the interface that implements this SDL_IOStream, initialized using SDL_INIT_INTERFACE().
the pointer that will be passed to the interface functions.
A pointer to the allocated memory on success or NULL on failure; call SDL_GetError() for more information.
Threadsafety: It is safe to call this function from any thread.
SDL_CloseIO SDL_INIT_INTERFACE SDL_IOFromConstMem SDL_IOFromFile SDL_IOFromMem
Create a custom SDL_IOStream.
Applications do not need to use this function unless they are providing their own SDL_IOStream implementation. If you just need an SDL_IOStream to read/write a common data source, you should use the built-in implementations in SDL, like SDL_IOFromFile() or SDL_IOFromMem(), etc.
This function makes a copy of iface and the caller does not need to keep it around after this call.