cutils/ashmem.h

   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
  16 extern "C" {
  17 #endif
  18
  19 int ashmem_create_region(const char *name, size_t size);
  20 int ashmem_set_prot_region(int fd, int prot);
  21 int ashmem_pin_region(int fd, size_t offset, size_t len);
  22 int ashmem_unpin_region(int fd, size_t offset, size_t len);
  23 int 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 */