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- /* third_party/ashmem/ashmem.h
- **
- ** Copyright 2008 The Android Open Source Project
- **
- ** This file is dual licensed. It may be redistributed and/or modified
- ** under the terms of the Apache 2.0 License OR version 2 of the GNU
- ** General Public License.
- */
- #ifndef _THIRD_PARTY_ASHMEM_H
- #define _THIRD_PARTY_ASHMEM_H
- #include <stddef.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* Returns true if the ashmem device is supported on this device.
- * Not that even if the device is not supported,
- * ashmem_{create,set_prot,get_prot,get_size}_region() will still work
- * because they will use the ASharedMemory functions from libandroid.so
- * instead. But ashmem_{pin,unpin}_region() will be no-ops.
- */
- int ashmem_device_is_supported(void);
- int ashmem_create_region(const char *name, size_t size);
- int ashmem_set_prot_region(int fd, int prot);
- int ashmem_get_prot_region(int fd);
- int ashmem_pin_region(int fd, size_t offset, size_t len);
- int ashmem_unpin_region(int fd, size_t offset, size_t len);
- int ashmem_get_size_region(int fd);
- #ifdef __cplusplus
- }
- #endif
- #ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */
- #define ASHMEM_NAME_LEN 256
- #define ASHMEM_NAME_DEF "dev/ashmem"
- /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
- #define ASHMEM_NOT_PURGED 0
- #define ASHMEM_WAS_PURGED 1
- /* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
- #define ASHMEM_IS_UNPINNED 0
- #define ASHMEM_IS_PINNED 1
- #endif /* ! __ASHMEMIOC */
- #endif /* _THIRD_PARTY_ASHMEM_H */
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