1/*
2 * Copyright 2006-2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
3 * Copyright 2003, Jeff Ward, jeff@r2d2.stcloudstate.edu. All rights reserved.
4 *
5 * Distributed under the terms of the MIT License.
6 */
7#ifndef _KERNEL_REAL_TIME_CLOCK_H
8#define _KERNEL_REAL_TIME_CLOCK_H
9
10
11#include <KernelExport.h>
12
13#include <time.h>
14
15
16struct kernel_args;
17
18
19#define RTC_EPOCH_BASE_YEAR	1970
20
21#ifdef __cplusplus
22extern "C" {
23#endif
24
25void set_real_time_clock_usecs(bigtime_t currentTime);
26
27status_t rtc_init(struct kernel_args *args);
28bigtime_t rtc_boot_time(void);
29	// Returns the time at which the system was booted in microseconds since Jan 1, 1970 UTC.
30
31// Both functions use the passed struct tm only partially
32// (no tm_wday, tm_yday, tm_isdst).
33uint32 rtc_tm_to_secs(const struct tm *t);
34void rtc_secs_to_tm(uint32 seconds, struct tm *t);
35
36uint32 get_timezone_offset(void);
37
38bigtime_t _user_system_time(void);
39status_t _user_set_real_time_clock(bigtime_t time);
40status_t _user_set_timezone(int32 timezoneOffset, const char *name,
41			size_t nameLength);
42status_t _user_get_timezone(int32 *_timezoneOffset, char* name,
43			size_t nameLength);
44status_t _user_set_real_time_clock_is_gmt(bool isGMT);
45status_t _user_get_real_time_clock_is_gmt(bool *_isGMT);
46
47#ifdef __cplusplus
48}
49#endif
50
51#endif /* _KERNEL_REAL_TIME_CLOCK_H */
52