The source file for the ThreadPreemptionCounter.

ThreadPreemption.c

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

#define MAX(X, Y) (((X) < (Y)) ? (Y) : (X))

int main() {

	ULONGLONG ta = GetTickCount64();
	ULONGLONG maximumDuration = 0;

	for (int i = 0; i < 10 * 1000 * 1000; i++) {
		ULONGLONG tb = GetTickCount64();
		ULONGLONG duration = tb - ta;
		maximumDuration = MAX(maximumDuration, duration);
	}

	printf("%llu\n", maximumDuration);
	return 0;
}