[Bf-committers] LLP64 / LP64 (win64 vs rest) issue

[Daniel Genrich]

Hi there,

In an attempt to create a Windows 64bit version, Blender needs an 
official way to deal with the fact that:

long is 32bit on Win64 (LP64)
long is 64bit on Linux64/Mac64 (LLP64)


So the whole long-pointer casting is kind of going wrong on Win64 and 
therefore crashing Blender.

As a proposal I suggest not to use "long" but to introduce the C99/C9X 
standard type "uintptr_t" which is already used in many header of the 
libs which Blender uses (ffmpeg, python, X264, SDL). This type would 
allow instant pointer fiddling and cross plattform compatibility between 
LLP64 and LP64 plattforms.

I would also search-replace the existing "long"s in Blender.

The goal for this is post-2.47 so we can test it on several plattforms 
and harden it a bit (e.g. some older compilers don't define that 
uintptr_t type).

Any comments / suggestions?

Greetings
Daniel / Genscher