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From: ldg@druin.ATT.COM (Doug Gibbons)
Newsgroups: comp.lang.c++
Subject: Re: Objects and Shared Memory
Message-ID: <420@druin.ATT.COM>
Date: 13 Apr 89 16:11:23 GMT
Distribution: comp
Organization: AT&T, Denver, CO
Lines: 20



Here's another trick for passing objects with virtual functions
through shared memory:

	1) Use +e0/+e1 to create a vtbl.c

	2) Load vtbl.o at the same place in all a.outs that are
	   to share objects. This can be done simply by passing
	   vtbl.o as the first file to ld.

	3) When objects are placed in shared memory, their vtbl
	   ptrs are valid for any a.out address space, even though 
	   the contents of the vtbls may be different in each space.

-- 
--------------------------------------------------------------------------------
-- Doug Gibbons			| ldg@druhi.ATT.COM or att!druhi!ldg
-- AT&T Bell Laboratories 
-- Denver CO