SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Pump the event loop, gathering events from the input devices.


void SDL_PumpEvents(void);


This function updates the event queue and internal input device state.

WARNING: This should only be run in the thread that initialized the video subsystem, and for extra safety, you should consider only doing those things on the main thread in any case.

SDL_PumpEvents() gathers all the pending input information from devices and places it in the event queue. Without calls to SDL_PumpEvents() no events would ever be placed on the queue. Often the need for calls to SDL_PumpEvents() is hidden from the user since SDL_PollEvent() and SDL_WaitEvent() implicitly call SDL_PumpEvents(). However, if you are not polling or waiting for events (e.g. you are filtering them), then you must call SDL_PumpEvents() to force an event queue update.


This function is available since SDL 3.0.0.

CategoryAPI, CategoryEvents

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