/// <summary>
/// 获取线程安全的单例实例
/// 在第一次调用的时候创建单例实例
/// </summary>
/// <returns></returns>
public static SingletonV2 GetInstance()
{
//使用锁来保证线程安全
if (_instance == null)
{
lock (lockObj)
{
if (_instance == null)
{
_instance = new SingletonV2();
}
}
}
return _instance;
}
/// <summary>
/// 获取线程安全的单例实例
/// 在第一次调用的时候创建单例实例
/// </summary>
/// <returns></returns>
public static SingletonV2 GetInstance()
{
//使用锁来保证线程安全
if (_instance == null)
{
lock (lockObj)
{
if (_instance == null)
{
_instance = new SingletonV2();
}
}
}
return(_instance);
}
static void Main(string[] args)
{
ClassicSingleton classicSingleton1 = ClassicSingleton.GetInstance();
ClassicSingleton classicSingleton2 = ClassicSingleton.GetInstance();
Console.WriteLine(classicSingleton1 == classicSingleton2);
SingletonV1 singletonV1_1 = SingletonV1.GetInstance();
SingletonV1 singletonV1_2 = SingletonV1.GetInstance();
Console.WriteLine(singletonV1_1 == singletonV1_2);
SingletonV2 singletonV2_1 = SingletonV2.GetInstance();
SingletonV2 singletonV2_2 = SingletonV2.GetInstance();
Console.WriteLine(singletonV2_1 == singletonV2_2);
Console.ReadLine();
}
