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util_mem.h
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1 #ifndef __SOUND_UTIL_MEM_H
2 #define __SOUND_UTIL_MEM_H
3 
4 #include <linux/mutex.h>
5 /*
6  * Copyright (C) 2000 Takashi Iwai <[email protected]>
7  *
8  * Generic memory management routines for soundcard memory allocation
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23  */
24 
25 /*
26  * memory block
27  */
29  unsigned int size; /* size of this block */
30  unsigned int offset; /* zero-offset of this block */
31  struct list_head list; /* link */
32 };
33 
34 #define snd_util_memblk_argptr(blk) (void*)((char*)(blk) + sizeof(struct snd_util_memblk))
35 
36 /*
37  * memory management information
38  */
40  unsigned int size; /* size of whole data */
41  struct list_head block; /* block linked-list header */
42  int nblocks; /* # of allocated blocks */
43  unsigned int used; /* used memory size */
44  int block_extra_size; /* extra data size of chunk */
45  struct mutex block_mutex; /* lock */
46 };
47 
48 /*
49  * prototypes
50  */
56 
57 /* functions without mutex */
61  unsigned int units,
62  struct list_head *prev);
63 
64 #endif /* __SOUND_UTIL_MEM_H */