1#pragma once 2 3#ifdef __cplusplus 4extern "C" { 5#endif 6 7#include <features.h> 8 9#include <sys/select.h> 10 11int gettimeofday(struct timeval* __restrict, void* __restrict); 12 13#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE) 14 15#define ITIMER_REAL 0 16#define ITIMER_VIRTUAL 1 17#define ITIMER_PROF 2 18 19struct itimerval { 20 struct timeval it_interval; 21 struct timeval it_value; 22}; 23 24int getitimer(int, struct itimerval*); 25int setitimer(int, const struct itimerval* __restrict, struct itimerval* __restrict); 26int utimes(const char*, const struct timeval[2]); 27 28#endif 29 30#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) 31struct timezone { 32 int tz_minuteswest; 33 int tz_dsttime; 34}; 35int futimes(int, const struct timeval[2]); 36int futimesat(int, const char*, const struct timeval[2]); 37int lutimes(const char*, const struct timeval[2]); 38int settimeofday(const struct timeval*, const struct timezone*); 39int adjtime(const struct timeval*, struct timeval*); 40#define timerisset(t) ((t)->tv_sec || (t)->tv_usec) 41#define timerclear(t) ((t)->tv_sec = (t)->tv_usec = 0) 42#define timercmp(s, t, op) \ 43 ((s)->tv_sec == (t)->tv_sec ? (s)->tv_usec op(t)->tv_usec : (s)->tv_sec op(t)->tv_sec) 44#define timeradd(s, t, a) \ 45 (void)((a)->tv_sec = (s)->tv_sec + (t)->tv_sec, \ 46 ((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 && \ 47 ((a)->tv_usec -= 1000000, (a)->tv_sec++)) 48#define timersub(s, t, a) \ 49 (void)((a)->tv_sec = (s)->tv_sec - (t)->tv_sec, \ 50 ((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 && \ 51 ((a)->tv_usec += 1000000, (a)->tv_sec--)) 52#endif 53 54#if defined(_GNU_SOURCE) 55#define TIMEVAL_TO_TIMESPEC(tv, ts) \ 56 ((ts)->tv_sec = (tv)->tv_sec, (ts)->tv_nsec = (tv)->tv_usec * 1000, (void)0) 57#define TIMESPEC_TO_TIMEVAL(tv, ts) \ 58 ((tv)->tv_sec = (ts)->tv_sec, (tv)->tv_usec = (ts)->tv_nsec / 1000, (void)0) 59#endif 60 61#ifdef __cplusplus 62} 63#endif 64