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(){
  11   return timeGetTime() * 1000;
  12 }
  13
  14 // Returns current time in milliseconds
  15 unsigned int GetTimerMS(){
  16   return timeGetTime() ;
  17 }
  18
  19 int usec_sleep(int usec_delay){
  20   // Sleep(0) won't sleep for one clocktick as the unix usleep
  21   // instead it will only make the thread ready
  22   // it may take some time until it actually starts to run again
  23   if(usec_delay<1000)usec_delay=1000;
  24   Sleep( usec_delay/1000);
  25   return 0;
  26 }
  27
  28 static DWORD RelativeTime = 0;
  29
  30 float GetRelativeTime(){
  31   DWORD t, r;
  32   t = GetTimer();
  33   r = t - RelativeTime;
  34   RelativeTime = t;
  35   return (float) r *0.000001F;
  36 }
  37
  38 void InitTimer(){
  39   GetRelativeTime();
  40 }