1 | /* |
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2 | * Multiprocessing Support for the Region Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * All rights assigned to U.S. Government, 1994. |
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8 | * |
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9 | * This material may be reproduced by or for the U.S. Government pursuant |
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10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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11 | * notice must appear in all copies of this file and its derivatives. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/rtems/status.h> |
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18 | #include <rtems/score/mpci.h> |
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19 | #include <rtems/score/mppkt.h> |
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20 | #include <rtems/score/object.h> |
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21 | #include <rtems/rtems/options.h> |
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22 | #include <rtems/rtems/region.h> |
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23 | #include <rtems/score/thread.h> |
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24 | #include <rtems/rtems/support.h> |
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25 | |
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26 | /*PAGE |
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27 | * |
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28 | * _Region_MP_Send_process_packet |
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29 | * |
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30 | */ |
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31 | |
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32 | void _Region_MP_Send_process_packet ( |
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33 | Region_MP_Remote_operations operation, |
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34 | Objects_Id region_id, |
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35 | rtems_name name, |
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36 | Objects_Id proxy_id |
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37 | ) |
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38 | { |
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39 | Region_MP_Packet *the_packet; |
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40 | unsigned32 node; |
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41 | |
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42 | switch ( operation ) { |
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43 | |
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44 | case REGION_MP_ANNOUNCE_CREATE: |
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45 | case REGION_MP_ANNOUNCE_DELETE: |
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46 | case REGION_MP_EXTRACT_PROXY: |
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47 | |
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48 | the_packet = _Region_MP_Get_packet(); |
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49 | the_packet->Prefix.the_class = MP_PACKET_REGION; |
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50 | the_packet->Prefix.length = sizeof ( Region_MP_Packet ); |
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51 | the_packet->Prefix.to_convert = sizeof ( Region_MP_Packet ); |
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52 | the_packet->operation = operation; |
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53 | the_packet->Prefix.id = region_id; |
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54 | the_packet->name = name; |
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55 | the_packet->proxy_id = proxy_id; |
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56 | |
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57 | if ( operation == REGION_MP_EXTRACT_PROXY ) |
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58 | node = rtems_get_node( region_id ); |
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59 | else |
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60 | node = MPCI_ALL_NODES; |
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61 | |
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62 | _MPCI_Send_process_packet( node, &the_packet->Prefix ); |
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63 | break; |
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64 | |
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65 | case REGION_MP_GET_SEGMENT_REQUEST: |
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66 | case REGION_MP_GET_SEGMENT_RESPONSE: |
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67 | case REGION_MP_RETURN_SEGMENT_REQUEST: |
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68 | case REGION_MP_RETURN_SEGMENT_RESPONSE: |
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69 | break; |
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70 | } |
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71 | } |
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72 | |
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73 | /*PAGE |
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74 | * |
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75 | * _Region_MP_Send_request_packet |
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76 | * |
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77 | */ |
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78 | |
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79 | rtems_status_code _Region_MP_Send_request_packet ( |
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80 | Region_MP_Remote_operations operation, |
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81 | Objects_Id region_id, |
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82 | void *segment, |
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83 | unsigned32 size, |
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84 | rtems_option option_set, |
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85 | rtems_interval timeout |
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86 | ) |
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87 | { |
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88 | Region_MP_Packet *the_packet; |
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89 | |
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90 | switch ( operation ) { |
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91 | |
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92 | case REGION_MP_GET_SEGMENT_REQUEST: |
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93 | case REGION_MP_RETURN_SEGMENT_REQUEST: |
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94 | |
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95 | the_packet = _Region_MP_Get_packet(); |
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96 | the_packet->Prefix.the_class = MP_PACKET_REGION; |
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97 | the_packet->Prefix.length = sizeof ( Region_MP_Packet ); |
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98 | the_packet->Prefix.to_convert = sizeof ( Region_MP_Packet ); |
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99 | if ( ! _Options_Is_no_wait(option_set)) |
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100 | the_packet->Prefix.timeout = timeout; |
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101 | |
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102 | the_packet->operation = operation; |
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103 | the_packet->Prefix.id = region_id; |
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104 | the_packet->segment = segment; |
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105 | the_packet->size = size; |
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106 | the_packet->option_set = option_set; |
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107 | |
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108 | return _MPCI_Send_request_packet( |
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109 | rtems_get_node( region_id ), |
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110 | &the_packet->Prefix, |
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111 | STATES_READY /* Not used */ |
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112 | ); |
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113 | break; |
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114 | |
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115 | case REGION_MP_ANNOUNCE_CREATE: |
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116 | case REGION_MP_ANNOUNCE_DELETE: |
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117 | case REGION_MP_EXTRACT_PROXY: |
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118 | case REGION_MP_GET_SEGMENT_RESPONSE: |
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119 | case REGION_MP_RETURN_SEGMENT_RESPONSE: |
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120 | break; |
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121 | |
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122 | } |
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123 | /* |
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124 | * The following line is included to satisfy compilers which |
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125 | * produce warnings when a function does not end with a return. |
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126 | */ |
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127 | return RTEMS_INTERNAL_ERROR; |
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128 | } |
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129 | |
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130 | /*PAGE |
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131 | * |
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132 | * _Region_MP_Send_response_packet |
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133 | * |
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134 | */ |
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135 | |
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136 | void _Region_MP_Send_response_packet ( |
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137 | Region_MP_Remote_operations operation, |
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138 | Objects_Id region_id, |
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139 | Thread_Control *the_thread |
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140 | ) |
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141 | { |
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142 | Region_MP_Packet *the_packet; |
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143 | |
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144 | switch ( operation ) { |
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145 | |
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146 | case REGION_MP_GET_SEGMENT_RESPONSE: |
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147 | case REGION_MP_RETURN_SEGMENT_RESPONSE: |
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148 | |
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149 | the_packet = ( Region_MP_Packet *) the_thread->receive_packet; |
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150 | |
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151 | /* |
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152 | * The packet being returned already contains the class, length, and |
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153 | * to_convert fields, therefore they are not set in this routine. |
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154 | */ |
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155 | the_packet->operation = operation; |
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156 | the_packet->Prefix.id = the_packet->Prefix.source_tid; |
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157 | |
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158 | _MPCI_Send_response_packet( |
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159 | rtems_get_node( the_packet->Prefix.source_tid ), |
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160 | &the_packet->Prefix |
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161 | ); |
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162 | break; |
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163 | |
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164 | case REGION_MP_ANNOUNCE_CREATE: |
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165 | case REGION_MP_ANNOUNCE_DELETE: |
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166 | case REGION_MP_EXTRACT_PROXY: |
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167 | case REGION_MP_GET_SEGMENT_REQUEST: |
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168 | case REGION_MP_RETURN_SEGMENT_REQUEST: |
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169 | break; |
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170 | |
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171 | } |
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172 | } |
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173 | |
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174 | /*PAGE |
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175 | * |
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176 | * |
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177 | * _Region_MP_Process_packet |
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178 | * |
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179 | */ |
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180 | |
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181 | void _Region_MP_Process_packet ( |
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182 | rtems_packet_prefix *the_packet_prefix |
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183 | ) |
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184 | { |
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185 | Region_MP_Packet *the_packet; |
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186 | Thread_Control *the_thread; |
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187 | boolean ignored; |
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188 | |
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189 | the_packet = (Region_MP_Packet *) the_packet_prefix; |
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190 | |
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191 | switch ( the_packet->operation ) { |
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192 | |
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193 | case REGION_MP_ANNOUNCE_CREATE: |
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194 | |
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195 | ignored = _Objects_MP_Allocate_and_open( |
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196 | &_Region_Information, |
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197 | the_packet->name, |
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198 | the_packet->Prefix.id, |
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199 | TRUE |
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200 | ); |
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201 | |
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202 | _MPCI_Return_packet( the_packet_prefix ); |
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203 | break; |
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204 | |
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205 | case REGION_MP_ANNOUNCE_DELETE: |
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206 | |
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207 | _Objects_MP_Close( &_Region_Information, the_packet->Prefix.id ); |
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208 | |
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209 | _MPCI_Return_packet( the_packet_prefix ); |
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210 | break; |
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211 | |
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212 | case REGION_MP_EXTRACT_PROXY: |
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213 | |
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214 | the_thread = _Thread_MP_Find_proxy( the_packet->proxy_id ); |
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215 | |
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216 | if ( ! _Thread_Is_null( the_thread ) ) |
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217 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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218 | |
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219 | _MPCI_Return_packet( the_packet_prefix ); |
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220 | break; |
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221 | |
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222 | case REGION_MP_GET_SEGMENT_REQUEST: |
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223 | |
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224 | the_packet->Prefix.return_code = rtems_region_get_segment( |
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225 | the_packet->Prefix.id, |
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226 | the_packet->size, |
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227 | the_packet->option_set, |
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228 | the_packet->Prefix.timeout, |
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229 | &the_packet->segment |
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230 | ); |
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231 | |
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232 | _Region_MP_Send_response_packet( |
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233 | REGION_MP_GET_SEGMENT_RESPONSE, |
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234 | the_packet->Prefix.id, |
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235 | _Thread_Executing |
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236 | ); |
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237 | break; |
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238 | |
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239 | case REGION_MP_GET_SEGMENT_RESPONSE: |
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240 | |
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241 | the_thread = _MPCI_Process_response( the_packet_prefix ); |
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242 | |
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243 | *(void **)the_thread->Wait.return_argument = the_packet->segment; |
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244 | |
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245 | _MPCI_Return_packet( the_packet_prefix ); |
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246 | break; |
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247 | |
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248 | case REGION_MP_RETURN_SEGMENT_REQUEST: |
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249 | |
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250 | the_packet->Prefix.return_code = rtems_region_return_segment( |
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251 | the_packet->Prefix.id, |
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252 | the_packet->segment |
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253 | ); |
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254 | |
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255 | _Region_MP_Send_response_packet( |
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256 | REGION_MP_RETURN_SEGMENT_RESPONSE, |
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257 | the_packet->Prefix.id, |
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258 | _Thread_Executing |
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259 | ); |
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260 | break; |
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261 | |
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262 | case REGION_MP_RETURN_SEGMENT_RESPONSE: |
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263 | |
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264 | the_thread = _MPCI_Process_response( the_packet_prefix ); |
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265 | |
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266 | _MPCI_Return_packet( the_packet_prefix ); |
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267 | break; |
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268 | |
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269 | } |
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270 | } |
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271 | |
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272 | /*PAGE |
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273 | * |
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274 | * _Region_MP_Send_object_was_deleted |
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275 | * |
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276 | * This routine is not needed by the Region since a region |
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277 | * cannot be deleted when segments are in use. |
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278 | * |
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279 | */ |
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280 | |
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281 | /*PAGE |
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282 | * |
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283 | * _Region_MP_Send_extract_proxy |
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284 | * |
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285 | */ |
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286 | |
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287 | void _Region_MP_Send_extract_proxy ( |
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288 | Thread_Control *the_thread |
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289 | ) |
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290 | { |
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291 | _Region_MP_Send_process_packet( |
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292 | REGION_MP_EXTRACT_PROXY, |
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293 | the_thread->Wait.id, |
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294 | (rtems_name) 0, |
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295 | the_thread->Object.id |
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296 | ); |
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297 | } |
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298 | |
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299 | /*PAGE |
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300 | * |
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301 | * _Region_MP_Get_packet |
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302 | * |
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303 | */ |
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304 | |
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305 | Region_MP_Packet *_Region_MP_Get_packet ( void ) |
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306 | { |
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307 | return ( (Region_MP_Packet *) _MPCI_Get_packet() ); |
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308 | } |
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309 | |
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310 | /* end of file */ |
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