Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _LINUX_TIME_H |
2 | #define _LINUX_TIME_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | #ifdef __KERNEL__ | |
7 | #include <linux/seqlock.h> | |
8 | #endif | |
9 | ||
10 | #ifndef _STRUCT_TIMESPEC | |
11 | #define _STRUCT_TIMESPEC | |
12 | struct timespec { | |
13 | time_t tv_sec; /* seconds */ | |
14 | long tv_nsec; /* nanoseconds */ | |
15 | }; | |
16 | #endif /* _STRUCT_TIMESPEC */ | |
17 | ||
18 | struct timeval { | |
19 | time_t tv_sec; /* seconds */ | |
20 | suseconds_t tv_usec; /* microseconds */ | |
21 | }; | |
22 | ||
23 | struct timezone { | |
24 | int tz_minuteswest; /* minutes west of Greenwich */ | |
25 | int tz_dsttime; /* type of dst correction */ | |
26 | }; | |
27 | ||
28 | #ifdef __KERNEL__ | |
29 | ||
30 | /* Parameters used to convert the timespec values */ | |
31 | #ifndef USEC_PER_SEC | |
32 | #define USEC_PER_SEC (1000000L) | |
33 | #endif | |
34 | ||
35 | #ifndef NSEC_PER_SEC | |
36 | #define NSEC_PER_SEC (1000000000L) | |
37 | #endif | |
38 | ||
39 | #ifndef NSEC_PER_USEC | |
40 | #define NSEC_PER_USEC (1000L) | |
41 | #endif | |
42 | ||
43 | static __inline__ int timespec_equal(struct timespec *a, struct timespec *b) | |
44 | { | |
45 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); | |
46 | } | |
47 | ||
48 | /* Converts Gregorian date to seconds since 1970-01-01 00:00:00. | |
49 | * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 | |
50 | * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. | |
51 | * | |
52 | * [For the Julian calendar (which was used in Russia before 1917, | |
53 | * Britain & colonies before 1752, anywhere else before 1582, | |
54 | * and is still in use by some communities) leave out the | |
55 | * -year/100+year/400 terms, and add 10.] | |
56 | * | |
57 | * This algorithm was first published by Gauss (I think). | |
58 | * | |
59 | * WARNING: this function will overflow on 2106-02-07 06:28:16 on | |
60 | * machines were long is 32-bit! (However, as time_t is signed, we | |
61 | * will already get problems at other places on 2038-01-19 03:14:08) | |
62 | */ | |
63 | static inline unsigned long | |
64 | mktime (unsigned int year, unsigned int mon, | |
65 | unsigned int day, unsigned int hour, | |
66 | unsigned int min, unsigned int sec) | |
67 | { | |
68 | if (0 >= (int) (mon -= 2)) { /* 1..12 -> 11,12,1..10 */ | |
69 | mon += 12; /* Puts Feb last since it has leap day */ | |
70 | year -= 1; | |
71 | } | |
72 | ||
73 | return ((( | |
74 | (unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) + | |
75 | year*365 - 719499 | |
76 | )*24 + hour /* now have hours */ | |
77 | )*60 + min /* now have minutes */ | |
78 | )*60 + sec; /* finally seconds */ | |
79 | } | |
80 | ||
81 | extern struct timespec xtime; | |
82 | extern struct timespec wall_to_monotonic; | |
83 | extern seqlock_t xtime_lock; | |
84 | ||
85 | static inline unsigned long get_seconds(void) | |
86 | { | |
87 | return xtime.tv_sec; | |
88 | } | |
89 | ||
90 | struct timespec current_kernel_time(void); | |
91 | ||
92 | #define CURRENT_TIME (current_kernel_time()) | |
93 | #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 }) | |
94 | ||
95 | extern void do_gettimeofday(struct timeval *tv); | |
96 | extern int do_settimeofday(struct timespec *tv); | |
97 | extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); | |
98 | extern void clock_was_set(void); // call when ever the clock is set | |
99 | extern int do_posix_clock_monotonic_gettime(struct timespec *tp); | |
1da177e4 LT |
100 | extern long do_utimes(char __user * filename, struct timeval * times); |
101 | struct itimerval; | |
102 | extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue); | |
103 | extern int do_getitimer(int which, struct itimerval *value); | |
104 | extern void getnstimeofday (struct timespec *tv); | |
105 | ||
106 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); | |
107 | ||
108 | static inline void | |
109 | set_normalized_timespec (struct timespec *ts, time_t sec, long nsec) | |
110 | { | |
111 | while (nsec > NSEC_PER_SEC) { | |
112 | nsec -= NSEC_PER_SEC; | |
113 | ++sec; | |
114 | } | |
115 | while (nsec < 0) { | |
116 | nsec += NSEC_PER_SEC; | |
117 | --sec; | |
118 | } | |
119 | ts->tv_sec = sec; | |
120 | ts->tv_nsec = nsec; | |
121 | } | |
122 | ||
123 | #endif /* __KERNEL__ */ | |
124 | ||
125 | #define NFDBITS __NFDBITS | |
126 | ||
127 | #define FD_SETSIZE __FD_SETSIZE | |
128 | #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) | |
129 | #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) | |
130 | #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) | |
131 | #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) | |
132 | ||
133 | /* | |
134 | * Names of the interval timers, and structure | |
135 | * defining a timer setting. | |
136 | */ | |
137 | #define ITIMER_REAL 0 | |
138 | #define ITIMER_VIRTUAL 1 | |
139 | #define ITIMER_PROF 2 | |
140 | ||
141 | struct itimerspec { | |
142 | struct timespec it_interval; /* timer period */ | |
143 | struct timespec it_value; /* timer expiration */ | |
144 | }; | |
145 | ||
146 | struct itimerval { | |
147 | struct timeval it_interval; /* timer interval */ | |
148 | struct timeval it_value; /* current value */ | |
149 | }; | |
150 | ||
151 | ||
152 | /* | |
153 | * The IDs of the various system clocks (for POSIX.1b interval timers). | |
154 | */ | |
155 | #define CLOCK_REALTIME 0 | |
156 | #define CLOCK_MONOTONIC 1 | |
157 | #define CLOCK_PROCESS_CPUTIME_ID 2 | |
158 | #define CLOCK_THREAD_CPUTIME_ID 3 | |
159 | #define CLOCK_REALTIME_HR 4 | |
160 | #define CLOCK_MONOTONIC_HR 5 | |
161 | ||
162 | /* | |
163 | * The IDs of various hardware clocks | |
164 | */ | |
165 | ||
166 | ||
167 | #define CLOCK_SGI_CYCLE 10 | |
168 | #define MAX_CLOCKS 16 | |
169 | #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC | \ | |
170 | CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR) | |
171 | #define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR) | |
172 | ||
173 | /* | |
174 | * The various flags for setting POSIX.1b interval timers. | |
175 | */ | |
176 | ||
177 | #define TIMER_ABSTIME 0x01 | |
178 | ||
179 | ||
180 | #endif |