There appears to be lots of information about how to asynchronously implement synchronous functions - however I have the opposite problem and there is a dearth of information about it...
I have a network lib I am using. All calls are asynchronous - that's good. However, I need to make SOME calls synchronously - in that I want the program (or at least the current thread) to stop and wait for the response (or time out). This is for things like filling in a form for a user to read and make selections...
There are all kinds of ways such as a simple spinwait
Maybe this is acceptable, but it seems hacky to me. For one, it requires two global variables - the boolean (bsomething in the example above) and a global to hold the data that arrived asynchronously. Is there a pattern others use for these things?
Is this a place where a callback makes sense (I've not done any callbacks yet...)?
I have a network lib I am using. All calls are asynchronous - that's good. However, I need to make SOME calls synchronously - in that I want the program (or at least the current thread) to stop and wait for the response (or time out). This is for things like filling in a form for a user to read and make selections...
There are all kinds of ways such as a simple spinwait
Code:
Dim sw as new Stopwatch
sw.start
Do until bsomething = true or sw.elapsedmilliseconds >= TIMEOUT
Threading.thread.sleep(25)
Application.DoEvents
Loop
If sw.Elapsedmilliseconds > TIMEOUT then
'notify user of timeout
Else
'process the data that arrived inside the asyc function
End if
Is this a place where a callback makes sense (I've not done any callbacks yet...)?