我有三个两类
Class A{
function A.1()
{
1. First calls B.2()
2. Checks for value X in class B.
}
}
Class B {
function B.1()
{
/*this function sets the variable X to true*/
}
function B.2()
{
/*Initiates the thread eventually that will start the function B.1 on different thread*/
}
}
我想修改它,这样,A.1()应该等到X在类B中被设置/修改。这就是我的方法:
Class A{
function A.1()
{
1. First calls B.2()
**2. Call WaitforSet in class B**
3. Checks for value X in class B.
}
}
Class B {
/* Created one autoreset event S*/
function B.1()
{
/*this function sets the variable X to true*/
S.Set();
}
function B.2()
{
/*Initiates the thread eventually that will start the function B.1 on different thread*/
}
waitforSet()
{
S.waitone();
}
}
我不知道为什么这不起作用,因为它让两个线程都处于等待状态。我希望waitforSet()
函数应该将调用线程置于等待状态,内部将继续设置X。当我在waitforSet()
和B.1()
中检查当前线程的托管线程id时,它们是不同的。
有人能告诉我我在这里错过了什么吗?或者更好的方法来实现这一点吗?
p.S:我在C#中实现了这一点
我创建了这个,它正常工作,你确定在构造函数中将AutoResetEvent的初始状态设置为false吗?
class Program
{
static void Main(string[] args)
{
Thread.CurrentThread.Name = "Console Thread";
var a = new A();
a.A1();
Console.WriteLine("Press return to exit...");
Console.Read();
}
}
public class A
{
public void A1()
{
var b = new B();
b.B2();
b.WaitForSet();
Console.WriteLine("Signal received by " + Thread.CurrentThread.Name + " should be ok to check value of X");
Console.WriteLine("Value of X = " + b.X);
}
}
public class B
{
private AutoResetEvent S = new AutoResetEvent(false);
public bool X { get; private set; }
public void B1()
{
X = true;
Console.WriteLine("X set to true by " + Thread.CurrentThread.Name);
S.Set();
Console.WriteLine("Release the hounds signal by " + Thread.CurrentThread.Name);
}
public void B2()
{
Console.WriteLine("B2 starting thread...");
var thread = new Thread(new ThreadStart(B1)) { Name = "B Thread" };
thread.Start();
Console.WriteLine("Value of X = " + X + " Thread started.");
}
public void WaitForSet()
{
S.WaitOne();
Console.WriteLine(Thread.CurrentThread.Name + " Waiting one...");
}
}