osdep/timer-win2.c

   1 // Precise timer routines for WINDOWS
   2
   3 #include <windows.h>
   4 #include <mmsystem.h>
   5 #include "timer.h"
   6
   7 const char *timer_name = "Windows native";
   8
   9 // Returns current time in microseconds
  10 unsigned int GetTimer(void)
  11 {
  12   return timeGetTime() * 1000;
  13 }
  14
  15 // Returns current time in milliseconds
  16 unsigned int GetTimerMS(void)
  17 {
  18   return timeGetTime() ;
  19 }
  20
  21 int usec_sleep(int usec_delay){
  22   // Sleep(0) won't sleep for one clocktick as the unix usleep
  23   // instead it will only make the thread ready
  24   // it may take some time until it actually starts to run again
  25   if(usec_delay<1000)usec_delay=1000;
  26   Sleep( usec_delay/1000);
  27   return 0;
  28 }
  29
  30 static DWORD RelativeTime = 0;
  31
  32 float GetRelativeTime(void)
  33 {
  34   DWORD t, r;
  35   t = GetTimer();
  36   r = t - RelativeTime;
  37   RelativeTime = t;
  38   return (float) r *0.000001F;
  39 }
  40
  41 void InitTimer(void)
  42 {
  43   GetRelativeTime();
  44 }