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comparison OpenAL32/alThunk.c @ 0:f9476ff7637e

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initial forking of open-al to create multiple listeners
author Robert McIntyre <rlm@mit.edu>
date Tue, 25 Oct 2011 13:02:31 -0700
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-1:000000000000 0:f9476ff7637e
1 /**
2 * OpenAL cross platform audio library
3 * Copyright (C) 1999-2007 by authors.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 * Or go to http://www.gnu.org/copyleft/lgpl.html
19 */
20
21 #include "config.h"
22
23 #include <stdlib.h>
24
25 #include "alMain.h"
26 #include "alThunk.h"
27
28
29 static ALboolean *ThunkArray;
30 static ALuint ThunkArraySize;
31
32 static CRITICAL_SECTION ThunkLock;
33
34 void ThunkInit(void)
35 {
36 InitializeCriticalSection(&ThunkLock);
37 ThunkArraySize = 1;
38 ThunkArray = calloc(1, ThunkArraySize * sizeof(*ThunkArray));
39 }
40
41 void ThunkExit(void)
42 {
43 free(ThunkArray);
44 ThunkArray = NULL;
45 ThunkArraySize = 0;
46 DeleteCriticalSection(&ThunkLock);
47 }
48
49 ALenum NewThunkEntry(ALuint *index)
50 {
51 ALuint i;
52
53 EnterCriticalSection(&ThunkLock);
54
55 for(i = 0;i < ThunkArraySize;i++)
56 {
57 if(ThunkArray[i] == AL_FALSE)
58 break;
59 }
60
61 if(i == ThunkArraySize)
62 {
63 ALboolean *NewList;
64
65 NewList = realloc(ThunkArray, ThunkArraySize*2 * sizeof(*ThunkArray));
66 if(!NewList)
67 {
68 LeaveCriticalSection(&ThunkLock);
69 ERR("Realloc failed to increase to %u enties!\n", ThunkArraySize*2);
70 return AL_OUT_OF_MEMORY;
71 }
72 memset(&NewList[ThunkArraySize], 0, ThunkArraySize*sizeof(*ThunkArray));
73 ThunkArraySize *= 2;
74 ThunkArray = NewList;
75 }
76
77 ThunkArray[i] = AL_TRUE;
78 *index = i+1;
79
80 LeaveCriticalSection(&ThunkLock);
81
82 return AL_NO_ERROR;
83 }
84
85 void FreeThunkEntry(ALuint index)
86 {
87 EnterCriticalSection(&ThunkLock);
88
89 if(index > 0 && index <= ThunkArraySize)
90 ThunkArray[index-1] = AL_FALSE;
91
92 LeaveCriticalSection(&ThunkLock);
93 }