SDL_AddHintCallback

Add a function to watch a particular hint.

Header File

int SDL_AddHintCallback(const char *name,
                    SDL_HintCallback callback,
                    void *userdata);

const char *	name	the hint to watch.
SDL_HintCallback	callback	an SDL_HintCallback function that will be called when the hint value changes.
void *	userdata	a pointer to pass to the callback function.

(int) Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

It is NOT safe to call this function from two threads at once.

This function is available since SDL 3.0.0.