osdep/timer-linux.c

   1 // Precise timer routines for LINUX  (C) LGB & A'rpi/ASTRAL
   2
   3 #include <unistd.h>
   4 #ifdef __BEOS__
   5 #define usleep(t) snooze(t)
   6 #endif
   7 #include <stdlib.h>
   8 #include <time.h>
   9 #include <sys/time.h>
  10 #include "config.h"
  11 #include "timer.h"
  12
  13 const char timer_name[] =
  14 #ifdef HAVE_NANOSLEEP
  15   "nanosleep()";
  16 #else
  17   "usleep()";
  18 #endif
  19
  20 int usec_sleep(int usec_delay)
  21 {
  22 #ifdef HAVE_NANOSLEEP
  23     struct timespec ts;
  24     ts.tv_sec  =  usec_delay / 1000000;
  25     ts.tv_nsec = (usec_delay % 1000000) * 1000;
  26     return nanosleep(&ts, NULL);
  27 #else
  28     return usleep(usec_delay);
  29 #endif
  30 }
  31
  32 // Returns current time in microseconds
  33 unsigned int GetTimer(void){
  34   struct timeval tv;
  35   gettimeofday(&tv,NULL);
  36   return tv.tv_sec * 1000000 + tv.tv_usec;
  37 }
  38
  39 // Returns current time in milliseconds
  40 unsigned int GetTimerMS(void){
  41   struct timeval tv;
  42   gettimeofday(&tv,NULL);
  43   return tv.tv_sec * 1000 + tv.tv_usec / 1000;
  44 }
  45
  46 // Initialize timer, must be called at least once at start
  47 void InitTimer(void){
  48 }