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memory_object.h
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1997-04-27
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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.
*/
/*
* HISTORY
* $Log: memory_object.h,v $
* Revision 2.9 93/01/14 17:44:47 danner
* Cleanup.
* [92/06/10 pds]
*
* Revision 2.8 92/05/21 17:22:24 jfriedl
* Removed coment starter from within comments to shut up gcc warnings.
* [92/05/16 jfriedl]
*
* Revision 2.7 92/03/10 16:27:05 jsb
* Added MEMORY_OBJECT_COPY_TEMPORARY.
* [92/02/11 07:56:35 jsb]
*
* Revision 2.6 91/08/28 11:15:22 jsb
* Add defs for memory_object_return_t.
* [91/07/03 14:06:26 dlb]
*
* Revision 2.5 91/05/18 14:35:05 rpd
* Removed memory_manager_default.
* [91/03/22 rpd]
*
* Revision 2.4 91/05/14 16:55:55 mrt
* Correcting copyright
*
* Revision 2.3 91/02/05 17:34:01 mrt
* Changed to new Mach copyright
* [91/02/01 17:19:11 mrt]
*
* Revision 2.2 90/06/02 14:58:56 rpd
* Converted to new IPC.
* [90/03/26 22:35:26 rpd]
*
* Revision 2.1 89/08/03 16:02:52 rwd
* Created.
*
* Revision 2.5 89/02/25 18:38:23 gm0w
* Changes for cleanup.
*
* Revision 2.4 89/02/07 00:54:07 mwyoung
* Relocated from vm/memory_object.h
*
* Revision 2.3 89/01/30 22:08:42 rpd
* Updated includes to the new style. Fixed log.
* Made variable declarations use "extern".
* [89/01/25 15:25:20 rpd]
*/
/*
* 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:
*/
#import <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_ */