NAME¶

SDL_PeepEvents - Check the event queue for messages and optionally return them.

HEADER FILE¶

Defined in SDL3/SDL_events.h

SYNOPSIS¶

#include "SDL3/SDL.h"

int SDL_PeepEvents(SDL_Event *events, int numevents, SDL_EventAction action, Uint32 minType, Uint32 maxType);

DESCRIPTION¶

action may be any of the following:

• SDL_ADDEVENT : up to numevents events will be added to
the back of the event queue.

• SDL_PEEKEVENT : numevents events at the front of the
event queue, within the specified minimum and maximum type, will be
returned to the caller and will _not_ be removed from the queue. If you
pass NULL for events , then numevents is ignored and the total number
of matching events will be returned.

• SDL_GETEVENT : up to numevents events at the front of
the event queue, within the specified minimum and maximum type, will be
returned to the caller and will be removed from the queue.

You may have to call SDL_PumpEvents () before calling this function. Otherwise, the events may not be ready to be filtered when you call SDL_PeepEvents ().

FUNCTION PARAMETERS¶

events

destination buffer for the retrieved events, may be NULL to leave the events in the queue and return the number of events that would have been stored.

numevents

if action is SDL_ADDEVENT , the number of events to add back to the event queue; if action is SDL_PEEKEVENT
or SDL_GETEVENT , the maximum number of events to retrieve.

action

action to take; see [[#action|Remarks]] for details.

minType

minimum value of the event type to be considered; SDL_EVENT_FIRST
is a safe choice.

maxType

maximum value of the event type to be considered; SDL_EVENT_LAST
is a safe choice.

RETURN VALUE¶

Returns the number of events actually stored or -1 on failure; call

SDL_GetError () for more information.

THREAD SAFETY¶

It is safe to call this function from any thread.

AVAILABILITY¶

This function is available since SDL 3.1.3.

SEE ALSO¶

•(3), SDL_PollEvent(3), •(3), SDL_PumpEvents(3), •(3), SDL_PushEvent(3)