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// Precise timer routines for LINUX (C) LGB & A'rpi/ASTRAL
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include "../config.h"
const char *timer_name =
#ifdef HAVE_NANOSLEEP
"nanosleep()";
#else
"usleep()";
#endif
int usec_sleep(int usec_delay)
{
#ifdef HAVE_NANOSLEEP
struct timespec ts;
ts.tv_sec = usec_delay / 1000000;
ts.tv_nsec = (usec_delay % 1000000) * 1000;
return nanosleep(&ts, NULL);
#else
return usleep(usec_delay);
#endif
}
// Returns current time in microseconds
unsigned int GetTimer(){
struct timeval tv;
struct timezone tz;
// float s;
gettimeofday(&tv,&tz);
// s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
return (tv.tv_sec*1000000+tv.tv_usec);
}
// Returns current time in milliseconds
unsigned int GetTimerMS(){
struct timeval tv;
struct timezone tz;
// float s;
gettimeofday(&tv,&tz);
// s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec;
return (tv.tv_sec*1000+tv.tv_usec/1000);
}
static unsigned int RelativeTime=0;
// Returns time spent between now and last call in seconds
float GetRelativeTime(){
unsigned int t,r;
t=GetTimer();
// t*=16;printf("time=%ud\n",t);
r=t-RelativeTime;
RelativeTime=t;
return (float)r * 0.000001F;
}
// Initialize timer, must be called at least once at start
void InitTimer(){
GetRelativeTime();
}
#if 0
void main(){
float t=0;
InitTimer();
while(1){ t+=GetRelativeTime();printf("time= %10.6f\r",t);fflush(stdout); }
}
#endif
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