SDL_stack_alloc - Allocate memory on the stack (maybe).

       This macro is available since SDL 3.2.0.

       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.

type   the datatype of the memory to allocate.

       count  the number of type objects to allocate.

       SDL_stack_alloc - Allocate memory on the stack (maybe).

       Returns newly-allocated memory, or NULL on failure.

SDL_stack_free(3)

Simple Directmedia Layer                           SDL 3.2.20                                 SDL_stack_alloc(3)

#include<SDL3/SDL_stdinc.h>#defineSDL_stack_alloc(type,count)(type*)alloca(sizeof(type)*(count))

       It is safe to call this macro from any thread.