alloc api having new attributes for micro optimisations.

[devnexen]

• SDL_MALLOC when the pointer returned is not aliased.
• SDL_ALLOC_SIZE* to gives hint about the size.

[meyraud705]

GCC 11 added attribute malloc (deallocator, ptr-index) which detects mismatched allocation and deallocation functions (like the one found in 4ada14a) . It could be useful for objects that need a specific deallocator like SDL_CreateRGBSurface()/SDL_FreeSurface().

example: __attribute__((malloc, malloc (fclose, 1))) FILE* fopen(const char*, const char*);

https://gcc.gnu.org/onlinedocs/gcc-11.3.0/gcc/Common-Function-Attributes.html#Common-Function-Attributes

[devnexen]

GCC 11 added attribute malloc (deallocator, ptr-index) which detects mismatched allocation and deallocation functions (like the one found in 4ada14a) . It could be useful for objects that need a specific deallocator like SDL_CreateRGBSurface()/SDL_FreeSurface().

example: __attribute__((malloc, malloc (fclose, 1))) FILE* fopen(const char*, const char*);

https://gcc.gnu.org/onlinedocs/gcc-11.3.0/gcc/Common-Function-Attributes.html#Common-Function-Attributes

I know but clang does not :-|

[icculus]

(Nominating this for SDL3.)

[icculus]

If the deallocation attribute make sense later, and doesn't need us to make drastic changes to support it, let's talk about that in a separate issue or PR.