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         update();
   9 }
  10
  11 Timer::~Timer()
  12 {
  13 }
  14
  15 int Timer::update()
  16 {
  17         gettimeofday(&current_time, 0);
  18         return 0;
  19 }
  20
  21 int64_t Timer::get_difference(struct timeval *result)
  22 {
  23         gettimeofday(&new_time, 0);
  24
  25         result->tv_usec = new_time.tv_usec - current_time.tv_usec;
  26         result->tv_sec = new_time.tv_sec - current_time.tv_sec;
  27         if(result->tv_usec < 0)
  28         {
  29                 result->tv_usec += 1000000;
  30                 result->tv_sec--;
  31         }
  32
  33         return (int64_t)result->tv_sec * 1000 + (int64_t)result->tv_usec / 1000;
  34 }
  35
  36 int64_t Timer::get_difference()
  37 {
  38         gettimeofday(&new_time, 0);
  39
  40         new_time.tv_usec -= current_time.tv_usec;
  41         new_time.tv_sec -= current_time.tv_sec;
  42         if(new_time.tv_usec < 0)
  43         {
  44                 new_time.tv_usec += 1000000;
  45                 new_time.tv_sec--;
  46         }
  47
  48         return (int64_t)new_time.tv_sec * 1000 +
  49                 (int64_t)new_time.tv_usec / 1000;
  50 }
  51
  52 int64_t Timer::get_scaled_difference(long denominator)
  53 {
  54         get_difference(&new_time);
  55         return (int64_t)new_time.tv_sec * denominator +
  56                 (int64_t)((double)new_time.tv_usec / 1000000 * denominator);
  57 }
  58
  59 int Timer::delay(long milliseconds)
  60 {
  61         struct timeval delay_duration;
  62         delay_duration.tv_sec = 0;
  63         delay_duration.tv_usec = milliseconds * 1000;
  64         select(0,  NULL,  NULL, NULL, &delay_duration);
  65         return 0;
  66 }