Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_stack_alloc - Allocate memory on the stack (maybe).
HEADER FILE
Defined in SDL3/SDL_stdinc.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_stack_alloc(type, count) (type*)alloca(sizeof(type)*(count))
DESCRIPTION
If SDL knows how to access alloca() on the current platform, it will use it to stack-allocate memory here. If it doesn't, it will use SDL_malloc () to heap-allocate memory. Since this might not be stack memory at all, it's important that you check the returned pointer for NULL, and that you call SDL_stack_free on the memory when done with it. Since this might be stack memory, it's important that you don't allocate large amounts of it, or allocate in a loop without returning from the function, so the stack doesn't overflow.
RETURN VALUE
Returns newly-allocated memory, or NULL on failure.
THREAD SAFETY
It is safe to call this macro from any thread.
AVAILABILITY
This macro is available since SDL 3.2.0.
SEE ALSO
•(3), SDL_stack_free(3) Simple Directmedia Layer SDL 3.2.8 SDL_stack_alloc(3)