#ifndef __SOUND_UTIL_MEM_H #define __SOUND_UTIL_MEM_H #include <linux/mutex.h> /* * Copyright (C) 2000 Takashi Iwai <tiwai@suse.de> * * 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 */