ashmem.h revision 9f6d28dc454e053ddcfe21879e4575ac86654050
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#include <stddef.h> 14 15#ifdef __cplusplus 16extern "C" { 17#endif 18 19int ashmem_create_region(const char *name, size_t size); 20int ashmem_set_prot_region(int fd, int prot); 21int ashmem_pin_region(int fd, size_t offset, size_t len); 22int ashmem_unpin_region(int fd, size_t offset, size_t len); 23int ashmem_get_size_region(int fd); 24 25#ifdef __cplusplus 26} 27#endif 28 29#ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */ 30 31#define ASHMEM_NAME_LEN 256 32 33#define ASHMEM_NAME_DEF "dev/ashmem" 34 35/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */ 36#define ASHMEM_NOT_PURGED 0 37#define ASHMEM_WAS_PURGED 1 38 39/* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */ 40#define ASHMEM_IS_UNPINNED 0 41#define ASHMEM_IS_PINNED 1 42 43#endif /* ! __ASHMEMIOC */ 44 45#endif /* _CUTILS_ASHMEM_H */ 46