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Annotation of kernel/mach/memory_object.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     24: 
                     25: /* 
                     26:  * Mach Operating System
                     27:  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
                     28:  * All Rights Reserved.
                     29:  * 
                     30:  * Permission to use, copy, modify and distribute this software and its
                     31:  * documentation is hereby granted, provided that both the copyright
                     32:  * notice and this permission notice appear in all copies of the
                     33:  * software, derivative works or modified versions, and any portions
                     34:  * thereof, and that both notices appear in supporting documentation.
                     35:  * 
                     36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     39:  * 
                     40:  * Carnegie Mellon requests users of this software to return to
                     41:  * 
                     42:  *  Software Distribution Coordinator  or  [email protected]
                     43:  *  School of Computer Science
                     44:  *  Carnegie Mellon University
                     45:  *  Pittsburgh PA 15213-3890
                     46:  * 
                     47:  * any improvements or extensions that they make and grant Carnegie Mellon
                     48:  * the rights to redistribute these changes.
                     49:  */
                     50: /*
                     51:  *     File:   memory_object.h
                     52:  *     Author: Michael Wayne Young
                     53:  *
                     54:  *     External memory management interface definition.
                     55:  */
                     56: 
                     57: #ifndef        _MACH_MEMORY_OBJECT_H_
                     58: #define _MACH_MEMORY_OBJECT_H_
                     59: 
                     60: /*
                     61:  *     User-visible types used in the external memory
                     62:  *     management interface:
                     63:  */
                     64: 
                     65: #import <mach/port.h>
                     66: 
                     67: typedef        mach_port_t     memory_object_t;
                     68:                                        /* Represents a memory object ... */
                     69:                                        /*  Used by user programs to specify */
                     70:                                        /*  the object to map; used by the */
                     71:                                        /*  kernel to retrieve or store data */
                     72: 
                     73: typedef        mach_port_t     memory_object_control_t;
                     74:                                        /* Provided to a memory manager; ... */
                     75:                                        /*  used to control a memory object */
                     76: 
                     77: typedef        mach_port_t     memory_object_name_t;
                     78:                                        /* Used to describe the memory ... */
                     79:                                        /*  object in vm_regions() calls */
                     80: 
                     81: typedef        int             memory_object_copy_strategy_t;
                     82:                                        /* How memory manager handles copy: */
                     83: #define                MEMORY_OBJECT_COPY_NONE         0
                     84:                                        /* ... No special support */
                     85: #define                MEMORY_OBJECT_COPY_CALL         1
                     86:                                        /* ... Make call on memory manager */
                     87: #define                MEMORY_OBJECT_COPY_DELAY        2
                     88:                                        /* ... Memory manager doesn't ... */
                     89:                                        /*     change data externally. */
                     90: #define                MEMORY_OBJECT_COPY_TEMPORARY    3
                     91:                                        /* ... Memory manager doesn't ... */
                     92:                                        /*     change data externally, and */
                     93:                                        /*     doesn't need to see changes. */
                     94: 
                     95: typedef        int             memory_object_return_t;
                     96:                                        /* Which pages to return to manager
                     97:                                           this time (lock_request) */
                     98: #define                MEMORY_OBJECT_RETURN_NONE       0
                     99:                                        /* ... don't return any. */
                    100: #define                MEMORY_OBJECT_RETURN_DIRTY      1
                    101:                                        /* ... only dirty pages. */
                    102: #define                MEMORY_OBJECT_RETURN_ALL        2
                    103:                                        /* ... dirty and precious pages. */
                    104: 
                    105: #define                MEMORY_OBJECT_NULL      MACH_PORT_NULL
                    106: 
                    107: #endif /* _MACH_MEMORY_OBJECT_H_ */

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