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//https://github.com/zuqqhi2/numerical_simulation/blob/master/multithread/laytrace/timer.h
#ifndef TIMER_H_
#define TIMER_H_
#include <stdio.h>
#include <sys/time.h>
static inline
unsigned long long gettimeval(void) {
struct timeval tv;
struct timezone tz;
gettimeofday(&tv, &tz);
return ((unsigned long long)tv.tv_sec)*1000000+tv.tv_usec;
}
static inline
void start_timer(unsigned long long *startt) {
*startt = gettimeval();
return;
}
static inline
unsigned long long stop_timer(unsigned long long *startt) {
unsigned long long stopt = gettimeval();
return (stopt>=*startt)?(stopt-*startt):(stopt);
}
#define print_timer(te) {printf("time of %s:%f[sec]\n", #te, (te*1.0e-3)/1000);}
#endif
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