using System;
using System.Threading;
 
namespace Recetas.CSharp.Cap04.R0411
{
    public sealed class UsoExchange
    {
        // Valor de dato compartido entre threads:
        private static int variable = 0;
 
        public static void Main()
        {
            // Creación de un thread:
            Thread t = new Thread(Asignar);
 
            // Inicio de la ejecución del thread:
            t.Start();
 
            // Espera su finalización:
            t.Join();
 
            // Muestra el valor final de `variable`:
            Console.WriteLine ("\nValor de `variable`: {0}\n", variable.ToString());
        }
 
        private static void Asignar()
        {
            // Asigna 10 a `variable`:
            Interlocked.Exchange(ref variable, 10);
 
            // Uso de `Interlocked.CompareExchange`:
            Int32 resultado = Interlocked.CompareExchange(ref variable, 20, 10);
 
            // Muestra en pantalla el valor asignado:
            Console.WriteLine ("\nEl valor de `resultado`: {0}", resultado.ToString());
        }
    }
}

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