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 14 extern "C" { 15 #endif 16 17 int ashmem_create_region(const char *name, size_t size); 18 int ashmem_set_prot_region(int fd, int prot); 19 20 /** 21 * @return ASHMEM_NOT_PURGED if the memory was not purged. 22 * ASHMEM_WAS_PURGED if the memory was purged. 23 * -1 on error. 24 */ 25 int ashmem_pin_region(int fd, size_t offset, size_t len); 26 int ashmem_unpin_region(int fd, size_t offset, size_t len); 27 int ashmem_get_size_region(int fd); 28 int ashmem_purge_all_caches(int fd); 29 30 #ifdef __cplusplus 31 } 32 #endif 33 34 #ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */ 35 36 #define ASHMEM_NAME_LEN 256 37 38 #define ASHMEM_NAME_DEF "dev/ashmem" 39 40 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */ 41 #define ASHMEM_NOT_PURGED 0 42 #define ASHMEM_WAS_PURGED 1 43 44 /* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */ 45 #define ASHMEM_IS_UNPINNED 0 46 #define ASHMEM_IS_PINNED 1 47 48 #endif /* ! __ASHMEMIOC */ 49 50 #endif /* _CUTILS_ASHMEM_H */ 51