Use this function to add an event to the event queue.
int SDL_PushEvent(SDL_Event* event)
the SDL_Event to be added to the queue
Returns 1 on success, 0 if the event was filtered, or a negative error code on failure; call SDL_GetError() for more information. A common reason for error is the event queue being full.
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The event queue can actually be used as a two way communication channel. Not only can events be read from the queue, but the user can also push their own events onto it. event is a pointer to the event structure you wish to push onto the queue. The event is copied into the queue, and the caller may dispose of the memory pointed to after SDL_PushEvent() returns.
Note: Pushing device input events onto the queue doesn't modify the state of the device within SDL.
This function is thread safe, and can be called from other threads safely.
For pushing application-specific events, please use SDL_RegisterEvents() to get an event type that does not conflict with other code that also wants its own custom event types.