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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 */ | |
84f902c0 | 31 | #define MSEC_PER_SEC (1000L) |
1da177e4 | 32 | #define USEC_PER_SEC (1000000L) |
1da177e4 | 33 | #define NSEC_PER_SEC (1000000000L) |
1da177e4 | 34 | #define NSEC_PER_USEC (1000L) |
1da177e4 LT |
35 | |
36 | static __inline__ int timespec_equal(struct timespec *a, struct timespec *b) | |
37 | { | |
38 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); | |
39 | } | |
40 | ||
753be622 TG |
41 | extern unsigned long mktime (unsigned int year, unsigned int mon, |
42 | unsigned int day, unsigned int hour, | |
43 | unsigned int min, unsigned int sec); | |
1da177e4 LT |
44 | |
45 | extern struct timespec xtime; | |
46 | extern struct timespec wall_to_monotonic; | |
47 | extern seqlock_t xtime_lock; | |
48 | ||
49 | static inline unsigned long get_seconds(void) | |
50 | { | |
51 | return xtime.tv_sec; | |
52 | } | |
53 | ||
753be622 TG |
54 | extern void set_normalized_timespec (struct timespec *ts, time_t sec, long nsec); |
55 | ||
1da177e4 LT |
56 | struct timespec current_kernel_time(void); |
57 | ||
58 | #define CURRENT_TIME (current_kernel_time()) | |
59 | #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 }) | |
60 | ||
61 | extern void do_gettimeofday(struct timeval *tv); | |
62 | extern int do_settimeofday(struct timespec *tv); | |
63 | extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); | |
64 | extern void clock_was_set(void); // call when ever the clock is set | |
65 | extern int do_posix_clock_monotonic_gettime(struct timespec *tp); | |
1da177e4 LT |
66 | extern long do_utimes(char __user * filename, struct timeval * times); |
67 | struct itimerval; | |
68 | extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue); | |
69 | extern int do_getitimer(int which, struct itimerval *value); | |
70 | extern void getnstimeofday (struct timespec *tv); | |
64123fd4 | 71 | extern void getnstimestamp(struct timespec *ts); |
1da177e4 LT |
72 | |
73 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); | |
74 | ||
1da177e4 LT |
75 | #endif /* __KERNEL__ */ |
76 | ||
77 | #define NFDBITS __NFDBITS | |
78 | ||
79 | #define FD_SETSIZE __FD_SETSIZE | |
80 | #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) | |
81 | #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) | |
82 | #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) | |
83 | #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) | |
84 | ||
85 | /* | |
86 | * Names of the interval timers, and structure | |
87 | * defining a timer setting. | |
88 | */ | |
89 | #define ITIMER_REAL 0 | |
90 | #define ITIMER_VIRTUAL 1 | |
91 | #define ITIMER_PROF 2 | |
92 | ||
93 | struct itimerspec { | |
94 | struct timespec it_interval; /* timer period */ | |
95 | struct timespec it_value; /* timer expiration */ | |
96 | }; | |
97 | ||
98 | struct itimerval { | |
99 | struct timeval it_interval; /* timer interval */ | |
100 | struct timeval it_value; /* current value */ | |
101 | }; | |
102 | ||
103 | ||
104 | /* | |
105 | * The IDs of the various system clocks (for POSIX.1b interval timers). | |
106 | */ | |
107 | #define CLOCK_REALTIME 0 | |
108 | #define CLOCK_MONOTONIC 1 | |
109 | #define CLOCK_PROCESS_CPUTIME_ID 2 | |
110 | #define CLOCK_THREAD_CPUTIME_ID 3 | |
111 | #define CLOCK_REALTIME_HR 4 | |
112 | #define CLOCK_MONOTONIC_HR 5 | |
113 | ||
114 | /* | |
115 | * The IDs of various hardware clocks | |
116 | */ | |
117 | ||
118 | ||
119 | #define CLOCK_SGI_CYCLE 10 | |
120 | #define MAX_CLOCKS 16 | |
121 | #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC | \ | |
122 | CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR) | |
123 | #define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR) | |
124 | ||
125 | /* | |
126 | * The various flags for setting POSIX.1b interval timers. | |
127 | */ | |
128 | ||
129 | #define TIMER_ABSTIME 0x01 | |
130 | ||
131 | ||
132 | #endif |