time.h

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/* time.h -- An implementation of the standard Unix <sys/time.h> file.
   Written by Geoffrey Noer <[e-mail]>
   Public domain; no rights reserved. */

#ifndef _SYS_TIME_H_
#define _SYS_TIME_H_

#include <_ansi.h>
#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _WINSOCK_H
struct timeval {
  long tv_sec;
  long tv_usec;
};

struct timezone {
  int tz_minuteswest;
  int tz_dsttime;
};

#ifdef __CYGWIN__
#include <sys/select.h>
#endif /* __CYGWIN__ */

#endif /* _WINSOCK_H */

#define ITIMER_REAL     0
#define ITIMER_VIRTUAL  1
#define ITIMER_PROF     2

struct  itimerval {
  struct  timeval it_interval;
  struct  timeval it_value;
};

/* BSD time macros used by RTEMS code */
#if defined (__rtems__) || defined (__CYGWIN__)

/* Convenience macros for operations on timevals.
   NOTE: `timercmp' does not work for >= or <=.  */
#define	timerisset(tvp)		((tvp)->tv_sec || (tvp)->tv_usec)
#define	timerclear(tvp)		((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define	timercmp(a, b, CMP) 						      \
  (((a)->tv_sec == (b)->tv_sec) ? 					      \
   ((a)->tv_usec CMP (b)->tv_usec) : 					      \
   ((a)->tv_sec CMP (b)->tv_sec))
#define	timeradd(a, b, result)						      \
  do {									      \
    (result)->tv_sec = (a)->tv_sec + (b)->tv_sec;			      \
    (result)->tv_usec = (a)->tv_usec + (b)->tv_usec;			      \
    if ((result)->tv_usec >= 1000000)					      \
      {									      \
	++(result)->tv_sec;						      \
	(result)->tv_usec -= 1000000;					      \
      }									      \
  } while (0)
#define	timersub(a, b, result)						      \
  do {									      \
    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;			      \
    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;			      \
    if ((result)->tv_usec < 0) {					      \
      --(result)->tv_sec;						      \
      (result)->tv_usec += 1000000;					      \
    }									      \
  } while (0)
#endif /* defined (__rtems__) || defined (__CYGWIN__) */

int _EXFUN(gettimeofday, (struct timeval *__p, struct timezone *__z));
int _EXFUN(settimeofday, (const struct timeval *, const struct timezone *));
int _EXFUN(utimes, (const char *__path, struct timeval *__tvp));
int _EXFUN(getitimer, (int __which, struct itimerval *__value));
int _EXFUN(setitimer, (int __which, const struct itimerval *__value,
					struct itimerval *__ovalue));

#ifdef __cplusplus
}
#endif
#endif /* _SYS_TIME_H_ */