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 * Returns true if the timespec is norm, false if denorm:
76 #define timespec_valid(ts) \
77 (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
79 extern struct timespec xtime;
80 extern struct timespec wall_to_monotonic;
81 extern seqlock_t xtime_lock;
83 void timekeeping_init(void);
85 static inline unsigned long get_seconds(void)
90 struct timespec current_kernel_time(void);
92 #define CURRENT_TIME (current_kernel_time())
93 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
95 extern void do_gettimeofday(struct timeval *tv);
96 extern int do_settimeofday(struct timespec *tv);
97 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
98 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
99 extern long do_utimes(int dfd, char __user *filename, struct timeval *times);
101 extern int do_setitimer(int which, struct itimerval *value,
102 struct itimerval *ovalue);
103 extern unsigned int alarm_setitimer(unsigned int seconds);
104 extern int do_getitimer(int which, struct itimerval *value);
105 extern void getnstimeofday(struct timespec *tv);
107 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
108 extern int timekeeping_is_continuous(void);
111 * timespec_to_ns - Convert timespec to nanoseconds
112 * @ts: pointer to the timespec variable to be converted
114 * Returns the scalar nanosecond representation of the timespec
117 static inline s64 timespec_to_ns(const struct timespec *ts)
119 return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
123 * timeval_to_ns - Convert timeval to nanoseconds
124 * @ts: pointer to the timeval variable to be converted
126 * Returns the scalar nanosecond representation of the timeval
129 static inline s64 timeval_to_ns(const struct timeval *tv)
131 return ((s64) tv->tv_sec * NSEC_PER_SEC) +
132 tv->tv_usec * NSEC_PER_USEC;
136 * ns_to_timespec - Convert nanoseconds to timespec
137 * @nsec: the nanoseconds value to be converted
139 * Returns the timespec representation of the nsec parameter.
141 extern struct timespec ns_to_timespec(const s64 nsec);
144 * ns_to_timeval - Convert nanoseconds to timeval
145 * @nsec: the nanoseconds value to be converted
147 * Returns the timeval representation of the nsec parameter.
149 extern struct timeval ns_to_timeval(const s64 nsec);
152 * timespec_add_ns - Adds nanoseconds to a timespec
153 * @a: pointer to timespec to be incremented
154 * @ns: unsigned nanoseconds value to be added
156 static inline void timespec_add_ns(struct timespec *a, u64 ns)
159 while(unlikely(ns >= NSEC_PER_SEC)) {
165 #endif /* __KERNEL__ */
167 #define NFDBITS __NFDBITS
169 #define FD_SETSIZE __FD_SETSIZE
170 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
171 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
172 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
173 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
176 * Names of the interval timers, and structure
177 * defining a timer setting:
179 #define ITIMER_REAL 0
180 #define ITIMER_VIRTUAL 1
181 #define ITIMER_PROF 2
184 struct timespec it_interval; /* timer period */
185 struct timespec it_value; /* timer expiration */
189 struct timeval it_interval; /* timer interval */
190 struct timeval it_value; /* current value */
194 * The IDs of the various system clocks (for POSIX.1b interval timers):
196 #define CLOCK_REALTIME 0
197 #define CLOCK_MONOTONIC 1
198 #define CLOCK_PROCESS_CPUTIME_ID 2
199 #define CLOCK_THREAD_CPUTIME_ID 3
202 * The IDs of various hardware clocks:
204 #define CLOCK_SGI_CYCLE 10
205 #define MAX_CLOCKS 16
206 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
207 #define CLOCKS_MONO CLOCK_MONOTONIC
210 * The various flags for setting POSIX.1b interval timers:
212 #define TIMER_ABSTIME 0x01