1 | /* |
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2 | * Message Queue 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/attr.h> |
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18 | #include <rtems/chain.h> |
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19 | #include <rtems/config.h> |
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20 | #include <rtems/isr.h> |
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21 | #include <rtems/message.h> |
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22 | #include <rtems/object.h> |
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23 | #include <rtems/options.h> |
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24 | #include <rtems/states.h> |
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25 | #include <rtems/thread.h> |
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26 | #include <rtems/wkspace.h> |
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27 | #include <rtems/mpci.h> |
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28 | |
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29 | /*PAGE |
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30 | * |
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31 | * _Message_queue_Manager_initialization |
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32 | * |
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33 | * This routine initializes all message queue manager related |
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34 | * data structures. |
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35 | * |
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36 | * Input parameters: |
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37 | * maximum_message_queues - number of message queues to initialize |
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38 | * maximum_message - number of messages per queue |
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39 | * |
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40 | * Output parameters: NONE |
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41 | */ |
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42 | |
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43 | void _Message_queue_Manager_initialization( |
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44 | unsigned32 maximum_message_queues, |
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45 | unsigned32 maximum_messages |
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46 | ) |
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47 | { |
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48 | |
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49 | _Objects_Initialize_information( |
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50 | &_Message_queue_Information, |
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51 | TRUE, |
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52 | maximum_message_queues, |
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53 | sizeof( Message_queue_Control ) |
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54 | ); |
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55 | |
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56 | if ( maximum_messages == 0 ) { |
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57 | |
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58 | _Chain_Initialize_empty( &_Message_queue_Inactive_messages ); |
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59 | |
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60 | } else { |
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61 | |
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62 | |
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63 | _Chain_Initialize( |
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64 | &_Message_queue_Inactive_messages, |
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65 | _Workspace_Allocate_or_fatal_error( |
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66 | maximum_messages * sizeof( Message_queue_Buffer_control ) |
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67 | ), |
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68 | maximum_messages, |
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69 | sizeof( Message_queue_Buffer_control ) |
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70 | ); |
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71 | |
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72 | } |
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73 | } |
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74 | |
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75 | /*PAGE |
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76 | * |
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77 | * rtems_message_queue_create |
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78 | * |
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79 | * This directive creates a message queue by allocating and initializing |
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80 | * a message queue data structure. |
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81 | * |
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82 | * Input parameters: |
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83 | * name - user defined queue name |
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84 | * count - maximum message and reserved buffer count |
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85 | * attribute_set - process method |
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86 | * id - pointer to queue |
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87 | * |
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88 | * Output parameters: |
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89 | * id - queue id |
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90 | * RTEMS_SUCCESSFUL - if successful |
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91 | * error code - if unsuccessful |
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92 | */ |
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93 | |
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94 | rtems_status_code rtems_message_queue_create( |
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95 | Objects_Name name, |
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96 | unsigned32 count, |
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97 | rtems_attribute attribute_set, |
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98 | Objects_Id *id |
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99 | ) |
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100 | { |
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101 | register Message_queue_Control *the_message_queue; |
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102 | |
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103 | if ( !_Objects_Is_name_valid( name ) ) |
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104 | return ( RTEMS_INVALID_NAME ); |
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105 | |
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106 | if ( _Attributes_Is_global( attribute_set ) && |
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107 | !_Configuration_Is_multiprocessing() ) |
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108 | return( RTEMS_MP_NOT_CONFIGURED ); |
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109 | |
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110 | _Thread_Disable_dispatch(); /* protects object pointer */ |
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111 | |
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112 | the_message_queue = _Message_queue_Allocate(); |
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113 | |
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114 | if ( !the_message_queue ) { |
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115 | _Thread_Enable_dispatch(); |
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116 | return( RTEMS_TOO_MANY ); |
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117 | } |
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118 | |
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119 | if ( _Attributes_Is_global( attribute_set ) && |
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120 | !( _Objects_MP_Open( &_Message_queue_Information, name, |
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121 | the_message_queue->Object.id, FALSE ) ) ) { |
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122 | _Message_queue_Free( the_message_queue ); |
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123 | _Thread_Enable_dispatch(); |
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124 | return( RTEMS_TOO_MANY ); |
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125 | } |
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126 | |
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127 | if ( _Attributes_Is_limit( attribute_set ) ) |
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128 | the_message_queue->maximum_pending_messages = count; |
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129 | else |
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130 | the_message_queue->maximum_pending_messages = 0xffffffff; |
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131 | |
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132 | the_message_queue->attribute_set = attribute_set; |
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133 | the_message_queue->number_of_pending_messages = 0; |
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134 | |
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135 | _Chain_Initialize_empty( &the_message_queue->Pending_messages ); |
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136 | |
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137 | _Thread_queue_Initialize( &the_message_queue->Wait_queue, attribute_set, |
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138 | STATES_WAITING_FOR_MESSAGE ); |
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139 | |
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140 | _Objects_Open( &_Message_queue_Information, |
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141 | &the_message_queue->Object, name ); |
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142 | |
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143 | *id = the_message_queue->Object.id; |
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144 | |
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145 | if ( _Attributes_Is_global( attribute_set ) ) |
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146 | _Message_queue_MP_Send_process_packet( |
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147 | MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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148 | the_message_queue->Object.id, |
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149 | name, |
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150 | 0 |
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151 | ); |
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152 | |
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153 | _Thread_Enable_dispatch(); |
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154 | return( RTEMS_SUCCESSFUL ); |
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155 | } |
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156 | |
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157 | /*PAGE |
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158 | * |
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159 | * rtems_message_queue_ident |
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160 | * |
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161 | * This directive returns the system ID associated with |
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162 | * the message queue name. |
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163 | * |
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164 | * Input parameters: |
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165 | * name - user defined message queue name |
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166 | * node - node(s) to be searched |
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167 | * id - pointer to message queue id |
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168 | * |
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169 | * Output parameters: |
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170 | * *id - message queue id |
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171 | * RTEMS_SUCCESSFUL - if successful |
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172 | * error code - if unsuccessful |
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173 | */ |
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174 | |
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175 | rtems_status_code rtems_message_queue_ident( |
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176 | Objects_Name name, |
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177 | unsigned32 node, |
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178 | Objects_Id *id |
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179 | ) |
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180 | { |
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181 | return( _Objects_Name_to_id( &_Message_queue_Information, name, |
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182 | node, id ) ); |
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183 | } |
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184 | |
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185 | /*PAGE |
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186 | * |
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187 | * rtems_message_queue_delete |
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188 | * |
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189 | * This directive allows a thread to delete the message queue specified |
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190 | * by the given queue identifier. |
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191 | * |
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192 | * Input parameters: |
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193 | * id - queue id |
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194 | * |
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195 | * Output parameters: |
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196 | * RTEMS_SUCCESSFUL - if successful |
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197 | * error code - if unsuccessful |
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198 | */ |
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199 | |
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200 | rtems_status_code rtems_message_queue_delete( |
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201 | Objects_Id id |
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202 | ) |
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203 | { |
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204 | register Message_queue_Control *the_message_queue; |
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205 | Objects_Locations location; |
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206 | |
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207 | the_message_queue = _Message_queue_Get( id, &location ); |
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208 | switch ( location ) { |
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209 | case OBJECTS_ERROR: |
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210 | return( RTEMS_INVALID_ID ); |
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211 | case OBJECTS_REMOTE: |
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212 | _Thread_Dispatch(); |
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213 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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214 | case OBJECTS_LOCAL: |
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215 | _Objects_Close( &_Message_queue_Information, |
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216 | &the_message_queue->Object ); |
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217 | |
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218 | if ( the_message_queue->number_of_pending_messages != 0 ) |
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219 | (void) _Message_queue_Flush_support( the_message_queue ); |
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220 | else |
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221 | _Thread_queue_Flush( |
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222 | &the_message_queue->Wait_queue, |
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223 | _Message_queue_MP_Send_object_was_deleted |
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224 | ); |
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225 | |
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226 | _Message_queue_Free( the_message_queue ); |
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227 | |
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228 | if ( _Attributes_Is_global( the_message_queue->attribute_set ) ) { |
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229 | _Objects_MP_Close( |
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230 | &_Message_queue_Information, |
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231 | the_message_queue->Object.id |
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232 | ); |
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233 | |
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234 | _Message_queue_MP_Send_process_packet( |
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235 | MESSAGE_QUEUE_MP_ANNOUNCE_DELETE, |
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236 | the_message_queue->Object.id, |
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237 | 0, /* Not used */ |
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238 | MPCI_DEFAULT_TIMEOUT |
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239 | ); |
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240 | } |
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241 | |
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242 | _Thread_Enable_dispatch(); |
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243 | return( RTEMS_SUCCESSFUL ); |
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244 | } |
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245 | |
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246 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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247 | } |
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248 | |
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249 | /*PAGE |
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250 | * |
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251 | * rtems_message_queue_send |
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252 | * |
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253 | * This routine implements the directives q_send. It sends a |
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254 | * message to the specified message queue. |
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255 | * |
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256 | * Input parameters: |
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257 | * id - pointer to message queue |
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258 | * buffer - pointer to message buffer |
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259 | * |
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260 | * Output parameters: |
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261 | * RTEMS_SUCCESSFUL - if successful |
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262 | * error code - if unsuccessful |
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263 | */ |
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264 | |
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265 | rtems_status_code rtems_message_queue_send( |
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266 | Objects_Id id, |
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267 | void *buffer |
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268 | ) |
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269 | { |
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270 | return( _Message_queue_Submit( |
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271 | id, |
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272 | (Message_queue_Buffer *) buffer, |
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273 | MESSAGE_QUEUE_SEND_REQUEST |
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274 | ) |
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275 | ); |
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276 | } |
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277 | |
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278 | /*PAGE |
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279 | * |
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280 | * rtems_message_queue_urgent |
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281 | * |
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282 | * This routine implements the directives q_urgent. It urgents a |
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283 | * message to the specified message queue. |
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284 | * |
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285 | * Input parameters: |
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286 | * id - pointer to message queue |
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287 | * buffer - pointer to message buffer |
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288 | * |
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289 | * Output parameters: |
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290 | * RTEMS_SUCCESSFUL - if successful |
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291 | * error code - if unsuccessful |
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292 | */ |
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293 | |
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294 | rtems_status_code rtems_message_queue_urgent( |
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295 | Objects_Id id, |
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296 | void *buffer |
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297 | ) |
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298 | { |
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299 | return( _Message_queue_Submit( |
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300 | id, |
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301 | (Message_queue_Buffer *) buffer, |
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302 | MESSAGE_QUEUE_URGENT_REQUEST |
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303 | ) |
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304 | ); |
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305 | } |
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306 | |
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307 | /*PAGE |
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308 | * |
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309 | * rtems_message_queue_broadcast |
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310 | * |
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311 | * This directive sends a message for every thread waiting on the queue |
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312 | * designated by id. |
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313 | * |
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314 | * Input parameters: |
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315 | * id - pointer to message queue |
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316 | * buffer - pointer to message buffer |
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317 | * count - pointer to area to store number of threads made ready |
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318 | * |
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319 | * Output parameters: |
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320 | * count - number of threads made ready |
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321 | * RTEMS_SUCCESSFUL - if successful |
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322 | * error code - if unsuccessful |
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323 | */ |
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324 | |
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325 | rtems_status_code rtems_message_queue_broadcast( |
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326 | Objects_Id id, |
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327 | void *buffer, |
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328 | unsigned32 *count |
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329 | ) |
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330 | { |
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331 | register Message_queue_Control *the_message_queue; |
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332 | Objects_Locations location; |
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333 | Thread_Control *the_thread; |
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334 | unsigned32 number_broadcasted; |
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335 | |
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336 | the_message_queue = _Message_queue_Get( id, &location ); |
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337 | switch ( location ) { |
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338 | case OBJECTS_ERROR: |
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339 | return( RTEMS_INVALID_ID ); |
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340 | case OBJECTS_REMOTE: |
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341 | _Thread_Executing->Wait.return_argument = count; |
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342 | |
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343 | return |
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344 | _Message_queue_MP_Send_request_packet( |
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345 | MESSAGE_QUEUE_MP_BROADCAST_REQUEST, |
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346 | id, |
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347 | (Message_queue_Buffer *) buffer, |
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348 | 0, /* Not used */ |
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349 | MPCI_DEFAULT_TIMEOUT |
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350 | ); |
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351 | |
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352 | case OBJECTS_LOCAL: |
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353 | number_broadcasted = 0; |
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354 | while ( (the_thread = |
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355 | _Thread_queue_Dequeue(&the_message_queue->Wait_queue)) ) { |
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356 | number_broadcasted += 1; |
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357 | _Message_queue_Copy_buffer( |
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358 | (Message_queue_Buffer *) buffer, |
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359 | the_thread->Wait.return_argument |
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360 | ); |
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361 | |
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362 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) { |
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363 | the_thread->receive_packet->return_code = RTEMS_SUCCESSFUL; |
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364 | |
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365 | _Message_queue_MP_Send_response_packet( |
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366 | MESSAGE_QUEUE_MP_RECEIVE_RESPONSE, |
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367 | id, |
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368 | the_thread |
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369 | ); |
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370 | } |
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371 | } |
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372 | _Thread_Enable_dispatch(); |
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373 | *count = number_broadcasted; |
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374 | return( RTEMS_SUCCESSFUL ); |
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375 | } |
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376 | |
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377 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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378 | } |
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379 | |
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380 | /*PAGE |
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381 | * |
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382 | * rtems_message_queue_receive |
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383 | * |
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384 | * This directive dequeues a message from the designated message queue |
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385 | * and copies it into the requesting thread's buffer. |
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386 | * |
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387 | * Input parameters: |
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388 | * id - queue id |
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389 | * buffer - pointer to message buffer |
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390 | * option_set - options on receive |
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391 | * timeout - number of ticks to wait |
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392 | * |
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393 | * Output parameters: |
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394 | * RTEMS_SUCCESSFUL - if successful |
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395 | * error code - if unsuccessful |
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396 | */ |
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397 | |
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398 | rtems_status_code rtems_message_queue_receive( |
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399 | Objects_Id id, |
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400 | void *buffer, |
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401 | unsigned32 option_set, |
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402 | rtems_interval timeout |
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403 | ) |
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404 | { |
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405 | register Message_queue_Control *the_message_queue; |
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406 | Objects_Locations location; |
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407 | |
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408 | the_message_queue = _Message_queue_Get( id, &location ); |
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409 | switch ( location ) { |
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410 | case OBJECTS_ERROR: |
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411 | return( RTEMS_INVALID_ID ); |
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412 | case OBJECTS_REMOTE: |
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413 | _Thread_Executing->Wait.return_argument = buffer; |
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414 | return |
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415 | _Message_queue_MP_Send_request_packet( |
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416 | MESSAGE_QUEUE_MP_RECEIVE_REQUEST, |
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417 | id, |
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418 | buffer, |
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419 | option_set, |
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420 | timeout |
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421 | ); |
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422 | |
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423 | case OBJECTS_LOCAL: |
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424 | if ( !_Message_queue_Seize( the_message_queue, option_set, buffer ) ) |
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425 | _Thread_queue_Enqueue( &the_message_queue->Wait_queue, timeout ); |
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426 | _Thread_Enable_dispatch(); |
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427 | return( _Thread_Executing->Wait.return_code ); |
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428 | } |
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429 | |
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430 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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431 | } |
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432 | |
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433 | /*PAGE |
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434 | * |
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435 | * rtems_message_queue_flush |
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436 | * |
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437 | * This directive removes all pending messages from a queue and returns |
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438 | * the number of messages removed. If no messages were present then |
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439 | * a count of zero is returned. |
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440 | * |
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441 | * Input parameters: |
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442 | * id - queue id |
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443 | * count - return area for count |
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444 | * |
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445 | * Output parameters: |
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446 | * count - number of messages removed ( 0 = empty queue ) |
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447 | * RTEMS_SUCCESSFUL - if successful |
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448 | * error code - if unsuccessful |
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449 | */ |
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450 | |
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451 | rtems_status_code rtems_message_queue_flush( |
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452 | Objects_Id id, |
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453 | unsigned32 *count |
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454 | ) |
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455 | { |
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456 | register Message_queue_Control *the_message_queue; |
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457 | Objects_Locations location; |
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458 | |
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459 | the_message_queue = _Message_queue_Get( id, &location ); |
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460 | switch ( location ) { |
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461 | case OBJECTS_ERROR: |
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462 | return( RTEMS_INVALID_ID ); |
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463 | case OBJECTS_REMOTE: |
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464 | _Thread_Executing->Wait.return_argument = count; |
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465 | |
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466 | return |
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467 | _Message_queue_MP_Send_request_packet( |
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468 | MESSAGE_QUEUE_MP_FLUSH_REQUEST, |
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469 | id, |
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470 | 0, /* Not used */ |
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471 | 0, /* Not used */ |
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472 | MPCI_DEFAULT_TIMEOUT |
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473 | ); |
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474 | |
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475 | case OBJECTS_LOCAL: |
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476 | if ( the_message_queue->number_of_pending_messages != 0 ) |
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477 | *count = _Message_queue_Flush_support( the_message_queue ); |
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478 | else |
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479 | *count = 0; |
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480 | _Thread_Enable_dispatch(); |
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481 | return( RTEMS_SUCCESSFUL ); |
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482 | } |
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483 | |
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484 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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485 | } |
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486 | |
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487 | /*PAGE |
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488 | * |
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489 | * _Message_queue_Seize |
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490 | * |
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491 | * This kernel routine dequeues a message, copies the message buffer to |
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492 | * a given destination buffer, and frees the message buffer to the |
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493 | * inactive message pool. |
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494 | * |
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495 | * Input parameters: |
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496 | * the_message_queue - pointer to message queue |
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497 | * option_set - options on receive |
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498 | * the_buffer - pointer to message buffer to be filled |
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499 | * |
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500 | * Output parameters: |
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501 | * TRUE - if message received or RTEMS_NO_WAIT and no message |
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502 | * FALSE - if thread is to block |
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503 | * |
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504 | * NOTE: Dependent on BUFFER_LENGTH |
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505 | * |
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506 | * INTERRUPT LATENCY: |
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507 | * available |
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508 | * wait |
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509 | */ |
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510 | |
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511 | boolean _Message_queue_Seize( |
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512 | Message_queue_Control *the_message_queue, |
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513 | rtems_option option_set, |
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514 | Message_queue_Buffer *buffer |
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515 | ) |
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516 | { |
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517 | ISR_Level level; |
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518 | Message_queue_Buffer_control *the_message; |
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519 | Thread_Control *executing; |
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520 | |
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521 | executing = _Thread_Executing; |
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522 | executing->Wait.return_code = RTEMS_SUCCESSFUL; |
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523 | _ISR_Disable( level ); |
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524 | if ( the_message_queue->number_of_pending_messages != 0 ) { |
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525 | the_message_queue->number_of_pending_messages -= 1; |
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526 | |
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527 | the_message = _Message_queue_Get_pending_message( the_message_queue ); |
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528 | _ISR_Enable( level ); |
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529 | _Message_queue_Copy_buffer( &the_message->Contents, buffer ); |
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530 | _Message_queue_Free_message_buffer( the_message ); |
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531 | return( TRUE ); |
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532 | } |
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533 | |
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534 | if ( _Options_Is_no_wait( option_set ) ) { |
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535 | _ISR_Enable( level ); |
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536 | executing->Wait.return_code = RTEMS_UNSATISFIED; |
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537 | return( TRUE ); |
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538 | } |
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539 | |
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540 | the_message_queue->Wait_queue.sync = TRUE; |
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541 | executing->Wait.queue = &the_message_queue->Wait_queue; |
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542 | executing->Wait.id = the_message_queue->Object.id; |
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543 | executing->Wait.option_set = option_set; |
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544 | executing->Wait.return_argument = (unsigned32 *)buffer; |
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545 | _ISR_Enable( level ); |
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546 | return( FALSE ); |
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547 | } |
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548 | |
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549 | /*PAGE |
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550 | * |
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551 | * _Message_queue_Flush_support |
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552 | * |
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553 | * This message manager routine removes all messages from a message queue |
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554 | * and returns them to the inactive message pool. |
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555 | * |
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556 | * Input parameters: |
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557 | * the_message_queue - pointer to message queue |
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558 | * |
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559 | * Output parameters: |
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560 | * returns - number of messages placed on inactive chain |
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561 | * |
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562 | * INTERRUPT LATENCY: |
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563 | * only case |
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564 | */ |
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565 | |
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566 | unsigned32 _Message_queue_Flush_support( |
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567 | Message_queue_Control *the_message_queue |
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568 | ) |
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569 | { |
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570 | ISR_Level level; |
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571 | Chain_Node *inactive_first; |
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572 | Chain_Node *message_queue_first; |
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573 | Chain_Node *message_queue_last; |
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574 | unsigned32 count; |
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575 | |
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576 | _ISR_Disable( level ); |
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577 | inactive_first = _Message_queue_Inactive_messages.first; |
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578 | message_queue_first = the_message_queue->Pending_messages.first; |
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579 | message_queue_last = the_message_queue->Pending_messages.last; |
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580 | |
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581 | _Message_queue_Inactive_messages.first = message_queue_first; |
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582 | message_queue_last->next = inactive_first; |
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583 | inactive_first->previous = message_queue_last; |
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584 | message_queue_first->previous = |
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585 | _Chain_Head( &_Message_queue_Inactive_messages ); |
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586 | |
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587 | _Chain_Initialize_empty( &the_message_queue->Pending_messages ); |
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588 | |
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589 | count = the_message_queue->number_of_pending_messages; |
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590 | the_message_queue->number_of_pending_messages = 0; |
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591 | _ISR_Enable( level ); |
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592 | return( count ); |
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593 | } |
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594 | |
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595 | /*PAGE |
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596 | * |
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597 | * _Message_queue_Submit |
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598 | * |
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599 | * This routine implements the directives q_send and q_urgent. It |
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600 | * processes a message that is to be submitted to the designated |
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601 | * message queue. The message will either be processed as a send |
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602 | * send message which it will be inserted at the rear of the queue |
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603 | * or it will be processed as an urgent message which will be inserted |
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604 | * at the front of the queue. |
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605 | * |
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606 | * Input parameters: |
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607 | * id - pointer to message queue |
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608 | * the_buffer - pointer to message buffer |
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609 | * submit_type - send or urgent message |
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610 | * |
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611 | * Output parameters: |
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612 | * RTEMS_SUCCESSFUL - if successful |
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613 | * error code - if unsuccessful |
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614 | */ |
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615 | |
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616 | rtems_status_code _Message_queue_Submit( |
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617 | Objects_Id id, |
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618 | Message_queue_Buffer *buffer, |
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619 | Message_queue_Submit_types submit_type |
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620 | ) |
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621 | { |
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622 | register Message_queue_Control *the_message_queue; |
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623 | Objects_Locations location; |
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624 | Thread_Control *the_thread; |
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625 | Message_queue_Buffer_control *the_message; |
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626 | |
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627 | the_message_queue = _Message_queue_Get( id, &location ); |
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628 | switch ( location ) { |
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629 | case OBJECTS_ERROR: |
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630 | return( RTEMS_INVALID_ID ); |
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631 | case OBJECTS_REMOTE: |
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632 | switch ( submit_type ) { |
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633 | case MESSAGE_QUEUE_SEND_REQUEST: |
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634 | return |
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635 | _Message_queue_MP_Send_request_packet( |
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636 | MESSAGE_QUEUE_MP_SEND_REQUEST, |
---|
637 | id, |
---|
638 | buffer, |
---|
639 | 0, /* Not used */ |
---|
640 | MPCI_DEFAULT_TIMEOUT |
---|
641 | ); |
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642 | |
---|
643 | case MESSAGE_QUEUE_URGENT_REQUEST: |
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644 | return |
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645 | _Message_queue_MP_Send_request_packet( |
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646 | MESSAGE_QUEUE_MP_URGENT_REQUEST, |
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647 | id, |
---|
648 | buffer, |
---|
649 | 0, /* Not used */ |
---|
650 | MPCI_DEFAULT_TIMEOUT |
---|
651 | ); |
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652 | } |
---|
653 | case OBJECTS_LOCAL: |
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654 | the_thread = _Thread_queue_Dequeue( &the_message_queue->Wait_queue ); |
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655 | |
---|
656 | if ( the_thread ) { |
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657 | |
---|
658 | _Message_queue_Copy_buffer( |
---|
659 | buffer, |
---|
660 | the_thread->Wait.return_argument |
---|
661 | ); |
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662 | |
---|
663 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) { |
---|
664 | the_thread->receive_packet->return_code = RTEMS_SUCCESSFUL; |
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665 | |
---|
666 | _Message_queue_MP_Send_response_packet( |
---|
667 | MESSAGE_QUEUE_MP_RECEIVE_RESPONSE, |
---|
668 | id, |
---|
669 | the_thread |
---|
670 | ); |
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671 | |
---|
672 | } |
---|
673 | _Thread_Enable_dispatch(); |
---|
674 | return( RTEMS_SUCCESSFUL ); |
---|
675 | } |
---|
676 | |
---|
677 | if ( the_message_queue->number_of_pending_messages == |
---|
678 | the_message_queue->maximum_pending_messages ) { |
---|
679 | _Thread_Enable_dispatch(); |
---|
680 | return( RTEMS_TOO_MANY ); |
---|
681 | } |
---|
682 | |
---|
683 | the_message = _Message_queue_Allocate_message_buffer(); |
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684 | |
---|
685 | if ( !the_message ) { |
---|
686 | _Thread_Enable_dispatch(); |
---|
687 | return( RTEMS_UNSATISFIED ); |
---|
688 | } |
---|
689 | |
---|
690 | _Message_queue_Copy_buffer( buffer, &the_message->Contents ); |
---|
691 | |
---|
692 | the_message_queue->number_of_pending_messages += 1; |
---|
693 | |
---|
694 | switch ( submit_type ) { |
---|
695 | case MESSAGE_QUEUE_SEND_REQUEST: |
---|
696 | _Message_queue_Append( the_message_queue, the_message ); |
---|
697 | break; |
---|
698 | case MESSAGE_QUEUE_URGENT_REQUEST: |
---|
699 | _Message_queue_Prepend( the_message_queue, the_message ); |
---|
700 | break; |
---|
701 | } |
---|
702 | |
---|
703 | _Thread_Enable_dispatch(); |
---|
704 | return( RTEMS_SUCCESSFUL ); |
---|
705 | } |
---|
706 | |
---|
707 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
---|
708 | } |
---|