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Annotation of kernel/mach/memory_object.h, revision 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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