public static SingleFirst CreateInstance()
{
if (_SingleFirst == null) //为了不用等待
{
Console.WriteLine("等待....");
lock (_Singlelock) //保证只有一个线程进去，其余线程等待
{
if (_SingleFirst == null) //如果为空，则创建
{
_SingleFirst = new SingleFirst();
}
}
}
return(_SingleFirst);
}
public override void Open()
{
Console.WriteLine("******************************************************************");
//单例一
{
SingleFirst first = SingleFirst.CreateInstance();
//单线程构造
for (int i = 0; i < 10; i++)
{
SingleFirst first1 = SingleFirst.CreateInstance();
first1.Show();
}
//多线程构造
List <IAsyncResult> async = new List <IAsyncResult>();
for (int i = 0; i < 10; i++)
{
async.Add(
new Action(() =>
{
SingleFirst first1 = SingleFirst.CreateInstance();
first1.Show();
}).BeginInvoke(null, null));
}
Console.WriteLine("********************************************");
while (async.Count(t => !t.IsCompleted) > 0)
{
Thread.Sleep(1000);
}
for (int i = 0; i < 10; i++)
{
async.Add(
new Action(() =>
{
SingleFirst first1 = SingleFirst.CreateInstance();
first1.Show();
}).BeginInvoke(null, null));
}
}
//单例二
{
//SingleSecond second = SingleSecond.CreateInstance();
//for (int i = 0; i < 10; i++)
//{
// SingleSecond second = SingleSecond.CreateInstance();
// second.Show();
//}
}
//单例三
{
//SingleThird third = SingleThird.CreateInstance();
//third.Show();
for (int i = 0; i < 10; i++)
{
SingleThird third = SingleThird.CreateInstance();
third.Show();
}
}
Console.WriteLine("******************************************************************");
Console.ReadKey();
}