michael@0: /*
michael@0:  * Copyright 2008 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef _CUTILS_ASHMEM_H
michael@0: #define _CUTILS_ASHMEM_H
michael@0: 
michael@0: #include <stddef.h>
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: extern "C" {
michael@0: #endif
michael@0: 
michael@0: int ashmem_create_region(const char *name, size_t size);
michael@0: int ashmem_set_prot_region(int fd, int prot);
michael@0: 
michael@0: /**
michael@0:  *   @return ASHMEM_NOT_PURGED if the memory was not purged.
michael@0:  *           ASHMEM_WAS_PURGED if the memory was purged.
michael@0:  *           -1 on error.
michael@0:  */
michael@0: int ashmem_pin_region(int fd, size_t offset, size_t len);
michael@0: int ashmem_unpin_region(int fd, size_t offset, size_t len);
michael@0: int ashmem_get_size_region(int fd);
michael@0: int ashmem_purge_all_caches(int fd);
michael@0: 
michael@0: #ifdef __cplusplus
michael@0: }
michael@0: #endif
michael@0: 
michael@0: #ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */
michael@0: 
michael@0: #define ASHMEM_NAME_LEN     256
michael@0: 
michael@0: #define ASHMEM_NAME_DEF     "dev/ashmem"
michael@0: 
michael@0: /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
michael@0: #define ASHMEM_NOT_PURGED   0
michael@0: #define ASHMEM_WAS_PURGED   1
michael@0: 
michael@0: /* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
michael@0: #define ASHMEM_IS_UNPINNED  0
michael@0: #define ASHMEM_IS_PINNED    1
michael@0: 
michael@0: #endif  /* ! __ASHMEMIOC */
michael@0: 
michael@0: #endif  /* _CUTILS_ASHMEM_H */