_clock(secs);
}


status_t
set_timezone(char *timezone)
{
	// ToDo: set_timezone()
	status_t err;
	struct tm *tm;
	time_t t;

	time(&t);
	tm = localtime(&t);

	if ((err = _kern_set_tzspecs(tm->tm_gmtoff, tm->tm_isdst))<B_OK)
		return err;

	return B_OK;
}


bigtime_t
set_alarm(bigtime_t when, uint32 flags)
{
	// ToDo: set_alarm()
	return B_ERROR;
}


void
_get_tzfilename(char* filename, size_t length)
{
	if (filename == NULL)
		return;

	strlcpy(filename, sRealTimeData->tzfilename, length);
}