xref: /system/core/include/cutils/ashmem.h

/* cutils/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 _CUTILS_ASHMEM_H
#define _CUTILS_ASHMEM_H

#ifdef __cplusplus
extern "C" {
#endif

int ashmem_create_region(const char *name, size_t size);
int ashmem_set_prot_region(int fd, int prot);
int ashmem_pin_region(int fd, size_t offset, size_t len);
int ashmem_unpin_region(int fd, size_t offset, size_t len);

#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	/* _CUTILS_ASHMEM_H */