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  */
  23 enum 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
  29 struct zs_pool;
  30
  31 struct zs_pool *zs_create_pool(gfp_t flags);
  32 void zs_destroy_pool(struct zs_pool *pool);
  33
  34 unsigned long zs_malloc(struct zs_pool *pool, size_t size);
  35 void zs_free(struct zs_pool *pool, unsigned long obj);
  36
  37 void *zs_map_object(struct zs_pool *pool, unsigned long handle,
  38                         enum zs_mapmode mm);
  39 void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
  40
  41 u64 zs_get_total_size_bytes(struct zs_pool *pool);
  42
  43 #endif