SDL_EventFilter.3type - Man Page

#include <SDL3/SDL_events.h>

typedef bool (SDLCALL *SDL_EventFilter)(void *userdata, SDL_Event *event);

userdata

what was passed as userdata to SDL_SetEventFilter() or SDL_AddEventWatch, etc.

event

the event that triggered the callback.

Returns true to permit event to be added to the queue, and false to disallow it. When used with SDL_AddEventWatch, the return value is ignored.

SDL may call this callback at any time from any thread; the application is responsible for locking resources the callback touches that need to be protected.

This datatype is available since SDL 3.2.0.

SDL_SetEventFilter(3), SDL_AddEventWatch(3)