Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Nishanth Aravamudan | 84f902c | 2005-09-10 00:27:22 -0700 | [diff] [blame] | 31 | #define MSEC_PER_SEC (1000L) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #define USEC_PER_SEC (1000000L) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define NSEC_PER_SEC (1000000000L) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #define NSEC_PER_USEC (1000L) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ingo Molnar | f481890 | 2006-01-09 20:52:23 -0800 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | extern struct timespec xtime; |
| 48 | extern struct timespec wall_to_monotonic; |
| 49 | extern seqlock_t xtime_lock; |
| 50 | |
| 51 | static inline unsigned long get_seconds(void) |
| 52 | { |
| 53 | return xtime.tv_sec; |
| 54 | } |
| 55 | |
| 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Matt Helsley | 64123fd | 2005-12-12 00:37:09 -0800 | [diff] [blame] | 71 | extern void getnstimestamp(struct timespec *ts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | extern struct timespec timespec_trunc(struct timespec t, unsigned gran); |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Thomas Gleixner | 0c4f6ee | 2006-01-09 20:52:25 -0800 | [diff] [blame^] | 107 | #define CLOCK_REALTIME 0 |
| 108 | #define CLOCK_MONOTONIC 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #define CLOCK_PROCESS_CPUTIME_ID 2 |
| 110 | #define CLOCK_THREAD_CPUTIME_ID 3 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | /* |
| 113 | * The IDs of various hardware clocks |
| 114 | */ |
| 115 | |
| 116 | |
| 117 | #define CLOCK_SGI_CYCLE 10 |
| 118 | #define MAX_CLOCKS 16 |
Thomas Gleixner | 0c4f6ee | 2006-01-09 20:52:25 -0800 | [diff] [blame^] | 119 | #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC) |
| 120 | #define CLOCKS_MONO (CLOCK_MONOTONIC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * The various flags for setting POSIX.1b interval timers. |
| 124 | */ |
| 125 | |
| 126 | #define TIMER_ABSTIME 0x01 |
| 127 | |
| 128 | |
| 129 | #endif |