[ac7d5ef0] | 1 | /* |
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| 2 | * Region Manager |
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| 3 | * |
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| 4 | * |
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[03f2154e] | 5 | * COPYRIGHT (c) 1989-1997. |
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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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| 15 | |
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| 16 | #include <rtems/system.h> |
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[3a4ae6c] | 17 | #include <rtems/rtems/status.h> |
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| 18 | #include <rtems/rtems/support.h> |
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[5e9b32b] | 19 | #include <rtems/score/object.h> |
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[3a4ae6c] | 20 | #include <rtems/rtems/options.h> |
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| 21 | #include <rtems/rtems/region.h> |
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[5e9b32b] | 22 | #include <rtems/score/states.h> |
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| 23 | #include <rtems/score/thread.h> |
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[ac7d5ef0] | 24 | |
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| 25 | /*PAGE |
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| 26 | * |
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| 27 | * _Region_Manager_initialization |
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| 28 | * |
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| 29 | * This routine initializes all region manager related data structures. |
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| 30 | * |
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| 31 | * Input parameters: |
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| 32 | * maximum_regions - number of regions to initialize |
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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 _Region_Manager_initialization( |
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| 38 | unsigned32 maximum_regions |
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| 39 | ) |
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| 40 | { |
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| 41 | _Objects_Initialize_information( |
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[3235ad9] | 42 | &_Region_Information, |
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| 43 | OBJECTS_RTEMS_REGIONS, |
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| 44 | FALSE, |
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| 45 | maximum_regions, |
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| 46 | sizeof( Region_Control ), |
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| 47 | FALSE, |
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[5250ff39] | 48 | RTEMS_MAXIMUM_NAME_LENGTH, |
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| 49 | FALSE |
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[3235ad9] | 50 | ); |
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[3a4ae6c] | 51 | |
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| 52 | /* |
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| 53 | * Register the MP Process Packet routine. |
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| 54 | */ |
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| 55 | |
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| 56 | _MPCI_Register_packet_processor( |
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| 57 | MP_PACKET_REGION, |
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| 58 | 0 /* XXX _Region_MP_Process_packet */ |
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| 59 | ); |
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| 60 | |
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[ac7d5ef0] | 61 | } |
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| 62 | |
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| 63 | /*PAGE |
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| 64 | * |
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| 65 | * rtems_region_create |
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| 66 | * |
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| 67 | * This directive creates a region of physical contiguous memory area |
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| 68 | * from which variable sized segments can be allocated. |
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| 69 | * |
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| 70 | * Input parameters: |
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| 71 | * name - user defined region name |
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| 72 | * starting_address - physical start address of region |
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| 73 | * length - physical length in bytes |
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| 74 | * page_size - page size in bytes |
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| 75 | * attribute_set - region attributes |
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| 76 | * id - address of region id to set |
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| 77 | * |
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| 78 | * Output parameters: |
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| 79 | * id - region id |
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| 80 | * RTEMS_SUCCESSFUL - if successful |
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| 81 | * error code - if unsuccessful |
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| 82 | */ |
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| 83 | |
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| 84 | rtems_status_code rtems_region_create( |
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[3235ad9] | 85 | rtems_name name, |
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[ac7d5ef0] | 86 | void *starting_address, |
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| 87 | unsigned32 length, |
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| 88 | unsigned32 page_size, |
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| 89 | rtems_attribute attribute_set, |
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| 90 | Objects_Id *id |
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| 91 | ) |
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| 92 | { |
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| 93 | Region_Control *the_region; |
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| 94 | |
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[3235ad9] | 95 | if ( !rtems_is_name_valid( name ) ) |
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[3a4ae6c] | 96 | return RTEMS_INVALID_NAME; |
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[ac7d5ef0] | 97 | |
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| 98 | if ( !_Addresses_Is_aligned( starting_address ) ) |
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[3a4ae6c] | 99 | return RTEMS_INVALID_ADDRESS; |
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[ac7d5ef0] | 100 | |
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| 101 | _Thread_Disable_dispatch(); /* to prevent deletion */ |
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| 102 | |
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| 103 | the_region = _Region_Allocate(); |
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| 104 | |
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| 105 | if ( !the_region ) { |
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| 106 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 107 | return RTEMS_TOO_MANY; |
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[ac7d5ef0] | 108 | } |
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| 109 | |
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| 110 | the_region->maximum_segment_size = |
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| 111 | _Heap_Initialize(&the_region->Memory, starting_address, length, page_size); |
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| 112 | |
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| 113 | if ( !the_region->maximum_segment_size ) { |
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| 114 | _Region_Free( the_region ); |
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| 115 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 116 | return RTEMS_INVALID_SIZE; |
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[ac7d5ef0] | 117 | } |
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| 118 | |
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| 119 | the_region->starting_address = starting_address; |
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| 120 | the_region->length = length; |
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| 121 | the_region->page_size = page_size; |
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| 122 | the_region->attribute_set = attribute_set; |
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| 123 | the_region->number_of_used_blocks = 0; |
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| 124 | |
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| 125 | _Thread_queue_Initialize( |
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[7f6a24ab] | 126 | &the_region->Wait_queue, |
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| 127 | OBJECTS_RTEMS_REGIONS, |
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| 128 | _Attributes_Is_priority( attribute_set ) ? |
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| 129 | THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO, |
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| 130 | STATES_WAITING_FOR_SEGMENT, |
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[3a4ae6c] | 131 | _Region_MP_Send_extract_proxy, |
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| 132 | RTEMS_TIMEOUT |
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[7f6a24ab] | 133 | ); |
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[ac7d5ef0] | 134 | |
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[3235ad9] | 135 | _Objects_Open( &_Region_Information, &the_region->Object, &name ); |
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[ac7d5ef0] | 136 | |
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| 137 | *id = the_region->Object.id; |
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| 138 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 139 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 140 | } |
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| 141 | |
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| 142 | /*PAGE |
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| 143 | * |
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| 144 | * rtems_region_ident |
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| 145 | * |
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| 146 | * This directive returns the system ID associated with |
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| 147 | * the region name. |
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| 148 | * |
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| 149 | * Input parameters: |
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| 150 | * name - user defined region name |
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| 151 | * id - pointer to region id |
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| 152 | * |
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| 153 | * Output parameters: |
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| 154 | * *id - region id |
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| 155 | * RTEMS_SUCCESSFUL - if successful |
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| 156 | * error code - if unsuccessful |
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| 157 | */ |
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| 158 | |
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| 159 | rtems_status_code rtems_region_ident( |
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[3235ad9] | 160 | rtems_name name, |
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[ac7d5ef0] | 161 | Objects_Id *id |
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| 162 | ) |
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| 163 | { |
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[3a4ae6c] | 164 | Objects_Name_to_id_errors status; |
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| 165 | |
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| 166 | status = _Objects_Name_to_id( |
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| 167 | &_Region_Information, |
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| 168 | &name, |
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| 169 | OBJECTS_SEARCH_LOCAL_NODE, |
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| 170 | id |
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| 171 | ); |
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| 172 | |
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| 173 | return _Status_Object_name_errors_to_status[ status ]; |
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[ac7d5ef0] | 174 | } |
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| 175 | |
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| 176 | /*PAGE |
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| 177 | * |
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| 178 | * rtems_region_delete |
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| 179 | * |
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| 180 | * This directive allows a thread to delete a region specified by |
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| 181 | * the region identifier, provided that none of its segments are |
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| 182 | * still allocated. |
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| 183 | * |
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| 184 | * Input parameters: |
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| 185 | * id - region id |
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| 186 | * |
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| 187 | * Output parameters: |
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| 188 | * RTEMS_SUCCESSFUL - if successful |
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| 189 | * error code - if unsuccessful |
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| 190 | */ |
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| 191 | |
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| 192 | rtems_status_code rtems_region_delete( |
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| 193 | Objects_Id id |
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| 194 | ) |
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| 195 | { |
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| 196 | register Region_Control *the_region; |
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| 197 | Objects_Locations location; |
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| 198 | |
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| 199 | the_region = _Region_Get( id, &location ); |
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| 200 | switch ( location ) { |
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| 201 | case OBJECTS_ERROR: |
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[3a4ae6c] | 202 | return RTEMS_INVALID_ID; |
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[ac7d5ef0] | 203 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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[3a4ae6c] | 204 | return RTEMS_INTERNAL_ERROR; |
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[ac7d5ef0] | 205 | case OBJECTS_LOCAL: |
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| 206 | _Region_Debug_Walk( the_region, 5 ); |
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| 207 | if ( the_region->number_of_used_blocks == 0 ) { |
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| 208 | _Objects_Close( &_Region_Information, &the_region->Object ); |
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| 209 | _Region_Free( the_region ); |
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| 210 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 211 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 212 | } |
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| 213 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 214 | return RTEMS_RESOURCE_IN_USE; |
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[ac7d5ef0] | 215 | } |
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| 216 | |
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[3a4ae6c] | 217 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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[ac7d5ef0] | 218 | } |
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| 219 | |
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| 220 | /*PAGE |
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| 221 | * |
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| 222 | * rtems_region_extend |
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| 223 | * |
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| 224 | * This directive attempts to grow a region of physical contiguous memory area |
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| 225 | * from which variable sized segments can be allocated. |
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| 226 | * |
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| 227 | * Input parameters: |
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| 228 | * id - id of region to grow |
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| 229 | * start - starting address of memory area for extension |
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| 230 | * length - physical length in bytes to grow the region |
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| 231 | * |
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| 232 | * Output parameters: |
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| 233 | * RTEMS_SUCCESSFUL - if successful |
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| 234 | * error code - if unsuccessful |
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| 235 | */ |
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| 236 | |
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| 237 | rtems_status_code rtems_region_extend( |
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| 238 | Objects_Id id, |
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| 239 | void *starting_address, |
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| 240 | unsigned32 length |
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| 241 | ) |
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| 242 | { |
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| 243 | Region_Control *the_region; |
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| 244 | Objects_Locations location; |
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| 245 | unsigned32 amount_extended; |
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| 246 | Heap_Extend_status heap_status; |
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| 247 | rtems_status_code status; |
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| 248 | |
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| 249 | status = RTEMS_SUCCESSFUL; |
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| 250 | |
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| 251 | the_region = _Region_Get( id, &location ); |
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| 252 | switch ( location ) { |
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| 253 | case OBJECTS_ERROR: |
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[3a4ae6c] | 254 | return RTEMS_INVALID_ID; |
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[ac7d5ef0] | 255 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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[3a4ae6c] | 256 | return RTEMS_INTERNAL_ERROR; |
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[ac7d5ef0] | 257 | case OBJECTS_LOCAL: |
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| 258 | |
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| 259 | heap_status = _Heap_Extend( |
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| 260 | &the_region->Memory, |
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| 261 | starting_address, |
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| 262 | length, |
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| 263 | &amount_extended |
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| 264 | ); |
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| 265 | |
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| 266 | switch ( heap_status ) { |
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| 267 | case HEAP_EXTEND_SUCCESSFUL: |
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| 268 | the_region->length += amount_extended; |
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| 269 | the_region->maximum_segment_size += amount_extended; |
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| 270 | break; |
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| 271 | case HEAP_EXTEND_ERROR: |
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| 272 | status = RTEMS_INVALID_ADDRESS; |
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| 273 | break; |
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| 274 | case HEAP_EXTEND_NOT_IMPLEMENTED: |
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| 275 | status = RTEMS_NOT_IMPLEMENTED; |
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| 276 | break; |
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| 277 | } |
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| 278 | _Thread_Enable_dispatch(); |
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| 279 | return( status ); |
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| 280 | } |
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| 281 | |
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[3a4ae6c] | 282 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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[ac7d5ef0] | 283 | } |
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| 284 | |
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| 285 | /*PAGE |
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| 286 | * |
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| 287 | * rtems_region_get_segment |
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| 288 | * |
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| 289 | * This directive will obtain a segment from the given region. |
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| 290 | * |
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| 291 | * Input parameters: |
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| 292 | * id - region id |
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| 293 | * size - segment size in bytes |
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| 294 | * option_set - wait option |
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| 295 | * timeout - number of ticks to wait (0 means wait forever) |
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| 296 | * segment - pointer to segment address |
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| 297 | * |
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| 298 | * Output parameters: |
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| 299 | * segment - pointer to segment address filled in |
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| 300 | * RTEMS_SUCCESSFUL - if successful |
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| 301 | * error code - if unsuccessful |
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| 302 | */ |
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| 303 | |
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| 304 | rtems_status_code rtems_region_get_segment( |
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| 305 | Objects_Id id, |
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| 306 | unsigned32 size, |
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[3a4ae6c] | 307 | rtems_option option_set, |
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| 308 | rtems_interval timeout, |
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[ac7d5ef0] | 309 | void **segment |
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| 310 | ) |
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| 311 | { |
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| 312 | register Region_Control *the_region; |
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| 313 | Objects_Locations location; |
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| 314 | Thread_Control *executing; |
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| 315 | void *the_segment; |
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| 316 | |
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[c4808ca] | 317 | *segment = NULL; |
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| 318 | |
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[ac7d5ef0] | 319 | if ( size == 0 ) |
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[3a4ae6c] | 320 | return RTEMS_INVALID_SIZE; |
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[ac7d5ef0] | 321 | |
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| 322 | executing = _Thread_Executing; |
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| 323 | the_region = _Region_Get( id, &location ); |
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| 324 | switch ( location ) { |
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| 325 | case OBJECTS_ERROR: |
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[3a4ae6c] | 326 | return RTEMS_INVALID_ID; |
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[ac7d5ef0] | 327 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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[3a4ae6c] | 328 | return RTEMS_INTERNAL_ERROR; |
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[ac7d5ef0] | 329 | case OBJECTS_LOCAL: |
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| 330 | if ( size > the_region->maximum_segment_size ) { |
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| 331 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 332 | return RTEMS_INVALID_SIZE; |
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[ac7d5ef0] | 333 | } |
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| 334 | |
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| 335 | _Region_Debug_Walk( the_region, 1 ); |
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| 336 | |
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| 337 | the_segment = _Region_Allocate_segment( the_region, size ); |
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| 338 | |
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| 339 | _Region_Debug_Walk( the_region, 2 ); |
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| 340 | |
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| 341 | if ( the_segment ) { |
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| 342 | the_region->number_of_used_blocks += 1; |
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| 343 | _Thread_Enable_dispatch(); |
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| 344 | *segment = the_segment; |
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[3a4ae6c] | 345 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 346 | } |
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| 347 | |
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| 348 | if ( _Options_Is_no_wait( option_set ) ) { |
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| 349 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 350 | return RTEMS_UNSATISFIED; |
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[ac7d5ef0] | 351 | } |
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| 352 | |
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[3a4ae6c] | 353 | executing->Wait.queue = &the_region->Wait_queue; |
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| 354 | executing->Wait.id = id; |
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| 355 | executing->Wait.count = size; |
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| 356 | executing->Wait.return_argument = (unsigned32 *) segment; |
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[ac7d5ef0] | 357 | |
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[67d224a] | 358 | _Thread_queue_Enter_critical_section( &the_region->Wait_queue ); |
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[ac7d5ef0] | 359 | |
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| 360 | _Thread_queue_Enqueue( &the_region->Wait_queue, timeout ); |
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| 361 | |
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| 362 | _Thread_Enable_dispatch(); |
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[ffe316d] | 363 | return (rtems_status_code) executing->Wait.return_code; |
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[ac7d5ef0] | 364 | } |
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| 365 | |
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[3a4ae6c] | 366 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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[ac7d5ef0] | 367 | } |
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| 368 | /*PAGE |
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| 369 | * |
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| 370 | * rtems_region_get_segment_size |
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| 371 | * |
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| 372 | * This directive will return the size of the segment indicated |
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| 373 | * |
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| 374 | * Input parameters: |
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| 375 | * id - region id |
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| 376 | * segment - segment address |
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| 377 | * size - pointer to segment size in bytes |
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| 378 | * |
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| 379 | * Output parameters: |
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| 380 | * size - segment size in bytes filled in |
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| 381 | * RTEMS_SUCCESSFUL - if successful |
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| 382 | * error code - if unsuccessful |
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| 383 | */ |
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| 384 | |
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| 385 | rtems_status_code rtems_region_get_segment_size( |
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| 386 | Objects_Id id, |
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| 387 | void *segment, |
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| 388 | unsigned32 *size |
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| 389 | ) |
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| 390 | { |
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| 391 | register Region_Control *the_region; |
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| 392 | Objects_Locations location; |
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| 393 | Thread_Control *executing; |
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| 394 | |
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| 395 | executing = _Thread_Executing; |
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| 396 | the_region = _Region_Get( id, &location ); |
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| 397 | switch ( location ) { |
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| 398 | case OBJECTS_ERROR: |
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[3a4ae6c] | 399 | return RTEMS_INVALID_ID; |
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[ac7d5ef0] | 400 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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[3a4ae6c] | 401 | return RTEMS_INTERNAL_ERROR; |
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[ac7d5ef0] | 402 | case OBJECTS_LOCAL: |
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| 403 | |
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| 404 | if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) { |
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| 405 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 406 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 407 | } |
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| 408 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 409 | return RTEMS_INVALID_ADDRESS; |
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[ac7d5ef0] | 410 | } |
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| 411 | |
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[3a4ae6c] | 412 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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[ac7d5ef0] | 413 | } |
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| 414 | |
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| 415 | /*PAGE |
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| 416 | * |
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| 417 | * rtems_region_return_segment |
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| 418 | * |
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| 419 | * This directive will return a segment to its region. |
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| 420 | * |
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| 421 | * Input parameters: |
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| 422 | * id - region id |
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| 423 | * segment - pointer to segment address |
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| 424 | * |
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| 425 | * Output parameters: |
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| 426 | * RTEMS_SUCCESSFUL - if successful |
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| 427 | * error code - if unsuccessful |
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| 428 | */ |
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| 429 | |
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| 430 | rtems_status_code rtems_region_return_segment( |
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| 431 | Objects_Id id, |
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| 432 | void *segment |
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| 433 | ) |
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| 434 | { |
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| 435 | register Region_Control *the_region; |
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| 436 | Thread_Control *the_thread; |
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| 437 | Objects_Locations location; |
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| 438 | void **the_segment; |
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| 439 | int status; |
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| 440 | |
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| 441 | the_region = _Region_Get( id, &location ); |
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| 442 | switch ( location ) { |
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| 443 | case OBJECTS_ERROR: |
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[3a4ae6c] | 444 | return RTEMS_INVALID_ID; |
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[ac7d5ef0] | 445 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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[3a4ae6c] | 446 | return RTEMS_INTERNAL_ERROR; |
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[ac7d5ef0] | 447 | case OBJECTS_LOCAL: |
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| 448 | |
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| 449 | _Region_Debug_Walk( the_region, 3 ); |
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| 450 | |
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| 451 | status = _Region_Free_segment( the_region, segment ); |
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| 452 | |
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| 453 | _Region_Debug_Walk( the_region, 4 ); |
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| 454 | |
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| 455 | if ( !status ) { |
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| 456 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 457 | return RTEMS_INVALID_ADDRESS; |
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[ac7d5ef0] | 458 | } |
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| 459 | |
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| 460 | the_region->number_of_used_blocks -= 1; |
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| 461 | for ( ; ; ) { |
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| 462 | the_thread = _Thread_queue_First( &the_region->Wait_queue ); |
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| 463 | |
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| 464 | if ( the_thread == NULL ) |
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| 465 | break; |
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| 466 | |
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[ffe316d] | 467 | the_segment = (void **) _Region_Allocate_segment( |
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[3a4ae6c] | 468 | the_region, |
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| 469 | the_thread->Wait.count |
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| 470 | ); |
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[ac7d5ef0] | 471 | |
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| 472 | if ( the_segment == NULL ) |
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| 473 | break; |
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| 474 | |
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| 475 | *(void **)the_thread->Wait.return_argument = the_segment; |
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| 476 | the_region->number_of_used_blocks += 1; |
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| 477 | _Thread_queue_Extract( &the_region->Wait_queue, the_thread ); |
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| 478 | the_thread->Wait.return_code = RTEMS_SUCCESSFUL; |
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| 479 | } |
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| 480 | |
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| 481 | _Thread_Enable_dispatch(); |
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[3a4ae6c] | 482 | return RTEMS_SUCCESSFUL; |
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[ac7d5ef0] | 483 | } |
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| 484 | |
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[3a4ae6c] | 485 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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[ac7d5ef0] | 486 | } |
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