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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 Cygnus eCos Public License |
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14 // Version 1.0 (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://sourceware.cygnus.com/ecos |
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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 Cygnus Operating System, released |
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24 // September 30, 1998. |
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25 // |
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26 // The Initial Developer of the Original Code is Cygnus. Portions created |
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27 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
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30 //####COPYRIGHTEND#### |
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31 //=========================================================================== |
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32 //#####DESCRIPTIONBEGIN#### |
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33 // |
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34 // Author(s): jlarmour@cygnus.co.uk |
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35 // Contributors: jlarmour@cygnus.co.uk |
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36 // Date: 1998-06-11 |
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37 // Purpose: To provide a common set of error codes |
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38 // Description: This provides a common set of error codes that all packages can |
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39 // agree on. It doesn't preclude them defining their own error |
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40 // return system, but this is a preferable system to use to help |
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41 // error support be as general as possible. |
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42 // |
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43 // We try and conform to the ANSI/POSIX error code format, namely |
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44 // starting with the character 'E' |
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45 // |
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46 // Usage: #include <cyg/error/codes.h> |
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47 // |
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48 // Example: |
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49 // |
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50 // err=myfun(); |
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51 // if (err != ENOERR) |
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52 // { |
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53 // str=strerror(err); |
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54 // printf("myfun returned error: %s\n", str); |
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55 // } |
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56 // else .... |
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57 // |
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58 //####DESCRIPTIONEND#### |
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59 // |
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60 //=========================================================================== |
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61 |
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62 // CONFIGURATION |
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63 |
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64 #include <pkgconf/error.h> // Configuration header |
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65 #include <cyg/infra/cyg_type.h> // externC |
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66 |
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67 // Include the error package? |
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68 #ifdef CYGPKG_ERROR |
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69 |
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70 |
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71 // TYPE DEFINITIONS |
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72 |
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73 // A type for error codes which may be useful to explain the purpose of |
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74 // a variable or return code. It shows that it contains an error code |
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75 // of the type defined below |
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76 |
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77 typedef int Cyg_ErrNo; |
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78 |
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79 |
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80 // FUNCTION PROTOTYPES |
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81 |
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82 // ANSI standard strerror() function as described by ANSI chap. 7.11.6.2. |
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83 // This is normally provided by <string.h> |
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84 |
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85 externC char * |
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86 strerror( Cyg_ErrNo ); |
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87 |
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88 // prototype for the actual implementation. Equivalent to the above, but |
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89 // used internally by this product in preference |
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90 |
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91 externC char * |
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92 _strerror( Cyg_ErrNo ); |
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93 |
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94 |
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95 // CONSTANT DEFINITIONS |
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96 |
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97 // If adding to this list, you must also update strerror() with its text |
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98 // If there is a common error of the same purpose on Unix, try and use its |
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99 // name and number. If not, use one above 200 to prevent future conflicts |
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100 // |
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101 // Do not use negative numbers, so that functions can return positive on |
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102 // success and -ESOMETHING on error, and it all works consistently. |
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103 |
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104 #define ENOERR 0 // No error |
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105 #define EPERM 1 // Not permitted |
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106 #define ENOENT 2 // No such entity |
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107 #define ESRCH 3 // No such process |
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108 #define EINTR 4 // Operation interrupted |
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109 #define EIO 5 // I/O error |
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110 #define EBADF 9 // Bad file handle |
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111 #define EAGAIN 11 // Try again later |
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112 #define EWOULDBLOCK EAGAIN |
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113 #define ENOMEM 12 // Out of memory |
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114 #define EBUSY 16 // Resource busy |
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115 #define ENODEV 19 // No such device |
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116 #define EINVAL 22 // Invalid argument |
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117 #define EMFILE 24 // Too many open files |
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118 #define EDOM 33 // Argument to math function outside valid |
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119 // domain |
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120 #define ERANGE 34 // Math result cannot be represented |
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121 #define ENOSYS 38 // Function not implemented |
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122 |
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123 #define EEOF 200 // End of file reached |
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124 #define ENOSUPP 201 // Operation not supported |
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125 #define EDEVNOSUPP 202 // Device does not support this operation |
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126 |
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127 #endif // ifdef CYGPKG_ERROR |
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128 |
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129 #endif // CYGONCE_ERROR_CODES_H multiple inclusion protection |
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130 |
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131 // EOF codes.h |
