static void worker(EventSignaller signal, CountdownEvent countdown, int workerNumber)
{
print($"Worker {workerNumber} is waiting for signal.");
signal.Wait();
int delay = randomDelayMilliseconds();
print($"Worker {workerNumber} got signal, now sleeping for {delay}");
Thread.Sleep(delay);
print($"Worker {workerNumber} finished work.");
countdown.Signal();
}
static void Main()
{
print("Main thread is starting the workers.");
int numWorkers = 10;
var signal = new EventSignaller();
var countdown = new CountdownEvent(numWorkers);
for (int i = 0; i < numWorkers; ++i)
{
int n = i; // Prevent modified closure.
Task.Run(() => worker(signal, countdown, n));
}
print("Main thread is waiting for a five seconds.");
Thread.Sleep(5000);
print("Main thread is signalling all the workers to start.");
signal.Signal();
print("Main thread is waiting for all the workers to finish.");
countdown.Wait();
print("Main thread finished waiting for all the workers to complete.");
}
