void CancelJob()
{
	// Singlethreaded version. (non-blocking operation)
	// Below example is one of the simplest ways to achive non-blocking operations with Job in a
	// single-threaded environment. A finer-grained operation would involve handling of return
	// codes. (e.g. using Job<int>)
	
	Job<void> job;
	auto work = [=] {
		if(IsJobCancelled()) {
			Cout() << "Worker #" << GetWorkerId() << " received cancel signal. Cancelling job...\n";
			throw JobError("Operation cancelled.");
		}
	};
	
	Cout() << "Worker #" << GetWorkerId() << " started. (Waiting the cancellation signal...)\n";
	const int timeout = 5000;
	auto start_time = msecs();
	while(!job.IsError()) {
		job.Start(work);
		if(msecs(start_time) >= timeout)
			job.Cancel();	// Or if you have more than one non-blocking operation in progress,
		                  	// you can call CancelJobs() global function to cancel all running jobs.
	}
}