1#ifndef _LINUX_TIME_H
2#define _LINUX_TIME_H
3
4#include <linux/types.h>
5
6#ifdef __KERNEL__
7# include <linux/cache.h>
8# include <linux/seqlock.h>
9# include <linux/math64.h>
10#endif
11
12#ifndef _STRUCT_TIMESPEC
13#define _STRUCT_TIMESPEC
14struct timespec {
15 __kernel_time_t tv_sec;
16 long tv_nsec;
17};
18#endif
19
20struct timeval {
21 __kernel_time_t tv_sec;
22 __kernel_suseconds_t tv_usec;
23};
24
25struct timezone {
26 int tz_minuteswest;
27 int tz_dsttime;
28};
29
30#ifdef __KERNEL__
31
32extern struct timezone sys_tz;
33
34
35#define MSEC_PER_SEC 1000L
36#define USEC_PER_MSEC 1000L
37#define NSEC_PER_USEC 1000L
38#define NSEC_PER_MSEC 1000000L
39#define USEC_PER_SEC 1000000L
40#define NSEC_PER_SEC 1000000000L
41#define FSEC_PER_SEC 1000000000000000LL
42
43#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
44
45static inline int timespec_equal(const struct timespec *a,
46 const struct timespec *b)
47{
48 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
49}
50
51
52
53
54
55
56static inline int timespec_compare(const struct timespec *lhs, const struct timespec *rhs)
57{
58 if (lhs->tv_sec < rhs->tv_sec)
59 return -1;
60 if (lhs->tv_sec > rhs->tv_sec)
61 return 1;
62 return lhs->tv_nsec - rhs->tv_nsec;
63}
64
65static inline int timeval_compare(const struct timeval *lhs, const struct timeval *rhs)
66{
67 if (lhs->tv_sec < rhs->tv_sec)
68 return -1;
69 if (lhs->tv_sec > rhs->tv_sec)
70 return 1;
71 return lhs->tv_usec - rhs->tv_usec;
72}
73
74extern unsigned long mktime(const unsigned int year, const unsigned int mon,
75 const unsigned int day, const unsigned int hour,
76 const unsigned int min, const unsigned int sec);
77
78extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec);
79
80
81
82
83
84
85extern struct timespec timespec_add_safe(const struct timespec lhs,
86 const struct timespec rhs);
87
88
89static inline struct timespec timespec_add(struct timespec lhs,
90 struct timespec rhs)
91{
92 struct timespec ts_delta;
93 set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec,
94 lhs.tv_nsec + rhs.tv_nsec);
95 return ts_delta;
96}
97
98
99
100
101static inline struct timespec timespec_sub(struct timespec lhs,
102 struct timespec rhs)
103{
104 struct timespec ts_delta;
105 set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
106 lhs.tv_nsec - rhs.tv_nsec);
107 return ts_delta;
108}
109
110
111
112
113#define timespec_valid(ts) \
114 (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
115
116extern seqlock_t xtime_lock;
117
118extern void read_persistent_clock(struct timespec *ts);
119extern void read_boot_clock(struct timespec *ts);
120extern int update_persistent_clock(struct timespec now);
121extern int no_sync_cmos_clock __read_mostly;
122void timekeeping_init(void);
123extern int timekeeping_suspended;
124
125unsigned long get_seconds(void);
126struct timespec current_kernel_time(void);
127struct timespec __current_kernel_time(void);
128struct timespec __get_wall_to_monotonic(void);
129struct timespec get_monotonic_coarse(void);
130
131#define CURRENT_TIME (current_kernel_time())
132#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
133
134
135
136
137
138
139
140
141
142
143#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
144extern u32 arch_gettimeoffset(void);
145#else
146static inline u32 arch_gettimeoffset(void) { return 0; }
147#endif
148
149extern void do_gettimeofday(struct timeval *tv);
150extern int do_settimeofday(struct timespec *tv);
151extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
152#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
153extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
154struct itimerval;
155extern int do_setitimer(int which, struct itimerval *value,
156 struct itimerval *ovalue);
157extern unsigned int alarm_setitimer(unsigned int seconds);
158extern int do_getitimer(int which, struct itimerval *value);
159extern void getnstimeofday(struct timespec *tv);
160extern void getrawmonotonic(struct timespec *ts);
161extern void getnstime_raw_and_real(struct timespec *ts_raw,
162 struct timespec *ts_real);
163extern void getboottime(struct timespec *ts);
164extern void monotonic_to_bootbased(struct timespec *ts);
165
166extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
167extern int timekeeping_valid_for_hres(void);
168extern u64 timekeeping_max_deferment(void);
169extern void update_wall_time(void);
170extern void timekeeping_leap_insert(int leapsecond);
171
172struct tms;
173extern void do_sys_times(struct tms *);
174
175
176
177
178
179struct tm {
180
181
182
183
184 int tm_sec;
185
186 int tm_min;
187
188 int tm_hour;
189
190 int tm_mday;
191
192 int tm_mon;
193
194 long tm_year;
195
196 int tm_wday;
197
198 int tm_yday;
199};
200
201void time_to_tm(time_t totalsecs, int offset, struct tm *result);
202
203
204
205
206
207
208
209
210static inline s64 timespec_to_ns(const struct timespec *ts)
211{
212 return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
213}
214
215
216
217
218
219
220
221
222static inline s64 timeval_to_ns(const struct timeval *tv)
223{
224 return ((s64) tv->tv_sec * NSEC_PER_SEC) +
225 tv->tv_usec * NSEC_PER_USEC;
226}
227
228
229
230
231
232
233
234extern struct timespec ns_to_timespec(const s64 nsec);
235
236
237
238
239
240
241
242extern struct timeval ns_to_timeval(const s64 nsec);
243
244
245
246
247
248
249
250
251
252static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
253{
254 a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
255 a->tv_nsec = ns;
256}
257#endif
258
259#define NFDBITS __NFDBITS
260
261#define FD_SETSIZE __FD_SETSIZE
262#define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
263#define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
264#define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
265#define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
266
267
268
269
270
271#define ITIMER_REAL 0
272#define ITIMER_VIRTUAL 1
273#define ITIMER_PROF 2
274
275struct itimerspec {
276 struct timespec it_interval;
277 struct timespec it_value;
278};
279
280struct itimerval {
281 struct timeval it_interval;
282 struct timeval it_value;
283};
284
285
286
287
288#define CLOCK_REALTIME 0
289#define CLOCK_MONOTONIC 1
290#define CLOCK_PROCESS_CPUTIME_ID 2
291#define CLOCK_THREAD_CPUTIME_ID 3
292#define CLOCK_MONOTONIC_RAW 4
293#define CLOCK_REALTIME_COARSE 5
294#define CLOCK_MONOTONIC_COARSE 6
295
296
297
298
299#define CLOCK_SGI_CYCLE 10
300#define MAX_CLOCKS 16
301#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
302#define CLOCKS_MONO CLOCK_MONOTONIC
303
304
305
306
307#define TIMER_ABSTIME 0x01
308
309#endif
310