/* 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

#include <stddef.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);
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

#if LINUX_ENABLED

#include <linux/limits.h>
#include <linux/ioctl.h>
#include <linux/types.h>

struct ashmem_pin {
    __u32 offset;
    __u32 len;
};

#define __ASHMEMIOC 0x77

#define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
#define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
#define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
#define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
#define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
#define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
#define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
#define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
#define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
#define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)

#endif	/* LINUX_ENABLED */

#endif	/* ! __ASHMEMIOC */

#endif	/* _CUTILS_ASHMEM_H */