4 #include <linux/types.h>
7 # include <linux/seqlock.h>
10 #ifndef _STRUCT_TIMESPEC
11 #define _STRUCT_TIMESPEC
13 time_t tv_sec; /* seconds */
14 long tv_nsec; /* nanoseconds */
19 time_t tv_sec; /* seconds */
20 suseconds_t tv_usec; /* microseconds */
24 int tz_minuteswest; /* minutes west of Greenwich */
25 int tz_dsttime; /* type of dst correction */
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
36 static __inline__ int timespec_equal(struct timespec *a, struct timespec *b)
38 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
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);
45 extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
48 * Returns true if the timespec is norm, false if denorm:
50 #define timespec_valid(ts) \
51 (((ts)->tv_sec >= 0) && (((unsigned) (ts)->tv_nsec) < NSEC_PER_SEC))
54 * 64-bit nanosec type. Large enough to span 292+ years in nanosecond
55 * resolution. Ought to be enough for a while.
59 extern struct timespec xtime;
60 extern struct timespec wall_to_monotonic;
61 extern seqlock_t xtime_lock;
63 static inline unsigned long get_seconds(void)
68 struct timespec current_kernel_time(void);
70 #define CURRENT_TIME (current_kernel_time())
71 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
73 extern void do_gettimeofday(struct timeval *tv);
74 extern int do_settimeofday(struct timespec *tv);
75 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
76 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
77 extern long do_utimes(char __user *filename, struct timeval *times);
79 extern int do_setitimer(int which, struct itimerval *value,
80 struct itimerval *ovalue);
81 extern int do_getitimer(int which, struct itimerval *value);
82 extern void getnstimeofday(struct timespec *tv);
83 extern void getnstimestamp(struct timespec *ts);
85 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
88 * timespec_to_ns - Convert timespec to nanoseconds
89 * @ts: pointer to the timespec variable to be converted
91 * Returns the scalar nanosecond representation of the timespec
94 static inline nsec_t timespec_to_ns(const struct timespec *ts)
96 return ((nsec_t) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
100 * timeval_to_ns - Convert timeval to nanoseconds
101 * @ts: pointer to the timeval variable to be converted
103 * Returns the scalar nanosecond representation of the timeval
106 static inline nsec_t timeval_to_ns(const struct timeval *tv)
108 return ((nsec_t) tv->tv_sec * NSEC_PER_SEC) +
109 tv->tv_usec * NSEC_PER_USEC;
113 * ns_to_timespec - Convert nanoseconds to timespec
114 * @nsec: the nanoseconds value to be converted
116 * Returns the timespec representation of the nsec parameter.
118 extern struct timespec ns_to_timespec(const nsec_t nsec);
121 * ns_to_timeval - Convert nanoseconds to timeval
122 * @nsec: the nanoseconds value to be converted
124 * Returns the timeval representation of the nsec parameter.
126 extern struct timeval ns_to_timeval(const nsec_t nsec);
128 #endif /* __KERNEL__ */
130 #define NFDBITS __NFDBITS
132 #define FD_SETSIZE __FD_SETSIZE
133 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
134 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
135 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
136 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
139 * Names of the interval timers, and structure
140 * defining a timer setting:
142 #define ITIMER_REAL 0
143 #define ITIMER_VIRTUAL 1
144 #define ITIMER_PROF 2
147 struct timespec it_interval; /* timer period */
148 struct timespec it_value; /* timer expiration */
152 struct timeval it_interval; /* timer interval */
153 struct timeval it_value; /* current value */
157 * The IDs of the various system clocks (for POSIX.1b interval timers):
159 #define CLOCK_REALTIME 0
160 #define CLOCK_MONOTONIC 1
161 #define CLOCK_PROCESS_CPUTIME_ID 2
162 #define CLOCK_THREAD_CPUTIME_ID 3
165 * The IDs of various hardware clocks:
167 #define CLOCK_SGI_CYCLE 10
168 #define MAX_CLOCKS 16
169 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
170 #define CLOCKS_MONO CLOCK_MONOTONIC
173 * The various flags for setting POSIX.1b interval timers:
175 #define TIMER_ABSTIME 0x01