projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __SOUND_UTIL_MEM_H |
| 2 | #define __SOUND_UTIL_MEM_H | |
| ef9f0a42 IM |
3 | |
| 4 | #include <linux/mutex.h> | |
| 1da177e4 LT |
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 | ||
| 1da177e4 LT |
25 | /* |
| 26 | * memory block | |
| 27 | */ | |
| 28 | struct snd_util_memblk { | |
| 03da312a TI |
29 | unsigned int size; /* size of this block */ |
| 30 | unsigned int offset; /* zero-offset of this block */ | |
| 1da177e4 LT |
31 | struct list_head list; /* link */ |
| 32 | }; | |
| 33 | ||
| 03da312a | 34 | #define snd_util_memblk_argptr(blk) (void*)((char*)(blk) + sizeof(struct snd_util_memblk)) |
| 1da177e4 LT |
35 | |
| 36 | /* | |
| 37 | * memory management information | |
| 38 | */ | |
| 39 | struct snd_util_memhdr { | |
| 03da312a | 40 | unsigned int size; /* size of whole data */ |
| 1da177e4 LT |
41 | struct list_head block; /* block linked-list header */ |
| 42 | int nblocks; /* # of allocated blocks */ | |
| 03da312a | 43 | unsigned int used; /* used memory size */ |
| 1da177e4 | 44 | int block_extra_size; /* extra data size of chunk */ |
| ef9f0a42 | 45 | struct mutex block_mutex; /* lock */ |
| 1da177e4 LT |
46 | }; |
| 47 | ||
| 48 | /* | |
| 49 | * prototypes | |
| 50 | */ | |
| 03da312a TI |
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); | |
| 1da177e4 LT |
56 | |
| 57 | /* functions without mutex */ | |
| 03da312a TI |
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, | |
| 61 | unsigned int units, | |
| 62 | struct list_head *prev); | |
| 1da177e4 LT |
63 | |
| 64 | #endif /* __SOUND_UTIL_MEM_H */ |