c# – 多等待句柄

public void MethodA()
{
    MyManualResetEvent.Reset();
}

public void MethodB()
{
    MyManualResetEvent.Set();
}

假设您不需要停止同时执行的BlockedMethod即可调用MethodA,这可能最容易通过标准的 Monitor类来解决. MethodA和MethodB共享一个计数器,该计数器记录在没有对MethodB的相应调用的情况下调用MethodA的次数. BlockedMethod方法仅在该计数为0时才进行;如果没有,它等待MethodB发出信号表明是时候继续了.

object mylock = new object();
int count = 0;

public void MethodA()
{
    // record that MethodA is executing
    lock (mylock)
        count++;

    // other code...
}

public void MethodB()
{
    // other code...

    lock (mylock)
    {
        // MethodB has Now finished running
        count--;

        // wake up other thread because it may Now be allowed to run
        Monitor.Pulse(mylock);
    }
}

public void BlockedMethod()
{
    // wait until the number of calls to A and B is equal (i.e.,count is 0)
    lock (mylock)
    {
        while (count != 0)
             Monitor.Wait(mylock);
    }

    // calls to A and B are balanced,proceed...
}