gcc/m2/gm2-libs-iso/ErrnoCategory.def

   1 (* ErrnoCategory.def provides an interface to errno.
   2
   3 Copyright (C) 2008-2024 Free Software Foundation, Inc.
   4 Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
   5
   6 This file is part of GNU Modula-2.
   7
   8 GNU Modula-2 is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GNU Modula-2 is distributed in the hope that it will be useful, but
  14 WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 General Public License for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  *)
  26
  27 DEFINITION MODULE ErrnoCategory ;
  28
  29 (*
  30    provides an interface to errno (if the system
  31    supports it) which determines whether the current
  32    errno is a hard or soft error.  These distinctions
  33    are needed by the ISO Modula-2 libraries.  Not all
  34    errno values are tested, only those which could be
  35    related to a device.
  36 *)
  37
  38 IMPORT ChanConsts ;
  39
  40
  41 (*
  42    IsErrnoHard - returns TRUE if the value of errno is associated with
  43                  a hard device error.
  44 *)
  45
  46 PROCEDURE IsErrnoHard (e: INTEGER) : BOOLEAN ;
  47
  48
  49 (*
  50    IsErrnoSoft - returns TRUE if the value of errno is associated with
  51                  a soft device error.
  52 *)
  53
  54 PROCEDURE IsErrnoSoft (e: INTEGER) : BOOLEAN ;
  55
  56
  57 (*
  58    UnAvailable - returns TRUE if the value of errno indicates that
  59                  the resource or device is unavailable for some
  60                  reason.
  61 *)
  62
  63 PROCEDURE UnAvailable (e: INTEGER) : BOOLEAN ;
  64
  65
  66 (*
  67    GetOpenResults - maps errno onto the ISO Modula-2 enumerated
  68                     type, OpenResults.
  69 *)
  70
  71 PROCEDURE GetOpenResults (e: INTEGER) : ChanConsts.OpenResults ;
  72
  73
  74 END ErrnoCategory.