public void RacingClears()
{
int cores = CoreCount();
if (cores < 2)
{
cores = 2;
}
var threads = new Thread[cores];
var queue = new SlimConcurrentQueue <int>();
int done = 0;
threads[0] = new Thread(() =>
{
for (int x = 0; x != 1000000; ++x)
{
queue.Enqueue(x);
}
Interlocked.Increment(ref done);
});
for (int i = 1; i != cores; ++i)
{
threads[i] = new Thread(() =>
{
while (done == 0)
{
for (int x = 0; x != 1000; ++x)
{
queue.Clear();
}
}
});
}
for (int i = 0; i < cores; ++i)
{
threads[i].Start();
}
for (int i = 0; i < cores; ++i)
{
threads[i].Join();
}
Assert.IsTrue(queue.IsEmpty);
}
public void HalfDequeue()
{
int cores = CoreCount();
if (cores < 2)
{
cores = 2;
}
var threads = new Thread[cores];
var queue = new SlimConcurrentQueue <int>();
var secQueue = new TrackedConcurrentQueue <int>();
for (int i = 0; i != cores; ++i)
{
if (i % 2 == 0)
{
threads[i] = new Thread(obj =>
{
int off = (int)obj;
for (int x = 0; x != 100000; ++x)
{
queue.Enqueue(x * cores + off);
}
});
}
else
{
threads[i] = new Thread(obj =>
{
foreach (int taken in queue.DequeueAll())
{
secQueue.Enqueue(taken);
}
});
}
}
for (int i = 0; i < cores; i += 2)
{
threads[i].Start(i);
}
for (int i = 1; i < cores; i += 2)
{
threads[i].Start(i);
}
for (int i = 0; i != cores; ++i)
{
threads[i].Join();
}
Dictionary <int, int> dict = new Dictionary <int, int>();
for (int i = 0; i != cores; ++i)
{
dict[i] = -1;
}
secQueue.EnqueueRange(queue);
foreach (int test in secQueue)
{
int bucket = test % cores;
int last = dict[bucket];
Assert.IsTrue(test > last);
dict[bucket] = last;
}
}