Source to mach/error.h

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Copyright (c) 1995, 1994, 1993, 1992, 1991, 1990  
 * Open Software Foundation, Inc. 
 *  
 * Permission to use, copy, modify, and distribute this software and 
 * its documentation for any purpose and without fee is hereby granted, 
 * provided that the above copyright notice appears in all copies and 
 * that both the copyright notice and this permission notice appear in 
 * supporting documentation, and that the name of ("OSF") or Open Software 
 * Foundation not be used in advertising or publicity pertaining to 
 * distribution of the software without specific, written prior permission. 
 *  
 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 * FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL OSF BE LIABLE FOR ANY 
 * SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN 
 * ACTION OF CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING 
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE 
 */
/*
 * OSF Research Institute MK6.1 (unencumbered) 1/31/1995
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 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  [email protected]
 *  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:	mach/error.h
 * Purpose:
 *	error module definitions
 *
 */

#ifndef	_MACH_ERROR_H_
#define _MACH_ERROR_H_
#include <mach/kern_return.h>

/*
 *	error number layout as follows:
 *
 *	hi		 		       lo
 *	| system(6) | subsystem(12) | code(14) |
 */


#define	err_none		(mach_error_t)0
#define ERR_SUCCESS		(mach_error_t)0
#define	ERR_ROUTINE_NIL		(mach_error_fn_t)0


#define	err_system(x)		(((x)&0x3f)<<26)
#define err_sub(x)		(((x)&0xfff)<<14)

#define err_get_system(err)	(((err)>>26)&0x3f)
#define err_get_sub(err)	(((err)>>14)&0xfff)
#define err_get_code(err)	((err)&0x3fff)

#define system_emask		(err_system(0x3f))
#define sub_emask		(err_sub(0xfff))
#define code_emask		(0x3fff)


/*	major error systems	*/
#define	err_kern		err_system(0x0)		/* kernel */
#define	err_us			err_system(0x1)		/* user space library */
#define	err_server		err_system(0x2)		/* user space servers */
#define	err_ipc			err_system(0x3)		/* old ipc errors */
#define err_mach_ipc		err_system(0x4)		/* mach-ipc errors */
#define err_local		err_system(0x3e)	/* user defined errors */
#define	err_ipc_compat		err_system(0x3f)	/* (compatibility) mach-ipc errors */

#define	err_max_system		0x3f


/*	unix errors get lumped into one subsystem  */
#define	unix_err(errno)		(err_kern|err_sub(3)|errno)

typedef	kern_return_t	mach_error_t;
typedef mach_error_t	(* mach_error_fn_t)( void );

#endif	/* _MACH_ERROR_H_ */