RE: libltdl examples

[Bob Friesenhahn]

On Fri, 30 Dec 2005, Eric Lemings wrote:
> I'm writing a library (or collection of libraries really) that has
> a "front end" interface library and several "back end" implementation
> libraries.  The front end basically has a single point of entry: a
> factory method that accepts a string that identifies a particular
> back end.  The back end library is then dynamically loaded and used
> to create the appropriate environment object.  Note, multiple back
> ends can be in use at the same time.

Sounds great.  So you can have the method you locate be a "factory" 
method which constructs an object derived from a common base class. 
Once you have a returned object, you can just use all of its methods.

Typically you want to have a way to map the string into a module name. 
Usually this can be done via simple concatenation.  If multiple 
strings can map to the same module, then more smarts are required.

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/