Re: dynamic linking

[Jan-Benedict Glaw <jbglaw@lug-owl.de>]

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On Mon, 2002-09-09 15:24:57 +0100, Glynn Clements <glynn.clements@virgin.net>
wrote in message <15740.44857.172146.892963@cerise.nosuchdomain.co.uk>:

> > Is it possible to import let's say a class using dlopen?
> 
> No; classes don't exist. At least, they don't exist as data within a
> binary (object file, library, executable). Classes only exist within
> the C++ compiler. The object files only contain individual functions
> and (global) variables.
> 
> While it is possible to dynamically load libraries which are written
> in C++, it's a lot easier if you write C wrappers for the entry
> points.

For each classes constructor, also create a C'ish function exporting a
instantiated class as a void pointer. Then, you'll get access to classes
within the object file (*).

MfG, JBG
(*) It's more or less the only way, but personally I don't like OO
programming, so I don't use it, but co-workers of me do.

-- 
Jan-Benedict Glaw   .   jbglaw@lug-owl.de   .   +49-172-7608481
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