event.c
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/*====================================================================
* event.c
*
* Copyright 1993, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
* Inc.; the contents of this file may not be disclosed to third
* parties, copied or duplicated in any form, in whole or in part,
* without the prior written permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to
* restrictions as set forth in subdivision (c)(1)(ii) of the Rights
* in Technical Data and Computer Software clause at DFARS
* 252.227-7013, and/or in similar or successor clauses in the FAR,
* DOD or NASA FAR Supplement. Unpublished - rights reserved under the
* Copyright Laws of the United States.
*====================================================================*/
#include <libaudio.h>
void alEvtqNew(ALEventQueue *evtq, ALEventListItem *items, int itemCount)
{
int i;
evtq->eventCount = 0;
evtq->allocList.next = 0;
evtq->allocList.prev = 0;
evtq->freeList.next = 0;
evtq->freeList.prev = 0;
for (i = 0; i < itemCount; i++) {
alLink((ALLink *)&items[i], &evtq->freeList);
}
}
ALMicroTime alEvtqNextEvent(ALEventQueue *evtq, ALEvent *evt)
{
ALEventListItem *item;
item = (ALEventListItem *)evtq->allocList.next;
if (item) {
alUnlink((ALLink *)item);
alCopy(&item->evt, evt, sizeof(*evt));
alLink((ALLink *)item, &evtq->freeList);
} else {
evt->type = -1;
}
return item->delta;
}
void alEvtqPostEvent(ALEventQueue *evtq, ALEvent *evt, ALMicroTime delta)
{
ALEventListItem *item;
ALEventListItem *nextItem;
ALLink *node;
item = (ALEventListItem *)evtq->freeList.next;
if (!item) {
emPrintf("error: out of free events!\n");
return;
}
alUnlink((ALLink *)item);
alCopy(evt, &item->evt, sizeof(*evt));
for (node = &evtq->allocList; node != 0; node = node->next) {
if (!node->next) { /* end of the list */
item->delta = delta;
alLink((ALLink *)item, node);
break;
} else {
nextItem = (ALEventListItem *)node->next;
if (delta < nextItem->delta) {
item->delta = delta;
nextItem->delta -= delta;
alLink((ALLink *)item, node);
break;
}
delta -= nextItem->delta;
}
}
}