1 | /* |
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2 | * Extension Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * All rights assigned to U.S. Government, 1994. |
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8 | * |
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9 | * This material may be reproduced by or for the U.S. Government pursuant |
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10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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11 | * notice must appear in all copies of this file and its derivatives. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/object.h> |
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18 | #include <rtems/thread.h> |
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19 | #include <rtems/extension.h> |
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20 | |
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21 | /*PAGE |
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22 | * |
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23 | * _Extension_Manager_initialization |
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24 | * |
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25 | * This routine initializes all extension manager related data structures. |
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26 | * |
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27 | * Input parameters: |
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28 | * maximum_extensions - number of extensions to initialize |
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29 | * |
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30 | * Output parameters: NONE |
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31 | */ |
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32 | |
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33 | void _Extension_Manager_initialization( |
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34 | unsigned32 maximum_extensions |
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35 | ) |
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36 | { |
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37 | _Objects_Initialize_information( |
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38 | &_Extension_Information, |
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39 | OBJECTS_RTEMS_EXTENSIONS, |
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40 | FALSE, |
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41 | maximum_extensions, |
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42 | sizeof( Extension_Control ) |
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43 | ); |
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44 | } |
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45 | |
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46 | /*PAGE |
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47 | * |
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48 | * rtems_extension_create |
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49 | * |
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50 | * This directive creates a extension and performs some initialization. |
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51 | * |
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52 | * Input parameters: |
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53 | * name - extension name |
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54 | * extension_table - pointer to extension set information |
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55 | * id - pointer to extension id |
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56 | * |
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57 | * Output parameters: |
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58 | * id - extension id |
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59 | * RTEMS_SUCCESSFUL - if successful |
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60 | * error code - if unsuccessful |
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61 | */ |
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62 | |
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63 | rtems_status_code rtems_extension_create( |
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64 | Objects_Name name, |
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65 | rtems_extensions_table *extension_table, |
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66 | Objects_Id *id |
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67 | ) |
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68 | { |
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69 | Extension_Control *the_extension; |
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70 | |
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71 | if ( !_Objects_Is_name_valid( name ) ) |
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72 | return ( RTEMS_INVALID_NAME ); |
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73 | |
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74 | _Thread_Disable_dispatch(); /* to prevent deletion */ |
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75 | |
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76 | the_extension = _Extension_Allocate(); |
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77 | |
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78 | if ( !the_extension ) { |
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79 | _Thread_Enable_dispatch(); |
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80 | return( RTEMS_TOO_MANY ); |
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81 | } |
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82 | |
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83 | _User_extensions_Add_set( &the_extension->Extension, extension_table ); |
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84 | |
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85 | _Objects_Open( &_Extension_Information, &the_extension->Object, name ); |
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86 | |
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87 | *id = the_extension->Object.id; |
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88 | _Thread_Enable_dispatch(); |
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89 | return( RTEMS_SUCCESSFUL ); |
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90 | } |
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91 | |
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92 | /*PAGE |
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93 | * |
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94 | * rtems_extension_ident |
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95 | * |
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96 | * This directive returns the system ID associated with |
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97 | * the extension name. |
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98 | * |
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99 | * Input parameters: |
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100 | * name - user defined message queue name |
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101 | * id - pointer to extension id |
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102 | * |
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103 | * Output parameters: |
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104 | * *id - message queue id |
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105 | * RTEMS_SUCCESSFUL - if successful |
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106 | * error code - if unsuccessful |
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107 | */ |
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108 | |
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109 | rtems_status_code rtems_extension_ident( |
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110 | Objects_Name name, |
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111 | Objects_Id *id |
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112 | ) |
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113 | { |
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114 | return _Objects_Name_to_id( |
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115 | &_Extension_Information, |
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116 | name, |
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117 | RTEMS_SEARCH_LOCAL_NODE, |
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118 | id |
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119 | ); |
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120 | } |
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121 | |
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122 | /*PAGE |
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123 | * |
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124 | * rtems_extension_delete |
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125 | * |
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126 | * This directive allows a thread to delete a extension. |
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127 | * |
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128 | * Input parameters: |
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129 | * id - extension id |
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130 | * |
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131 | * Output parameters: |
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132 | * RTEMS_SUCCESSFUL - if successful |
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133 | * error code - if unsuccessful |
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134 | */ |
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135 | |
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136 | rtems_status_code rtems_extension_delete( |
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137 | Objects_Id id |
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138 | ) |
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139 | { |
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140 | Extension_Control *the_extension; |
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141 | Objects_Locations location; |
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142 | |
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143 | the_extension = _Extension_Get( id, &location ); |
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144 | switch ( location ) { |
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145 | case OBJECTS_ERROR: |
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146 | case OBJECTS_REMOTE: /* should never return this */ |
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147 | return( RTEMS_INVALID_ID ); |
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148 | case OBJECTS_LOCAL: |
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149 | _User_extensions_Remove_set( &the_extension->Extension ); |
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150 | _Objects_Close( &_Extension_Information, &the_extension->Object ); |
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151 | _Extension_Free( the_extension ); |
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152 | _Thread_Enable_dispatch(); |
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153 | return( RTEMS_SUCCESSFUL ); |
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154 | } |
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155 | |
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156 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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157 | } |
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