guicast/bctimer.C

   1 #include "bctimer.h"
   2 #include <sys/time.h>
   3 #include <sys/types.h>
   4 #include <unistd.h>
   5
   6 Timer::Timer()
   7 {
   8 }
   9
  10 Timer::~Timer()
  11 {
  12 }
  13
  14 int Timer::update()
  15 {
  16         gettimeofday(&current_time, 0);
  17         return 0;
  18 }
  19
  20 int64_t Timer::get_difference(struct timeval *result)
  21 {
  22         gettimeofday(&new_time, 0);
  23
  24         result->tv_usec = new_time.tv_usec - current_time.tv_usec;
  25         result->tv_sec = new_time.tv_sec - current_time.tv_sec;
  26         if(result->tv_usec < 0)
  27         {
  28                 result->tv_usec += 1000000;
  29                 result->tv_sec--;
  30         }
  31
  32         return (int64_t)result->tv_sec * 1000 + (int64_t)result->tv_usec / 1000;
  33 }
  34
  35 int64_t Timer::get_difference()
  36 {
  37         gettimeofday(&new_time, 0);
  38
  39         new_time.tv_usec -= current_time.tv_usec;
  40         new_time.tv_sec -= current_time.tv_sec;
  41         if(new_time.tv_usec < 0)
  42         {
  43                 new_time.tv_usec += 1000000;
  44                 new_time.tv_sec--;
  45         }
  46
  47         return (int64_t)new_time.tv_sec * 1000 +
  48                 (int64_t)new_time.tv_usec / 1000;
  49 }
  50
  51 int64_t Timer::get_scaled_difference(long denominator)
  52 {
  53         get_difference(&new_time);
  54         return (int64_t)new_time.tv_sec * denominator +
  55                 (int64_t)((double)new_time.tv_usec / 1000000 * denominator);
  56 }
  57
  58 int Timer::delay(long milliseconds)
  59 {
  60         struct timeval delay_duration;
  61         delay_duration.tv_sec = 0;
  62         delay_duration.tv_usec = milliseconds * 1000;
  63         select(0,  NULL,  NULL, NULL, &delay_duration);
  64         return 0;
  65 }