ashmem.h revision 7be52b1a0e052635b361f9d8c186adbbcc981b7e 
1/* cutils/ashmem.h
2 **
3 ** Copyright 2008 The Android Open Source Project
4 **
5 ** This file is dual licensed.  It may be redistributed and/or modified
6 ** under the terms of the Apache 2.0 License OR version 2 of the GNU
7 ** General Public License.
8 */
9
10#ifndef _CUTILS_ASHMEM_H
11#define _CUTILS_ASHMEM_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);
22
23#ifdef __cplusplus
24}
25#endif
26
27#ifndef __ASHMEMIOC	/* in case someone included <linux/ashmem.h> too */
28
29#define ASHMEM_NAME_LEN		256
30
31#define ASHMEM_NAME_DEF		"dev/ashmem"
32
33/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
34#define ASHMEM_NOT_PURGED	0
35#define ASHMEM_WAS_PURGED	1
36
37/* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
38#define ASHMEM_IS_UNPINNED	0
39#define ASHMEM_IS_PINNED	1
40
41#endif	/* ! __ASHMEMIOC */
42
43#endif	/* _CUTILS_ASHMEM_H */
44