Root/drivers/staging/zsmalloc/zsmalloc.h

1/*
2 * zsmalloc memory allocator
3 *
4 * Copyright (C) 2011 Nitin Gupta
5 *
6 * This code is released using a dual license strategy: BSD/GPL
7 * You can choose the license that better fits your requirements.
8 *
9 * Released under the terms of 3-clause BSD License
10 * Released under the terms of GNU General Public License Version 2.0
11 */
12
13#ifndef _ZS_MALLOC_H_
14#define _ZS_MALLOC_H_
15
16#include <linux/types.h>
17
18/*
19 * zsmalloc mapping modes
20 *
21 * NOTE: These only make a difference when a mapped object spans pages
22*/
23enum zs_mapmode {
24    ZS_MM_RW, /* normal read-write mapping */
25    ZS_MM_RO, /* read-only (no copy-out at unmap time) */
26    ZS_MM_WO /* write-only (no copy-in at map time) */
27};
28
29struct zs_pool;
30
31struct zs_pool *zs_create_pool(const char *name, gfp_t flags);
32void zs_destroy_pool(struct zs_pool *pool);
33
34unsigned long zs_malloc(struct zs_pool *pool, size_t size);
35void zs_free(struct zs_pool *pool, unsigned long obj);
36
37void *zs_map_object(struct zs_pool *pool, unsigned long handle,
38            enum zs_mapmode mm);
39void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
40
41u64 zs_get_total_size_bytes(struct zs_pool *pool);
42
43#endif
44

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