vm_types.h

GNU Mach 微内核源代码, 基于美国卡内基美隆大学的 Mach 研究项目

/*
 * Mach Operating System
 * Copyright (c) 1992,1991,1990,1989,1988 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  [e-mail]
 *  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.
 */
/*
 *	File:	vm_types.h
 *	Author:	Avadis Tevanian, Jr.
 *	Date: 1985
 *
 *	Header file for VM data types.  I386 version.
 */

#ifndef	_MACHINE_VM_TYPES_H_
#define _MACHINE_VM_TYPES_H_	1

#ifdef	ASSEMBLER
#else	/* ASSEMBLER */

/*
 * A natural_t is the type for the native
 * integer type, e.g. 32 or 64 or.. whatever
 * register size the machine has.  Unsigned, it is
 * used for entities that might be either
 * unsigned integers or pointers, and for
 * type-casting between the two.
 * For instance, the IPC system represents
 * a port in user space as an integer and
 * in kernel space as a pointer.
 */
typedef unsigned int	natural_t;

/*
 * An integer_t is the signed counterpart
 * of the natural_t type. Both types are
 * only supposed to be used to define
 * other types in a machine-independent
 * way.
 */
typedef int		integer_t;

#ifndef _POSIX_SOURCE

/*
 * An int32 is an integer that is at least 32 bits wide
 */
typedef int		int32;
typedef unsigned int	uint32;

#endif /* _POSIX_SOURCE */

/*
 * A vm_offset_t is a type-neutral pointer,
 * e.g. an offset into a virtual memory space.
 */
typedef	natural_t	vm_offset_t;

/*
 * A vm_size_t is the proper type for e.g.
 * expressing the difference between two
 * vm_offset_t entities.
 */
typedef	natural_t	vm_size_t;

/*
 * These types are _exactly_ as wide as indicated in their names.
 */
typedef signed char		signed8_t;
typedef signed short		signed16_t;
typedef signed long		signed32_t;
typedef signed long long	signed64_t;
typedef unsigned char		unsigned8_t;
typedef unsigned short		unsigned16_t;
typedef unsigned long		unsigned32_t;
typedef unsigned long long	unsigned64_t;
typedef float			float32_t;
typedef double			float64_t;

#endif	/* ASSEMBLER */

/*
 * If composing messages by hand (please dont)
 */

#define	MACH_MSG_TYPE_INTEGER_T	MACH_MSG_TYPE_INTEGER_32

#endif	/* _MACHINE_VM_TYPES_H_ */