src/util/time.h

   1 #ifndef EL__UTIL_TIME_H
   2 #define EL__UTIL_TIME_H
   3
   4 #ifdef HAVE_SYS_TYPES_H
   5 #include <sys/types.h>
   6 #endif
   7 #ifdef HAVE_SYS_TIME_H
   8 #include <sys/time.h>
   9 #endif
  10 #ifdef HAVE_TIME_H
  11 #include <time.h>
  12 #endif
  13
  14 typedef long milliseconds_T;
  15 #define MILLISECONDS_MAX ((milliseconds_T) (LONG_MAX / 1000L))
  16 #define ms_max(a, b) ((a) < (b) ? (b) : (a))
  17 #define ms_min(a, b) ((a) < (b) ? (a) : (b))
  18
  19 /* Is using atol() in this way acceptable? It seems
  20  * non-portable to me; time_t might not be a long. -- Miciah */
  21 #define str_to_time_t(s) ((time_t) atol(s))
  22
  23 /* Redefine a timeval that has all fields signed so calculations
  24  * will be simplified on rare systems that define timeval with
  25  * unsigned fields. */
  26 typedef struct { long sec; long usec; } timeval_T;
  27
  28 timeval_T *timeval_from_milliseconds(timeval_T *t, milliseconds_T milliseconds);
  29 timeval_T *timeval_from_seconds(timeval_T *t, long seconds);
  30 timeval_T *timeval_from_double(timeval_T *t, double x);
  31
  32 milliseconds_T sec_to_ms(long sec);
  33 milliseconds_T add_ms_to_ms(milliseconds_T a, milliseconds_T b);
  34 milliseconds_T mult_ms(milliseconds_T a, long lb);
  35
  36 milliseconds_T timeval_to_milliseconds(timeval_T *t);
  37 long timeval_to_seconds(timeval_T *t);
  38
  39 int timeval_is_positive(timeval_T *t);
  40 void timeval_limit_to_zero_or_one(timeval_T *t);
  41 timeval_T *timeval_now(timeval_T *t);
  42 timeval_T *timeval_sub(timeval_T *res, timeval_T *older, timeval_T *newer);
  43 timeval_T *timeval_add(timeval_T *res, timeval_T *base, timeval_T *t);
  44 int timeval_cmp(timeval_T *t1, timeval_T *t2);
  45 timeval_T *timeval_sub_interval(timeval_T *t, timeval_T *interval);
  46 timeval_T *timeval_add_interval(timeval_T *t, timeval_T *interval);
  47 int timeval_div_off_t(off_t n, timeval_T *t);
  48
  49 #define timeval_copy(dst, src) copy_struct(dst, src)
  50
  51 #endif