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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. |