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_MSEC 1000L
33 #define NSEC_PER_USEC 1000L
34 #define NSEC_PER_MSEC 1000000L
35 #define USEC_PER_SEC 1000000L
36 #define NSEC_PER_SEC 1000000000L
37 #define FSEC_PER_SEC 1000000000000000L
39 static inline int timespec_equal(struct timespec *a, struct timespec *b)
41 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
45 * lhs < rhs: return <0
46 * lhs == rhs: return 0
47 * lhs > rhs: return >0
49 static inline int timespec_compare(struct timespec *lhs, struct timespec *rhs)
51 if (lhs->tv_sec < rhs->tv_sec)
53 if (lhs->tv_sec > rhs->tv_sec)
55 return lhs->tv_nsec - rhs->tv_nsec;
58 static inline int timeval_compare(struct timeval *lhs, struct timeval *rhs)
60 if (lhs->tv_sec < rhs->tv_sec)
62 if (lhs->tv_sec > rhs->tv_sec)
64 return lhs->tv_usec - rhs->tv_usec;
67 extern unsigned long mktime(const unsigned int year, const unsigned int mon,
68 const unsigned int day, const unsigned int hour,
69 const unsigned int min, const unsigned int sec);
71 extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
74 * sub = lhs - rhs, in normalized form
76 static inline struct timespec timespec_sub(struct timespec lhs,
79 struct timespec ts_delta;
80 set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
81 lhs.tv_nsec - rhs.tv_nsec);
86 * Returns true if the timespec is norm, false if denorm:
88 #define timespec_valid(ts) \
89 (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
91 extern struct timespec xtime;
92 extern struct timespec wall_to_monotonic;
93 extern seqlock_t xtime_lock;
95 void timekeeping_init(void);
97 static inline unsigned long get_seconds(void)
102 struct timespec current_kernel_time(void);
104 #define CURRENT_TIME (current_kernel_time())
105 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
107 extern void do_gettimeofday(struct timeval *tv);
108 extern int do_settimeofday(struct timespec *tv);
109 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
110 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
111 extern long do_utimes(int dfd, char __user *filename, struct timeval *times);
113 extern int do_setitimer(int which, struct itimerval *value,
114 struct itimerval *ovalue);
115 extern unsigned int alarm_setitimer(unsigned int seconds);
116 extern int do_getitimer(int which, struct itimerval *value);
117 extern void getnstimeofday(struct timespec *tv);
119 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
120 extern int timekeeping_is_continuous(void);
123 * timespec_to_ns - Convert timespec to nanoseconds
124 * @ts: pointer to the timespec variable to be converted
126 * Returns the scalar nanosecond representation of the timespec
129 static inline s64 timespec_to_ns(const struct timespec *ts)
131 return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
135 * timeval_to_ns - Convert timeval to nanoseconds
136 * @ts: pointer to the timeval variable to be converted
138 * Returns the scalar nanosecond representation of the timeval
141 static inline s64 timeval_to_ns(const struct timeval *tv)
143 return ((s64) tv->tv_sec * NSEC_PER_SEC) +
144 tv->tv_usec * NSEC_PER_USEC;
148 * ns_to_timespec - Convert nanoseconds to timespec
149 * @nsec: the nanoseconds value to be converted
151 * Returns the timespec representation of the nsec parameter.
153 extern struct timespec ns_to_timespec(const s64 nsec);
156 * ns_to_timeval - Convert nanoseconds to timeval
157 * @nsec: the nanoseconds value to be converted
159 * Returns the timeval representation of the nsec parameter.
161 extern struct timeval ns_to_timeval(const s64 nsec);
164 * timespec_add_ns - Adds nanoseconds to a timespec
165 * @a: pointer to timespec to be incremented
166 * @ns: unsigned nanoseconds value to be added
168 static inline void timespec_add_ns(struct timespec *a, u64 ns)
171 while(unlikely(ns >= NSEC_PER_SEC)) {
177 #endif /* __KERNEL__ */
179 #define NFDBITS __NFDBITS
181 #define FD_SETSIZE __FD_SETSIZE
182 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
183 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
184 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
185 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
188 * Names of the interval timers, and structure
189 * defining a timer setting:
191 #define ITIMER_REAL 0
192 #define ITIMER_VIRTUAL 1
193 #define ITIMER_PROF 2
196 struct timespec it_interval; /* timer period */
197 struct timespec it_value; /* timer expiration */
201 struct timeval it_interval; /* timer interval */
202 struct timeval it_value; /* current value */
206 * The IDs of the various system clocks (for POSIX.1b interval timers):
208 #define CLOCK_REALTIME 0
209 #define CLOCK_MONOTONIC 1
210 #define CLOCK_PROCESS_CPUTIME_ID 2
211 #define CLOCK_THREAD_CPUTIME_ID 3
214 * The IDs of various hardware clocks:
216 #define CLOCK_SGI_CYCLE 10
217 #define MAX_CLOCKS 16
218 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
219 #define CLOCKS_MONO CLOCK_MONOTONIC
222 * The various flags for setting POSIX.1b interval timers:
224 #define TIMER_ABSTIME 0x01