include/sys/time.h

   1 /* time.h -- An implementation of the standard Unix <sys/time.h> file.
   2    Written by Geoffrey Noer <noer@cygnus.com>
   3    Public domain; no rights reserved. */
   4
   5 #ifndef _SYS_TIME_H_
   6 #define _SYS_TIME_H_
   7
   8 #include <_ansi.h>
   9 #include <sys/types.h>
  10
  11 #ifdef __cplusplus
  12 extern "C" {
  13 #endif
  14
  15 #ifndef _WINSOCK_H
  16 struct timeval {
  17   long tv_sec;
  18   long tv_usec;
  19 };
  20
  21 struct timezone {
  22   int tz_minuteswest;
  23   int tz_dsttime;
  24 };
  25
  26 #if defined(__CYGWIN__) || defined(__MSYS__)
  27 #include <sys/select.h>
  28 #endif /* __CYGWIN__ or __MSYS__ */
  29
  30 #endif /* _WINSOCK_H */
  31
  32 #define ITIMER_REAL     0
  33 #define ITIMER_VIRTUAL  1
  34 #define ITIMER_PROF     2
  35
  36 struct  itimerval {
  37   struct  timeval it_interval;
  38   struct  timeval it_value;
  39 };
  40
  41 /* BSD time macros used by RTEMS code */
  42 #if defined (__rtems__) || defined (__CYGWIN__) || defined (__MSYS__)
  43
  44 /* Convenience macros for operations on timevals.
  45    NOTE: `timercmp' does not work for >= or <=.  */
  46 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
  47 #define timerclear(tvp)         ((tvp)->tv_sec = (tvp)->tv_usec = 0)
  48 #define timercmp(a, b, CMP)                                                   \
  49   (((a)->tv_sec == (b)->tv_sec) ?                                             \
  50    ((a)->tv_usec CMP (b)->tv_usec) :                                          \
  51    ((a)->tv_sec CMP (b)->tv_sec))
  52 #define timeradd(a, b, result)                                                \
  53   do {                                                                        \
  54     (result)->tv_sec = (a)->tv_sec + (b)->tv_sec;                             \
  55     (result)->tv_usec = (a)->tv_usec + (b)->tv_usec;                          \
  56     if ((result)->tv_usec >= 1000000)                                         \
  57       {                                                                       \
  58         ++(result)->tv_sec;                                                   \
  59         (result)->tv_usec -= 1000000;                                         \
  60       }                                                                       \
  61   } while (0)
  62 #define timersub(a, b, result)                                                \
  63   do {                                                                        \
  64     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
  65     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
  66     if ((result)->tv_usec < 0) {                                              \
  67       --(result)->tv_sec;                                                     \
  68       (result)->tv_usec += 1000000;                                           \
  69     }                                                                         \
  70   } while (0)
  71 #endif /* defined (__rtems__) || defined (__CYGWIN__) || defined (__MSYS__) */
  72
  73 int _EXFUN(gettimeofday, (struct timeval *__p, struct timezone *__z));
  74 int _EXFUN(settimeofday, (const struct timeval *, const struct timezone *));
  75 int _EXFUN(utimes, (const char *__path, struct timeval *__tvp));
  76 int _EXFUN(getitimer, (int __which, struct itimerval *__value));
  77 int _EXFUN(setitimer, (int __which, const struct itimerval *__value,
  78                                         struct itimerval *__ovalue));
  79
  80 #ifdef __cplusplus
  81 }
  82 #endif
  83 #endif /* _SYS_TIME_H_ */