WaitableTimerTest1

main.cpp

#include <Windows.h>
#include <stdio.h>
#include <assert.h>

#define NANOSECONDS_PER_SECOND ( 1000000000LL )
#define NANOSECONDS_PER_TIMER ( 100LL )

int main()
{
    LARGE_INTEGER begin;
    LARGE_INTEGER end;
    LARGE_INTEGER timeToWait;
    
    HANDLE timer = CreateWaitableTimer(NULL, TRUE, NULL);
    assert(timer != NULL);

    timeToWait.QuadPart = -10000LL; //10000 * 100 nanoseconds = 1 ms

    assert(QueryPerformanceCounter(&begin));
    assert(SetWaitableTimer(timer, &timeToWait, 0, NULL, NULL, TRUE));
    assert(WaitForSingleObject(timer, INFINITE) == WAIT_OBJECT_0);
    assert(QueryPerformanceCounter(&end));

    LARGE_INTEGER performanceCounterFrequency;//On my machine: 3312841, or 301.9 ns
    assert(QueryPerformanceFrequency(&performanceCounterFrequency));

    LONGLONG delta = end.QuadPart - begin.QuadPart;

    printf("begin:      %I64d\n", begin.QuadPart);
    printf("end:        %I64d\n", end.QuadPart);
    printf("delta:      %I64d ticks\n", delta);
    printf("delta:      %I64d ns\n", (delta * NANOSECONDS_PER_SECOND) / performanceCounterFrequency.QuadPart);
    printf("timeToWait: %I64d ns\n", -timeToWait.QuadPart * NANOSECONDS_PER_TIMER);
    printf("frequency : %I64d ticks/second\n", performanceCounterFrequency.QuadPart);

    printf("Press any key to exit...");
    getchar();
}