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#ifndef TIMING_H
#define TIMING_H
#ifdef __CYGWIN__
# ifndef _POSIX_MONOTONIC_CLOCK
# define _POSIX_MONOTONIC_CLOCK
// this modifies <time.h>
# endif
// in case someone included <time.h> before we got here (this is lifted from time.h>)
# ifndef CLOCK_MONOTONIC
# define CLOCK_MONOTONIC (clockid_t)4
# endif
#endif
#include <time.h>
#include <sys/time.h>
#include "clock_gettime_stub.c"
struct Timer {
Timer() { Reset(); }
void Reset()
{
clock_gettime(CLOCK_MONOTONIC, &start_t);
}
double Elapsed() const {
timespec end_t;
clock_gettime(CLOCK_MONOTONIC, &end_t);
const double elapsed = (end_t.tv_sec - start_t.tv_sec)
+ (end_t.tv_nsec - start_t.tv_nsec) / 1000000000.0;
return elapsed;
}
private:
timespec start_t;
};
#endif
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