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);
42 * lhs < rhs: return <0
43 * lhs == rhs: return 0
44 * lhs > rhs: return >0
46 static inline int timespec_compare(struct timespec *lhs, struct timespec *rhs)
48 if (lhs->tv_sec < rhs->tv_sec)
50 if (lhs->tv_sec > rhs->tv_sec)
52 return lhs->tv_nsec - rhs->tv_nsec;
55 static inline int timeval_compare(struct timeval *lhs, struct timeval *rhs)
57 if (lhs->tv_sec < rhs->tv_sec)
59 if (lhs->tv_sec > rhs->tv_sec)
61 return lhs->tv_usec - rhs->tv_usec;
64 extern unsigned long mktime(const unsigned int year, const unsigned int mon,
65 const unsigned int day, const unsigned int hour,
66 const unsigned int min, const unsigned int sec);
68 extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
71 * Returns true if the timespec is norm, false if denorm:
73 #define timespec_valid(ts) \
74 (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
76 extern struct timespec xtime;
77 extern struct timespec wall_to_monotonic;
78 extern seqlock_t xtime_lock;
80 void timekeeping_init(void);
82 static inline unsigned long get_seconds(void)
87 struct timespec current_kernel_time(void);
89 #define CURRENT_TIME (current_kernel_time())
90 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
92 extern void do_gettimeofday(struct timeval *tv);
93 extern int do_settimeofday(struct timespec *tv);
94 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
95 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
96 extern long do_utimes(int dfd, char __user *filename, struct timeval *times);
98 extern int do_setitimer(int which, struct itimerval *value,
99 struct itimerval *ovalue);
100 extern unsigned int alarm_setitimer(unsigned int seconds);
101 extern int do_getitimer(int which, struct itimerval *value);
102 extern void getnstimeofday(struct timespec *tv);
104 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
105 extern int timekeeping_is_continuous(void);
108 * timespec_to_ns - Convert timespec to nanoseconds
109 * @ts: pointer to the timespec variable to be converted
111 * Returns the scalar nanosecond representation of the timespec
114 static inline s64 timespec_to_ns(const struct timespec *ts)
116 return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
120 * timeval_to_ns - Convert timeval to nanoseconds
121 * @ts: pointer to the timeval variable to be converted
123 * Returns the scalar nanosecond representation of the timeval
126 static inline s64 timeval_to_ns(const struct timeval *tv)
128 return ((s64) tv->tv_sec * NSEC_PER_SEC) +
129 tv->tv_usec * NSEC_PER_USEC;
133 * ns_to_timespec - Convert nanoseconds to timespec
134 * @nsec: the nanoseconds value to be converted
136 * Returns the timespec representation of the nsec parameter.
138 extern struct timespec ns_to_timespec(const s64 nsec);
141 * ns_to_timeval - Convert nanoseconds to timeval
142 * @nsec: the nanoseconds value to be converted
144 * Returns the timeval representation of the nsec parameter.
146 extern struct timeval ns_to_timeval(const s64 nsec);
149 * timespec_add_ns - Adds nanoseconds to a timespec
150 * @a: pointer to timespec to be incremented
151 * @ns: unsigned nanoseconds value to be added
153 static inline void timespec_add_ns(struct timespec *a, u64 ns)
156 while(unlikely(ns >= NSEC_PER_SEC)) {
162 #endif /* __KERNEL__ */
164 #define NFDBITS __NFDBITS
166 #define FD_SETSIZE __FD_SETSIZE
167 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
168 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
169 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
170 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
173 * Names of the interval timers, and structure
174 * defining a timer setting:
176 #define ITIMER_REAL 0
177 #define ITIMER_VIRTUAL 1
178 #define ITIMER_PROF 2
181 struct timespec it_interval; /* timer period */
182 struct timespec it_value; /* timer expiration */
186 struct timeval it_interval; /* timer interval */
187 struct timeval it_value; /* current value */
191 * The IDs of the various system clocks (for POSIX.1b interval timers):
193 #define CLOCK_REALTIME 0
194 #define CLOCK_MONOTONIC 1
195 #define CLOCK_PROCESS_CPUTIME_ID 2
196 #define CLOCK_THREAD_CPUTIME_ID 3
199 * The IDs of various hardware clocks:
201 #define CLOCK_SGI_CYCLE 10
202 #define MAX_CLOCKS 16
203 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
204 #define CLOCKS_MONO CLOCK_MONOTONIC
207 * The various flags for setting POSIX.1b interval timers:
209 #define TIMER_ABSTIME 0x01