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Annotation of OSKit-Mach/include/mach/memory_object.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  *     File:   memory_object.h
        !            28:  *     Author: Michael Wayne Young
        !            29:  *
        !            30:  *     External memory management interface definition.
        !            31:  */
        !            32: 
        !            33: #ifndef        _MACH_MEMORY_OBJECT_H_
        !            34: #define _MACH_MEMORY_OBJECT_H_
        !            35: 
        !            36: /*
        !            37:  *     User-visible types used in the external memory
        !            38:  *     management interface:
        !            39:  */
        !            40: 
        !            41: #include <mach/port.h>
        !            42: 
        !            43: typedef        mach_port_t     memory_object_t;
        !            44:                                        /* Represents a memory object ... */
        !            45:                                        /*  Used by user programs to specify */
        !            46:                                        /*  the object to map; used by the */
        !            47:                                        /*  kernel to retrieve or store data */
        !            48: 
        !            49: typedef        mach_port_t     memory_object_control_t;
        !            50:                                        /* Provided to a memory manager; ... */
        !            51:                                        /*  used to control a memory object */
        !            52: 
        !            53: typedef        mach_port_t     memory_object_name_t;
        !            54:                                        /* Used to describe the memory ... */
        !            55:                                        /*  object in vm_regions() calls */
        !            56: 
        !            57: typedef        int             memory_object_copy_strategy_t;
        !            58:                                        /* How memory manager handles copy: */
        !            59: #define                MEMORY_OBJECT_COPY_NONE         0
        !            60:                                        /* ... No special support */
        !            61: #define                MEMORY_OBJECT_COPY_CALL         1
        !            62:                                        /* ... Make call on memory manager */
        !            63: #define                MEMORY_OBJECT_COPY_DELAY        2
        !            64:                                        /* ... Memory manager doesn't ... */
        !            65:                                        /*     change data externally. */
        !            66: #define                MEMORY_OBJECT_COPY_TEMPORARY    3
        !            67:                                        /* ... Memory manager doesn't ... */
        !            68:                                        /*     change data externally, and */
        !            69:                                        /*     doesn't need to see changes. */
        !            70: 
        !            71: typedef        int             memory_object_return_t;
        !            72:                                        /* Which pages to return to manager
        !            73:                                           this time (lock_request) */
        !            74: #define                MEMORY_OBJECT_RETURN_NONE       0
        !            75:                                        /* ... don't return any. */
        !            76: #define                MEMORY_OBJECT_RETURN_DIRTY      1
        !            77:                                        /* ... only dirty pages. */
        !            78: #define                MEMORY_OBJECT_RETURN_ALL        2
        !            79:                                        /* ... dirty and precious pages. */
        !            80: 
        !            81: #define                MEMORY_OBJECT_NULL      MACH_PORT_NULL
        !            82: 
        !            83: #endif /* _MACH_MEMORY_OBJECT_H_ */

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