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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__ | |
57a55875 | 7 | # include <linux/seqlock.h> |
1da177e4 LT |
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 | }; | |
57a55875 | 16 | #endif |
1da177e4 LT |
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 | ||
57a55875 IM |
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 | |
1da177e4 | 35 | |
57a55875 IM |
36 | static __inline__ int timespec_equal(struct timespec *a, struct timespec *b) |
37 | { | |
1da177e4 | 38 | return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec); |
57a55875 | 39 | } |
1da177e4 | 40 | |
f4818900 IM |
41 | extern unsigned long mktime(const unsigned int year, const unsigned int mon, |
42 | const unsigned int day, const unsigned int hour, | |
43 | const unsigned int min, const unsigned int sec); | |
44 | ||
45 | extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec); | |
1da177e4 | 46 | |
5f82b2b7 TG |
47 | /* |
48 | * Returns true if the timespec is norm, false if denorm: | |
49 | */ | |
50 | #define timespec_valid(ts) \ | |
51 | (((ts)->tv_sec >= 0) && (((unsigned) (ts)->tv_nsec) < NSEC_PER_SEC)) | |
52 | ||
1da177e4 LT |
53 | extern struct timespec xtime; |
54 | extern struct timespec wall_to_monotonic; | |
55 | extern seqlock_t xtime_lock; | |
56 | ||
57 | static inline unsigned long get_seconds(void) | |
57a55875 | 58 | { |
1da177e4 LT |
59 | return xtime.tv_sec; |
60 | } | |
61 | ||
62 | struct timespec current_kernel_time(void); | |
63 | ||
57a55875 IM |
64 | #define CURRENT_TIME (current_kernel_time()) |
65 | #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 }) | |
1da177e4 LT |
66 | |
67 | extern void do_gettimeofday(struct timeval *tv); | |
68 | extern int do_settimeofday(struct timespec *tv); | |
69 | extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); | |
57a55875 | 70 | extern void clock_was_set(void); // call whenever the clock is set |
1da177e4 | 71 | extern int do_posix_clock_monotonic_gettime(struct timespec *tp); |
57a55875 | 72 | extern long do_utimes(char __user *filename, struct timeval *times); |
1da177e4 | 73 | struct itimerval; |
57a55875 IM |
74 | extern int do_setitimer(int which, struct itimerval *value, |
75 | struct itimerval *ovalue); | |
1da177e4 | 76 | extern int do_getitimer(int which, struct itimerval *value); |
57a55875 | 77 | extern void getnstimeofday(struct timespec *tv); |
64123fd4 | 78 | extern void getnstimestamp(struct timespec *ts); |
1da177e4 LT |
79 | |
80 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); | |
81 | ||
1da177e4 LT |
82 | #endif /* __KERNEL__ */ |
83 | ||
84 | #define NFDBITS __NFDBITS | |
85 | ||
86 | #define FD_SETSIZE __FD_SETSIZE | |
87 | #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp) | |
88 | #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp) | |
89 | #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp) | |
90 | #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp) | |
91 | ||
92 | /* | |
93 | * Names of the interval timers, and structure | |
57a55875 | 94 | * defining a timer setting: |
1da177e4 | 95 | */ |
57a55875 IM |
96 | #define ITIMER_REAL 0 |
97 | #define ITIMER_VIRTUAL 1 | |
98 | #define ITIMER_PROF 2 | |
1da177e4 | 99 | |
57a55875 IM |
100 | struct itimerspec { |
101 | struct timespec it_interval; /* timer period */ | |
102 | struct timespec it_value; /* timer expiration */ | |
1da177e4 LT |
103 | }; |
104 | ||
57a55875 IM |
105 | struct itimerval { |
106 | struct timeval it_interval; /* timer interval */ | |
107 | struct timeval it_value; /* current value */ | |
1da177e4 LT |
108 | }; |
109 | ||
1da177e4 | 110 | /* |
57a55875 | 111 | * The IDs of the various system clocks (for POSIX.1b interval timers): |
1da177e4 | 112 | */ |
1ad106ca IM |
113 | #define CLOCK_REALTIME 0 |
114 | #define CLOCK_MONOTONIC 1 | |
115 | #define CLOCK_PROCESS_CPUTIME_ID 2 | |
116 | #define CLOCK_THREAD_CPUTIME_ID 3 | |
1da177e4 LT |
117 | |
118 | /* | |
57a55875 | 119 | * The IDs of various hardware clocks: |
1da177e4 | 120 | */ |
1ad106ca IM |
121 | #define CLOCK_SGI_CYCLE 10 |
122 | #define MAX_CLOCKS 16 | |
123 | #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC) | |
124 | #define CLOCKS_MONO CLOCK_MONOTONIC | |
1da177e4 LT |
125 | |
126 | /* | |
57a55875 | 127 | * The various flags for setting POSIX.1b interval timers: |
1da177e4 | 128 | */ |
1ad106ca | 129 | #define TIMER_ABSTIME 0x01 |
1da177e4 LT |
130 | |
131 | #endif |