🚀 go-pugleaf

vampyr@bu.edu (Eamon Daly) writes:

>We have a foxpro program which loops continuously,
>checking for the  presence  of  input files  in  a
>certain directory. Unfortunately,   the    program
>locks out the function  keys occasionally so  that
>switching  between  ttys   on   the   console   is
>impossible.

If you have an application which loops continuously, running under Unix
(even in Foxpro), I would consider the program broken....  Try to get the
loop removed, it is a waste of valuable CPU time.

>Has anyone had this problem? We've tried using the
>-i and -o options so  that the terminal is treated
>as a serial terminal, but the program runs so slow
>in this mode that we're deathly afraid of using it
>all of the time.

It should not be much slower..... at least, it is not using any additional
CPU time doing it as a serial terminal, so I wouldn't worry about it too
much.  I would worry more about getting the loop removed!
-- 
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  | Mark A. Davis     | Lake Taylor Hospital | Norfolk,VA (804)-461-5001x431 |
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In article <1995Mar29.220157.23800@taylor.infi.net>,
Mark Davis <mark@taylor.infi.net> wrote:
>vampyr@bu.edu (Eamon Daly) writes:
>>We have a foxpro program which loops continuously,

problem #1

>If you have an application which loops continuously, running under Unix
>(even in Foxpro), I would consider the program broken....  Try to get the
>loop removed, it is a waste of valuable CPU time.

Much better to use inkey(1) to pause 1 second between looks.
Much easier on CPU time. :)

Tim Kuehn

Mark Davis (mark@taylor.infi.net) wrote:
: vampyr@bu.edu (Eamon Daly) writes:

: >We have a foxpro program which loops continuously,
: >checking for the  presence  of  input files  in  a
: >certain directory. Unfortunately,   the    program
: >locks out the function  keys occasionally so  that
: >switching  between  ttys   on   the   console   is
: >impossible.

: If you have an application which loops continuously, running under Unix
: (even in Foxpro), I would consider the program broken....  Try to get the
: loop removed, it is a waste of valuable CPU time.

I'd definitely concur there -- this works well under DOS, but not under
Unix. There's some spoofing you could do with the terminal driver and
termio ioctl() calls, but for some reason I doubt you can access them
from inside FoxPro.

Basically, I'm guess you're sitting waiting for the next keystroke and
attempting to do some work procedure while there isn't one?

-scottm