FreeBSD/Linux Kernel Cross Reference
sys/mach/error.h

     /* 
      * 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  Software.Distribution@CS.CMU.EDU
     *  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.
     */
    /*
     * HISTORY
     * $Log:        error.h,v $
     * Revision 2.6  93/01/14  17:41:31  danner
     *      Standardized include symbol name.
     *      [92/06/10            pds]
     * 
     * Revision 2.5  92/03/31  15:18:11  rpd
     *      Added err_bootstrap for bootstrap errors.
     *      [92/03/09            rpd]
     * 
     * Revision 2.4  91/05/14  16:51:24  mrt
     *      Correcting copyright
     * 
     * Revision 2.3  91/02/05  17:31:48  mrt
     *      Changed to new Mach copyright
     *      [91/02/01  17:16:50  mrt]
     * 
     * Revision 2.2  90/06/02  14:57:47  rpd
     *      Added err_mach_ipc for new IPC.
     *      [90/03/26  22:28:42  rpd]
     * 
     * Revision 2.1  89/08/03  16:02:07  rwd
     * Created.
     * 
     * Revision 2.4  89/02/25  18:13:18  gm0w
     *      Changes for cleanup.
     * 
     * Revision 2.3  89/02/07  00:51:57  mwyoung
     * Relocated from sys/error.h
     * 
     * Revision 2.2  88/10/18  00:37:31  mwyoung
     *      Added {system,sub and code}_emask 
     *      [88/10/17  17:06:58  mrt]
     * 
     *      Added {system,sub and code}_emask 
     *
     *  12-May-88 Mary Thompson (mrt) at Carnegie Mellon
     *      Changed mach_error_t from unsigned int to kern_return_t
     *      which is a 32 bit integer regardless of machine type.
     *      insigned int was incompatible with old usages of mach_error.
     *
     *  10-May-88 Douglas Orr (dorr) at Carnegie-Mellon University
     *      Missing endif replaced
     *
     *   5-May-88 Mary Thompson (mrt) at Carnegie Mellon
     *      Changed typedef of mach_error_t from long to unsigned int
     *      to keep our Camelot users happy. Also moved the nonkernel
     *      function declarations from here to mach_error.h.
     *
     *  10-Feb-88 Douglas Orr (dorr) at Carnegie-Mellon University
     *      Created.
     *
     */
    /*
     * 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_bootstrap           err_system(0x5)         /* bootstrap 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)();
   
   #endif  /* _MACH_ERROR_H_ */

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