/* SPDX-License-Identifier: GPL-2.0-or-later */#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 */ /* * 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 */