1 | /* |
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2 | * Multiprocessing Support for the Semaphore 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/mpci.h> |
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18 | #include <rtems/mppkt.h> |
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19 | #include <rtems/object.h> |
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20 | #include <rtems/options.h> |
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21 | #include <rtems/sem.h> |
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22 | #include <rtems/thread.h> |
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23 | #include <rtems/watchdog.h> |
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24 | |
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25 | /*PAGE |
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26 | * |
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27 | * _Semaphore_MP_Send_process_packet |
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28 | * |
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29 | */ |
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30 | |
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31 | void _Semaphore_MP_Send_process_packet ( |
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32 | Semaphore_MP_Remote_operations operation, |
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33 | Objects_Id semaphore_id, |
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34 | rtems_name name, |
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35 | Objects_Id proxy_id |
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36 | ) |
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37 | { |
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38 | Semaphore_MP_Packet *the_packet; |
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39 | unsigned32 node; |
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40 | |
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41 | switch ( operation ) { |
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42 | |
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43 | case SEMAPHORE_MP_ANNOUNCE_CREATE: |
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44 | case SEMAPHORE_MP_ANNOUNCE_DELETE: |
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45 | case SEMAPHORE_MP_EXTRACT_PROXY: |
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46 | |
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47 | the_packet = _Semaphore_MP_Get_packet(); |
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48 | the_packet->Prefix.the_class = RTEMS_MP_PACKET_SEMAPHORE; |
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49 | the_packet->Prefix.length = sizeof ( Semaphore_MP_Packet ); |
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50 | the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet ); |
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51 | the_packet->operation = operation; |
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52 | the_packet->Prefix.id = semaphore_id; |
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53 | the_packet->name = name; |
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54 | the_packet->proxy_id = proxy_id; |
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55 | |
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56 | if ( operation == SEMAPHORE_MP_EXTRACT_PROXY ) |
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57 | node = rtems_get_node( semaphore_id ); |
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58 | else |
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59 | node = MPCI_ALL_NODES; |
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60 | |
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61 | _MPCI_Send_process_packet( node, &the_packet->Prefix ); |
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62 | break; |
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63 | |
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64 | case SEMAPHORE_MP_OBTAIN_REQUEST: |
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65 | case SEMAPHORE_MP_OBTAIN_RESPONSE: |
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66 | case SEMAPHORE_MP_RELEASE_REQUEST: |
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67 | case SEMAPHORE_MP_RELEASE_RESPONSE: |
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68 | break; |
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69 | } |
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70 | } |
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71 | |
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72 | /*PAGE |
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73 | * |
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74 | * _Semaphore_MP_Send_request_packet |
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75 | * |
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76 | */ |
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77 | |
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78 | rtems_status_code _Semaphore_MP_Send_request_packet ( |
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79 | Semaphore_MP_Remote_operations operation, |
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80 | Objects_Id semaphore_id, |
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81 | rtems_option option_set, |
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82 | rtems_interval timeout |
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83 | ) |
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84 | { |
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85 | Semaphore_MP_Packet *the_packet; |
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86 | |
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87 | switch ( operation ) { |
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88 | |
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89 | case SEMAPHORE_MP_OBTAIN_REQUEST: |
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90 | case SEMAPHORE_MP_RELEASE_REQUEST: |
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91 | |
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92 | the_packet = _Semaphore_MP_Get_packet(); |
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93 | the_packet->Prefix.the_class = RTEMS_MP_PACKET_SEMAPHORE; |
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94 | the_packet->Prefix.length = sizeof ( Semaphore_MP_Packet ); |
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95 | the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet ); |
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96 | if ( ! _Options_Is_no_wait(option_set)) |
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97 | the_packet->Prefix.timeout = timeout; |
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98 | |
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99 | the_packet->operation = operation; |
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100 | the_packet->Prefix.id = semaphore_id; |
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101 | the_packet->option_set = option_set; |
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102 | |
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103 | return _MPCI_Send_request_packet( |
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104 | rtems_get_node( semaphore_id ), |
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105 | &the_packet->Prefix, |
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106 | STATES_WAITING_FOR_SEMAPHORE |
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107 | ); |
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108 | break; |
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109 | |
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110 | case SEMAPHORE_MP_ANNOUNCE_CREATE: |
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111 | case SEMAPHORE_MP_ANNOUNCE_DELETE: |
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112 | case SEMAPHORE_MP_EXTRACT_PROXY: |
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113 | case SEMAPHORE_MP_OBTAIN_RESPONSE: |
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114 | case SEMAPHORE_MP_RELEASE_RESPONSE: |
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115 | break; |
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116 | |
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117 | } |
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118 | /* |
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119 | * The following line is included to satisfy compilers which |
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120 | * produce warnings when a function does not end with a return. |
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121 | */ |
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122 | return RTEMS_SUCCESSFUL; |
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123 | } |
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124 | |
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125 | /*PAGE |
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126 | * |
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127 | * _Semaphore_MP_Send_response_packet |
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128 | * |
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129 | */ |
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130 | |
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131 | void _Semaphore_MP_Send_response_packet ( |
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132 | Semaphore_MP_Remote_operations operation, |
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133 | Objects_Id semaphore_id, |
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134 | Thread_Control *the_thread |
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135 | ) |
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136 | { |
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137 | Semaphore_MP_Packet *the_packet; |
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138 | |
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139 | switch ( operation ) { |
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140 | |
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141 | case SEMAPHORE_MP_OBTAIN_RESPONSE: |
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142 | case SEMAPHORE_MP_RELEASE_RESPONSE: |
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143 | |
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144 | the_packet = ( Semaphore_MP_Packet *) the_thread->receive_packet; |
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145 | |
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146 | /* |
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147 | * The packet being returned already contains the class, length, and |
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148 | * to_convert fields, therefore they are not set in this routine. |
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149 | */ |
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150 | the_packet->operation = operation; |
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151 | the_packet->Prefix.id = the_packet->Prefix.source_tid; |
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152 | |
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153 | _MPCI_Send_response_packet( |
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154 | rtems_get_node( the_packet->Prefix.source_tid ), |
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155 | &the_packet->Prefix |
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156 | ); |
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157 | break; |
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158 | |
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159 | case SEMAPHORE_MP_ANNOUNCE_CREATE: |
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160 | case SEMAPHORE_MP_ANNOUNCE_DELETE: |
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161 | case SEMAPHORE_MP_EXTRACT_PROXY: |
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162 | case SEMAPHORE_MP_OBTAIN_REQUEST: |
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163 | case SEMAPHORE_MP_RELEASE_REQUEST: |
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164 | break; |
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165 | |
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166 | } |
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167 | } |
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168 | |
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169 | /*PAGE |
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170 | * |
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171 | * |
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172 | * _Semaphore_MP_Process_packet |
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173 | * |
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174 | */ |
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175 | |
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176 | void _Semaphore_MP_Process_packet ( |
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177 | rtems_packet_prefix *the_packet_prefix |
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178 | ) |
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179 | { |
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180 | Semaphore_MP_Packet *the_packet; |
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181 | Thread_Control *the_thread; |
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182 | boolean ignored; |
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183 | |
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184 | the_packet = (Semaphore_MP_Packet *) the_packet_prefix; |
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185 | |
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186 | switch ( the_packet->operation ) { |
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187 | |
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188 | case SEMAPHORE_MP_ANNOUNCE_CREATE: |
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189 | |
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190 | ignored = _Objects_MP_Allocate_and_open( |
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191 | &_Semaphore_Information, |
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192 | the_packet->name, |
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193 | the_packet->Prefix.id, |
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194 | TRUE |
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195 | ); |
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196 | |
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197 | _MPCI_Return_packet( the_packet_prefix ); |
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198 | break; |
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199 | |
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200 | case SEMAPHORE_MP_ANNOUNCE_DELETE: |
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201 | |
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202 | _Objects_MP_Close( &_Semaphore_Information, the_packet->Prefix.id ); |
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203 | |
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204 | _MPCI_Return_packet( the_packet_prefix ); |
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205 | break; |
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206 | |
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207 | case SEMAPHORE_MP_EXTRACT_PROXY: |
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208 | |
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209 | the_thread = _Thread_MP_Find_proxy( the_packet->proxy_id ); |
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210 | |
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211 | if ( ! _Thread_Is_null( the_thread ) ) |
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212 | _Thread_queue_Extract( the_thread->Wait.queue, the_thread ); |
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213 | |
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214 | _MPCI_Return_packet( the_packet_prefix ); |
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215 | break; |
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216 | |
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217 | case SEMAPHORE_MP_OBTAIN_REQUEST: |
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218 | |
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219 | the_packet->Prefix.return_code = rtems_semaphore_obtain( |
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220 | the_packet->Prefix.id, |
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221 | the_packet->option_set, |
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222 | the_packet->Prefix.timeout |
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223 | ); |
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224 | |
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225 | if ( ! _Status_Is_proxy_blocking( the_packet->Prefix.return_code ) ) |
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226 | _Semaphore_MP_Send_response_packet( |
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227 | SEMAPHORE_MP_OBTAIN_RESPONSE, |
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228 | the_packet->Prefix.id, |
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229 | _Thread_Executing |
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230 | ); |
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231 | break; |
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232 | |
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233 | case SEMAPHORE_MP_OBTAIN_RESPONSE: |
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234 | case SEMAPHORE_MP_RELEASE_RESPONSE: |
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235 | |
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236 | the_thread = _MPCI_Process_response( the_packet_prefix ); |
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237 | |
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238 | _MPCI_Return_packet( the_packet_prefix ); |
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239 | break; |
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240 | |
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241 | case SEMAPHORE_MP_RELEASE_REQUEST: |
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242 | |
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243 | the_packet->Prefix.return_code = rtems_semaphore_release( |
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244 | the_packet->Prefix.id |
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245 | ); |
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246 | |
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247 | _Semaphore_MP_Send_response_packet( |
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248 | SEMAPHORE_MP_RELEASE_RESPONSE, |
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249 | the_packet->Prefix.id, |
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250 | _Thread_Executing |
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251 | ); |
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252 | break; |
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253 | } |
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254 | } |
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255 | |
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256 | /*PAGE |
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257 | * |
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258 | * _Semaphore_MP_Send_object_was_deleted |
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259 | * |
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260 | */ |
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261 | |
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262 | void _Semaphore_MP_Send_object_was_deleted ( |
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263 | Thread_Control *the_proxy |
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264 | ) |
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265 | { |
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266 | the_proxy->receive_packet->return_code = RTEMS_OBJECT_WAS_DELETED; |
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267 | |
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268 | _Semaphore_MP_Send_response_packet( |
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269 | SEMAPHORE_MP_OBTAIN_RESPONSE, |
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270 | the_proxy->Wait.id, |
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271 | the_proxy |
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272 | ); |
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273 | |
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274 | } |
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275 | |
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276 | /*PAGE |
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277 | * |
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278 | * _Semaphore_MP_Send_extract_proxy |
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279 | * |
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280 | */ |
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281 | |
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282 | void _Semaphore_MP_Send_extract_proxy ( |
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283 | Thread_Control *the_thread |
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284 | ) |
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285 | { |
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286 | _Semaphore_MP_Send_process_packet( |
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287 | SEMAPHORE_MP_EXTRACT_PROXY, |
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288 | the_thread->Wait.id, |
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289 | (rtems_name) 0, |
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290 | the_thread->Object.id |
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291 | ); |
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292 | |
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293 | } |
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294 | |
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295 | /*PAGE |
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296 | * |
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297 | * _Semaphore_MP_Get_packet |
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298 | * |
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299 | */ |
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300 | |
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301 | Semaphore_MP_Packet *_Semaphore_MP_Get_packet ( void ) |
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302 | { |
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303 | return ( (Semaphore_MP_Packet *) _MPCI_Get_packet() ); |
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304 | } |
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305 | |
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306 | /* end of file */ |
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