src/util/time.h

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