1 | /* |
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2 | * ITRON 3.0 Mailbox Manager |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.OARcorp.com/rtems/license.html. |
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7 | * |
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8 | * $Id$ |
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9 | */ |
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10 | |
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11 | #include <itron.h> |
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12 | |
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13 | #include <rtems/itron/mbox.h> |
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14 | #include <rtems/itron/task.h> |
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15 | |
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16 | /* |
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17 | * _ITRON_Mailbox_Translate_core_message_queue_return_code |
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18 | * |
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19 | * This routine translates a core message queue object status |
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20 | * into the appropriate ITRON status code. |
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21 | */ |
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22 | |
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23 | ER _ITRON_Mailbox_Translate_core_message_queue_return_code( |
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24 | CORE_message_queue_Status status |
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25 | ) |
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26 | { |
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27 | switch (status) { |
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28 | case CORE_MESSAGE_QUEUE_STATUS_SUCCESSFUL: |
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29 | return E_OK; |
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30 | case CORE_MESSAGE_QUEUE_STATUS_TOO_MANY: |
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31 | return E_TMOUT; |
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32 | case CORE_MESSAGE_QUEUE_STATUS_INVALID_SIZE: |
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33 | return E_PAR; |
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34 | case CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_NOWAIT: |
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35 | return E_TMOUT; |
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36 | case CORE_MESSAGE_QUEUE_STATUS_TIMEOUT: |
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37 | return E_TMOUT; |
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38 | default: |
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39 | return E_ID; |
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40 | } |
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41 | } |
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42 | |
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43 | /* |
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44 | * _ITRON_Mailbox_Manager_initialization |
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45 | * |
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46 | * This routine initializes all mailboxes manager related data structures. |
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47 | * |
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48 | * Input parameters: |
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49 | * maximum_mailboxes - maximum configured mailboxes |
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50 | * |
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51 | * Output parameters: NONE |
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52 | */ |
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53 | |
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54 | void _ITRON_Mailbox_Manager_initialization( |
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55 | unsigned32 maximum_mailboxes |
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56 | ) |
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57 | { |
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58 | _Objects_Initialize_information( |
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59 | &_ITRON_Mailbox_Information, /* object information table */ |
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60 | OBJECTS_ITRON_MAILBOXES, /* object class */ |
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61 | FALSE, /* TRUE if this is a global */ |
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62 | /* object class */ |
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63 | maximum_mailboxes, /* maximum objects of this class */ |
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64 | sizeof( ITRON_Mailbox_Control ), /* size of this object's control block */ |
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65 | FALSE, /* TRUE if names for this object */ |
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66 | /* are strings */ |
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67 | RTEMS_MAXIMUM_NAME_LENGTH, /* maximum length of each object's */ |
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68 | /* name */ |
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69 | FALSE /* TRUE if this class is threads */ |
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70 | ); |
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71 | |
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72 | /* |
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73 | * Register the MP Process Packet routine. |
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74 | * |
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75 | * NOTE: No MP Support YET in RTEMS ITRON implementation. |
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76 | */ |
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77 | |
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78 | } |
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79 | |
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80 | |
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81 | /* |
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82 | * cre_mbx - Create Mailbox |
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83 | * |
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84 | * Creates a Mailbox according to the following spec: |
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85 | * |
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86 | * ------Parameters------------------------- |
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87 | * ID mbxid MailboxID |
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88 | * T_CMBX *pk_cmbx Packet to Create Mailbox |
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89 | * ----------------------------------------- |
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90 | * -*pk_cmbx members*- |
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91 | * VP exinf ExtendedInformation |
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92 | * ATR mbxatr MailboxAttributes |
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93 | * (the use of the following information |
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94 | * is implementation dependent) |
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95 | * INT bufcnt BufferMessageCount |
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96 | * (CPU and/or implementation-dependent information |
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97 | * may also be included) |
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98 | * |
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99 | * ----Return Parameters-------------------- |
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100 | * ER ercd ErrorCode |
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101 | * ----------------------------------------- |
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102 | * |
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103 | * |
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104 | * ----C Language Interface----------------- |
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105 | * ER ercd = cre_mbx ( ID mbxid, T_CMBX *pk_cmbx ) ; |
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106 | * ----------------------------------------- |
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107 | * |
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108 | */ |
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109 | |
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110 | ER cre_mbx( |
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111 | ID mbxid, |
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112 | T_CMBX *pk_cmbx |
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113 | ) |
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114 | { |
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115 | register ITRON_Mailbox_Control *the_mailbox; |
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116 | CORE_message_queue_Attributes the_mailbox_attributes; |
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117 | |
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118 | if ( !pk_cmbx ) |
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119 | return E_PAR; |
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120 | |
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121 | if ((pk_cmbx->mbxatr & (TA_TPRI | TA_MPRI)) != 0 ) |
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122 | return E_RSATR; |
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123 | |
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124 | _Thread_Disable_dispatch(); /* protects object pointer */ |
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125 | |
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126 | the_mailbox = _ITRON_Mailbox_Allocate( mbxid ); |
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127 | if ( !the_mailbox ) { |
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128 | _Thread_Enable_dispatch(); |
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129 | return _ITRON_Mailbox_Clarify_allocation_id_error( mbxid ); |
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130 | } |
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131 | |
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132 | the_mailbox->count = pk_cmbx->bufcnt; |
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133 | if (pk_cmbx->mbxatr & TA_MPRI) |
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134 | the_mailbox->do_message_priority = TRUE; |
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135 | else |
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136 | the_mailbox->do_message_priority = FALSE; |
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137 | |
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138 | if (pk_cmbx->mbxatr & TA_TPRI) |
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139 | the_mailbox_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY; |
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140 | else |
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141 | the_mailbox_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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142 | |
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143 | if ( !_CORE_message_queue_Initialize( |
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144 | &the_mailbox->message_queue, |
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145 | OBJECTS_ITRON_MAILBOXES, |
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146 | &the_mailbox_attributes, |
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147 | the_mailbox->count, |
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148 | sizeof(T_MSG *), |
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149 | NULL ) ) { /* Multiprocessing not supported */ |
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150 | _ITRON_Mailbox_Free(the_mailbox); |
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151 | _ITRON_return_errorno( E_OBJ ); |
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152 | } |
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153 | |
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154 | _ITRON_Objects_Open( &_ITRON_Mailbox_Information, &the_mailbox->Object ); |
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155 | |
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156 | /* |
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157 | * If multiprocessing were supported, this is where we would announce |
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158 | * the existence of the semaphore to the rest of the system. |
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159 | */ |
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160 | |
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161 | #if defined(RTEMS_MULTIPROCESSING) |
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162 | #endif |
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163 | |
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164 | _ITRON_return_errorno( E_OK ); |
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165 | } |
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166 | |
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167 | /* |
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168 | * del_mbx - Delete Mailbox |
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169 | * |
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170 | * |
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171 | * ------Parameters-------------- |
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172 | * ID mbxid The Mailbox's ID |
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173 | * ------------------------------ |
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174 | * |
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175 | * -----Return Parameters------- |
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176 | * ER ercd Itron Error Code |
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177 | * ----------------------------- |
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178 | * |
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179 | * -----C Language Interface---- |
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180 | * ER ercd = del_mbx(ID mbxid); |
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181 | * ----------------------------- |
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182 | * |
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183 | */ |
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184 | |
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185 | ER del_mbx( |
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186 | ID mbxid |
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187 | ) |
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188 | { |
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189 | register ITRON_Mailbox_Control *the_mailbox; |
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190 | Objects_Locations location; |
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191 | |
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192 | the_mailbox= _ITRON_Mailbox_Get( mbxid, &location ); |
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193 | switch ( location ) { |
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194 | case OBJECTS_ERROR: |
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195 | case OBJECTS_REMOTE: |
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196 | return _ITRON_Mailbox_Clarify_get_id_error( mbxid ); |
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197 | |
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198 | case OBJECTS_LOCAL: |
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199 | _Objects_Close( &_ITRON_Mailbox_Information, &the_mailbox->Object ); |
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200 | |
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201 | _CORE_message_queue_Close( |
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202 | &the_mailbox->message_queue, |
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203 | NULL, /* Multiprocessing not supported */ |
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204 | CORE_MESSAGE_QUEUE_STATUS_WAS_DELETED |
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205 | ); |
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206 | |
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207 | _ITRON_Mailbox_Free(the_mailbox); |
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208 | break; |
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209 | } |
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210 | |
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211 | _ITRON_return_errorno( E_OK ); |
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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 | * snd_msg - Send Message to Mailbox |
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217 | */ |
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218 | |
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219 | ER snd_msg( |
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220 | ID mbxid, |
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221 | T_MSG *pk_msg |
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222 | ) |
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223 | { |
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224 | register ITRON_Mailbox_Control *the_mailbox; |
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225 | Objects_Locations location; |
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226 | CORE_message_queue_Status status = E_OK; |
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227 | unsigned32 message_priority; |
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228 | void *message_contents; |
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229 | |
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230 | if ( !pk_msg ) |
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231 | return E_PAR; |
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232 | |
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233 | the_mailbox = _ITRON_Mailbox_Get( mbxid, &location ); |
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234 | switch ( location ) { |
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235 | case OBJECTS_REMOTE: |
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236 | case OBJECTS_ERROR: |
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237 | return _ITRON_Mailbox_Clarify_get_id_error( mbxid ); |
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238 | |
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239 | case OBJECTS_LOCAL: |
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240 | if ( the_mailbox->do_message_priority ) |
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241 | message_priority = pk_msg->msgpri; |
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242 | else |
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243 | message_priority = CORE_MESSAGE_QUEUE_SEND_REQUEST; |
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244 | |
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245 | message_contents = pk_msg; |
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246 | status = _CORE_message_queue_Submit( |
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247 | &the_mailbox->message_queue, |
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248 | &message_contents, |
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249 | sizeof(T_MSG *), |
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250 | the_mailbox->Object.id, |
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251 | NULL, /* multiprocessing not supported */ |
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252 | message_priority |
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253 | ); |
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254 | break; |
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255 | } |
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256 | |
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257 | _ITRON_return_errorno( |
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258 | _ITRON_Mailbox_Translate_core_message_queue_return_code(status) ); |
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259 | } |
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260 | |
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261 | /* |
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262 | * rcv_msg - Receive Message from Mailbox |
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263 | */ |
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264 | |
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265 | ER rcv_msg( |
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266 | T_MSG **ppk_msg, |
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267 | ID mbxid |
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268 | ) |
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269 | { |
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270 | return trcv_msg( ppk_msg, mbxid, TMO_FEVR ); |
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271 | } |
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272 | |
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273 | /* |
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274 | * prcv_msg - Poll and Receive Message from Mailbox |
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275 | */ |
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276 | |
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277 | ER prcv_msg( |
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278 | T_MSG **ppk_msg, |
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279 | ID mbxid |
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280 | ) |
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281 | { |
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282 | return trcv_msg( ppk_msg, mbxid, TMO_POL ); |
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283 | } |
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284 | |
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285 | /* |
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286 | * trcv_msg - Receive Message from Mailbox with Timeout |
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287 | */ |
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288 | |
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289 | ER trcv_msg( |
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290 | T_MSG **ppk_msg, |
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291 | ID mbxid, |
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292 | TMO tmout |
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293 | ) |
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294 | { |
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295 | register ITRON_Mailbox_Control *the_mailbox; |
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296 | Watchdog_Interval interval; |
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297 | boolean wait; |
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298 | Objects_Locations location; |
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299 | unsigned32 size; |
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300 | |
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301 | if (!ppk_msg) |
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302 | return E_PAR; |
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303 | |
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304 | interval = 0; |
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305 | if ( tmout == TMO_POL ) { |
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306 | wait = FALSE; |
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307 | } else { |
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308 | wait = TRUE; |
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309 | if ( tmout != TMO_FEVR ) |
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310 | interval = TOD_MILLISECONDS_TO_TICKS(tmout); |
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311 | } |
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312 | |
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313 | if ( wait && _ITRON_Is_in_non_task_state() ) |
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314 | return E_CTX; |
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315 | |
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316 | the_mailbox = _ITRON_Mailbox_Get( mbxid, &location ); |
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317 | switch ( location ) { |
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318 | case OBJECTS_REMOTE: |
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319 | case OBJECTS_ERROR: |
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320 | return _ITRON_Mailbox_Clarify_get_id_error( mbxid ); |
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321 | |
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322 | case OBJECTS_LOCAL: |
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323 | |
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324 | _CORE_message_queue_Seize( |
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325 | &the_mailbox->message_queue, |
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326 | the_mailbox->Object.id, |
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327 | ppk_msg, |
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328 | &size, |
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329 | wait, |
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330 | interval |
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331 | ); |
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332 | break; |
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333 | } |
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334 | |
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335 | _ITRON_return_errorno( |
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336 | _ITRON_Mailbox_Translate_core_message_queue_return_code( |
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337 | _Thread_Executing->Wait.return_code ) ); |
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338 | } |
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339 | |
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340 | /* |
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341 | * ref_mbx - Reference Mailbox Status |
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342 | */ |
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343 | |
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344 | ER ref_mbx( |
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345 | T_RMBX *pk_rmbx, |
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346 | ID mbxid |
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347 | ) |
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348 | { |
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349 | register ITRON_Mailbox_Control *the_mailbox; |
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350 | Objects_Locations location; |
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351 | Chain_Control *pending; |
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352 | |
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353 | if ( !pk_rmbx ) |
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354 | return E_PAR; |
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355 | |
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356 | the_mailbox = _ITRON_Mailbox_Get( mbxid, &location ); |
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357 | switch ( location ) { |
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358 | case OBJECTS_REMOTE: |
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359 | case OBJECTS_ERROR: |
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360 | return _ITRON_Mailbox_Clarify_get_id_error( mbxid ); |
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361 | |
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362 | case OBJECTS_LOCAL: |
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363 | |
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364 | pending = &the_mailbox->message_queue.Pending_messages; |
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365 | if ( _Chain_Is_empty( pending ) ) |
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366 | pk_rmbx->pk_msg = NULL; |
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367 | else |
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368 | pk_rmbx->pk_msg = (T_MSG *) pending->first; |
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369 | |
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370 | /* |
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371 | * Fill in whether or not there is a waiting task |
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372 | */ |
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373 | |
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374 | if ( !_Thread_queue_First( &the_mailbox->message_queue.Wait_queue ) ) |
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375 | pk_rmbx->wtsk = FALSE; |
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376 | else |
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377 | pk_rmbx->wtsk = TRUE; |
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378 | |
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379 | break; |
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380 | } |
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381 | _ITRON_return_errorno( E_OK ); |
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382 | } |
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383 | |
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