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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/sound/util_mem.h
1 #ifndef __SOUND_UTIL_MEM_H
2 #define __SOUND_UTIL_MEM_H
4 #include <linux/mutex.h>
6 * Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
8 * Generic memory management routines for soundcard memory allocation
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.
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.
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
28 struct snd_util_memblk
{
29 unsigned int size
; /* size of this block */
30 unsigned int offset
; /* zero-offset of this block */
31 struct list_head list
; /* link */
34 #define snd_util_memblk_argptr(blk) (void*)((char*)(blk) + sizeof(struct snd_util_memblk))
37 * memory management information
39 struct snd_util_memhdr
{
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 */
51 struct snd_util_memhdr
*snd_util_memhdr_new(int memsize
);
52 void snd_util_memhdr_free(struct snd_util_memhdr
*hdr
);
53 struct snd_util_memblk
*snd_util_mem_alloc(struct snd_util_memhdr
*hdr
, int size
);
54 int snd_util_mem_free(struct snd_util_memhdr
*hdr
, struct snd_util_memblk
*blk
);
55 int snd_util_mem_avail(struct snd_util_memhdr
*hdr
);
57 /* functions without mutex */
58 struct snd_util_memblk
*__snd_util_mem_alloc(struct snd_util_memhdr
*hdr
, int size
);
59 void __snd_util_mem_free(struct snd_util_memhdr
*hdr
, struct snd_util_memblk
*blk
);
60 struct snd_util_memblk
*__snd_util_memblk_new(struct snd_util_memhdr
*hdr
,
62 struct list_head
*prev
);
64 #endif /* __SOUND_UTIL_MEM_H */