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 static inline unsigned long get_seconds(void)
88 struct timespec current_kernel_time(void);
90 #define CURRENT_TIME (current_kernel_time())
91 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
93 extern void do_gettimeofday(struct timeval *tv);
94 extern int do_settimeofday(struct timespec *tv);
95 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
96 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
97 extern long do_utimes(int dfd, char __user *filename, struct timeval *times);
99 extern int do_setitimer(int which, struct itimerval *value,
100 struct itimerval *ovalue);
101 extern unsigned int alarm_setitimer(unsigned int seconds);
102 extern int do_getitimer(int which, struct itimerval *value);
103 extern void getnstimeofday(struct timespec *tv);
105 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
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);
148 #endif /* __KERNEL__ */
150 #define NFDBITS __NFDBITS
152 #define FD_SETSIZE __FD_SETSIZE
153 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
154 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
155 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
156 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
159 * Names of the interval timers, and structure
160 * defining a timer setting:
162 #define ITIMER_REAL 0
163 #define ITIMER_VIRTUAL 1
164 #define ITIMER_PROF 2
167 struct timespec it_interval; /* timer period */
168 struct timespec it_value; /* timer expiration */
172 struct timeval it_interval; /* timer interval */
173 struct timeval it_value; /* current value */
177 * The IDs of the various system clocks (for POSIX.1b interval timers):
179 #define CLOCK_REALTIME 0
180 #define CLOCK_MONOTONIC 1
181 #define CLOCK_PROCESS_CPUTIME_ID 2
182 #define CLOCK_THREAD_CPUTIME_ID 3
185 * The IDs of various hardware clocks:
187 #define CLOCK_SGI_CYCLE 10
188 #define MAX_CLOCKS 16
189 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
190 #define CLOCKS_MONO CLOCK_MONOTONIC
193 * The various flags for setting POSIX.1b interval timers:
195 #define TIMER_ABSTIME 0x01