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/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include <stdlib.h>
#include "alMain.h"
#include "alThunk.h"
static ALenum *ThunkArray;
static ALuint ThunkArraySize;
static RWLock ThunkLock;
void ThunkInit(void)
{
RWLockInit(&ThunkLock);
ThunkArraySize = 1;
ThunkArray = calloc(1, ThunkArraySize * sizeof(*ThunkArray));
}
void ThunkExit(void)
{
free(ThunkArray);
ThunkArray = NULL;
ThunkArraySize = 0;
}
ALenum NewThunkEntry(ALuint *index)
{
ALenum *NewList;
ALuint i;
ReadLock(&ThunkLock);
for(i = 0;i < ThunkArraySize;i++)
{
if(ExchangeInt(&ThunkArray[i], AL_TRUE) == AL_FALSE)
{
ReadUnlock(&ThunkLock);
*index = i+1;
return AL_NO_ERROR;
}
}
ReadUnlock(&ThunkLock);
WriteLock(&ThunkLock);
NewList = realloc(ThunkArray, ThunkArraySize*2 * sizeof(*ThunkArray));
if(!NewList)
{
WriteUnlock(&ThunkLock);
ERR("Realloc failed to increase to %u entries!\n", ThunkArraySize*2);
return AL_OUT_OF_MEMORY;
}
memset(&NewList[ThunkArraySize], 0, ThunkArraySize*sizeof(*ThunkArray));
ThunkArraySize *= 2;
ThunkArray = NewList;
ThunkArray[i] = AL_TRUE;
WriteUnlock(&ThunkLock);
*index = i+1;
return AL_NO_ERROR;
}
void FreeThunkEntry(ALuint index)
{
ReadLock(&ThunkLock);
if(index > 0 && index <= ThunkArraySize)
ExchangeInt(&ThunkArray[index-1], AL_FALSE);
ReadUnlock(&ThunkLock);
}
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