From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/sound/util_mem.h | 64 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 include/sound/util_mem.h (limited to 'include/sound/util_mem.h') diff --git a/include/sound/util_mem.h b/include/sound/util_mem.h new file mode 100644 index 000000000..a1fb706b5 --- /dev/null +++ b/include/sound/util_mem.h @@ -0,0 +1,64 @@ +#ifndef __SOUND_UTIL_MEM_H +#define __SOUND_UTIL_MEM_H + +#include +/* + * Copyright (C) 2000 Takashi Iwai + * + * Generic memory management routines for soundcard memory allocation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * memory block + */ +struct snd_util_memblk { + unsigned int size; /* size of this block */ + unsigned int offset; /* zero-offset of this block */ + struct list_head list; /* link */ +}; + +#define snd_util_memblk_argptr(blk) (void*)((char*)(blk) + sizeof(struct snd_util_memblk)) + +/* + * memory management information + */ +struct snd_util_memhdr { + unsigned int size; /* size of whole data */ + struct list_head block; /* block linked-list header */ + int nblocks; /* # of allocated blocks */ + unsigned int used; /* used memory size */ + int block_extra_size; /* extra data size of chunk */ + struct mutex block_mutex; /* lock */ +}; + +/* + * prototypes + */ +struct snd_util_memhdr *snd_util_memhdr_new(int memsize); +void snd_util_memhdr_free(struct snd_util_memhdr *hdr); +struct snd_util_memblk *snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size); +int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk); +int snd_util_mem_avail(struct snd_util_memhdr *hdr); + +/* functions without mutex */ +struct snd_util_memblk *__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size); +void __snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk); +struct snd_util_memblk *__snd_util_memblk_new(struct snd_util_memhdr *hdr, + unsigned int units, + struct list_head *prev); + +#endif /* __SOUND_UTIL_MEM_H */ -- cgit v1.2.3