[ac7d5ef0] | 1 | /* |
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| 2 | * 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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[b06e68ef] | 15 | |
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[ac7d5ef0] | 16 | #include <rtems/system.h> |
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| 17 | #include <rtems/chain.h> |
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| 18 | #include <rtems/config.h> |
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| 19 | #include <rtems/object.h> |
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| 20 | #include <rtems/objectmp.h> |
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| 21 | #include <rtems/thread.h> |
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| 22 | #include <rtems/wkspace.h> |
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| 23 | |
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| 24 | /*PAGE |
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| 25 | * |
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| 26 | * _Objects_Handler_initialization |
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| 27 | * |
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| 28 | * This routine initializes the object handler. |
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| 29 | * |
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| 30 | * Input parameters: |
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| 31 | * node - local node |
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| 32 | * maximum_global_objects - number of configured global objects |
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| 33 | * |
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| 34 | * Output parameters: NONE |
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| 35 | */ |
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| 36 | |
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| 37 | void _Objects_Handler_initialization( |
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| 38 | unsigned32 node, |
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| 39 | unsigned32 maximum_global_objects |
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| 40 | ) |
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| 41 | { |
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| 42 | _Objects_Local_node = node; |
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| 43 | |
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| 44 | _Objects_MP_Handler_initialization( maximum_global_objects ); |
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| 45 | } |
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| 46 | |
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| 47 | /*PAGE |
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| 48 | * |
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| 49 | * _Objects_Initialize_information |
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| 50 | * |
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| 51 | * This routine initializes all object information related data structures. |
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| 52 | * |
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| 53 | * Input parameters: |
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| 54 | * information - object class |
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| 55 | * supports_global - TRUE if this is a global object class |
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| 56 | * maximum - maximum objects of this class |
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| 57 | * size - size of this object's control block |
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| 58 | * |
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| 59 | * Output parameters: NONE |
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| 60 | */ |
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| 61 | |
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| 62 | void _Objects_Initialize_information( |
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| 63 | Objects_Information *information, |
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| 64 | boolean supports_global, |
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| 65 | unsigned32 maximum, |
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| 66 | unsigned32 size |
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| 67 | ) |
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| 68 | { |
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| 69 | unsigned32 minimum_index; |
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| 70 | unsigned32 index; |
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| 71 | Objects_Control *the_object; |
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| 72 | |
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| 73 | information->maximum = maximum; |
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| 74 | |
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| 75 | if ( maximum == 0 ) minimum_index = 0; |
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| 76 | else minimum_index = 1; |
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| 77 | |
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| 78 | information->minimum_id = |
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| 79 | _Objects_Build_id( _Objects_Local_node, minimum_index ); |
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| 80 | |
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| 81 | information->maximum_id = |
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| 82 | _Objects_Build_id( _Objects_Local_node, maximum ); |
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| 83 | |
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| 84 | information->local_table = _Workspace_Allocate_or_fatal_error( |
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| 85 | (maximum + 1) * sizeof(Objects_Control *) |
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| 86 | ); |
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| 87 | |
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| 88 | information->name_table = _Workspace_Allocate_or_fatal_error( |
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| 89 | (maximum + 1) * sizeof(Objects_Name) |
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| 90 | ); |
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| 91 | |
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| 92 | for ( index=0 ; index < maximum ; index++ ) { |
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| 93 | information->local_table[ index ] = NULL; |
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| 94 | information->name_table[ index ] = 0; |
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| 95 | } |
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| 96 | |
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| 97 | if ( maximum == 0 ) { |
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| 98 | _Chain_Initialize_empty( &information->Inactive ); |
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| 99 | } else { |
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| 100 | |
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| 101 | |
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| 102 | _Chain_Initialize( |
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| 103 | &information->Inactive, |
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| 104 | _Workspace_Allocate_or_fatal_error( maximum * size ), |
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| 105 | maximum, |
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| 106 | size |
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| 107 | ); |
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| 108 | |
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| 109 | the_object = (Objects_Control *) information->Inactive.first; |
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| 110 | for ( index=1; |
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| 111 | index <= maximum ; |
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| 112 | index++ ) { |
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| 113 | the_object->id = _Objects_Build_id( _Objects_Local_node, index ); |
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| 114 | the_object = (Objects_Control *) the_object->Node.next; |
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| 115 | } |
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| 116 | |
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| 117 | } |
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| 118 | |
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| 119 | if ( supports_global == TRUE && _Configuration_Is_multiprocessing() ) { |
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| 120 | |
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| 121 | information->global_table = _Workspace_Allocate_or_fatal_error( |
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| 122 | (_Configuration_MP_table->maximum_nodes + 1) * sizeof(Chain_Control) |
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| 123 | ); |
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| 124 | |
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| 125 | for ( index=1; |
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| 126 | index <= _Configuration_MP_table->maximum_nodes ; |
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| 127 | index++ ) |
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| 128 | _Chain_Initialize_empty( &information->global_table[ index ] ); |
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| 129 | } |
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| 130 | else |
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| 131 | information->global_table = NULL; |
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| 132 | } |
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| 133 | |
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| 134 | /*PAGE |
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| 135 | * |
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| 136 | * _Objects_Name_to_id |
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| 137 | * |
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| 138 | * These kernel routines search the object table(s) for the given |
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| 139 | * object name and returns the associated object id. |
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| 140 | * |
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| 141 | * Input parameters: |
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| 142 | * information - object information |
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| 143 | * name - user defined object name |
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| 144 | * node - node indentifier (0 indicates any node) |
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| 145 | * id - address of return ID |
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| 146 | * |
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| 147 | * Output parameters: |
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| 148 | * obj_id - object id |
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| 149 | * RTEMS_SUCCESSFUL - if successful |
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| 150 | * error code - if unsuccessful |
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| 151 | */ |
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| 152 | |
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| 153 | rtems_status_code _Objects_Name_to_id( |
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| 154 | Objects_Information *information, |
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| 155 | Objects_Name name, |
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| 156 | unsigned32 node, |
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| 157 | Objects_Id *id |
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| 158 | ) |
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| 159 | { |
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| 160 | Objects_Name *names; |
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| 161 | unsigned32 index; |
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| 162 | |
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| 163 | if ( name == 0 ) |
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| 164 | return( RTEMS_INVALID_NAME ); |
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| 165 | |
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| 166 | if ( (information->maximum != 0) && |
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| 167 | (node == RTEMS_SEARCH_ALL_NODES || |
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| 168 | node == RTEMS_SEARCH_LOCAL_NODE || |
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| 169 | _Objects_Is_local_node( node )) ) { |
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| 170 | for ( names = information->name_table, index = 1; |
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| 171 | index <= information->maximum; |
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| 172 | index++ |
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| 173 | ) |
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| 174 | if ( name == names[ index ] ) { |
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| 175 | *id = _Objects_Build_id( _Objects_Local_node, index ); |
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| 176 | return( RTEMS_SUCCESSFUL ); |
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| 177 | } |
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| 178 | } |
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| 179 | |
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| 180 | if ( _Objects_Is_local_node( node ) || node == RTEMS_SEARCH_LOCAL_NODE ) |
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| 181 | return( RTEMS_INVALID_NAME ); |
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| 182 | |
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| 183 | return ( _Objects_MP_Global_name_search( information, name, node, id ) ); |
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| 184 | } |
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| 185 | |
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| 186 | /*PAGE |
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| 187 | * |
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| 188 | * _Objects_Get |
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| 189 | * |
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| 190 | * This routine sets the object pointer for the given |
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| 191 | * object id based on the given object information structure. |
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| 192 | * |
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| 193 | * Input parameters: |
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| 194 | * information - pointer to entry in table for this class |
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| 195 | * id - object id to search for |
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| 196 | * location - address of where to store the location |
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| 197 | * |
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| 198 | * Output parameters: |
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| 199 | * returns - address of object if local |
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| 200 | * location - one of the following: |
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| 201 | * OBJECTS_ERROR - invalid object ID |
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| 202 | * OBJECTS_REMOTE - remote object |
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| 203 | * OBJECTS_LOCAL - local object |
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| 204 | */ |
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| 205 | |
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| 206 | Objects_Control *_Objects_Get( |
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| 207 | Objects_Information *information, |
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| 208 | Objects_Id id, |
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| 209 | Objects_Locations *location |
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| 210 | ) |
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| 211 | { |
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| 212 | Objects_Control *the_object; |
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| 213 | unsigned32 index; |
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| 214 | |
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| 215 | index = id - information->minimum_id; |
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| 216 | if ( information->maximum >= index ) { |
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| 217 | _Thread_Disable_dispatch(); |
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| 218 | if ( (the_object = information->local_table[index+1]) != NULL ) { |
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| 219 | *location = OBJECTS_LOCAL; |
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| 220 | return( the_object ); |
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| 221 | } |
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| 222 | _Thread_Enable_dispatch(); |
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| 223 | *location = OBJECTS_ERROR; |
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| 224 | return( NULL ); |
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| 225 | } |
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| 226 | *location = OBJECTS_ERROR; |
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| 227 | _Objects_MP_Is_remote( information, id, location, &the_object ); |
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| 228 | return the_object; |
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| 229 | } |
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[b06e68ef] | 230 | |
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| 231 | |
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| 232 | /*PAGE |
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| 233 | * |
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| 234 | * _Objects_Get_next |
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| 235 | * |
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| 236 | * Like _Objects_Get, but considers the 'id' as a "hint" and |
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| 237 | * finds next valid one after that point. |
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| 238 | * Mostly used for monitor and debug traversal of an object. |
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| 239 | * |
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| 240 | * Input parameters: |
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| 241 | * information - pointer to entry in table for this class |
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| 242 | * id - object id to search for |
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| 243 | * location - address of where to store the location |
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| 244 | * next_id - address to store next id to try |
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| 245 | * |
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| 246 | * Output parameters: |
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| 247 | * returns - address of object if local |
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| 248 | * location - one of the following: |
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| 249 | * OBJECTS_ERROR - invalid object ID |
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| 250 | * OBJECTS_REMOTE - remote object |
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| 251 | * OBJECTS_LOCAL - local object |
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| 252 | * next_id - will contain a reasonable "next" id to continue traversal |
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| 253 | * |
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| 254 | * NOTE: |
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| 255 | * assumes can add '1' to an id to get to next index. |
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| 256 | */ |
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| 257 | |
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| 258 | Objects_Control * |
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| 259 | _Objects_Get_next( |
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| 260 | Objects_Information *information, |
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| 261 | Objects_Id id, |
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| 262 | unsigned32 *location_p, |
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| 263 | Objects_Id *next_id_p |
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| 264 | ) |
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| 265 | { |
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| 266 | Objects_Control *object; |
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| 267 | Objects_Id next_id; |
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| 268 | |
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| 269 | if (rtems_get_index(id) == RTEMS_OBJECT_ID_INITIAL_INDEX) |
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| 270 | next_id = information->minimum_id; |
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| 271 | else |
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| 272 | next_id = id; |
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| 273 | |
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| 274 | do { |
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| 275 | /* walked off end of list? */ |
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| 276 | if (next_id > information->maximum_id) |
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| 277 | { |
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| 278 | *location_p = OBJECTS_ERROR; |
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| 279 | goto final; |
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| 280 | } |
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| 281 | |
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| 282 | /* try to grab one */ |
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| 283 | object = _Objects_Get(information, next_id, location_p); |
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| 284 | |
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| 285 | next_id++; |
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| 286 | |
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| 287 | } while (*location_p != OBJECTS_LOCAL); |
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| 288 | |
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| 289 | *next_id_p = next_id; |
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| 290 | return object; |
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| 291 | |
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| 292 | final: |
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| 293 | *next_id_p = RTEMS_OBJECT_ID_FINAL; |
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| 294 | return 0; |
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| 295 | } |
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