NAME

ANextEvent − dequeue and return first event in audio event queue

SYNOPSIS

void
ANextEvent (

Audio ∗ audio,

AEvent ∗ event_return,

long ∗ status_return);

DESCRIPTION

ANextEvent() dequeues and returns the first event in the audio event queue. If no match is found, the function blocks until an event is received.  (This behavior is unlike ACheckEvent() and ACheckMaskEvent() which do not block if there is no event or matching event, respectively.) 

audio specifies the Audio structure associated with this connection. 

event_return is the first event found in the queue. 

status_return receives the returned status of the operation, unless it is set to NULL. 

ERRORS

If status_return is not set to NULL, one of the following is returned in status_return:

0 AENoError

2 AEBadAudio

EXAMPLE

The following example sets up event_return to receive event data and status_return to receive an error status. 

Audio ∗ audio;  /∗ audio connection ∗/

AEvent event_return;  /∗ event return ∗/

long status;  /∗ error status ∗/
.
.
.

/∗ check event queue ∗/

ANextEvent(audio, &event_return, &status);

DEPENDENCIES

This function belongs to the Audio Library of functions that manage connections to an audio server.  The audio server must run on a system that has audio hardware. To find out whether or not your system has audio hardware, refer to the hardware manual that accompanies your system. 

AUTHOR

ANextEvent() was developed by HP. 

SEE ALSO

ACheckEvent(3X), ACheckMaskEvent(3X), AEventsQueued(3X), AMaskEvent(3X), APeekEvent(3X), APutBackEvent(3X), AQlength(3X), ASelectInput(3X). 

Using the Audio Application Program Interface.

Hewlett-Packard Company  —  HP-UX Release 8.07: November 1991