NAME

SDL_HintCallback - A callback used to send notifications of hint value changes.

HEADER FILE

Defined in SDL3/SDL_hints.h

#include "SDL3/SDL.h"

typedef void(SDLCALL *SDL_HintCallback)(void *userdata, const char *name, const char *oldValue, const char *newValue);

This is called an initial time during

SDL_AddHintCallback
with the hint's current value, and then again each time the hint's value changes.

This callback is fired from whatever thread is setting a new hint value. SDL holds a lock on the hint subsystem when calling this callback.

This datatype is available since SDL 3.2.0.