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分類:[.NET 全般]
c#の以下のコードで、Dictionaryにlockがかからない理由を教えてください。
以下コード--------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
namespace ConsoleApplication1
{
class Program
{
private static Dictionary<string, List<string>> test_dict = new Dictionary<string, List<string>>();
static void Main(string[] args)
{
List<string> test_list1 = new List<string>();
test_list1.Add("aaa");
test_list1.Add("bbb");
test_list1.Add("ccc");
List<string> test_list2 = new List<string>();
test_list2.Add("dd");
test_list2.Add("ee");
test_list2.Add("xx");
test_list2.Add("yy");
List<string> test_list3 = new List<string>();
test_list3.Add("ffff");
test_list3.Add("gggg");
test_list3.Add("hhhh");
test_dict.Add("key01", test_list1);
test_dict.Add("key02", test_list2);
test_dict.Add("key03", test_list3);
Thread thread1 = new Thread(new ThreadStart(ThreadMethod1));
thread1.Start();
Thread thread2 = new Thread(new ThreadStart(ThreadMethod2));
thread2.Start();
Console.ReadLine();
}
private static void ThreadMethod1()
{
Console.WriteLine(DateTime.Now.ToString() + " [ThreadMethod1] start");
lock (test_dict)
{
Thread.Sleep(3000);
}
Console.WriteLine(DateTime.Now.ToString() + " [ThreadMethod1] end");
}
private static void ThreadMethod2()
{
Console.WriteLine(DateTime.Now.ToString() + " [ThreadMethod2] start");
lock (test_dict)
{
test_dict.Remove("key02");
}
Console.WriteLine(DateTime.Now.ToString() + " [ThreadMethod2] test_dict.Remove(key02)");
Console.WriteLine(DateTime.Now.ToString() + " [ThreadMethod2] end");
}
}
}
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