CLIM mail archive
Updating the screen from a separate process
Date: Fri, 28 Aug 1992 10:17 EDT
I have a multi-process clim application. The main process uses clim to
interact with the user. A second process accepts data from an external
source and updates the internal data structures that the first process
uses to paint the screen.
Whenever the second process gets new data, I would like it to call the
display-function that the first process uses. Unfortunately, such a
call is apparently incompatible with the normal call to the
display-function from the first process; the screen gets completely
Are you calling the pane's display function directly, or calling
CLIM:REDISPLAY-FRAME-PANE? Are you using incremental redisplay? Do
the two processes compete for a lock that prevents CLIM's internal
datastructures from getting messed up?
You can use CLIM-UTILS::INITIAL-LOCK-VALUE to create a lock, and
CLIM-UTILS::WITH-LOCKF to hold it. In CLIM 2.0, these will be exported
(under different names) from the CLIM-SYS package.
An alternative would be for the second process to have some way of
triggering a display cycle in the first process. I don't know how to do
that. Does anyone? Thanks.
-- Russ Abbott
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