1/*
2 * Copyright 2008 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef _CUTILS_ASHMEM_H
9#define _CUTILS_ASHMEM_H
10
11#include <stddef.h>
12
13#ifdef __cplusplus
14extern "C" {
15#endif
16
17int ashmem_create_region(const char *name, size_t size);
18int ashmem_set_prot_region(int fd, int prot);
19int ashmem_pin_region(int fd, size_t offset, size_t len);
20int ashmem_unpin_region(int fd, size_t offset, size_t len);
21int ashmem_get_size_region(int fd);
22int ashmem_purge_all_caches(int fd);
23
24#ifdef __cplusplus
25}
26#endif
27
28#ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */
29
30#define ASHMEM_NAME_LEN     256
31
32#define ASHMEM_NAME_DEF     "dev/ashmem"
33
34/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
35#define ASHMEM_NOT_PURGED   0
36#define ASHMEM_WAS_PURGED   1
37
38/* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
39#define ASHMEM_IS_UNPINNED  0
40#define ASHMEM_IS_PINNED    1
41
42#endif  /* ! __ASHMEMIOC */
43
44#endif  /* _CUTILS_ASHMEM_H */
45