mesa/src/gallium

	      CROSS-PLATFORM PORTABILITY GUIDELINES FOR GALLIUM3D 


= General Considerations =

The state tracker and winsys driver support a rather limited number of
platforms. However, the pipe drivers are meant to run in a wide number of
platforms. Hence the pipe drivers, the auxiliary modules, and all public
headers in general, should stricly follow these guidelines to ensure


= Compiler Support =

* Include the p_compiler.h.

* Don't use the 'inline' keyword, use the INLINE macro in p_compiler.h instead.

* Cast explicitly when converting to integer types of smaller sizes.

* Cast explicitly when converting between float, double and integral types.

* Don't use named struct initializers.

* Don't use variable number of macro arguments. Use static inline functions
instead.


= Standard Library =

* Avoid including standard library headers. Most standard library functions are
not available in Windows Kernel Mode. Use the appropriate p_*.h include.

== Memory Allocation ==

* Use MALLOC, CALLOC, FREE instead of the malloc, calloc, free functions.

* Use align_pointer() function defined in p_util.h for aligning pointers in a
portable way.

== Debugging ==

* Use the functions/macros in p_debug.h.

* Don't include assert.h, call abort, printf, etc.