// =========================
private void TimeoutWorksTest(LevelingQueue <int> queue)
{
Barrier bar = new Barrier(2);
int takeResult = 0;
int peekResult = 0;
int addResult = 0;
Task task = Task.Run(() =>
{
bar.SignalAndWait();
int item = 0;
AtomicSet(ref takeResult, queue.TryTake(out item, 100));
AtomicSet(ref peekResult, queue.TryPeek(out item, 100));
while (queue.TryAdd(-1))
{
;
}
if (queue.IsBackgroundTransferingEnabled)
{
queue.AddForcedToHighLevelQueue(-1);
queue.AddForced(-1); // To prevent background transferer from freeing the space
}
AtomicSet(ref addResult, queue.TryAdd(100, 100));
});
bar.SignalAndWait();
TimingAssert.AreEqual(10000, 2, () => Volatile.Read(ref takeResult), "take");
TimingAssert.AreEqual(10000, 2, () => Volatile.Read(ref peekResult), "peek");
TimingAssert.AreEqual(10000, 2, () => Volatile.Read(ref addResult), "Add");
task.Wait();
}
// ===============
private void AddTakeTest(LevelingQueue <int> queue, int bound)
{
Assert.AreEqual(bound, queue.BoundedCapacity);
Assert.AreEqual(0, queue.Count);
Assert.IsTrue(queue.IsEmpty);
queue.Add(-1);
Assert.AreEqual(1, queue.Count);
Assert.IsFalse(queue.IsEmpty);
int peekVal = queue.Peek();
Assert.AreEqual(-1, peekVal);
Assert.AreEqual(1, queue.Count);
Assert.IsFalse(queue.IsEmpty);
int takeVal = queue.Take();
Assert.AreEqual(-1, takeVal);
Assert.AreEqual(0, queue.Count);
Assert.IsTrue(queue.IsEmpty);
int itemCount = 1;
while (queue.TryAdd(itemCount))
{
itemCount++;
}
itemCount--;
Assert.AreEqual(itemCount, queue.Count);
Assert.IsFalse(queue.IsEmpty);
queue.AddForced(++itemCount);
Assert.AreEqual(itemCount, queue.Count);
List <int> takenItems = new List <int>();
while (queue.TryTake(out takeVal))
{
takenItems.Add(takeVal);
Assert.AreEqual(itemCount - takenItems.Count, queue.Count);
}
Assert.AreEqual(itemCount, takenItems.Count, "count diff");
Assert.IsTrue(queue.IsEmpty);
if (queue.AddingMode != LevelingQueueAddingMode.PreserveOrder)
{
takenItems.Sort();
}
for (int i = 0; i < takenItems.Count; i++)
{
Assert.AreEqual(i + 1, takenItems[i]);
}
}
// ==========================
private void RunComplexTest(LevelingQueue <int> q, int elemCount, int thCount)
{
int atomicRandom = 0;
int trackElemCount = elemCount;
int addFinished = 0;
Thread[] threadsTake = new Thread[thCount];
Thread[] threadsAdd = new Thread[thCount];
CancellationTokenSource tokSrc = new CancellationTokenSource();
List <int> global = new List <int>(elemCount);
Action addAction = () =>
{
Random rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * thCount * 2);
while (true)
{
int item = Interlocked.Decrement(ref trackElemCount);
if (item < 0)
{
break;
}
if (rnd.Next(100) == 0)
{
q.AddForced(item);
}
else
{
q.Add(item);
}
int sleepTime = rnd.Next(12);
int tmpItem = 0;
if (q.TryPeek(out tmpItem) && tmpItem == item)
{
sleepTime += 12;
}
if (sleepTime > 0)
{
SpinWaitHelper.SpinWait(sleepTime);
}
}
Interlocked.Increment(ref addFinished);
};
Action takeAction = () =>
{
Random rnd = new Random(Environment.TickCount + Interlocked.Increment(ref atomicRandom) * thCount * 2);
List <int> data = new List <int>();
try
{
while (Volatile.Read(ref addFinished) < thCount)
{
int tmp = 0;
if (q.TryTake(out tmp, -1, tokSrc.Token))
{
data.Add((int)tmp);
}
int sleepTime = rnd.Next(12);
if (sleepTime > 0)
{
SpinWaitHelper.SpinWait(sleepTime);
}
}
}
catch (OperationCanceledException) { }
int tmp2;
while (q.TryTake(out tmp2))
{
data.Add((int)tmp2);
}
lock (global)
global.AddRange(data);
};
for (int i = 0; i < threadsTake.Length; i++)
{
threadsTake[i] = new Thread(new ThreadStart(takeAction));
}
for (int i = 0; i < threadsAdd.Length; i++)
{
threadsAdd[i] = new Thread(new ThreadStart(addAction));
}
for (int i = 0; i < threadsTake.Length; i++)
{
threadsTake[i].Start();
}
for (int i = 0; i < threadsAdd.Length; i++)
{
threadsAdd[i].Start();
}
for (int i = 0; i < threadsAdd.Length; i++)
{
threadsAdd[i].Join();
}
tokSrc.Cancel();
for (int i = 0; i < threadsTake.Length; i++)
{
threadsTake[i].Join();
}
Assert.AreEqual(elemCount, global.Count);
global.Sort();
for (int i = 0; i < elemCount; i++)
{
Assert.AreEqual(i, global[i]);
}
}
// ==========================
private void PreserveOrderTest(LevelingQueue <int> queue, int elemCount)
{
Barrier bar = new Barrier(2);
CancellationTokenSource cancelled = new CancellationTokenSource();
List <int> takenElems = new List <int>(elemCount + 1);
Action addAction = () =>
{
int curElem = 0;
Random rnd = new Random(Environment.TickCount + Thread.CurrentThread.ManagedThreadId);
bar.SignalAndWait();
while (curElem < elemCount)
{
if (rnd.Next(100) == 0)
{
queue.AddForced(curElem);
}
else
{
queue.Add(curElem);
}
if (rnd.Next(100) == 0)
{
Thread.Yield();
}
SpinWaitHelper.SpinWait(rnd.Next(12));
curElem++;
}
cancelled.Cancel();
};
StringBuilder badInfo = new StringBuilder();
Action takeAction = () =>
{
Random rnd = new Random(Environment.TickCount + Thread.CurrentThread.ManagedThreadId);
bar.SignalAndWait();
try
{
while (!cancelled.IsCancellationRequested)
{
takenElems.Add(queue.Take(cancelled.Token));
//if (takenElems[takenElems.Count - 1] != takenElems.Count - 1)
// badInfo.Append("Is taken from high = " + queue.LastTakeTop.ToString());
if (rnd.Next(100) == 0)
{
Thread.Yield();
}
SpinWaitHelper.SpinWait(rnd.Next(12));
}
}
catch (OperationCanceledException) { }
int item = 0;
while (queue.TryTake(out item))
{
takenElems.Add(item);
}
};
var sw = System.Diagnostics.Stopwatch.StartNew();
Task addTask = Task.Factory.StartNew(addAction, TaskCreationOptions.LongRunning);
Task takeTask = Task.Factory.StartNew(takeAction, TaskCreationOptions.LongRunning);
Task.WaitAll(addTask, takeTask);
Assert.AreEqual(elemCount, takenElems.Count);
for (int i = 0; i < takenElems.Count; i++)
{
if (i != takenElems[i])
{
Assert.AreEqual(i, takenElems[i], $"i != takenElems[i], nextItem = {takenElems[i + 1]}, badInfo = '{badInfo}'");
}
}
}
// =========================
private void CancellationWorksTest(LevelingQueue <int> queue)
{
Barrier bar = new Barrier(2);
CancellationTokenSource takeSource = new CancellationTokenSource();
int takeResult = 0;
CancellationTokenSource peekSource = new CancellationTokenSource();
int peekResult = 0;
CancellationTokenSource addSource = new CancellationTokenSource();
int addResult = 0;
Task task = Task.Run(() =>
{
bar.SignalAndWait();
int item = 0;
try
{
AtomicSet(ref takeResult, queue.TryTake(out item, 60000, takeSource.Token));
}
catch (OperationCanceledException)
{
Interlocked.Exchange(ref takeResult, 3);
}
try
{
AtomicSet(ref peekResult, queue.TryPeek(out item, 60000, peekSource.Token));
}
catch (OperationCanceledException)
{
Interlocked.Exchange(ref peekResult, 3);
}
while (queue.TryAdd(-1))
{
;
}
if (queue.IsBackgroundTransferingEnabled)
{
queue.AddForced(-1);
}
try
{
AtomicSet(ref addResult, queue.TryAdd(100, 60000, addSource.Token));
}
catch (OperationCanceledException)
{
Interlocked.Exchange(ref addResult, 3);
}
});
bar.SignalAndWait();
Thread.Sleep(10);
Assert.AreEqual(0, takeResult);
takeSource.Cancel();
TimingAssert.AreEqual(10000, 3, () => Volatile.Read(ref takeResult));
Thread.Sleep(10);
Assert.AreEqual(0, peekResult);
peekSource.Cancel();
TimingAssert.AreEqual(10000, 3, () => Volatile.Read(ref peekResult));
Thread.Sleep(10);
Assert.AreEqual(0, addResult);
addSource.Cancel();
TimingAssert.AreEqual(10000, 3, () => Volatile.Read(ref addResult));
task.Wait();
}
