1 files changed, 64 insertions, 0 deletions

diff --git a/include/sound/util_mem.h b/include/sound/util_mem.h
new file mode 100644
index 000000000000..9d2cdfa0c42a
--- /dev/null
+++ b/include/sound/util_mem.h
@@ -0,0 +1,64 @@
+#ifndef __SOUND_UTIL_MEM_H
+#define __SOUND_UTIL_MEM_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
+ */
+
+typedef struct snd_util_memblk snd_util_memblk_t;
+typedef struct snd_util_memhdr snd_util_memhdr_t;
+typedef unsigned int snd_util_unit_t;
+
+/*
+ * memory block
+ */
+struct snd_util_memblk {
+        snd_util_unit_t size;           /* size of this block */
+        snd_util_unit_t offset;         /* zero-offset of this block */
+        struct list_head list;          /* link */
+};
+
+#define snd_util_memblk_argptr(blk)     (void*)((char*)(blk) + sizeof(snd_util_memblk_t))
+
+/*
+ * memory management information
+ */
+struct snd_util_memhdr {
+        snd_util_unit_t size;           /* size of whole data */
+        struct list_head block;         /* block linked-list header */
+        int nblocks;                    /* # of allocated blocks */
+        snd_util_unit_t used;           /* used memory size */
+        int block_extra_size;           /* extra data size of chunk */
+        struct semaphore block_mutex;   /* lock */
+};
+
+/*
+ * prototypes
+ */
+snd_util_memhdr_t *snd_util_memhdr_new(int memsize);
+void snd_util_memhdr_free(snd_util_memhdr_t *hdr);
+snd_util_memblk_t *snd_util_mem_alloc(snd_util_memhdr_t *hdr, int size);
+int snd_util_mem_free(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk);
+int snd_util_mem_avail(snd_util_memhdr_t *hdr);
+
+/* functions without mutex */
+snd_util_memblk_t *__snd_util_mem_alloc(snd_util_memhdr_t *hdr, int size);
+void __snd_util_mem_free(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk);
+snd_util_memblk_t *__snd_util_memblk_new(snd_util_memhdr_t *hdr, snd_util_unit_t units, struct list_head *prev);
+
+#endif /* __SOUND_UTIL_MEM_H */