Shared Memory and Scn_assmblr
jpl284 at cit-vax.ARPA
jpl284 at cit-vax.ARPA
Mon Sep 17 14:57:47 AEST 1984
From: Jonathan Leech <jpl284 at cit-vax.ARPA>
Can anyone tell me if it's possible for processes to share
memory, and how to do it (on at 4.2 11/780)? The problem I have is as
follows:
I am trying to convert Frank Crow's scn_assmblr to use an
in-memory frame buffer. Scn_assmblr has a top-level process (the
'task_master') which depth-sorts objects and then creates other
processes to which it pipes information on rendering polygons and
performing other manipulations on the frame buffer. The approach I
am using right now is to create an appropriate size file (1 Mbyte),
then read and write it in every process that is invoked.
Unfortunately the time required to read and write the file is fairly
significant and one goal is to get the program running as fast as
possible.
I would like to allocate the frame buffer memory and then
share it among the various processes, but I don't see any way to do
this. Any help would be greatly appreciated.
Thanks,
Jon Leech
jpl284 at cit-vax
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