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#ifndef _SYS_TIME_H #define _SYS_TIME_H #ifdef __cplusplus extern "C" { #endif #include <sys/select.h> int gettimeofday (struct timeval *, void *); #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) #define ITIMER_REAL 0 #define ITIMER_VIRTUAL 1 #define ITIMER_PROF 2 struct itimerval { struct timeval it_interval; struct timeval it_value; }; int getitimer (int, struct itimerval *); int setitimer (int, const struct itimerval *, struct itimerval *); int utimes (const char *, const struct timeval [2]); #endif #ifdef _GNU_SOURCE int settimeofday (const struct timeval *, void *); int adjtime (const struct timeval *, struct timeval *); struct timezone { int tz_minuteswest; int tz_dsttime; }; #define timerisset(t) ((t)->tv_sec || (t)->tv_usec) #define timerclear(t) ((t)->tv_sec = (t)->tv_usec = 0) #define timercmp(s,t,op) ((s)->tv_sec == (t)->tv_sec ? \ (s)->tv_usec op (t)->tv_usec : (s)->tv_sec op (t)->tv_sec) #define timeradd(s,t,a) ( (a)->tv_sec = (s)->tv_sec + (t)->tv_sec, \ ((a)->tv_usec = (s)->tv_usec + (t)->tv_usec) >= 1000000 && \ ((a)->tv_usec -= 1000000, (a)->tv_sec++) ) #define timersub(s,t,a) ( (a)->tv_sec = (s)->tv_sec - (t)->tv_sec, \ ((a)->tv_usec = (s)->tv_usec - (t)->tv_usec) < 0 && \ ((a)->tv_usec += 1000000, (a)->tv_sec--) ) #endif #ifdef __cplusplus } #endif #endif |