#ifndef _SYS_TIME_H_#define _SYS_TIME_H_#include <time.h>#ifdef __cplusplusextern "C" {#endif#ifndef _TIMEVAL_DEFINED /* also in winsock[2].h */#define _TIMEVAL_DEFINEDstruct timeval { long tv_sec; long tv_usec;};#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)#define timercmp(tvp, uvp, cmp) \ (((tvp)->tv_sec != (uvp)->tv_sec) ? \ ((tvp)->tv_sec cmp (uvp)->tv_sec) : \ ((tvp)->tv_usec cmp (uvp)->tv_usec))#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0#endif /* _TIMEVAL_DEFINED *//* Provided for compatibility with code that assumes that the presence of gettimeofday function implies a definition of struct timezone. */struct timezone{ int tz_minuteswest; /* of Greenwich */ int tz_dsttime; /* type of dst correction to apply */};/* Implementation as per: The Open Group Base Specifications, Issue 6 IEEE Std 1003.1, 2004 Edition The timezone pointer arg is ignored. Errors are ignored.*/ int __cdecl __MINGW_NOTHROW gettimeofday(struct timeval *__restrict__, void *__restrict__ /* tzp (unused) */);#ifdef __cplusplus}#endif#endif /* _SYS_TIME_H_ */