public void TestHuge()
{
using (var b = new ThreadSafeWriteQueue(1024))
{
var pos = b.Allocate(1024 - 2);
b.Commit(pos);
var a = b.ReadMessage();
Assert.AreEqual(pos, a);
Assert.AreEqual(-1, b.ReadMessage());
pos = b.Allocate(1024 - 2);
b.Commit(pos);
a = b.ReadMessage();
Assert.AreEqual(pos, a);
Assert.AreEqual(-1, b.ReadMessage());
Assert.Throws<OverflowException>(() => b.Allocate(1024 - 1));
}
}
public void TestMultiThreading()
{
var threads = new Thread[4];
int messageLength = 2;
int maxNumMessages = 1024 * 1024 - 1;
using (ThreadSafeWriteQueue b = new ThreadSafeWriteQueue(threads.Length * messageLength * maxNumMessages))
{
using (Semaphore semaphore = new Semaphore(0, threads.Length))
{
var messagesPerThread = maxNumMessages;
for (int index = 0; index < threads.Length; index++)
{
var thread = threads[index] = new Thread(this.WriteProc);
thread.Start(new Context { Buffer = b, Semaphore = semaphore, Count = messagesPerThread, Id = index });
}
semaphore.Release(threads.Length);
var t1 = DateTime.Now;
foreach (var thread in threads)
{
thread.Join();
}
var t2 = DateTime.Now;
Console.WriteLine(
"{0} sec ({1} per sec)",
t2.Subtract(t1).TotalSeconds,
messagesPerThread * threads.Length / t2.Subtract(t1).TotalSeconds);
int count = 0;
int[] countsPerThread = new int[threads.Length];
int pos;
while ((pos = b.ReadMessage()) >= 0)
{
++countsPerThread[b.ReadInt32(pos)];
++count;
}
for (int index = 0; index < countsPerThread.Length; index++)
{
Console.WriteLine("Thread {0} sent {1} messages", index, countsPerThread[index]);
}
Assert.AreEqual(messagesPerThread * threads.Length, count);
}
}
}
public void TestSafeRead()
{
using (var b = new ThreadSafeWriteQueue(8))
{
b.Commit(b.Allocate(2));
b.Commit(b.Allocate(2));
b.ReadMessage();
Assert.Throws<OverflowException>(() => b.Allocate(2));
b.ReadMessage();
b.Commit(b.Allocate(2));
}
}