[ac7d5ef0] | 1 | /* |
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| 2 | * Multiprocessing Support for the Object Handler |
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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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[5e9b32b] | 17 | #include <rtems/score/interr.h> |
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| 18 | #include <rtems/score/object.h> |
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| 19 | #include <rtems/score/wkspace.h> |
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| 20 | #include <rtems/score/thread.h> |
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[ac7d5ef0] | 21 | |
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| 22 | /*PAGE |
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| 23 | * |
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| 24 | * _Objects_MP_Handler_initialization |
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| 25 | * |
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| 26 | */ |
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| 27 | |
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| 28 | void _Objects_MP_Handler_initialization ( |
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[3a4ae6c] | 29 | unsigned32 node, |
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| 30 | unsigned32 maximum_nodes, |
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| 31 | unsigned32 maximum_global_objects |
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[ac7d5ef0] | 32 | ) |
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| 33 | { |
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[3a4ae6c] | 34 | _Objects_MP_Maximum_global_objects = maximum_global_objects; |
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[ac7d5ef0] | 35 | |
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| 36 | if ( maximum_global_objects == 0 ) { |
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| 37 | _Chain_Initialize_empty( &_Objects_MP_Inactive_global_objects ); |
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| 38 | return; |
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| 39 | } |
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| 40 | |
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| 41 | _Chain_Initialize( |
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| 42 | &_Objects_MP_Inactive_global_objects, |
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| 43 | _Workspace_Allocate_or_fatal_error( |
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| 44 | maximum_global_objects * sizeof( Objects_MP_Control ) |
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| 45 | ), |
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| 46 | maximum_global_objects, |
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| 47 | sizeof( Objects_MP_Control ) |
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| 48 | ); |
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| 49 | |
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| 50 | } |
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| 51 | |
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| 52 | /*PAGE |
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| 53 | * |
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| 54 | * _Objects_MP_Open |
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| 55 | * |
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| 56 | */ |
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[7f6a24ab] | 57 | |
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| 58 | void _Objects_MP_Open ( |
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| 59 | Objects_Information *information, |
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| 60 | Objects_MP_Control *the_global_object, |
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| 61 | unsigned32 the_name, /* XXX -- wrong for variable */ |
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| 62 | Objects_Id the_id |
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| 63 | ) |
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| 64 | { |
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| 65 | the_global_object->Object.id = the_id; |
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| 66 | the_global_object->name = the_name; |
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| 67 | |
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| 68 | _Chain_Prepend( |
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[3a4ae6c] | 69 | &information->global_table[ _Objects_Get_node( the_id ) ], |
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[7f6a24ab] | 70 | &the_global_object->Object.Node |
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| 71 | ); |
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| 72 | |
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| 73 | } |
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[ac7d5ef0] | 74 | |
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[7f6a24ab] | 75 | /*PAGE |
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| 76 | * |
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| 77 | * _Objects_MP_Allocate_and_open |
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| 78 | * |
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| 79 | */ |
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| 80 | |
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| 81 | boolean _Objects_MP_Allocate_and_open ( |
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[ac7d5ef0] | 82 | Objects_Information *information, |
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[3235ad9] | 83 | unsigned32 the_name, /* XXX -- wrong for variable */ |
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[ac7d5ef0] | 84 | Objects_Id the_id, |
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| 85 | boolean is_fatal_error |
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| 86 | ) |
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| 87 | { |
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[3235ad9] | 88 | Objects_MP_Control *the_global_object; |
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[ac7d5ef0] | 89 | |
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| 90 | the_global_object = _Objects_MP_Allocate_global_object(); |
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| 91 | if ( _Objects_MP_Is_null_global_object( the_global_object ) ) { |
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| 92 | |
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| 93 | if ( is_fatal_error == FALSE ) |
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| 94 | return FALSE; |
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| 95 | |
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[3a4ae6c] | 96 | _Internal_error_Occurred( |
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| 97 | INTERNAL_ERROR_CORE, |
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| 98 | TRUE, |
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| 99 | INTERNAL_ERROR_OUT_OF_GLOBAL_OBJECTS |
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| 100 | ); |
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[ac7d5ef0] | 101 | |
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| 102 | } |
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| 103 | |
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[7f6a24ab] | 104 | _Objects_MP_Open( information, the_global_object, the_name, the_id ); |
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[ac7d5ef0] | 105 | |
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| 106 | return TRUE; |
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| 107 | } |
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| 108 | |
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| 109 | /*PAGE |
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| 110 | * |
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| 111 | * _Objects_MP_Close |
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| 112 | * |
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| 113 | */ |
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| 114 | |
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| 115 | void _Objects_MP_Close ( |
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| 116 | Objects_Information *information, |
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| 117 | Objects_Id the_id |
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| 118 | ) |
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| 119 | { |
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| 120 | Chain_Control *the_chain; |
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| 121 | Chain_Node *the_node; |
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| 122 | Objects_MP_Control *the_object; |
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| 123 | |
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[3a4ae6c] | 124 | the_chain = &information->global_table[ _Objects_Get_node( the_id ) ]; |
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[ac7d5ef0] | 125 | |
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| 126 | for ( the_node = the_chain->first ; |
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| 127 | !_Chain_Is_tail( the_chain, the_node ) ; |
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| 128 | the_node = the_node->next ) { |
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| 129 | |
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| 130 | the_object = (Objects_MP_Control *) the_node; |
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| 131 | |
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| 132 | if ( _Objects_Are_ids_equal( the_object->Object.id, the_id ) ) { |
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| 133 | |
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| 134 | _Chain_Extract( the_node ); |
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| 135 | _Objects_MP_Free_global_object( the_object ); |
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| 136 | return; |
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| 137 | } |
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| 138 | |
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| 139 | } |
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| 140 | |
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[3a4ae6c] | 141 | _Internal_error_Occurred( |
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| 142 | INTERNAL_ERROR_CORE, |
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| 143 | TRUE, |
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| 144 | INTERNAL_ERROR_INVALID_GLOBAL_ID |
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| 145 | ); |
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[ac7d5ef0] | 146 | } |
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| 147 | |
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| 148 | /*PAGE |
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| 149 | * |
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| 150 | * _Objects_MP_Global_name_search |
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| 151 | * |
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| 152 | */ |
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| 153 | |
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[3a4ae6c] | 154 | Objects_Name_to_id_errors _Objects_MP_Global_name_search ( |
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[ac7d5ef0] | 155 | Objects_Information *information, |
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| 156 | Objects_Name the_name, |
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| 157 | unsigned32 nodes_to_search, |
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| 158 | Objects_Id *the_id |
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| 159 | ) |
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| 160 | { |
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| 161 | unsigned32 low_node; |
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| 162 | unsigned32 high_node; |
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| 163 | unsigned32 node_index; |
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| 164 | Chain_Control *the_chain; |
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| 165 | Chain_Node *the_node; |
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| 166 | Objects_MP_Control *the_object; |
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[3235ad9] | 167 | unsigned32 name_to_use = *(unsigned32 *)the_name; /* XXX variable */ |
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[ac7d5ef0] | 168 | |
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[3a4ae6c] | 169 | if ( nodes_to_search > _Objects_Maximum_nodes ) |
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| 170 | return OBJECTS_INVALID_NODE; |
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[ac7d5ef0] | 171 | |
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| 172 | if ( information->global_table == NULL ) |
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[3a4ae6c] | 173 | return OBJECTS_INVALID_NAME; |
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[ac7d5ef0] | 174 | |
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[3a4ae6c] | 175 | if ( nodes_to_search == OBJECTS_SEARCH_ALL_NODES || |
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| 176 | nodes_to_search == OBJECTS_SEARCH_OTHER_NODES ) { |
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[ac7d5ef0] | 177 | low_node = 1; |
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[3a4ae6c] | 178 | high_node = _Objects_Maximum_nodes; |
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[ac7d5ef0] | 179 | } else { |
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| 180 | low_node = |
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| 181 | high_node = nodes_to_search; |
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| 182 | } |
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| 183 | |
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| 184 | _Thread_Disable_dispatch(); |
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| 185 | |
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| 186 | for ( node_index = low_node ; node_index <= high_node ; node_index++ ) { |
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| 187 | |
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| 188 | /* |
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| 189 | * NOTE: The local node was search (if necessary) by |
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| 190 | * _Objects_Name_to_id before this was invoked. |
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| 191 | */ |
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| 192 | |
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| 193 | if ( !_Objects_Is_local_node( node_index ) ) { |
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| 194 | the_chain = &information->global_table[ node_index ]; |
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| 195 | |
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| 196 | for ( the_node = the_chain->first ; |
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| 197 | !_Chain_Is_tail( the_chain, the_node ) ; |
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| 198 | the_node = the_node->next ) { |
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| 199 | |
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| 200 | the_object = (Objects_MP_Control *) the_node; |
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| 201 | |
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[3235ad9] | 202 | if ( the_object->name == name_to_use ) { |
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[ac7d5ef0] | 203 | *the_id = the_object->Object.id; |
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| 204 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 205 | return OBJECTS_SUCCESSFUL; |
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[ac7d5ef0] | 206 | } |
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| 207 | } |
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| 208 | } |
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| 209 | } |
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| 210 | |
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| 211 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 212 | return OBJECTS_INVALID_NAME; |
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[ac7d5ef0] | 213 | } |
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| 214 | |
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| 215 | /*PAGE |
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| 216 | * |
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| 217 | * _Objects_MP_Is_remote |
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| 218 | * |
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| 219 | */ |
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| 220 | |
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| 221 | void _Objects_MP_Is_remote ( |
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| 222 | Objects_Information *information, |
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| 223 | Objects_Id the_id, |
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| 224 | Objects_Locations *location, |
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| 225 | Objects_Control **the_object |
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| 226 | ) |
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| 227 | { |
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| 228 | unsigned32 node; |
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| 229 | Chain_Control *the_chain; |
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| 230 | Chain_Node *the_node; |
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| 231 | Objects_MP_Control *the_global_object; |
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| 232 | |
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[3a4ae6c] | 233 | node = _Objects_Get_node( the_id ); |
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[ac7d5ef0] | 234 | |
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| 235 | /* |
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| 236 | * NOTE: The local node was search (if necessary) by |
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| 237 | * _Objects_Name_to_id before this was invoked. |
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| 238 | * |
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| 239 | * The NODE field of an object id cannot be 0 |
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| 240 | * because 0 is an invalid node number. |
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| 241 | */ |
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| 242 | |
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| 243 | if ( node == 0 || |
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| 244 | _Objects_Is_local_node( node ) || |
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[3a4ae6c] | 245 | node > _Objects_Maximum_nodes || |
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[ac7d5ef0] | 246 | information->global_table == NULL ) { |
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| 247 | |
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| 248 | *location = OBJECTS_ERROR; |
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| 249 | *the_object = NULL; |
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| 250 | return; |
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| 251 | } |
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| 252 | |
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| 253 | _Thread_Disable_dispatch(); |
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| 254 | |
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| 255 | the_chain = &information->global_table[ node ]; |
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| 256 | |
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| 257 | for ( the_node = the_chain->first ; |
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| 258 | !_Chain_Is_tail( the_chain, the_node ) ; |
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| 259 | the_node = the_node->next ) { |
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| 260 | |
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| 261 | the_global_object = (Objects_MP_Control *) the_node; |
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| 262 | |
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| 263 | if ( _Objects_Are_ids_equal( the_global_object->Object.id, the_id ) ) { |
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| 264 | _Thread_Unnest_dispatch(); |
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| 265 | *location = OBJECTS_REMOTE; |
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| 266 | *the_object = (Objects_Control *) the_global_object; |
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| 267 | return; |
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| 268 | } |
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| 269 | } |
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| 270 | |
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| 271 | _Thread_Enable_dispatch(); |
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| 272 | *location = OBJECTS_ERROR; |
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| 273 | *the_object = NULL; |
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| 274 | |
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| 275 | } |
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