Data commit

Task/Metered-concurrency/C-sharp/metered-concurrency.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace RosettaCode
+{
+  internal sealed class Program
+  {
+    private static void Worker(object arg, int id)
+    {
+      var sem = arg as SemaphoreSlim;
+      sem.Wait();
+      Console.WriteLine("Thread {0} has a semaphore & is now working.", id);
+      Thread.Sleep(2*1000);
+      Console.WriteLine("#{0} done.", id);
+      sem.Release();
+    }
+
+    private static void Main()
+    {
+      var semaphore = new SemaphoreSlim(Environment.ProcessorCount*2, int.MaxValue);
+
+      Console.WriteLine("You have {0} processors availiabe", Environment.ProcessorCount);
+      Console.WriteLine("This program will use {0} semaphores.\n", semaphore.CurrentCount);
+
+      Parallel.For(0, Environment.ProcessorCount*3, y => Worker(semaphore, y));
+    }
+  }
+}