Provided by: libsdl3-doc_3.2.10+ds-1_all 

NAME
SDL_RESTRICT - A macro to tag a pointer variable, to help with pointer aliasing.
HEADER FILE
Defined in SDL3/SDL_begin_code.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_RESTRICT __restrict__
DESCRIPTION
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.
AVAILABILITY
This macro is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.10 SDL_RESTRICT(3)