DOKK / manpages / debian 13 / libsdl3-doc / SDL_RESTRICT.3.en
SDL_RESTRICT(3) SDL3 FUNCTIONS SDL_RESTRICT(3)

SDL_RESTRICT - A macro to tag a pointer variable, to help with pointer aliasing.

Defined in SDL3/SDL_begin_code.h

#include "SDL3/SDL.h"
#define SDL_RESTRICT __restrict__

A good explanation of the restrict keyword is here:

https://en.wikipedia.org/wiki/Restrict

On compilers without restrict support, this is defined to nothing.

This macro is available since SDL 3.2.0.

SDL 3.2.10 Simple Directmedia Layer