Using a timer to wait for processes to complete

Question

Imagine there are two buttons that call an asynchronous function

  int packProcesses=0;  //the number of processes we are dealing with
    bool busy = false;  //         


        

Answer 1

if you can at all, I would try and avoid having your button6_Click and button5_Click methods returning void. if instead you have them return a Task you can await them.

private async Task button5_Click(object sender, EventArgs e) 
{ ... }

private async Task button8_Click(object sender, EventArgs e) 
{
     await button5_Click(sender, e);
     await button6_Click(sender, e);
}

edit:

private async Task HandleButton5_Click() 
{
     ...
}    

private async void button5_Click(object sender, EventArgs e) 
{  
    await HandleButton5_Click();
}

private async void button8_Click(object sender, EventArgs e) 
{
     button5_Click(sender, e);
     button6_Click(sender, e);
}

Answer 2

You can move your logic from inside the handler to another method:

private async void button1_Click(object sender, EventArgs e)
{
    await Process1();
}

private async Task Process1()
{
    packProcesses++;
    busy = true;
    Trace.WriteLine("PROCESSES " + packProcesses + " busy? " + busy);
    //Do something
    var result = await DelayAndReturnAsync(v);
    //finished?
    packProcesses--;
    if (packProcesses <= 0) busy = false;
    Trace.WriteLine("Processes " + packProcesses + " busy? " + busy);
}

private async void button2_Click(object sender, EventArgs e)
{
    await Process2();
}

private async Task Process2()
{
    packProcesses++;
    busy = true;
    Trace.WriteLine("PROCESSES " + packProcesses + " busy? " + busy);

    //Do something
    var result = await DelayAndReturnAsync(v);
    //finished?
    packProcesses--;
    if (packProcesses <= 0) busy = false;
    Trace.WriteLine("Processes " + packProcesses + " busy? " + busy);
}

Then you can await both them:

private async void button3_Click(object sender, EventArgs e)
{
    await Process1();
    await Process2();
}