SDL_MainThreadCallback - Callback run on the main thread.

       This datatype is available since SDL 3.2.0.

userdata
              an app-controlled pointer that is passed to the callback.

       Defined in SDL3/SDL_init.h

       SDL_MainThreadCallback - Callback run on the main thread.

•(3), SDL_RunOnMainThread(3)

Simple Directmedia Layer                           SDL 3.2.10                      SDL_MainThreadCallback(3type)

#include"SDL3/SDL.h"typedefvoid(SDLCALL*SDL_MainThreadCallback)(void*userdata);