timer.h

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#pragma once
 
#include <arch/platform.h>
 
#include <stdint.h>
#include <time.h>
 
typedef uint_fast64_t timer_uint;
 
#ifdef __POSIX
#include <sys/time.h>
 
inline timer_uint timer_new(void)
{
        struct timeval tmptv;
        gettimeofday(&tmptv, NULL);
        return (timer_uint) tmptv.tv_sec * 1000000U + tmptv.tv_usec;
}
 
inline timer_uint timer_value(timer_uint start)
{
        return timer_new() - start;
}
 
#endif
 
#ifdef __WINDOWS
#include <windows.h>
 
extern timer_uint timer_perf_freq;
 
inline timer_uint timer_new(void)
{
        LARGE_INTEGER __start_time;
        QueryPerformanceCounter(&__start_time);
        return (timer_uint)__start_time.QuadPart;
}
 
 
inline timer_uint timer_value(timer_uint start)
{
        if (unlikely(timer_perf_freq == 0)) {
                LARGE_INTEGER __perf;
                QueryPerformanceFrequency(&__perf);
                timer_perf_freq = __perf.QuadPart;
        }
        return (timer_new() - start) / timer_perf_freq;
}
 
#endif