1#ifndef _SYS_TIME_H 2#define _SYS_TIME_H 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#define ITIMER_REAL 0 14#define ITIMER_VIRTUAL 1 15#define ITIMER_PROF 2 16 17struct itimerval { 18 struct timeval it_interval; 19 struct timeval it_value; 20}; 21 22int getitimer (int, struct itimerval *); 23int setitimer (int, const struct itimerval *__restrict, struct itimerval *__restrict); 24int utimes (const char *, const struct timeval [2]); 25 26#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) 27struct timezone { 28 int tz_minuteswest; 29 int tz_dsttime; 30}; 31int futimes(int, const struct timeval [2]); 32int futimesat(int, const char *, const struct timeval [2]); 33int lutimes(const char *, const struct timeval [2]); 34int settimeofday(const struct timeval *, const struct timezone *); 35int 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