// Each thread runs the dispatch loop.
private void DispatchLoop()
{
while (true)
{
var wi = default(WorkItem);
lock (m_queue)
{
// If shutdown was requested, exit the thread.
if (m_shutdown)
{
return;
}
// Find a new work item to execute.
while (m_queue.TryDequeue(out wi) == false)
{
m_threadsWaiting++;
try { Monitor.Wait(m_queue); }
finally { m_threadsWaiting--; }
// If we were signaled due to shutdown, exit the thread.
if (m_shutdown)
{
return;
}
}
// We found a work item! Grab it ...
}
// ...and Invoke it. Note: exceptions will go unhandled (and crash).
wi.Invoke();
}
}
public void LimitedSizeQueueLimitsTheSizeOfTheInternalQueue()
{
var q = new LimitedSizeQueue <int>(3);
Assert.AreEqual(0, q.Count);
Assert.AreEqual(3, q.Limit);
Assert.IsFalse(q.TryPeek(out _));
Assert.IsFalse(q.TryDequeue(out _));
Assert.IsTrue(q.TryEnqueue(1));
Assert.IsTrue(q.TryEnqueue(2));
Assert.IsTrue(q.TryEnqueue(3));
Assert.IsFalse(q.TryEnqueue(4));
Assert.IsFalse(q.TryEnqueue(5));
var items = string.Join(", ", q.Select(i => i.ToString()).ToArray());
Assert.AreEqual("1, 2, 3", items);
Assert.IsTrue(q.TryDequeue(out var item));
Assert.AreEqual(1, item);
Assert.IsTrue(q.TryEnqueue(6));
Assert.IsFalse(q.TryEnqueue(7));
Assert.IsTrue(q.TryDequeue(out item));
Assert.AreEqual(2, item);
Assert.IsTrue(q.TryDequeue(out item));
Assert.AreEqual(3, item);
Assert.IsTrue(q.TryPeek(out item));
Assert.AreEqual(6, item);
Assert.IsTrue(q.TryDequeue(out item));
Assert.AreEqual(6, item);
Assert.IsFalse(q.TryPeek(out _));
Assert.IsFalse(q.TryDequeue(out _));
}