4 #include <linux/types.h>
7 #include <linux/seqlock.h>
10 #ifndef _STRUCT_TIMESPEC
11 #define _STRUCT_TIMESPEC
13 time_t tv_sec; /* seconds */
14 long tv_nsec; /* nanoseconds */
16 #endif /* _STRUCT_TIMESPEC */
19 time_t tv_sec; /* seconds */
20 suseconds_t tv_usec; /* microseconds */
24 int tz_minuteswest; /* minutes west of Greenwich */
25 int tz_dsttime; /* type of dst correction */
30 /* Parameters used to convert the timespec values */
31 #define MSEC_PER_SEC (1000L)
32 #define USEC_PER_SEC (1000000L)
33 #define NSEC_PER_SEC (1000000000L)
34 #define NSEC_PER_USEC (1000L)
36 static __inline__ int timespec_equal(struct timespec *a, struct timespec *b)
38 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
41 /* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
42 * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
43 * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
45 * [For the Julian calendar (which was used in Russia before 1917,
46 * Britain & colonies before 1752, anywhere else before 1582,
47 * and is still in use by some communities) leave out the
48 * -year/100+year/400 terms, and add 10.]
50 * This algorithm was first published by Gauss (I think).
52 * WARNING: this function will overflow on 2106-02-07 06:28:16 on
53 * machines were long is 32-bit! (However, as time_t is signed, we
54 * will already get problems at other places on 2038-01-19 03:14:08)
56 static inline unsigned long
57 mktime (unsigned int year, unsigned int mon,
58 unsigned int day, unsigned int hour,
59 unsigned int min, unsigned int sec)
61 if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */
62 mon += 12; /* Puts Feb last since it has leap day */
67 (unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
69 )*24 + hour /* now have hours */
70 )*60 + min /* now have minutes */
71 )*60 + sec; /* finally seconds */
74 extern struct timespec xtime;
75 extern struct timespec wall_to_monotonic;
76 extern seqlock_t xtime_lock;
78 static inline unsigned long get_seconds(void)
83 struct timespec current_kernel_time(void);
85 #define CURRENT_TIME (current_kernel_time())
86 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
88 extern void do_gettimeofday(struct timeval *tv);
89 extern int do_settimeofday(struct timespec *tv);
90 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
91 extern void clock_was_set(void); // call when ever the clock is set
92 extern int do_posix_clock_monotonic_gettime(struct timespec *tp);
93 extern long do_utimes(char __user * filename, struct timeval * times);
95 extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue);
96 extern int do_getitimer(int which, struct itimerval *value);
97 extern void getnstimeofday (struct timespec *tv);
99 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
102 set_normalized_timespec (struct timespec *ts, time_t sec, long nsec)
104 while (nsec > NSEC_PER_SEC) {
105 nsec -= NSEC_PER_SEC;
109 nsec += NSEC_PER_SEC;
116 #endif /* __KERNEL__ */
118 #define NFDBITS __NFDBITS
120 #define FD_SETSIZE __FD_SETSIZE
121 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
122 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
123 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
124 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
127 * Names of the interval timers, and structure
128 * defining a timer setting.
130 #define ITIMER_REAL 0
131 #define ITIMER_VIRTUAL 1
132 #define ITIMER_PROF 2
135 struct timespec it_interval; /* timer period */
136 struct timespec it_value; /* timer expiration */
140 struct timeval it_interval; /* timer interval */
141 struct timeval it_value; /* current value */
146 * The IDs of the various system clocks (for POSIX.1b interval timers).
148 #define CLOCK_REALTIME 0
149 #define CLOCK_MONOTONIC 1
150 #define CLOCK_PROCESS_CPUTIME_ID 2
151 #define CLOCK_THREAD_CPUTIME_ID 3
152 #define CLOCK_REALTIME_HR 4
153 #define CLOCK_MONOTONIC_HR 5
156 * The IDs of various hardware clocks
160 #define CLOCK_SGI_CYCLE 10
161 #define MAX_CLOCKS 16
162 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC | \
163 CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR)
164 #define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR)
167 * The various flags for setting POSIX.1b interval timers.
170 #define TIMER_ABSTIME 0x01