From: z007400b AT bcfreenet DOT seflin DOT org (Ralph Silverman)
Newsgroups: comp.lang.c,comp.os.msdos.djgpp,alt.comp.shareware,comp.os.msdos.programmer,rec.msdos.programmer
Subject: Re: HELP: Overlayed Programs/Functions
Followup-To: comp.lang.c,comp.os.msdos.djgpp,alt.comp.shareware,comp.os.msdos.programmer,rec.msdos.programmer
Date: 12 Jun 1997 15:12:23 GMT
Organization: SEFLIN Free-Net - Broward
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To: djgpp AT delorie DOT com
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Michael D. Ryan (dbrotherhood AT geocities DOT com) wrote:
: 	
: How would I use functions from program1 in a spawned program
: (program2)?  IE: I have functions for drawing screens, dialogueboxes,
: etc.  I want to use them in my spawned program program2 without having
: to include them in a compiled stand-alone version.  The functions
: library is huge 500K and is not worth including in some programs.  So
: I would like to be able to use the functions by running program2 from
: program1 (which is a shell of sorts).  Is there any way to do this?

: How does Windows do it?  How can programming windows programs not
: require rewriting/compiling all the classes for dialogue boxes, 3d
: objects, etc.  Will I have to write my own OS to do this... ?  

: Thanks..

: --
: Michael D. Ryan [Brotherhood Software] dbrotherhood AT geocities DOT com
: Web Page:  http://www.geocities.com/SiliconValley/Pines/5301/
: Shareware Trakker: http://www.alberts.com/AuthorPages/00014388/ST1.HTM
: Items For Sale: http://www.geocities.com/SiliconValley/Pines/5301/sale.html
: ** Advertising items for sale and software links available (free) **
: --

	( historic ...
		in times past
		a process might
		be limited to
		e.g.  32k core !
		sophisticated software systems
		would limit functionality ...
		by modularization into
		different processes
		and
			intercommunicate
		through
			reading and writing
			files
		!

		sophisticated operating systems
		such as early
			unix
		developed specialized methods
		of
			interprocess communications
		...

		a powerful modern dos compiler ...
		utilizing this 'overlaying'
		approach is hi-tech 'pacific' ppd
		'shareware' ...
	)

	best to limit function library utilization
	to one process and intercommunicate ...
	if using unix
	see
		pipe(2)
	.
	use of 'scratch file' with modern systems
	may not be too costly ...
	also;  can create process history of session
	... a valuable side-effect !

--

Ralph Silverman
z007400b AT bcfreenet DOT seflin DOT lib DOT fl DOT us