public void ReaderWriterLockTest()
{
const int iterations = 10000;
var resource = new List <int> {
1
};
var locker = new ReadWriteLock();
var concurrentWriterCounter = 0;
var startSignal = new ManualResetEvent(false);
int Read()
{
var random = new Random();
var count = 0;
startSignal.WaitOne();
for (var i = 0; i < iterations; i++)
{
using (locker.AcquireRead())
count += resource[random.Next(0, resource.Count)];
Thread.Sleep(0);
}
return(count);
}
int Write()
{
var random = new Random();
var count = 0;
startSignal.WaitOne();
for (var i = 0; i < iterations; i++)
{
using (locker.AcquireRead())
{
if (Interlocked.Increment(ref concurrentWriterCounter) != 1)
{
Assert.IsTrue(false, "Many writer at the same time");
}
resource.Add(random.Next(0, 100));
if (Interlocked.Decrement(ref concurrentWriterCounter) != 0)
{
Assert.IsTrue(false, "Many writer at the same time");
}
}
Thread.Sleep(0);
}
return(count);
}
var readThreads = Enumerable.Range(0, 10).Select(p => Task.Run(Read));
var writeThreads = Enumerable.Range(0, 3).Select(p => Task.Run(Write));
Thread.Sleep(10);
startSignal.Set();
foreach (var task in readThreads.Concat(writeThreads))
{
task.Wait();
}
}
