bug#141: Process sentinel not called in batch mode

[Stefan Monnier]

>> >> This side I understand, but what about the other: why should we not
>> >> check process status in the case where we are not redisplaying?
>> 
>> > Because Emacs generally looks at process output only when it's idle?
>> 
>> I don't follow: we're talking about when should
>> wait_reading_process_output check status_notify.
>> 
>> So to repeat/rephrase my question: why doesn't
>> wait_reading_process_output call status_notify when it is passed a zero
>> do_display?

> Sorry, let me explain my line of thought in more detail: Emacs only
> does a redisplay when it is idle.  Emacs also checks input from
> subprocesses when it is idle.  If we are not in redisplay, it means
> Emacs is not idle, and so it makes sense not to check for subprocess
> output at that time.

> Does this make any sense?

But if we're in wait_reading_process_output, that means that idle or
not, we're checking for process output, so why not check for process
status changes as well?


        Stefan