The "quit requested" event
Defined in <SDL3/SDL_events.h>
typedef struct SDL_QuitEvent
{
SDL_EventType type; /**< SDL_EVENT_QUIT */
Uint32 reserved;
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
} SDL_QuitEvent;
This struct is available since SDL 3.0.0.