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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"
typedef struct {
ALvoid *ptr;
ALboolean InUse;
} ThunkEntry;
static ThunkEntry *g_ThunkArray;
static ALuint g_ThunkArraySize;
static CRITICAL_SECTION g_ThunkLock;
void alThunkInit(void)
{
InitializeCriticalSection(&g_ThunkLock);
g_ThunkArraySize = 1;
g_ThunkArray = calloc(1, g_ThunkArraySize * sizeof(ThunkEntry));
}
void alThunkExit(void)
{
free(g_ThunkArray);
g_ThunkArray = NULL;
g_ThunkArraySize = 0;
DeleteCriticalSection(&g_ThunkLock);
}
ALenum alThunkAddEntry(ALvoid *ptr, ALuint *idx)
{
ALuint index;
EnterCriticalSection(&g_ThunkLock);
for(index = 0;index < g_ThunkArraySize;index++)
{
if(g_ThunkArray[index].InUse == AL_FALSE)
break;
}
if(index == g_ThunkArraySize)
{
ThunkEntry *NewList;
NewList = realloc(g_ThunkArray, g_ThunkArraySize*2 * sizeof(ThunkEntry));
if(!NewList)
{
LeaveCriticalSection(&g_ThunkLock);
AL_PRINT("Realloc failed to increase to %u enties!\n", g_ThunkArraySize*2);
return AL_OUT_OF_MEMORY;
}
memset(&NewList[g_ThunkArraySize], 0, g_ThunkArraySize*sizeof(ThunkEntry));
g_ThunkArraySize *= 2;
g_ThunkArray = NewList;
}
g_ThunkArray[index].ptr = ptr;
g_ThunkArray[index].InUse = AL_TRUE;
*idx = index+1;
LeaveCriticalSection(&g_ThunkLock);
return AL_NO_ERROR;
}
void alThunkRemoveEntry(ALuint index)
{
EnterCriticalSection(&g_ThunkLock);
if(index > 0 && index <= g_ThunkArraySize)
g_ThunkArray[index-1].InUse = AL_FALSE;
LeaveCriticalSection(&g_ThunkLock);
}
ALvoid *alThunkLookupEntry(ALuint index)
{
ALvoid *ptr = NULL;
EnterCriticalSection(&g_ThunkLock);
if(index > 0 && index <= g_ThunkArraySize)
ptr = g_ThunkArray[index-1].ptr;
LeaveCriticalSection(&g_ThunkLock);
return ptr;
}
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