1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/**
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include <stdlib.h>
#include "alMain.h"
#include "alThunk.h"
#include "almalloc.h"
static ATOMIC(ALenum) *ThunkArray;
static ALuint ThunkArraySize;
static RWLock ThunkLock;
void ThunkInit(void)
{
RWLockInit(&ThunkLock);
ThunkArraySize = 1;
ThunkArray = al_calloc(16, ThunkArraySize * sizeof(*ThunkArray));
}
void ThunkExit(void)
{
al_free(ThunkArray);
ThunkArray = NULL;
ThunkArraySize = 0;
}
ALenum NewThunkEntry(ALuint *index)
{
void *NewList;
ALuint i;
ReadLock(&ThunkLock);
for(i = 0;i < ThunkArraySize;i++)
{
if(ATOMIC_EXCHANGE(ALenum, &ThunkArray[i], AL_TRUE) == AL_FALSE)
{
ReadUnlock(&ThunkLock);
*index = i+1;
return AL_NO_ERROR;
}
}
ReadUnlock(&ThunkLock);
WriteLock(&ThunkLock);
/* Double-check that there's still no free entries, in case another
* invocation just came through and increased the size of the array.
*/
for(;i < ThunkArraySize;i++)
{
if(ATOMIC_EXCHANGE(ALenum, &ThunkArray[i], AL_TRUE) == AL_FALSE)
{
WriteUnlock(&ThunkLock);
*index = i+1;
return AL_NO_ERROR;
}
}
NewList = al_calloc(16, ThunkArraySize*2 * sizeof(*ThunkArray));
if(!NewList)
{
WriteUnlock(&ThunkLock);
ERR("Realloc failed to increase to %u entries!\n", ThunkArraySize*2);
return AL_OUT_OF_MEMORY;
}
memcpy(NewList, ThunkArray, ThunkArraySize*sizeof(*ThunkArray));
al_free(ThunkArray);
ThunkArray = NewList;
ThunkArraySize *= 2;
ATOMIC_STORE(&ThunkArray[i], AL_TRUE);
WriteUnlock(&ThunkLock);
*index = i+1;
return AL_NO_ERROR;
}
void FreeThunkEntry(ALuint index)
{
ReadLock(&ThunkLock);
if(index > 0 && index <= ThunkArraySize)
ATOMIC_STORE(&ThunkArray[index-1], AL_FALSE);
ReadUnlock(&ThunkLock);
}
|
