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/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: memory_object.h
* Author: Michael Wayne Young
*
* External memory management interface definition.
*/
#ifndef _MACH_MEMORY_OBJECT_H_
#define _MACH_MEMORY_OBJECT_H_
/*
* User-visible types used in the external memory
* management interface:
*/
#include <mach/port.h>
typedef mach_port_t memory_object_t;
/* Represents a memory object ... */
/* Used by user programs to specify */
/* the object to map; used by the */
/* kernel to retrieve or store data */
typedef mach_port_t memory_object_control_t;
/* Provided to a memory manager; ... */
/* used to control a memory object */
typedef mach_port_t memory_object_name_t;
/* Used to describe the memory ... */
/* object in vm_regions() calls */
typedef int memory_object_copy_strategy_t;
/* How memory manager handles copy: */
#define MEMORY_OBJECT_COPY_NONE 0
/* ... No special support */
#define MEMORY_OBJECT_COPY_CALL 1
/* ... Make call on memory manager */
#define MEMORY_OBJECT_COPY_DELAY 2
/* ... Memory manager doesn't ... */
/* change data externally. */
#define MEMORY_OBJECT_COPY_TEMPORARY 3
/* ... Memory manager doesn't ... */
/* change data externally, and */
/* doesn't need to see changes. */
typedef int memory_object_return_t;
/* Which pages to return to manager
this time (lock_request) */
#define MEMORY_OBJECT_RETURN_NONE 0
/* ... don't return any. */
#define MEMORY_OBJECT_RETURN_DIRTY 1
/* ... only dirty pages. */
#define MEMORY_OBJECT_RETURN_ALL 2
/* ... dirty and precious pages. */
#define MEMORY_OBJECT_NULL MACH_PORT_NULL
#endif /* _MACH_MEMORY_OBJECT_H_ */
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