2 * include/linux/ashmem.h
4 * Copyright 2008 Google Inc.
7 * This file is dual licensed. It may be redistributed and/or modified
8 * under the terms of the Apache 2.0 License OR version 2 of the GNU
9 * General Public License.
12 #ifndef _LINUX_ASHMEM_H
13 #define _LINUX_ASHMEM_H
15 #include <linux/limits.h>
16 #include <linux/ioctl.h>
18 #define ASHMEM_NAME_LEN 256
20 #define ASHMEM_NAME_DEF "dev/ashmem"
22 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
23 #define ASHMEM_NOT_PURGED 0
24 #define ASHMEM_WAS_PURGED 1
26 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
27 #define ASHMEM_IS_UNPINNED 0
28 #define ASHMEM_IS_PINNED 1
31 __u32 offset
; /* offset into region, in bytes, page-aligned */
32 __u32 len
; /* length forward from offset, in bytes, page-aligned */
35 #define __ASHMEMIOC 0x77
37 #define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
38 #define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
39 #define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
40 #define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
41 #define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
42 #define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
43 #define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
44 #define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
45 #define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
46 #define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)
48 #endif /* _LINUX_ASHMEM_H */