银行账户锁：Transaction:Lock(this)

最新推荐文章于 2025-11-01 18:31:41 发布

原创最新推荐文章于 2025-11-01 18:31:41 发布 · 393 阅读

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CC 4.0 BY-SA版权

文章标签：

#thread #random #exception #class

本文通过一个简单的账户类示例，展示了如何在多线程环境下进行安全的资金操作。涉及锁机制确保并发操作的一致性和正确性。

using System;
using System.Threading;

namespace ThreadSimple
{
    internal class Account
    {
        int balance;
        Random r = new Random();
        internal Account(int initial)
        {
            balance = initial;
        }
        internal int Withdraw(int amount)
        {
            if (balance < 0)
            {
                throw new Exception("Negative Balance");
            }
            lock (this)
            {
                Console.WriteLine("Current Thread:" + Thread.CurrentThread.Name);
                if (balance >= amount)
                {
                    Thread.Sleep(500);
                    balance = balance - amount;
                    Console.WriteLine(amount);
                    Console.WriteLine(balance);
                    return amount;
                }
                else
                {
                    return 0;
                }
            }
        }
        internal void DoTransactions()
        {
                Withdraw(r.Next(-100, 100));
        }
    }

    internal class Test
    {
        static internal Thread[] threads = new Thread[10];
        public static void Main()
        {
            Account acc = new Account(1000);
            for (int i = 0; i < 10; i++)
            {
                Thread t = new Thread(new ThreadStart(acc.DoTransactions));
                threads[i] = t;
            }
            for (int i = 0; i < 10; i++)
                threads[i].Name = i.ToString();
            for (int i = 0; i < 10; i++)
                threads[i].Start();
            Console.ReadLine();
        }
    }
}