diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/time.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/time.h')
-rw-r--r-- | include/linux/time.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/include/linux/time.h b/include/linux/time.h new file mode 100644 index 000000000000..5634497ff5df --- /dev/null +++ b/include/linux/time.h | |||
@@ -0,0 +1,181 @@ | |||
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); | ||
100 | extern long do_nanosleep(struct timespec *t); | ||
101 | extern long do_utimes(char __user * filename, struct timeval * times); | ||
102 | struct itimerval; | ||
103 | extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue); | ||
104 | extern int do_getitimer(int which, struct itimerval *value); | ||
105 | extern void getnstimeofday (struct timespec *tv); | ||
106 | |||
107 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); | ||
108 | |||
109 | static inline void | ||
110 | set_normalized_timespec (struct timespec *ts, time_t sec, long nsec) | ||
111 | { | ||
112 | while (nsec > NSEC_PER_SEC) { | ||
113 | nsec -= NSEC_PER_SEC; | ||
114 | ++sec; | ||
115 | } | ||
116 | while (nsec < 0) { | ||
117 | nsec += NSEC_PER_SEC; | ||
118 | --sec; | ||
119 | } | ||
120 | ts->tv_sec = sec; | ||
121 | ts->tv_nsec = nsec; | ||
122 | } | ||
123 | |||
124 | #endif /* __KERNEL__ */ | ||
125 | |||
126 | #define NFDBITS __NFDBITS | ||
127 | |||
128 | #define FD_SETSIZE __FD_SETSIZE | ||
129 | #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) | ||
130 | #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) | ||
131 | #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) | ||
132 | #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) | ||
133 | |||
134 | /* | ||
135 | * Names of the interval timers, and structure | ||
136 | * defining a timer setting. | ||
137 | */ | ||
138 | #define ITIMER_REAL 0 | ||
139 | #define ITIMER_VIRTUAL 1 | ||
140 | #define ITIMER_PROF 2 | ||
141 | |||
142 | struct itimerspec { | ||
143 | struct timespec it_interval; /* timer period */ | ||
144 | struct timespec it_value; /* timer expiration */ | ||
145 | }; | ||
146 | |||
147 | struct itimerval { | ||
148 | struct timeval it_interval; /* timer interval */ | ||
149 | struct timeval it_value; /* current value */ | ||
150 | }; | ||
151 | |||
152 | |||
153 | /* | ||
154 | * The IDs of the various system clocks (for POSIX.1b interval timers). | ||
155 | */ | ||
156 | #define CLOCK_REALTIME 0 | ||
157 | #define CLOCK_MONOTONIC 1 | ||
158 | #define CLOCK_PROCESS_CPUTIME_ID 2 | ||
159 | #define CLOCK_THREAD_CPUTIME_ID 3 | ||
160 | #define CLOCK_REALTIME_HR 4 | ||
161 | #define CLOCK_MONOTONIC_HR 5 | ||
162 | |||
163 | /* | ||
164 | * The IDs of various hardware clocks | ||
165 | */ | ||
166 | |||
167 | |||
168 | #define CLOCK_SGI_CYCLE 10 | ||
169 | #define MAX_CLOCKS 16 | ||
170 | #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC | \ | ||
171 | CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR) | ||
172 | #define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR) | ||
173 | |||
174 | /* | ||
175 | * The various flags for setting POSIX.1b interval timers. | ||
176 | */ | ||
177 | |||
178 | #define TIMER_ABSTIME 0x01 | ||
179 | |||
180 | |||
181 | #endif | ||