WFMO Timeout Tester

#include <iostream>
using namespace std;
#include <windows.h>

__int64 getSystemTimeMicroseconds() {
    LARGE_INTEGER ticks;
    QueryPerformanceCounter(&ticks);
    return *(__int64*)&ticks;
}

int main() {
	HANDLE event = CreateEvent(NULL, FALSE, FALSE, NULL);

	const int numTrials = 100;

	__int64 microsecondsLateSum = 0;

	for (int i = 0; i < numTrials; i++) {
		__int64 timeBeforeWaitMicroseconds = getSystemTimeMicroseconds();
		__int64 desiredWaitMicroseconds = rand() * 1337 % 2600000 + 400000;
		__int64 desiredTimeAfterWaitMicroseconds = timeBeforeWaitMicroseconds + desiredWaitMicroseconds;
		WaitForMultipleObjects(1, &event, false, desiredWaitMicroseconds / 1000);
		__int64 timeAfterWaitMicroseconds = getSystemTimeMicroseconds();

		__int64 microsecondsLate = timeAfterWaitMicroseconds - desiredTimeAfterWaitMicroseconds;

		std::cout << "from " << timeBeforeWaitMicroseconds << " desired wait of " << desiredWaitMicroseconds << " to desired end time of " << desiredTimeAfterWaitMicroseconds << " actually ended " << timeAfterWaitMicroseconds << " late by " << microsecondsLate << " microseconds" << std::endl;
		microsecondsLateSum += microsecondsLate;
	}

	std::cout << "late by on average " << microsecondsLateSum / numTrials << " microseconds" << std::endl;

	return 0;
}