Re: Message Waiting Indicator

Hello Rob,

Am 08.07.2020 um 13:20 schrieb Rob Berendt <rob@xxxxxxxxx>:

I am curious as to whether or not this screen was waiting on input. Most people use EXEFMT to display screens. This is because they write some stuff out, then read some input from the user.

You nailed it. That's the main problem. If your application is waiting for response from the user, there can no write happen, for two reasons:
- The program is in DSPW and waits for input to read, when the user presses enter,
- The program is stuck at READ and can't continue other tasks, so it's useless anyway to be able to do a write. With what?

A possible use case for my question would be a chat program, like https://en.wikipedia.org/wiki/Talk_(software) but line-oriented instead of character based. Maybe the data queue approach mentioned by [error, can't find the message anymore] with two programs or threads might be a possible solution? One for the sending side, one for the receiver, to put received messages into the queue, to be displayed as soon as they arrive, hopefully *without* erasing what the user began to type?

I guess I'll need to check this out with a proof of concept program.

:wq! PoC

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