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ravi/mir/real-time.h

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/* This file is a part of MIR project.
Copyright (C) 2018-2021 Vladimir Makarov <vmakarov.gcc@gmail.com> and logzero <core13@gmx.net>
*/
#ifndef _WIN32
#include <sys/time.h>
static double __attribute__ ((unused)) real_sec_time (void) {
struct timeval tv;
gettimeofday (&tv, NULL);
return tv.tv_usec / 1000000.0 + tv.tv_sec;
}
static double __attribute__ ((unused)) real_usec_time (void) {
struct timeval tv;
gettimeofday (&tv, NULL);
return tv.tv_usec + tv.tv_sec * 1000000.0;
}
#else
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
// does not return actual time, use as a stopwatch only
static double real_sec_time (void) {
LARGE_INTEGER freq, count;
if (QueryPerformanceFrequency (&freq) && QueryPerformanceCounter (&count))
return (double) count.QuadPart / (double) freq.QuadPart;
return 0.0;
}
static double real_usec_time (void) {
LARGE_INTEGER freq, count;
if (QueryPerformanceFrequency (&freq) && QueryPerformanceCounter (&count))
return (double) count.QuadPart / ((double) freq.QuadPart * 1.0E-6);
return 0.0;
}
#endif