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annotate packages/error/current/include/codes.h @ 66:bf00f99aec69 ecos-sw-2000-02-02

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Merge from eCos master repository on 2000-02-02-19:16:44-GMT
author jlarmour
date Wed, 02 Feb 2000 19:57:02 +0000
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1 #ifndef CYGONCE_ERROR_CODES_H
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2 #define CYGONCE_ERROR_CODES_H
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3 //===========================================================================
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4 //
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5 // codes.h
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6 //
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7 // Common error code definitions
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8 //
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9 //===========================================================================
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10 //####COPYRIGHTBEGIN####
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11 //
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12 // -------------------------------------------
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13 // The contents of this file are subject to the Red Hat eCos Public License
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14 // Version 1.1 (the "License"); you may not use this file except in
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15 // compliance with the License. You may obtain a copy of the License at
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16 // http://www.redhat.com/
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17 //
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18 // Software distributed under the License is distributed on an "AS IS"
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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20 // License for the specific language governing rights and limitations under
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21 // the License.
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22 //
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23 // The Original Code is eCos - Embedded Configurable Operating System,
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24 // released September 30, 1998.
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25 //
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26 // The Initial Developer of the Original Code is Red Hat.
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27 // Portions created by Red Hat are
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28 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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29 // All Rights Reserved.
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30 // -------------------------------------------
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31 //
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32 //####COPYRIGHTEND####
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33 //===========================================================================
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34 //#####DESCRIPTIONBEGIN####
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35 //
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36 // Author(s): jlarmour
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37 // Contributors: jlarmour
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38 // Date: 1998-06-11
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39 // Purpose: To provide a common set of error codes
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40 // Description: This provides a common set of error codes that all packages can
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41 // agree on. It doesn't preclude them defining their own error
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42 // return system, but this is a preferable system to use to help
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43 // error support be as general as possible.
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44 //
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45 // We try and conform to the ANSI/POSIX error code format, namely
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46 // starting with the character 'E'
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47 //
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48 // Usage: #include <cyg/error/codes.h>
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49 //
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50 // Example:
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51 //
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52 // err=myfun();
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53 // if (err != ENOERR)
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54 // {
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55 // str=strerror(err);
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56 // printf("myfun returned error: %s\n", str);
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57 // }
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58 // else ....
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59 //
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60 //####DESCRIPTIONEND####
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61 //
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62 //===========================================================================
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63
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64 // CONFIGURATION
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65
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66 #include <pkgconf/error.h> // Configuration header
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67 #include <cyg/infra/cyg_type.h> // externC
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68
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69 // Include the error package?
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70 #ifdef CYGPKG_ERROR
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71
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72
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73 // TYPE DEFINITIONS
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74
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75 // A type for error codes which may be useful to explain the purpose of
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76 // a variable or return code. It shows that it contains an error code
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77 // of the type defined below
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78
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79 typedef int Cyg_ErrNo;
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80
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81
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82 // FUNCTION PROTOTYPES
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83
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84 // ANSI standard strerror() function as described by ANSI chap. 7.11.6.2.
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85 // This is normally provided by <string.h>
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86
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87 externC char *
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88 strerror( Cyg_ErrNo );
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89
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90 // prototype for the actual implementation. Equivalent to the above, but
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91 // used internally by this product in preference
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92
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93 externC char *
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94 _strerror( Cyg_ErrNo );
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95
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96
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97 // CONSTANT DEFINITIONS
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98
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99 // If adding to this list, you must also update strerror() with its text
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100 // If there is a common error of the same purpose on Unix, try and use its
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101 // name and number. If not, use one above 200 to prevent future conflicts
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102 //
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103 // Do not use negative numbers, so that functions can return positive on
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104 // success and -ESOMETHING on error, and it all works consistently.
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105
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106 #define ENOERR 0 // No error
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107 #define EPERM 1 // Not permitted
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108 #define ENOENT 2 // No such entity
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109 #define ESRCH 3 // No such process
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110 #define EINTR 4 // Operation interrupted
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111 #define EIO 5 // I/O error
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112 #define EBADF 9 // Bad file handle
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113 #define EAGAIN 11 // Try again later
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114 #define EWOULDBLOCK EAGAIN
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115 #define ENOMEM 12 // Out of memory
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116 #define EBUSY 16 // Resource busy
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117 #define ENODEV 19 // No such device
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118 #define EINVAL 22 // Invalid argument
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119 #define EMFILE 24 // Too many open files
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120 #define EDOM 33 // Argument to math function outside valid
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121 // domain
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122 #define ERANGE 34 // Math result cannot be represented
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123 #define ENOSYS 38 // Function not implemented
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124
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125 #define EEOF 200 // End of file reached
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126 #define ENOSUPP 201 // Operation not supported
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127 #define EDEVNOSUPP 202 // Device does not support this operation
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128
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129
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130 #endif // ifdef CYGPKG_ERROR
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131
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132 #endif // CYGONCE_ERROR_CODES_H multiple inclusion protection
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133
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134 // EOF codes.h