osfmk/mach/i386/vm_types.h

   1 /*
   2  * Copyright (c) 2002,2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  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  Software.Distribution@CS.CMU.EDU
  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  */
  52
  53 /*
  54  *      File:   vm_types.h
  55  *      Author: Avadis Tevanian, Jr.
  56  *      Date: 1985
  57  *
  58  *      Header file for VM data types.  I386 version.
  59  */
  60
  61 #ifndef _MACH_I386_VM_TYPES_H_
  62 #define _MACH_I386_VM_TYPES_H_
  63
  64 #ifdef  ASSEMBLER
  65 #else   /* ASSEMBLER */
  66
  67 /*
  68  * A natural_t is the type for the native
  69  * integer type, e.g. 32 or 64 or.. whatever
  70  * register size the machine has.  Unsigned, it is
  71  * used for entities that might be either
  72  * unsigned integers or pointers, and for
  73  * type-casting between the two.
  74  * For instance, the IPC system represents
  75  * a port in user space as an integer and
  76  * in kernel space as a pointer.
  77  */
  78 typedef unsigned int    natural_t;
  79
  80 /*
  81  * An integer_t is the signed counterpart
  82  * of the natural_t type. Both types are
  83  * only supposed to be used to define
  84  * other types in a machine-independent
  85  * way.
  86  */
  87 typedef int             integer_t;
  88
  89 /*
  90  * A vm_offset_t is a type-neutral pointer,
  91  * e.g. an offset into a virtual memory space.
  92  */
  93 typedef natural_t       vm_offset_t;
  94
  95 /*
  96  * A vm_size_t is the proper type for e.g.
  97  * expressing the difference between two
  98  * vm_offset_t entities.
  99  */
 100 typedef natural_t       vm_size_t;
 101
 102 #endif  /* ASSEMBLER */
 103
 104 /*
 105  * If composing messages by hand (please dont)
 106  */
 107
 108 #define MACH_MSG_TYPE_INTEGER_T MACH_MSG_TYPE_INTEGER_32
 109
 110 #endif  /* _MACH_I386_VM_TYPES_H_ */