[英]AutoResetEvent() in C#
我有三個兩節課
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,以便A.1()應該等到X在類B中設置/修改。這就是我的方法:
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();
}
}
我不確定為什么這行不通,因為這兩個線程都處於等待狀態。 我期望waitforSet()
函數應該已經將調用線程置於等待狀態,並且內部將繼續設置X。當我在waitforSet()
和B.1()
檢查了當前線程的托管線程ID時,它們是不同的。
有人可以告訴我我在這里缺少什么,或者更好的方法來實現這一目標嗎?
PS:我正在用C#實現
我創建了它並且它正常工作,您確定要在構造函數中將AutoResetEvent的初始狀態設置為false嗎?
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...");
}
}
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