errno.h Source File

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errno.h
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1 /* Copyright (c) 2002,2007 Marek Michalkiewicz
2 All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are met:
6
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in
12 the documentation and/or other materials provided with the
13 distribution.
14
15 * Neither the name of the copyright holders nor the names of
16 contributors may be used to endorse or promote products derived
17 from this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 POSSIBILITY OF SUCH DAMAGE. */
30
31 /* $Id: errno.h 1196 2007-01-23 15:34:58Z joerg_wunsch $ */
32
33 #ifndef __ERRNO_H_
34 #define __ERRNO_H_ 1
35
36 /** \file */
37 /** \defgroup avr_errno <errno.h>: System Errors
38
39 \code #include <errno.h>\endcode
40
41 Some functions in the library set the global variable \c errno when an
42 error occurs. The file, \c <errno.h>, provides symbolic names for various
43 error codes.
44
45 \warning The \c errno global variable is not safe to use in a threaded or
46 multi-task system. A race condition can occur if a task is interrupted
47 between the call which sets \c error and when the task examines \c
48 errno. If another task changes \c errno during this time, the result will
49 be incorrect for the interrupted task. */
50
51 #ifdef __cplusplus
52 extern "C" {
53 #endif
54
55 extern int errno;
56
57 #ifdef __cplusplus
58 }
59 #endif
60
61 /** \ingroup avr_errno
62 \def EDOM
63
64 Domain error. */
65 #define EDOM 33
66
67 /** \ingroup avr_errno
68 \def ERANGE
69
70 Range error. */
71 #define ERANGE 34
72
73 #endif

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