Introduction and first question

Hi, My name is Jens Kilian and I'm interested in porting Open CASCADE to the Be Operating System (BeOS). In a previous job I worked on a similar application, but I'm doing the port in my spare time. I've downloaded the code and am in the process of getting the Foundation Classes to compile; there are very few problems, all of them in the operating system specific code (memory manager and OSD). I noticed that there seem to be two substantially identical memory managers, one in Standard/Standard.cxx and another in Standard/StandardCSFDB.cxx. Both seem to be used. I haven't found any references in the documentation as to the existence of the two memory managers; can anybody explain why two are needed, and how they are used in the code?

Thanks in advance,

Jens.