qpc-test.c

#include <windows.h>
#include <stdio.h>

int main() {
  LARGE_INTEGER prev, next;
  BOOL r;
  QueryPerformanceCounter(&prev);
  for (;;) {
      r = QueryPerformanceCounter(&next);
      if (r == 0 || next.QuadPart < prev.QuadPart) {
        printf("%d %lld %lld\n", r, next.QuadPart, prev.QuadPart);
      }
      prev = next;
  }
}