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using System;
using System.Threading;

namespace ProcessTest
{
    class Program
    {
        //資源
        static int theResource = 0;
        //讀、寫操作鎖
        static ReaderWriterLock rwl = new ReaderWriterLock();

        static void Main(string[] args)
        {
            //分別創(chuàng)建2個(gè)讀操作線程，2個(gè)寫操作線程，并啟動(dòng)
            Thread tr0 = new Thread(new ThreadStart(Read));
            Thread tr1 = new Thread(new ThreadStart(Read));
            Thread tr2 = new Thread(new ThreadStart(Write));
            Thread tr3 = new Thread(new ThreadStart(Write));

            tr0.Start();
            tr1.Start();
            tr2.Start();
            tr3.Start();

            //等待線程執(zhí)行完畢
            tr0.Join();
            tr1.Join();
            tr2.Join();
            tr3.Join();

            System.Console.ReadKey();
        }

        //讀數(shù)據(jù)
        static void Read()
        {
            for (int i = 0; i < 3; i++)
            {
                try
                {
                    //申請(qǐng)讀操作鎖，如果在1000ms內(nèi)未獲取讀操作鎖，則放棄
                    rwl.AcquireReaderLock(1000);
                    Console.WriteLine("開始讀取數(shù)據(jù)，theResource = {0}", theResource);
                    Thread.Sleep(10);
                    Console.WriteLine("讀取數(shù)據(jù)結(jié)束，theResource = {0}", theResource);
                    //釋放讀操作鎖
                    rwl.ReleaseReaderLock();
                }
                catch (ApplicationException)
                {
                    //獲取讀操作鎖失敗的處理
                }
            }
        }

        //寫數(shù)據(jù)
        static void Write()
        {
            for (int i = 0; i < 3; i++)
            {
                try
                {
                    //申請(qǐng)寫操作鎖，如果在1000ms內(nèi)未獲取寫操作鎖，則放棄
                    rwl.AcquireWriterLock(1000);
                    Console.WriteLine("開始寫數(shù)據(jù)，theResource = {0}", theResource);
                    //將theResource加1
                    theResource++;
                    Thread.Sleep(100);
                    Console.WriteLine("寫數(shù)據(jù)結(jié)束，theResource = {0}", theResource);
                    //釋放寫操作鎖
                    rwl.ReleaseWriterLock();
                }
                catch (ApplicationException)
                {
                    //獲取寫操作鎖失敗
                }
            }
        }
    }
}