1 #ifndef _SYS_TIME_H 2 #define _SYS_TIME_H 3 #ifdef __cplusplus 4 extern "C" { 5 #endif 6 7 #include <features.h> 8 9 #include <sys/select.h> 10 11 int gettimeofday (struct timeval *__restrict, void *__restrict); 12 13 #define ITIMER_REAL 0 14 #define ITIMER_VIRTUAL 1 15 #define ITIMER_PROF 2 16 17 struct itimerval { 18 struct timeval it_interval; 19 struct timeval it_value; 20 }; 21 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]); 25 26 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) 27 struct timezone { 28 int tz_minuteswest; 29 int tz_dsttime; 30 }; 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--) ) 46 #endif 47 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, \ 52 (void)0 ) 53 #define TIMESPEC_TO_TIMEVAL(tv, ts) ( \ 54 (tv)->tv_sec = (ts)->tv_sec, \ 55 (tv)->tv_usec = (ts)->tv_nsec / 1000, \ 56 (void)0 ) 57 #endif 58 59 #ifdef __cplusplus 60 } 61 #endif 62 #endif 63