1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Tasks MP Send Process Packet |
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5 | * @ingroup ClassicTaskMP Task MP Support |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2008. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/rtems/tasksimpl.h> |
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22 | #include <rtems/rtems/optionsimpl.h> |
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23 | #include <rtems/score/statesimpl.h> |
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24 | #include <rtems/score/threadimpl.h> |
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25 | #include <rtems/score/threadqimpl.h> |
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26 | |
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27 | /** |
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28 | * The following data structure defines the packet used to perform |
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29 | * remote task operations. |
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30 | */ |
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31 | typedef struct { |
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32 | rtems_packet_prefix Prefix; |
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33 | RTEMS_tasks_MP_Remote_operations operation; |
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34 | rtems_name name; |
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35 | rtems_task_priority the_priority; |
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36 | } RTEMS_tasks_MP_Packet; |
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37 | |
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38 | RTEMS_STATIC_ASSERT( |
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39 | sizeof(RTEMS_tasks_MP_Packet) <= MP_PACKET_MINIMUM_PACKET_SIZE, |
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40 | RTEMS_tasks_MP_Packet |
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41 | ); |
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42 | |
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43 | static RTEMS_tasks_MP_Packet *_RTEMS_tasks_MP_Get_packet( void ) |
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44 | { |
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45 | return (RTEMS_tasks_MP_Packet *) _MPCI_Get_packet(); |
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46 | } |
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47 | |
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48 | static RTEMS_tasks_MP_Packet *_RTEMS_tasks_MP_Get_request_packet( |
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49 | Objects_Id id |
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50 | ) |
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51 | { |
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52 | if ( !_Thread_MP_Is_remote( id ) ) { |
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53 | return NULL; |
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54 | } |
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55 | |
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56 | return _RTEMS_tasks_MP_Get_packet(); |
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57 | } |
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58 | |
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59 | /* |
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60 | * _RTEMS_tasks_MP_Send_process_packet |
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61 | * |
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62 | */ |
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63 | |
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64 | void _RTEMS_tasks_MP_Send_process_packet ( |
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65 | RTEMS_tasks_MP_Remote_operations operation, |
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66 | Objects_Id task_id, |
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67 | rtems_name name |
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68 | ) |
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69 | { |
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70 | RTEMS_tasks_MP_Packet *the_packet; |
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71 | |
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72 | switch ( operation ) { |
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73 | |
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74 | case RTEMS_TASKS_MP_ANNOUNCE_CREATE: |
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75 | case RTEMS_TASKS_MP_ANNOUNCE_DELETE: |
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76 | |
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77 | the_packet = _RTEMS_tasks_MP_Get_packet(); |
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78 | the_packet->Prefix.the_class = MP_PACKET_TASKS; |
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79 | the_packet->Prefix.length = sizeof ( RTEMS_tasks_MP_Packet ); |
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80 | the_packet->Prefix.to_convert = sizeof ( RTEMS_tasks_MP_Packet ); |
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81 | the_packet->operation = operation; |
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82 | the_packet->Prefix.id = task_id; |
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83 | the_packet->name = name; |
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84 | |
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85 | _MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix ); |
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86 | break; |
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87 | |
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88 | case RTEMS_TASKS_MP_SUSPEND_REQUEST: |
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89 | case RTEMS_TASKS_MP_SUSPEND_RESPONSE: |
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90 | case RTEMS_TASKS_MP_RESUME_REQUEST: |
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91 | case RTEMS_TASKS_MP_RESUME_RESPONSE: |
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92 | case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST: |
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93 | case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE: |
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94 | break; |
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95 | } |
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96 | } |
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97 | |
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98 | static rtems_status_code _RTEMS_tasks_MP_Send_request_packet( |
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99 | RTEMS_tasks_MP_Packet *the_packet, |
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100 | Objects_Id id, |
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101 | RTEMS_tasks_MP_Remote_operations operation |
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102 | ) |
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103 | { |
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104 | the_packet->Prefix.the_class = MP_PACKET_TASKS; |
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105 | the_packet->Prefix.length = sizeof( *the_packet ); |
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106 | the_packet->Prefix.to_convert = sizeof( *the_packet ); |
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107 | the_packet->Prefix.id = id; |
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108 | the_packet->operation = operation; |
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109 | |
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110 | return _MPCI_Send_request_packet( |
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111 | _Objects_Get_node( id ), |
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112 | &the_packet->Prefix, |
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113 | STATES_READY, /* Not used */ |
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114 | RTEMS_TIMEOUT |
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115 | ); |
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116 | } |
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117 | |
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118 | rtems_status_code _RTEMS_tasks_MP_Set_priority( |
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119 | rtems_id id, |
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120 | rtems_task_priority new_priority, |
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121 | rtems_task_priority *old_priority |
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122 | ) |
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123 | { |
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124 | RTEMS_tasks_MP_Packet *the_packet; |
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125 | |
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126 | the_packet = _RTEMS_tasks_MP_Get_request_packet( id ); |
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127 | if ( the_packet == NULL ) { |
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128 | return RTEMS_INVALID_ID; |
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129 | } |
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130 | |
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131 | the_packet->the_priority = new_priority; |
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132 | _Thread_Executing->Wait.return_argument = old_priority; |
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133 | return _RTEMS_tasks_MP_Send_request_packet( |
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134 | the_packet, |
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135 | id, |
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136 | RTEMS_TASKS_MP_SET_PRIORITY_REQUEST |
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137 | ); |
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138 | } |
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139 | |
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140 | rtems_status_code _RTEMS_tasks_MP_Suspend( rtems_id id ) |
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141 | { |
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142 | RTEMS_tasks_MP_Packet *the_packet; |
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143 | |
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144 | the_packet = _RTEMS_tasks_MP_Get_request_packet( id ); |
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145 | if ( the_packet == NULL ) { |
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146 | return RTEMS_INVALID_ID; |
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147 | } |
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148 | |
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149 | return _RTEMS_tasks_MP_Send_request_packet( |
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150 | the_packet, |
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151 | id, |
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152 | RTEMS_TASKS_MP_SUSPEND_REQUEST |
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153 | ); |
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154 | } |
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155 | |
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156 | rtems_status_code _RTEMS_tasks_MP_Resume( rtems_id id ) |
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157 | { |
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158 | RTEMS_tasks_MP_Packet *the_packet; |
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159 | |
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160 | the_packet = _RTEMS_tasks_MP_Get_request_packet( id ); |
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161 | if ( the_packet == NULL ) { |
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162 | return RTEMS_INVALID_ID; |
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163 | } |
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164 | |
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165 | return _RTEMS_tasks_MP_Send_request_packet( |
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166 | the_packet, |
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167 | id, |
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168 | RTEMS_TASKS_MP_RESUME_REQUEST |
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169 | ); |
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170 | } |
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171 | |
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172 | /* |
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173 | * _RTEMS_tasks_MP_Send_response_packet |
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174 | * |
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175 | */ |
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176 | |
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177 | static void _RTEMS_tasks_MP_Send_response_packet ( |
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178 | RTEMS_tasks_MP_Remote_operations operation, |
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179 | Thread_Control *the_thread |
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180 | ) |
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181 | { |
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182 | RTEMS_tasks_MP_Packet *the_packet; |
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183 | |
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184 | switch ( operation ) { |
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185 | |
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186 | case RTEMS_TASKS_MP_SUSPEND_RESPONSE: |
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187 | case RTEMS_TASKS_MP_RESUME_RESPONSE: |
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188 | case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE: |
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189 | |
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190 | the_packet = (RTEMS_tasks_MP_Packet *) the_thread->receive_packet; |
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191 | |
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192 | /* |
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193 | * The packet being returned already contains the class, length, and |
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194 | * to_convert fields, therefore they are not set in this routine. |
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195 | */ |
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196 | the_packet->operation = operation; |
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197 | the_packet->Prefix.id = the_packet->Prefix.source_tid; |
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198 | |
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199 | _MPCI_Send_response_packet( |
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200 | _Objects_Get_node( the_packet->Prefix.source_tid ), |
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201 | &the_packet->Prefix |
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202 | ); |
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203 | break; |
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204 | |
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205 | case RTEMS_TASKS_MP_ANNOUNCE_CREATE: |
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206 | case RTEMS_TASKS_MP_ANNOUNCE_DELETE: |
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207 | case RTEMS_TASKS_MP_SUSPEND_REQUEST: |
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208 | case RTEMS_TASKS_MP_RESUME_REQUEST: |
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209 | case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST: |
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210 | break; |
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211 | |
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212 | } |
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213 | } |
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214 | |
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215 | /* |
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216 | * |
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217 | * _RTEMS_tasks_MP_Process_packet |
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218 | * |
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219 | */ |
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220 | |
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221 | void _RTEMS_tasks_MP_Process_packet ( |
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222 | rtems_packet_prefix *the_packet_prefix |
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223 | ) |
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224 | { |
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225 | RTEMS_tasks_MP_Packet *the_packet; |
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226 | Thread_Control *the_thread; |
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227 | |
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228 | the_packet = (RTEMS_tasks_MP_Packet *) the_packet_prefix; |
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229 | |
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230 | switch ( the_packet->operation ) { |
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231 | |
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232 | case RTEMS_TASKS_MP_ANNOUNCE_CREATE: |
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233 | |
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234 | _Objects_MP_Allocate_and_open( |
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235 | &_RTEMS_tasks_Information.Objects, |
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236 | the_packet->name, |
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237 | the_packet->Prefix.id, |
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238 | true |
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239 | ); |
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240 | |
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241 | _MPCI_Return_packet( the_packet_prefix ); |
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242 | break; |
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243 | |
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244 | case RTEMS_TASKS_MP_ANNOUNCE_DELETE: |
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245 | |
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246 | _Objects_MP_Close( |
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247 | &_RTEMS_tasks_Information.Objects, |
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248 | the_packet->Prefix.id |
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249 | ); |
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250 | |
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251 | _MPCI_Return_packet( the_packet_prefix ); |
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252 | break; |
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253 | |
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254 | case RTEMS_TASKS_MP_SUSPEND_REQUEST: |
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255 | |
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256 | the_packet->Prefix.return_code = rtems_task_suspend( |
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257 | the_packet->Prefix.id |
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258 | ); |
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259 | |
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260 | _RTEMS_tasks_MP_Send_response_packet( |
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261 | RTEMS_TASKS_MP_SUSPEND_RESPONSE, |
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262 | _Thread_Executing |
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263 | ); |
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264 | break; |
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265 | |
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266 | case RTEMS_TASKS_MP_SUSPEND_RESPONSE: |
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267 | case RTEMS_TASKS_MP_RESUME_RESPONSE: |
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268 | |
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269 | the_thread = _MPCI_Process_response( the_packet_prefix ); |
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270 | |
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271 | _MPCI_Return_packet( the_packet_prefix ); |
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272 | break; |
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273 | |
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274 | case RTEMS_TASKS_MP_RESUME_REQUEST: |
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275 | |
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276 | the_packet->Prefix.return_code = rtems_task_resume( |
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277 | the_packet->Prefix.id |
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278 | ); |
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279 | |
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280 | _RTEMS_tasks_MP_Send_response_packet( |
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281 | RTEMS_TASKS_MP_RESUME_RESPONSE, |
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282 | _Thread_Executing |
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283 | ); |
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284 | break; |
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285 | |
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286 | case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST: |
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287 | |
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288 | the_packet->Prefix.return_code = rtems_task_set_priority( |
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289 | the_packet->Prefix.id, |
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290 | the_packet->the_priority, |
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291 | &the_packet->the_priority |
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292 | ); |
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293 | |
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294 | _RTEMS_tasks_MP_Send_response_packet( |
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295 | RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE, |
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296 | _Thread_Executing |
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297 | ); |
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298 | break; |
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299 | |
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300 | case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE: |
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301 | |
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302 | the_thread = _MPCI_Process_response( the_packet_prefix ); |
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303 | |
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304 | *(rtems_task_priority *)the_thread->Wait.return_argument = |
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305 | the_packet->the_priority; |
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306 | |
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307 | _MPCI_Return_packet( the_packet_prefix ); |
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308 | break; |
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309 | } |
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310 | } |
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311 | |
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312 | /* |
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313 | * _RTEMS_tasks_MP_Send_object_was_deleted |
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314 | * |
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315 | * This routine is not neededby the Tasks since a task |
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316 | * cannot be globally deleted. |
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317 | * |
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318 | */ |
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319 | |
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320 | /* |
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321 | * _RTEMS_tasks_MP_Send_extract_proxy |
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322 | * |
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323 | * This routine is not neededby the Tasks since a task |
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324 | * cannot be globally deleted. |
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325 | * |
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326 | */ |
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327 | |
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328 | /* end of file */ |
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