The "quit requested" event
Defined in <SDL3/SDL_events.h>
typedef struct SDL_QuitEvent
{/**< SDL_EVENT_QUIT */
SDL_EventType type;
Uint32 reserved;/**< In nanoseconds, populated using SDL_GetTicksNS() */
Uint64 timestamp; } SDL_QuitEvent;
This struct is available since SDL 3.1.3.