C#多线程同步(一)【计数器】

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ICounter.cs类:

interface ICounter    {        void Increment();        void Decrement();    }

Counter.cs类:

 class Counter : ICounter    {        private int _count = 0;        public int Count { get { return _count; } }        public void Increment()        {            _count ++;        }        public void Decrement()        {            _count--;        }    }

CounterLock.cs代码:

 class CounterLock : ICounter    {        private int _count;        public int Count { get { return _count; } }        public void Increment()        {            Interlocked.Increment(ref _count);        }        public void Decrement()        {            Interlocked.Decrement(ref _count);        }    }

Test.cs代码:

 class Test    {        public static void TestCounter(ICounter c)        {            for (int i = 0; i < 100000; i ++)            {                c.Increment();                c.Decrement();            }        }        public static void RunTest()        {            var c1 = new Counter();            var t1 = new Thread((() => TestCounter(c1)));            var t2 = new Thread((() => TestCounter(c1)));            var t3 = new Thread((() => TestCounter(c1)));            t1.Start();            t2.Start();            t3.Start();            t1.Join();            t2.Join();            t3.Join();            Console.WriteLine("总数: {0}", c1.Count);            Console.WriteLine("--------------------------");            Console.WriteLine("普通计数器");            Console.WriteLine("");            var c2 = new CounterLock();            t1 = new Thread((() => TestCounter(c2)));            t2 = new Thread((() => TestCounter(c2)));            t3 = new Thread((() => TestCounter(c2)));            t1.Start();            t2.Start();            t3.Start();            t1.Join();            t2.Join();            t3.Join();            Console.WriteLine("总数: {0}", c2.Count);            Console.WriteLine("--------------------------");            Console.WriteLine("线程同步的计数器");            Console.ReadKey();        }    }

运行结果如图:

这里写图片描述

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