Experiment with Waitable Timer

timer.c

#include <Windows.h>
#include <iostream>

std::ostream& printnow() {
	static ULONGLONG initial = 0;
	if (initial == 0) {
		initial = GetTickCount64();
		return std::cout << 0 << '\t';
	}
	else {
		return std::cout << (GetTickCount64() - initial) << '\t';
	}
}
static const DWORD TIMEOUT = 20000; // Give up after 20s
int main()
{
	printnow() << "Start" << std::endl;
	HANDLE timer = CreateWaitableTimer(NULL, false, NULL);
	if (timer) {
		int ticks = 10;
		LARGE_INTEGER due_time;
		due_time.QuadPart = (LONGLONG)-13 * (LONGLONG)10000000; // thirteen seconds into the future
		LONG period = 1000; // every second
		SetWaitableTimer(timer, &due_time, period, NULL, NULL, FALSE);
		while (ticks > 0) {
			int rc = WaitForSingleObject(timer, TIMEOUT);
			if (rc == WAIT_TIMEOUT) {
				std::cout << "Time out, give up" << std::endl;
				ticks = 0;
			}
			printnow() << "Fire " << ticks << std::endl;
			--ticks;
		}
		CloseHandle(timer);
	}
	printnow() << "End" << std::endl;
}