How to Sleep a thread until callback for asynchronous function is received?

Question

I have a function that needs to be executed only when a callback is received from asynchronous function.

Like

I call asynchronous function Stop()

Answer 1

Since these look like member functions, you can add an event member variable (either a ManualResetEvent or an AutoResetEvent. Then in the Stop() method you set the event to signaled. In between the calls to Stop() and Start() you wait for the event.

private AutoResetEvent _stopped = new AutoResetEvent(false);

public void SomeFunction()
{
     Stop();
     _stopped.WaitOne();
     Start();
}

In the stop function you would do

private void Stop()
{
    try
    {
         // Your code that does something to stop
    }
    finally
    {
         _stopped.Set();  // This signals the event
    }
}

If using a ManualResetEvent -

private ManualResetEvent _stopped = new ManualResetEvent(false);

public void SomeFunction()
{
     Stop();
     _stopped.WaitOne();
     Start();
}

private void Stop()
{
    try
    {
         // Your code that does something to stop
    }
    finally
    {
         _stopped.Set();  // This signals the event
    }
}

private void Start()
{
    _stopped.Reset();

    // Your other start code here
}