9 #include <sys/select.h>
11 int gettimeofday (struct timeval *__restrict, void *__restrict);
14 #define ITIMER_VIRTUAL 1
18 struct timeval it_interval;
19 struct timeval it_value;
22 int getitimer (int, struct itimerval *);
23 int setitimer (int, const struct itimerval *__restrict, struct itimerval *__restrict);
24 int utimes (const char *, const struct timeval [2]);
26 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
31 int futimes(int, const struct timeval [2]);
32 int futimesat(int, const char *, const struct timeval [2]);
33 int lutimes(const char *, const struct timeval [2]);
34 int settimeofday(const struct timeval *, const struct timezone *);
35 int adjtime (const struct timeval *, struct timeval *);
36 #define timerisset(t) ((t)->tv_sec || (t)->tv_usec)
37 #define timerclear(t) ((t)->tv_sec = (t)->tv_usec = 0)
38 #define timercmp(s,t,op) ((s)->tv_sec == (t)->tv_sec ? \
39 (s)->tv_usec op (t)->tv_usec : (s)->tv_sec op (t)->tv_sec)
40 #define timeradd(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec + (t)->tv_sec, \
41 ((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 && \
42 ((a)->tv_usec -= 1000000, (a)->tv_sec++) )
43 #define timersub(s,t,a) (void) ( (a)->tv_sec = (s)->tv_sec - (t)->tv_sec, \
44 ((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 && \
45 ((a)->tv_usec += 1000000, (a)->tv_sec--) )
48 #if defined(_GNU_SOURCE)
49 #define TIMEVAL_TO_TIMESPEC(tv, ts) ( \
50 (ts)->tv_sec = (tv)->tv_sec, \
51 (ts)->tv_nsec = (tv)->tv_usec * 1000, \
53 #define TIMESPEC_TO_TIMEVAL(tv, ts) ( \
54 (tv)->tv_sec = (ts)->tv_sec, \
55 (tv)->tv_usec = (ts)->tv_nsec / 1000, \