[ac7d5ef0] | 1 | /* |
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| 2 | * Object Handler |
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| 3 | * |
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| 4 | * |
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[60b791ad] | 5 | * COPYRIGHT (c) 1989-1998. |
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[ac7d5ef0] | 6 | * On-Line Applications Research Corporation (OAR). |
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[03f2154e] | 7 | * Copyright assigned to U.S. Government, 1994. |
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[ac7d5ef0] | 8 | * |
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[98e4ebf5] | 9 | * The license and distribution terms for this file may be |
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| 10 | * found in the file LICENSE in this distribution or at |
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[03f2154e] | 11 | * http://www.OARcorp.com/rtems/license.html. |
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[ac7d5ef0] | 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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[f4a8ee1] | 17 | #include <rtems/score/address.h> |
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[5e9b32b] | 18 | #include <rtems/score/chain.h> |
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| 19 | #include <rtems/score/object.h> |
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[97e2729d] | 20 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 21 | #include <rtems/score/objectmp.h> |
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[97e2729d] | 22 | #endif |
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[5e9b32b] | 23 | #include <rtems/score/thread.h> |
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| 24 | #include <rtems/score/wkspace.h> |
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| 25 | #include <rtems/score/sysstate.h> |
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[f4a8ee1] | 26 | #include <rtems/score/isr.h> |
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[ac7d5ef0] | 27 | |
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| 28 | /*PAGE |
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| 29 | * |
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| 30 | * _Objects_Handler_initialization |
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| 31 | * |
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| 32 | * This routine initializes the object handler. |
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| 33 | * |
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| 34 | * Input parameters: |
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| 35 | * node - local node |
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[3a4ae6c] | 36 | * maximum_nodes - number of nodes in the system |
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[ac7d5ef0] | 37 | * maximum_global_objects - number of configured global objects |
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| 38 | * |
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| 39 | * Output parameters: NONE |
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| 40 | */ |
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| 41 | |
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| 42 | void _Objects_Handler_initialization( |
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| 43 | unsigned32 node, |
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[3a4ae6c] | 44 | unsigned32 maximum_nodes, |
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[ac7d5ef0] | 45 | unsigned32 maximum_global_objects |
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| 46 | ) |
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| 47 | { |
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[3a4ae6c] | 48 | if ( node < 1 || node > maximum_nodes ) |
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| 49 | _Internal_error_Occurred( |
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| 50 | INTERNAL_ERROR_CORE, |
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| 51 | TRUE, |
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| 52 | INTERNAL_ERROR_INVALID_NODE |
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| 53 | ); |
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| 54 | |
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| 55 | _Objects_Local_node = node; |
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| 56 | _Objects_Maximum_nodes = maximum_nodes; |
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[ac7d5ef0] | 57 | |
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[97e2729d] | 58 | #if defined(RTEMS_MULTIPROCESSING) |
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[3a4ae6c] | 59 | _Objects_MP_Handler_initialization( |
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| 60 | node, |
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| 61 | maximum_nodes, |
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| 62 | maximum_global_objects |
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| 63 | ); |
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[97e2729d] | 64 | #endif |
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[ac7d5ef0] | 65 | } |
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| 66 | |
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[f4a8ee1] | 67 | /*PAGE |
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| 68 | * |
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| 69 | * _Objects_Extend_information |
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| 70 | * |
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| 71 | * This routine extends all object information related data structures. |
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| 72 | * |
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| 73 | * Input parameters: |
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| 74 | * information - object information table |
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| 75 | * |
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| 76 | * Output parameters: NONE |
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| 77 | */ |
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| 78 | |
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| 79 | void _Objects_Extend_information( |
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| 80 | Objects_Information *information |
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| 81 | ) |
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| 82 | { |
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| 83 | Objects_Control *the_object; |
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| 84 | void *name_area; |
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| 85 | Chain_Control Inactive; |
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| 86 | unsigned32 block_count; |
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| 87 | unsigned32 block; |
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| 88 | unsigned32 index_base; |
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| 89 | unsigned32 minimum_index; |
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| 90 | unsigned32 index; |
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| 91 | |
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| 92 | /* |
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| 93 | * Search for a free block of indexes. The block variable ends up set |
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| 94 | * to block_count + 1 if the table needs to be extended. |
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| 95 | */ |
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| 96 | |
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| 97 | minimum_index = _Objects_Get_index( information->minimum_id ); |
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[6a10709] | 98 | index_base = minimum_index; |
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| 99 | block = 0; |
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[f4a8ee1] | 100 | |
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[6a10709] | 101 | if ( information->maximum < minimum_index ) |
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[f4a8ee1] | 102 | block_count = 0; |
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| 103 | else { |
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| 104 | block_count = information->maximum / information->allocation_size; |
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| 105 | |
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| 106 | for ( ; block < block_count; block++ ) { |
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| 107 | if ( information->object_blocks[ block ] == NULL ) |
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| 108 | break; |
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| 109 | else |
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| 110 | index_base += information->allocation_size; |
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| 111 | } |
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| 112 | } |
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| 113 | |
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| 114 | /* |
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| 115 | * If the index_base is the maximum we need to grow the tables. |
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| 116 | */ |
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| 117 | |
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| 118 | if (index_base >= information->maximum ) { |
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| 119 | ISR_Level level; |
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| 120 | void **object_blocks; |
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| 121 | Objects_Name *name_table; |
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| 122 | unsigned32 *inactive_per_block; |
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| 123 | Objects_Control **local_table; |
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| 124 | unsigned32 maximum; |
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| 125 | void *old_tables; |
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| 126 | |
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| 127 | /* |
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[2cd5444] | 128 | * Growing the tables means allocating a new area, doing a copy and |
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| 129 | * updating the information table. |
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[f4a8ee1] | 130 | * |
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[2cd5444] | 131 | * If the maximum is minimum we do not have a table to copy. First |
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| 132 | * time through. |
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[f4a8ee1] | 133 | * |
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| 134 | * The allocation has : |
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| 135 | * |
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| 136 | * void *objects[block_count]; |
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[2cd5444] | 137 | * unsigned32 inactive_count[block_count]; |
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[f4a8ee1] | 138 | * Objects_Name *name_table[block_count]; |
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| 139 | * Objects_Control *local_table[maximum]; |
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| 140 | * |
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| 141 | * This is the order in memory. Watch changing the order. See the memcpy |
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| 142 | * below. |
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| 143 | */ |
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| 144 | |
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| 145 | /* |
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| 146 | * Up the block count and maximum |
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| 147 | */ |
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| 148 | |
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| 149 | block_count++; |
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| 150 | |
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| 151 | maximum = information->maximum + information->allocation_size; |
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| 152 | |
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| 153 | /* |
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| 154 | * Allocate the tables and break it up. |
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| 155 | */ |
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| 156 | |
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| 157 | if ( information->auto_extend ) { |
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| 158 | object_blocks = (void**) |
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| 159 | _Workspace_Allocate( |
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[2cd5444] | 160 | block_count * |
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| 161 | (sizeof(void *) + sizeof(unsigned32) + sizeof(Objects_Name *)) + |
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[f4a8ee1] | 162 | ((maximum + minimum_index) * sizeof(Objects_Control *)) |
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| 163 | ); |
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| 164 | |
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| 165 | if ( !object_blocks ) |
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| 166 | return; |
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| 167 | } |
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| 168 | else { |
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| 169 | object_blocks = (void**) |
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| 170 | _Workspace_Allocate_or_fatal_error( |
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[2cd5444] | 171 | block_count * |
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| 172 | (sizeof(void *) + sizeof(unsigned32) + sizeof(Objects_Name *)) + |
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[f4a8ee1] | 173 | ((maximum + minimum_index) * sizeof(Objects_Control *)) |
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| 174 | ); |
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| 175 | } |
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| 176 | |
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| 177 | /* |
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| 178 | * Break the block into the various sections. |
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| 179 | * |
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| 180 | */ |
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| 181 | |
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[2cd5444] | 182 | inactive_per_block = (unsigned32 *) _Addresses_Add_offset( |
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| 183 | object_blocks, block_count * sizeof(void*) ); |
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| 184 | name_table = (Objects_Name *) _Addresses_Add_offset( |
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| 185 | inactive_per_block, block_count * sizeof(unsigned32) ); |
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| 186 | local_table = (Objects_Control **) _Addresses_Add_offset( |
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| 187 | name_table, block_count * sizeof(Objects_Name *) ); |
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[f4a8ee1] | 188 | |
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| 189 | /* |
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[2cd5444] | 190 | * Take the block count down. Saves all the (block_count - 1) |
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| 191 | * in the copies. |
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[f4a8ee1] | 192 | */ |
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| 193 | |
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| 194 | block_count--; |
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| 195 | |
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| 196 | if ( information->maximum > minimum_index ) { |
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| 197 | |
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| 198 | /* |
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| 199 | * Copy each section of the table over. This has to be performed as |
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| 200 | * separate parts as size of each block has changed. |
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| 201 | */ |
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| 202 | |
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| 203 | memcpy( object_blocks, |
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| 204 | information->object_blocks, |
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| 205 | block_count * sizeof(void*) ); |
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| 206 | memcpy( inactive_per_block, |
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| 207 | information->inactive_per_block, |
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| 208 | block_count * sizeof(unsigned32) ); |
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| 209 | memcpy( name_table, |
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| 210 | information->name_table, |
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| 211 | block_count * sizeof(Objects_Name *) ); |
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| 212 | memcpy( local_table, |
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| 213 | information->local_table, |
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| 214 | (information->maximum + minimum_index) * sizeof(Objects_Control *) ); |
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| 215 | } |
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| 216 | else { |
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| 217 | |
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| 218 | /* |
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| 219 | * Deal with the special case of the 0 to minimum_index |
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| 220 | */ |
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| 221 | for ( index = 0; index < minimum_index; index++ ) { |
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| 222 | local_table[ index ] = NULL; |
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| 223 | } |
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| 224 | } |
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| 225 | |
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| 226 | /* |
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| 227 | * Initialise the new entries in the table. |
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| 228 | */ |
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| 229 | |
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| 230 | object_blocks[block_count] = NULL; |
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| 231 | inactive_per_block[block_count] = 0; |
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| 232 | name_table[block_count] = NULL; |
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| 233 | |
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| 234 | for ( index=index_base ; |
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| 235 | index < ( information->allocation_size + index_base ); |
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| 236 | index++ ) { |
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| 237 | local_table[ index ] = NULL; |
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| 238 | } |
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| 239 | |
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| 240 | _ISR_Disable( level ); |
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| 241 | |
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| 242 | old_tables = information->object_blocks; |
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| 243 | |
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| 244 | information->object_blocks = object_blocks; |
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| 245 | information->inactive_per_block = inactive_per_block; |
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| 246 | information->name_table = name_table; |
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| 247 | information->local_table = local_table; |
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| 248 | information->maximum = maximum; |
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| 249 | information->maximum_id = |
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| 250 | _Objects_Build_id( |
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| 251 | information->the_class, _Objects_Local_node, information->maximum |
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| 252 | ); |
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| 253 | |
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| 254 | _ISR_Enable( level ); |
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| 255 | |
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| 256 | if ( old_tables ) |
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| 257 | _Workspace_Free( old_tables ); |
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| 258 | |
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| 259 | block_count++; |
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| 260 | } |
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| 261 | |
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| 262 | /* |
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| 263 | * Allocate the name table, and the objects |
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| 264 | */ |
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| 265 | |
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| 266 | if ( information->auto_extend ) { |
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| 267 | information->object_blocks[ block ] = |
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| 268 | _Workspace_Allocate( |
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| 269 | (information->allocation_size * information->name_length) + |
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| 270 | (information->allocation_size * information->size) |
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| 271 | ); |
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| 272 | |
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| 273 | if ( !information->object_blocks[ block ] ) |
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| 274 | return; |
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| 275 | } |
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| 276 | else { |
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| 277 | information->object_blocks[ block ] = |
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| 278 | _Workspace_Allocate_or_fatal_error( |
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| 279 | (information->allocation_size * information->name_length) + |
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| 280 | (information->allocation_size * information->size) |
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| 281 | ); |
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| 282 | } |
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| 283 | |
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| 284 | name_area = (Objects_Name *) information->object_blocks[ block ]; |
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| 285 | information->name_table[ block ] = name_area; |
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| 286 | |
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| 287 | /* |
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| 288 | * Initialize objects .. add to a local chain first. |
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| 289 | */ |
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| 290 | |
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| 291 | _Chain_Initialize( |
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| 292 | &Inactive, |
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| 293 | _Addresses_Add_offset( information->object_blocks[ block ], |
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| 294 | (information->allocation_size * information->name_length) ), |
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| 295 | information->allocation_size, |
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| 296 | information->size |
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| 297 | ); |
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| 298 | |
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| 299 | /* |
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| 300 | * Move from the local chain, initialise, then append to the inactive chain |
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| 301 | */ |
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| 302 | |
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| 303 | index = index_base; |
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| 304 | |
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| 305 | while ( (the_object = (Objects_Control *) _Chain_Get( &Inactive ) ) != NULL ) { |
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| 306 | |
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| 307 | the_object->id = |
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| 308 | _Objects_Build_id( |
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| 309 | information->the_class, _Objects_Local_node, index |
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| 310 | ); |
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| 311 | |
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| 312 | the_object->name = (void *) name_area; |
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| 313 | |
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| 314 | name_area = _Addresses_Add_offset( name_area, information->name_length ); |
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| 315 | |
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| 316 | _Chain_Append( &information->Inactive, &the_object->Node ); |
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| 317 | |
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| 318 | index++; |
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| 319 | } |
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| 320 | |
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| 321 | information->inactive_per_block[ block ] = information->allocation_size; |
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| 322 | information->inactive += information->allocation_size; |
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| 323 | } |
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| 324 | |
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| 325 | /*PAGE |
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| 326 | * |
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| 327 | * _Objects_Shrink_information |
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| 328 | * |
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| 329 | * This routine shrinks object information related data structures. |
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| 330 | * The object's name and object space are released. The local_table |
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| 331 | * etc block does not shrink. The InActive list needs to be scanned |
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| 332 | * to find the objects are remove them. |
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| 333 | * Input parameters: |
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| 334 | * information - object information table |
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| 335 | * the_block - the block to remove |
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| 336 | * |
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| 337 | * Output parameters: NONE |
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| 338 | */ |
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| 339 | |
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| 340 | void _Objects_Shrink_information( |
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| 341 | Objects_Information *information |
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| 342 | ) |
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| 343 | { |
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| 344 | Objects_Control *the_object; |
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| 345 | Objects_Control *extract_me; |
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| 346 | unsigned32 block_count; |
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| 347 | unsigned32 block; |
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| 348 | unsigned32 index_base; |
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| 349 | unsigned32 index; |
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| 350 | |
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| 351 | /* |
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| 352 | * Search the list to find block or chunnk with all objects inactive. |
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| 353 | */ |
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| 354 | |
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| 355 | index_base = _Objects_Get_index( information->minimum_id ); |
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| 356 | block_count = ( information->maximum - index_base ) / information->allocation_size; |
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| 357 | |
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| 358 | for ( block = 0; block < block_count; block++ ) { |
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| 359 | if ( information->inactive_per_block[ block ] == information->allocation_size ) { |
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| 360 | |
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| 361 | /* |
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| 362 | * XXX - Not to sure how to use a chain where you need to iterate and |
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| 363 | * and remove elements. |
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| 364 | */ |
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| 365 | |
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| 366 | the_object = (Objects_Control *) information->Inactive.first; |
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| 367 | |
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| 368 | /* |
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| 369 | * Assume the Inactive chain is never empty at this point |
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| 370 | */ |
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| 371 | |
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| 372 | do { |
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| 373 | index = _Objects_Get_index( the_object->id ); |
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| 374 | |
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| 375 | if ((index >= index_base) && |
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| 376 | (index < (index_base + information->allocation_size))) { |
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| 377 | |
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| 378 | /* |
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| 379 | * Get the next node before the node is extracted |
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| 380 | */ |
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| 381 | |
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| 382 | extract_me = the_object; |
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| 383 | |
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| 384 | if ( !_Chain_Is_last( &the_object->Node ) ) |
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| 385 | the_object = (Objects_Control *) the_object->Node.next; |
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| 386 | else |
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| 387 | the_object = NULL; |
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| 388 | |
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| 389 | _Chain_Extract( &extract_me->Node ); |
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| 390 | } |
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| 391 | else { |
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| 392 | the_object = (Objects_Control *) the_object->Node.next; |
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| 393 | } |
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| 394 | } |
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| 395 | while ( the_object && !_Chain_Is_last( &the_object->Node ) ); |
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| 396 | |
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| 397 | /* |
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| 398 | * Free the memory and reset the structures in the object' information |
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| 399 | */ |
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| 400 | |
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| 401 | _Workspace_Free( information->object_blocks[ block ] ); |
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| 402 | information->name_table[ block ] = NULL; |
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| 403 | information->object_blocks[ block ] = NULL; |
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| 404 | information->inactive_per_block[ block ] = 0; |
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| 405 | |
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| 406 | information->inactive -= information->allocation_size; |
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| 407 | |
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| 408 | return; |
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| 409 | } |
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| 410 | |
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| 411 | index_base += information->allocation_size; |
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| 412 | } |
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| 413 | } |
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| 414 | |
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[ac7d5ef0] | 415 | /*PAGE |
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| 416 | * |
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| 417 | * _Objects_Initialize_information |
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| 418 | * |
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| 419 | * This routine initializes all object information related data structures. |
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| 420 | * |
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| 421 | * Input parameters: |
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[2cd5444] | 422 | * information - object information table |
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| 423 | * the_class - object class |
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| 424 | * supports_global - TRUE if this is a global object class |
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| 425 | * maximum - maximum objects of this class |
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| 426 | * size - size of this object's control block |
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| 427 | * is_string - TRUE if names for this object are strings |
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| 428 | * maximum_name_length - maximum length of each object's name |
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| 429 | * is_thread - TRUE if this class is threads |
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[ac7d5ef0] | 430 | * |
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| 431 | * Output parameters: NONE |
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| 432 | */ |
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| 433 | |
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| 434 | void _Objects_Initialize_information( |
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| 435 | Objects_Information *information, |
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[9863dbf] | 436 | Objects_Classes the_class, |
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| 437 | boolean supports_global, |
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| 438 | unsigned32 maximum, |
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[3235ad9] | 439 | unsigned32 size, |
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| 440 | boolean is_string, |
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[5250ff39] | 441 | unsigned32 maximum_name_length, |
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| 442 | boolean is_thread |
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[ac7d5ef0] | 443 | ) |
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| 444 | { |
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[6a10709] | 445 | static Objects_Control *null_local_table = NULL; |
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| 446 | |
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[ac7d5ef0] | 447 | unsigned32 minimum_index; |
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| 448 | unsigned32 index; |
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[3235ad9] | 449 | unsigned32 name_length; |
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[5250ff39] | 450 | |
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[f4a8ee1] | 451 | information->the_class = the_class; |
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| 452 | information->is_string = is_string; |
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| 453 | information->is_thread = is_thread; |
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| 454 | |
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| 455 | information->local_table = 0; |
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| 456 | information->name_table = 0; |
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| 457 | information->inactive_per_block = 0; |
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| 458 | information->object_blocks = 0; |
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| 459 | |
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| 460 | information->inactive = 0; |
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| 461 | |
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[5250ff39] | 462 | /* |
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| 463 | * Set the entry in the object information table. |
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| 464 | */ |
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| 465 | |
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| 466 | _Objects_Information_table[ the_class ] = information; |
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[3235ad9] | 467 | |
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| 468 | /* |
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[f4a8ee1] | 469 | * Set the size of the object |
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[3235ad9] | 470 | */ |
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[ac7d5ef0] | 471 | |
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[f4a8ee1] | 472 | information->size = size; |
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| 473 | |
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| 474 | /* |
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| 475 | * Are we operating in unlimited, or auto-extend mode |
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| 476 | */ |
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[ac7d5ef0] | 477 | |
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[f4a8ee1] | 478 | information->auto_extend = (maximum & OBJECTS_UNLIMITED_OBJECTS) ? TRUE : FALSE; |
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[6a10709] | 479 | maximum &= ~OBJECTS_UNLIMITED_OBJECTS; |
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[f4a8ee1] | 480 | |
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| 481 | /* |
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| 482 | * The allocation unit is the maximum value |
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| 483 | */ |
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[ac7d5ef0] | 484 | |
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[f4a8ee1] | 485 | information->allocation_size = maximum; |
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[ac7d5ef0] | 486 | |
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[6a10709] | 487 | /* |
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| 488 | * Provide a null local table entry for the case of any empty table. |
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| 489 | */ |
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| 490 | |
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| 491 | information->local_table = &null_local_table; |
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| 492 | |
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[3235ad9] | 493 | /* |
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[f4a8ee1] | 494 | * Calculate minimum and maximum Id's |
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[3235ad9] | 495 | */ |
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| 496 | |
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[f4a8ee1] | 497 | if ( maximum == 0 ) minimum_index = 0; |
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| 498 | else minimum_index = 1; |
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| 499 | |
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| 500 | information->minimum_id = |
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| 501 | _Objects_Build_id( the_class, _Objects_Local_node, minimum_index ); |
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[ac7d5ef0] | 502 | |
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[3235ad9] | 503 | /* |
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[f4a8ee1] | 504 | * Calculate the maximum name length |
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[3235ad9] | 505 | */ |
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| 506 | |
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| 507 | name_length = maximum_name_length; |
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| 508 | |
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[6a10709] | 509 | if ( name_length & (OBJECTS_NAME_ALIGNMENT-1) ) |
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[3235ad9] | 510 | name_length = (name_length + OBJECTS_NAME_ALIGNMENT) & |
---|
| 511 | ~(OBJECTS_NAME_ALIGNMENT-1); |
---|
| 512 | |
---|
| 513 | information->name_length = name_length; |
---|
| 514 | |
---|
[f4a8ee1] | 515 | _Chain_Initialize_empty( &information->Inactive ); |
---|
| 516 | |
---|
[3235ad9] | 517 | /* |
---|
| 518 | * Initialize objects .. if there are any |
---|
| 519 | */ |
---|
| 520 | |
---|
[f4a8ee1] | 521 | if ( maximum ) { |
---|
[ac7d5ef0] | 522 | |
---|
[f4a8ee1] | 523 | /* |
---|
| 524 | * Reset the maximum value. It will be updated when the information is |
---|
| 525 | * extended. |
---|
| 526 | */ |
---|
| 527 | |
---|
| 528 | information->maximum = 0; |
---|
| 529 | |
---|
| 530 | /* |
---|
| 531 | * Always have the maximum size available so the current performance |
---|
| 532 | * figures are create are met. If the user moves past the maximum |
---|
| 533 | * number then a performance hit is taken. |
---|
| 534 | */ |
---|
| 535 | |
---|
| 536 | _Objects_Extend_information( information ); |
---|
| 537 | |
---|
[ac7d5ef0] | 538 | } |
---|
| 539 | |
---|
[3235ad9] | 540 | /* |
---|
| 541 | * Take care of multiprocessing |
---|
| 542 | */ |
---|
[ac7d5ef0] | 543 | |
---|
[3a4ae6c] | 544 | if ( supports_global == TRUE && _System_state_Is_multiprocessing ) { |
---|
[ac7d5ef0] | 545 | |
---|
[1019ae4] | 546 | information->global_table = |
---|
| 547 | (Chain_Control *) _Workspace_Allocate_or_fatal_error( |
---|
| 548 | (_Objects_Maximum_nodes + 1) * sizeof(Chain_Control) |
---|
| 549 | ); |
---|
[3235ad9] | 550 | |
---|
[3a4ae6c] | 551 | for ( index=1; index <= _Objects_Maximum_nodes ; index++ ) |
---|
[3235ad9] | 552 | _Chain_Initialize_empty( &information->global_table[ index ] ); |
---|
| 553 | } |
---|
| 554 | else |
---|
| 555 | information->global_table = NULL; |
---|
| 556 | } |
---|
| 557 | |
---|
[f4a8ee1] | 558 | /*PAGE |
---|
| 559 | * |
---|
| 560 | * _Objects_Allocate |
---|
| 561 | * |
---|
| 562 | * DESCRIPTION: |
---|
| 563 | * |
---|
| 564 | * This function allocates a object control block from |
---|
| 565 | * the inactive chain of free object control blocks. |
---|
| 566 | */ |
---|
| 567 | |
---|
| 568 | Objects_Control *_Objects_Allocate( |
---|
| 569 | Objects_Information *information |
---|
| 570 | ) |
---|
| 571 | { |
---|
| 572 | Objects_Control *the_object = |
---|
| 573 | (Objects_Control *) _Chain_Get( &information->Inactive ); |
---|
| 574 | |
---|
| 575 | if ( information->auto_extend ) { |
---|
| 576 | /* |
---|
| 577 | * If the list is empty then we are out of objects and need to |
---|
| 578 | * extend information base. |
---|
| 579 | */ |
---|
| 580 | |
---|
| 581 | if ( !the_object ) { |
---|
| 582 | _Objects_Extend_information( information ); |
---|
| 583 | the_object = (Objects_Control *) _Chain_Get( &information->Inactive ); |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | if ( the_object ) { |
---|
| 587 | unsigned32 block; |
---|
| 588 | |
---|
[2cd5444] | 589 | block = _Objects_Get_index( the_object->id ) - |
---|
| 590 | _Objects_Get_index( information->minimum_id ); |
---|
[f4a8ee1] | 591 | block /= information->allocation_size; |
---|
| 592 | |
---|
| 593 | information->inactive_per_block[ block ]--; |
---|
| 594 | information->inactive--; |
---|
| 595 | } |
---|
| 596 | } |
---|
| 597 | |
---|
| 598 | return the_object; |
---|
| 599 | } |
---|
| 600 | |
---|
[2cd5444] | 601 | /*PAGE |
---|
| 602 | * |
---|
| 603 | * _Objects_Allocate_by_index |
---|
| 604 | * |
---|
| 605 | * DESCRIPTION: |
---|
| 606 | * |
---|
| 607 | * This function allocates the object control block |
---|
| 608 | * specified by the index from the inactive chain of |
---|
| 609 | * free object control blocks. |
---|
| 610 | */ |
---|
| 611 | |
---|
| 612 | Objects_Control *_Objects_Allocate_by_index( |
---|
| 613 | Objects_Information *information, |
---|
| 614 | unsigned32 index, |
---|
| 615 | unsigned32 sizeof_control |
---|
| 616 | ) |
---|
| 617 | { |
---|
| 618 | Objects_Control *the_object; |
---|
| 619 | void *p; |
---|
| 620 | |
---|
| 621 | if ( index && information->maximum >= index ) { |
---|
| 622 | the_object = _Objects_Get_local_object( information, index ); |
---|
| 623 | if ( the_object ) |
---|
| 624 | return NULL; |
---|
| 625 | |
---|
| 626 | /* XXX |
---|
| 627 | * This whole section of code needs to be addressed. |
---|
| 628 | * + The 0 should be dealt with more properly so we can autoextend. |
---|
| 629 | * + The pointer arithmetic is probably too expensive. |
---|
| 630 | * + etc. |
---|
| 631 | */ |
---|
| 632 | |
---|
| 633 | p = _Addresses_Add_offset( information->object_blocks[ 0 ], |
---|
| 634 | (information->allocation_size * information->name_length) ), |
---|
| 635 | |
---|
| 636 | p = _Addresses_Add_offset( p, (sizeof_control * (index - 1)) ); |
---|
| 637 | the_object = (Objects_Control *)p; |
---|
| 638 | _Chain_Extract( &the_object->Node ); |
---|
| 639 | |
---|
| 640 | return the_object; |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | /* |
---|
| 644 | * Autoextend will have to be thought out as it applies |
---|
| 645 | * to user assigned indices. |
---|
| 646 | */ |
---|
| 647 | |
---|
| 648 | return NULL; |
---|
| 649 | } |
---|
| 650 | |
---|
| 651 | |
---|
| 652 | |
---|
[f4a8ee1] | 653 | /*PAGE |
---|
| 654 | * |
---|
| 655 | * _Objects_Free |
---|
| 656 | * |
---|
| 657 | * DESCRIPTION: |
---|
| 658 | * |
---|
| 659 | * This function frees a object control block to the |
---|
| 660 | * inactive chain of free object control blocks. |
---|
| 661 | */ |
---|
| 662 | |
---|
| 663 | void _Objects_Free( |
---|
| 664 | Objects_Information *information, |
---|
| 665 | Objects_Control *the_object |
---|
| 666 | ) |
---|
| 667 | { |
---|
| 668 | unsigned32 allocation_size = information->allocation_size; |
---|
| 669 | |
---|
| 670 | _Chain_Append( &information->Inactive, &the_object->Node ); |
---|
| 671 | |
---|
| 672 | if ( information->auto_extend ) { |
---|
| 673 | unsigned32 block; |
---|
| 674 | |
---|
| 675 | block = |
---|
| 676 | _Objects_Get_index( the_object->id ) - _Objects_Get_index( information->minimum_id ); |
---|
| 677 | block /= information->allocation_size; |
---|
| 678 | |
---|
| 679 | information->inactive_per_block[ block ]++; |
---|
| 680 | information->inactive++; |
---|
| 681 | |
---|
| 682 | /* |
---|
| 683 | * Check if the threshold level has been met of |
---|
| 684 | * 1.5 x allocation_size are free. |
---|
| 685 | */ |
---|
| 686 | |
---|
| 687 | if ( information->inactive > ( allocation_size + ( allocation_size >> 1 ) ) ) { |
---|
| 688 | _Objects_Shrink_information( information ); |
---|
| 689 | } |
---|
| 690 | } |
---|
| 691 | } |
---|
| 692 | |
---|
[3235ad9] | 693 | /*PAGE |
---|
| 694 | * |
---|
| 695 | * _Objects_Clear_name |
---|
| 696 | * |
---|
| 697 | * XXX |
---|
| 698 | */ |
---|
| 699 | |
---|
| 700 | void _Objects_Clear_name( |
---|
| 701 | void *name, |
---|
| 702 | unsigned32 length |
---|
| 703 | ) |
---|
| 704 | { |
---|
| 705 | unsigned32 index; |
---|
| 706 | unsigned32 maximum = length / OBJECTS_NAME_ALIGNMENT; |
---|
[1019ae4] | 707 | unsigned32 *name_ptr = (unsigned32 *) name; |
---|
[3235ad9] | 708 | |
---|
| 709 | for ( index=0 ; index < maximum ; index++ ) |
---|
| 710 | *name_ptr++ = 0; |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | /*PAGE |
---|
| 714 | * |
---|
| 715 | * _Objects_Copy_name_string |
---|
| 716 | * |
---|
| 717 | * XXX |
---|
| 718 | */ |
---|
| 719 | |
---|
| 720 | void _Objects_Copy_name_string( |
---|
| 721 | void *source, |
---|
| 722 | void *destination |
---|
| 723 | ) |
---|
| 724 | { |
---|
[1019ae4] | 725 | unsigned8 *source_p = (unsigned8 *) source; |
---|
| 726 | unsigned8 *destination_p = (unsigned8 *) destination; |
---|
[3235ad9] | 727 | |
---|
| 728 | do { |
---|
| 729 | *destination_p++ = *source_p; |
---|
| 730 | } while ( *source_p++ ); |
---|
| 731 | } |
---|
| 732 | |
---|
| 733 | /*PAGE |
---|
| 734 | * |
---|
| 735 | * _Objects_Copy_name_raw |
---|
| 736 | * |
---|
| 737 | * XXX |
---|
| 738 | */ |
---|
| 739 | |
---|
| 740 | void _Objects_Copy_name_raw( |
---|
| 741 | void *source, |
---|
| 742 | void *destination, |
---|
| 743 | unsigned32 length |
---|
| 744 | ) |
---|
| 745 | { |
---|
[1019ae4] | 746 | unsigned32 *source_p = (unsigned32 *) source; |
---|
| 747 | unsigned32 *destination_p = (unsigned32 *) destination; |
---|
[3235ad9] | 748 | unsigned32 tmp_length = length / OBJECTS_NAME_ALIGNMENT; |
---|
| 749 | |
---|
| 750 | while ( tmp_length-- ) |
---|
| 751 | *destination_p++ = *source_p++; |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | /*PAGE |
---|
| 755 | * |
---|
| 756 | * _Objects_Compare_name_string |
---|
| 757 | * |
---|
| 758 | * XXX |
---|
| 759 | */ |
---|
| 760 | |
---|
| 761 | boolean _Objects_Compare_name_string( |
---|
| 762 | void *name_1, |
---|
| 763 | void *name_2, |
---|
| 764 | unsigned32 length |
---|
| 765 | ) |
---|
| 766 | { |
---|
[1019ae4] | 767 | unsigned8 *name_1_p = (unsigned8 *) name_1; |
---|
| 768 | unsigned8 *name_2_p = (unsigned8 *) name_2; |
---|
[3235ad9] | 769 | unsigned32 tmp_length = length; |
---|
| 770 | |
---|
| 771 | do { |
---|
| 772 | if ( *name_1_p++ != *name_2_p++ ) |
---|
| 773 | return FALSE; |
---|
| 774 | if ( !tmp_length-- ) |
---|
| 775 | return FALSE; |
---|
| 776 | } while ( *name_1_p ); |
---|
| 777 | |
---|
| 778 | return TRUE; |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | /*PAGE |
---|
| 782 | * |
---|
| 783 | * _Objects_Compare_name_raw |
---|
| 784 | * |
---|
| 785 | * XXX |
---|
| 786 | */ |
---|
| 787 | |
---|
| 788 | boolean _Objects_Compare_name_raw( |
---|
| 789 | void *name_1, |
---|
| 790 | void *name_2, |
---|
| 791 | unsigned32 length |
---|
| 792 | ) |
---|
| 793 | { |
---|
[1019ae4] | 794 | unsigned32 *name_1_p = (unsigned32 *) name_1; |
---|
| 795 | unsigned32 *name_2_p = (unsigned32 *) name_2; |
---|
[3235ad9] | 796 | unsigned32 tmp_length = length / OBJECTS_NAME_ALIGNMENT; |
---|
| 797 | |
---|
| 798 | while ( tmp_length-- ) |
---|
| 799 | if ( *name_1_p++ != *name_2_p++ ) |
---|
| 800 | return FALSE; |
---|
| 801 | |
---|
| 802 | return TRUE; |
---|
[ac7d5ef0] | 803 | } |
---|
| 804 | |
---|
[3235ad9] | 805 | |
---|
[ac7d5ef0] | 806 | /*PAGE |
---|
| 807 | * |
---|
| 808 | * _Objects_Name_to_id |
---|
| 809 | * |
---|
| 810 | * These kernel routines search the object table(s) for the given |
---|
| 811 | * object name and returns the associated object id. |
---|
| 812 | * |
---|
| 813 | * Input parameters: |
---|
| 814 | * information - object information |
---|
| 815 | * name - user defined object name |
---|
| 816 | * node - node indentifier (0 indicates any node) |
---|
| 817 | * id - address of return ID |
---|
| 818 | * |
---|
| 819 | * Output parameters: |
---|
[3a4ae6c] | 820 | * id - object id |
---|
| 821 | * OBJECTS_SUCCESSFUL - if successful |
---|
| 822 | * error code - if unsuccessful |
---|
[ac7d5ef0] | 823 | */ |
---|
| 824 | |
---|
[3a4ae6c] | 825 | Objects_Name_to_id_errors _Objects_Name_to_id( |
---|
[ac7d5ef0] | 826 | Objects_Information *information, |
---|
[3235ad9] | 827 | Objects_Name name, |
---|
| 828 | unsigned32 node, |
---|
| 829 | Objects_Id *id |
---|
[ac7d5ef0] | 830 | ) |
---|
| 831 | { |
---|
[3235ad9] | 832 | boolean search_local_node; |
---|
| 833 | Objects_Control *the_object; |
---|
| 834 | unsigned32 index; |
---|
| 835 | unsigned32 name_length; |
---|
| 836 | Objects_Name_comparators compare_them; |
---|
[ac7d5ef0] | 837 | |
---|
| 838 | if ( name == 0 ) |
---|
[3a4ae6c] | 839 | return OBJECTS_INVALID_NAME; |
---|
[ac7d5ef0] | 840 | |
---|
[61361688] | 841 | search_local_node = FALSE; |
---|
| 842 | |
---|
| 843 | if ( information->maximum != 0 && |
---|
[3a4ae6c] | 844 | (node == OBJECTS_SEARCH_ALL_NODES || node == OBJECTS_SEARCH_LOCAL_NODE || |
---|
[61361688] | 845 | _Objects_Is_local_node( node ) ) ) |
---|
| 846 | search_local_node = TRUE; |
---|
| 847 | |
---|
| 848 | if ( search_local_node ) { |
---|
[3235ad9] | 849 | name_length = information->name_length; |
---|
| 850 | |
---|
| 851 | if ( information->is_string ) compare_them = _Objects_Compare_name_string; |
---|
| 852 | else compare_them = _Objects_Compare_name_raw; |
---|
| 853 | |
---|
[61361688] | 854 | for ( index = 1; index <= information->maximum; index++ ) { |
---|
| 855 | |
---|
[f4a8ee1] | 856 | the_object = information->local_table[ index ]; |
---|
[61361688] | 857 | |
---|
| 858 | if ( !the_object || !the_object->name ) |
---|
| 859 | continue; |
---|
| 860 | |
---|
[3235ad9] | 861 | if ( (*compare_them)( name, the_object->name, name_length ) ) { |
---|
[61361688] | 862 | *id = the_object->id; |
---|
[3a4ae6c] | 863 | return OBJECTS_SUCCESSFUL; |
---|
[ac7d5ef0] | 864 | } |
---|
[61361688] | 865 | } |
---|
[ac7d5ef0] | 866 | } |
---|
| 867 | |
---|
[3a4ae6c] | 868 | if ( _Objects_Is_local_node( node ) || node == OBJECTS_SEARCH_LOCAL_NODE ) |
---|
| 869 | return OBJECTS_INVALID_NAME; |
---|
[ac7d5ef0] | 870 | |
---|
[97e2729d] | 871 | #if defined(RTEMS_MULTIPROCESSING) |
---|
[ac7d5ef0] | 872 | return ( _Objects_MP_Global_name_search( information, name, node, id ) ); |
---|
[97e2729d] | 873 | #else |
---|
| 874 | return OBJECTS_INVALID_NAME; |
---|
| 875 | #endif |
---|
[ac7d5ef0] | 876 | } |
---|
| 877 | |
---|
| 878 | /*PAGE |
---|
| 879 | * |
---|
| 880 | * _Objects_Get |
---|
| 881 | * |
---|
| 882 | * This routine sets the object pointer for the given |
---|
| 883 | * object id based on the given object information structure. |
---|
| 884 | * |
---|
| 885 | * Input parameters: |
---|
| 886 | * information - pointer to entry in table for this class |
---|
| 887 | * id - object id to search for |
---|
| 888 | * location - address of where to store the location |
---|
| 889 | * |
---|
| 890 | * Output parameters: |
---|
[2cd5444] | 891 | * returns - address of object if local |
---|
| 892 | * location - one of the following: |
---|
[ac7d5ef0] | 893 | * OBJECTS_ERROR - invalid object ID |
---|
| 894 | * OBJECTS_REMOTE - remote object |
---|
| 895 | * OBJECTS_LOCAL - local object |
---|
| 896 | */ |
---|
| 897 | |
---|
| 898 | Objects_Control *_Objects_Get( |
---|
| 899 | Objects_Information *information, |
---|
[5250ff39] | 900 | Objects_Id id, |
---|
| 901 | Objects_Locations *location |
---|
[ac7d5ef0] | 902 | ) |
---|
| 903 | { |
---|
| 904 | Objects_Control *the_object; |
---|
| 905 | unsigned32 index; |
---|
| 906 | |
---|
[f4a8ee1] | 907 | index = _Objects_Get_index( id ); |
---|
[9863dbf] | 908 | |
---|
[ac7d5ef0] | 909 | if ( information->maximum >= index ) { |
---|
| 910 | _Thread_Disable_dispatch(); |
---|
[f4a8ee1] | 911 | if ( (the_object = _Objects_Get_local_object( information, index )) != NULL ) { |
---|
[ac7d5ef0] | 912 | *location = OBJECTS_LOCAL; |
---|
| 913 | return( the_object ); |
---|
| 914 | } |
---|
| 915 | _Thread_Enable_dispatch(); |
---|
| 916 | *location = OBJECTS_ERROR; |
---|
| 917 | return( NULL ); |
---|
| 918 | } |
---|
| 919 | *location = OBJECTS_ERROR; |
---|
[97e2729d] | 920 | #if defined(RTEMS_MULTIPROCESSING) |
---|
[2cd5444] | 921 | _Objects_MP_Is_remote( |
---|
| 922 | information, |
---|
| 923 | _Objects_Build_id( information->the_class, _Objects_Local_node, index ), |
---|
| 924 | location, |
---|
| 925 | &the_object |
---|
| 926 | ); |
---|
[ac7d5ef0] | 927 | return the_object; |
---|
[97e2729d] | 928 | #else |
---|
| 929 | return NULL; |
---|
| 930 | #endif |
---|
[ac7d5ef0] | 931 | } |
---|
[b06e68ef] | 932 | |
---|
[2cd5444] | 933 | /*PAGE |
---|
| 934 | * |
---|
| 935 | * _Objects_Get_by_index |
---|
| 936 | * |
---|
| 937 | * This routine sets the object pointer for the given |
---|
| 938 | * object id based on the given object information structure. |
---|
| 939 | * |
---|
| 940 | * Input parameters: |
---|
| 941 | * information - pointer to entry in table for this class |
---|
| 942 | * index - object index to check for |
---|
| 943 | * location - address of where to store the location |
---|
| 944 | * |
---|
| 945 | * Output parameters: |
---|
| 946 | * returns - address of object if local |
---|
| 947 | * location - one of the following: |
---|
| 948 | * OBJECTS_ERROR - invalid object ID |
---|
| 949 | * OBJECTS_REMOTE - remote object |
---|
| 950 | * OBJECTS_LOCAL - local object |
---|
| 951 | */ |
---|
| 952 | |
---|
| 953 | Objects_Control *_Objects_Get_by_index( |
---|
| 954 | Objects_Information *information, |
---|
| 955 | unsigned32 index, |
---|
| 956 | Objects_Locations *location |
---|
| 957 | ) |
---|
| 958 | { |
---|
| 959 | Objects_Control *the_object; |
---|
| 960 | |
---|
| 961 | if ( information->maximum >= index ) { |
---|
| 962 | _Thread_Disable_dispatch(); |
---|
| 963 | if ( (the_object = _Objects_Get_local_object( information, index )) != NULL ) { |
---|
| 964 | *location = OBJECTS_LOCAL; |
---|
| 965 | return( the_object ); |
---|
| 966 | } |
---|
| 967 | _Thread_Enable_dispatch(); |
---|
| 968 | *location = OBJECTS_ERROR; |
---|
| 969 | return( NULL ); |
---|
| 970 | } |
---|
| 971 | |
---|
| 972 | /* |
---|
| 973 | * With just an index, you can't access a remote object. |
---|
| 974 | */ |
---|
| 975 | |
---|
| 976 | _Thread_Enable_dispatch(); |
---|
| 977 | *location = OBJECTS_ERROR; |
---|
| 978 | return NULL; |
---|
| 979 | } |
---|
[b06e68ef] | 980 | |
---|
| 981 | /*PAGE |
---|
| 982 | * |
---|
| 983 | * _Objects_Get_next |
---|
| 984 | * |
---|
| 985 | * Like _Objects_Get, but considers the 'id' as a "hint" and |
---|
| 986 | * finds next valid one after that point. |
---|
| 987 | * Mostly used for monitor and debug traversal of an object. |
---|
| 988 | * |
---|
| 989 | * Input parameters: |
---|
| 990 | * information - pointer to entry in table for this class |
---|
| 991 | * id - object id to search for |
---|
| 992 | * location - address of where to store the location |
---|
| 993 | * next_id - address to store next id to try |
---|
| 994 | * |
---|
| 995 | * Output parameters: |
---|
| 996 | * returns - address of object if local |
---|
| 997 | * location - one of the following: |
---|
| 998 | * OBJECTS_ERROR - invalid object ID |
---|
| 999 | * OBJECTS_REMOTE - remote object |
---|
| 1000 | * OBJECTS_LOCAL - local object |
---|
| 1001 | * next_id - will contain a reasonable "next" id to continue traversal |
---|
| 1002 | * |
---|
| 1003 | * NOTE: |
---|
| 1004 | * assumes can add '1' to an id to get to next index. |
---|
| 1005 | */ |
---|
| 1006 | |
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| 1007 | Objects_Control * |
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| 1008 | _Objects_Get_next( |
---|
| 1009 | Objects_Information *information, |
---|
| 1010 | Objects_Id id, |
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[56e0b88] | 1011 | Objects_Locations *location_p, |
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[b06e68ef] | 1012 | Objects_Id *next_id_p |
---|
| 1013 | ) |
---|
| 1014 | { |
---|
| 1015 | Objects_Control *object; |
---|
| 1016 | Objects_Id next_id; |
---|
| 1017 | |
---|
[3a4ae6c] | 1018 | if (_Objects_Get_index(id) == OBJECTS_ID_INITIAL_INDEX) |
---|
[b06e68ef] | 1019 | next_id = information->minimum_id; |
---|
| 1020 | else |
---|
| 1021 | next_id = id; |
---|
| 1022 | |
---|
| 1023 | do { |
---|
| 1024 | /* walked off end of list? */ |
---|
[3a4ae6c] | 1025 | if (_Objects_Get_index(next_id) > information->maximum) |
---|
[b06e68ef] | 1026 | { |
---|
| 1027 | *location_p = OBJECTS_ERROR; |
---|
| 1028 | goto final; |
---|
| 1029 | } |
---|
| 1030 | |
---|
| 1031 | /* try to grab one */ |
---|
| 1032 | object = _Objects_Get(information, next_id, location_p); |
---|
| 1033 | |
---|
| 1034 | next_id++; |
---|
| 1035 | |
---|
| 1036 | } while (*location_p != OBJECTS_LOCAL); |
---|
| 1037 | |
---|
| 1038 | *next_id_p = next_id; |
---|
| 1039 | return object; |
---|
| 1040 | |
---|
| 1041 | final: |
---|
[3a4ae6c] | 1042 | *next_id_p = OBJECTS_ID_FINAL; |
---|
[b06e68ef] | 1043 | return 0; |
---|
| 1044 | } |
---|
[7f6a24ab] | 1045 | |
---|