1 | /* |
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2 | * ITRON Message Buffer 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/msgbuffer.h> |
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14 | #include <rtems/itron/task.h> |
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15 | |
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16 | ER _ITRON_Message_buffer_Translate_core_message_buffer_return_code( |
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17 | CORE_message_queue_Status status |
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18 | ) |
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19 | { |
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20 | switch (status) { |
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21 | case CORE_MESSAGE_QUEUE_STATUS_SUCCESSFUL: |
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22 | return E_OK; |
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23 | case CORE_MESSAGE_QUEUE_STATUS_TOO_MANY: |
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24 | return E_TMOUT; |
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25 | case CORE_MESSAGE_QUEUE_STATUS_INVALID_SIZE: |
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26 | return E_PAR; |
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27 | case CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_NOWAIT: |
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28 | return E_TMOUT; |
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29 | case CORE_MESSAGE_QUEUE_STATUS_TIMEOUT: |
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30 | return E_TMOUT; |
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31 | default: |
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32 | return E_ID; |
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33 | } |
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34 | } |
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35 | |
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36 | /* |
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37 | * _ITRON_Message_buffer_Manager_initialization |
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38 | * |
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39 | * This routine initializes all message buffer manager related data |
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40 | * structures. |
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41 | * |
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42 | * Input parameters: |
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43 | * maximum_message_buffers - maximum configured message buffers |
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44 | * |
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45 | * Output parameters: NONE |
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46 | */ |
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47 | |
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48 | void _ITRON_Message_buffer_Manager_initialization( |
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49 | unsigned32 maximum_message_buffers |
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50 | ) |
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51 | { |
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52 | _Objects_Initialize_information( |
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53 | &_ITRON_Message_buffer_Information, /* object information table */ |
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54 | OBJECTS_ITRON_MESSAGE_BUFFERS, /* object class */ |
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55 | FALSE, /* TRUE if this is a |
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56 | global object class */ |
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57 | maximum_message_buffers, /* maximum objects of this class */ |
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58 | sizeof( ITRON_Message_buffer_Control ), /* size of this |
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59 | object's control |
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60 | block */ |
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61 | FALSE, /* TRUE if names for this |
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62 | object are strings */ |
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63 | RTEMS_MAXIMUM_NAME_LENGTH, /* maximum length of each |
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64 | object's name */ |
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65 | FALSE /* TRUE if this class is threads */ |
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66 | ); |
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67 | |
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68 | /* |
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69 | * Register the MP Process Packet routine. |
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70 | * |
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71 | * NOTE: No MP Support YET in RTEMS ITRON implementation. |
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72 | */ |
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73 | } |
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74 | |
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75 | /* |
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76 | * cre_mbf - Create MessageBuffer |
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77 | */ |
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78 | |
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79 | ER cre_mbf( |
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80 | ID mbfid, |
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81 | T_CMBF *pk_cmbf |
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82 | ) |
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83 | { |
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84 | CORE_message_queue_Attributes the_message_queue_attributes; |
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85 | ITRON_Message_buffer_Control *the_message_buffer; |
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86 | |
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87 | /* |
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88 | * Bad pointer to the attributes structure |
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89 | */ |
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90 | |
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91 | if ( !pk_cmbf ) |
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92 | return E_PAR; |
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93 | |
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94 | /* |
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95 | * Bits were set that were note defined. |
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96 | */ |
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97 | |
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98 | if (pk_cmbf->mbfatr & ~(TA_TPRI)) |
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99 | return E_RSATR; |
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100 | |
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101 | if (pk_cmbf->bufsz < 0 || pk_cmbf->maxmsz < 0) |
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102 | return E_PAR; |
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103 | |
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104 | if (pk_cmbf->bufsz < pk_cmbf->maxmsz) |
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105 | return E_PAR; |
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106 | |
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107 | _Thread_Disable_dispatch(); /* prevents deletion */ |
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108 | |
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109 | the_message_buffer = _ITRON_Message_buffer_Allocate(mbfid); |
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110 | if ( !the_message_buffer ) { |
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111 | _Thread_Enable_dispatch(); |
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112 | return _ITRON_Message_buffer_Clarify_allocation_id_error(mbfid); |
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113 | } |
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114 | |
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115 | if ( pk_cmbf->mbfatr & TA_TPRI ) |
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116 | the_message_queue_attributes.discipline = |
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117 | CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY; |
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118 | else |
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119 | the_message_queue_attributes.discipline = |
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120 | CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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121 | |
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122 | _CORE_message_queue_Initialize( |
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123 | &the_message_buffer->message_queue, |
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124 | OBJECTS_ITRON_MESSAGE_BUFFERS, |
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125 | &the_message_queue_attributes, |
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126 | pk_cmbf->bufsz / pk_cmbf->maxmsz, |
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127 | pk_cmbf->maxmsz, |
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128 | NULL /* Multiprocessing not supported */ |
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129 | ); |
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130 | |
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131 | _ITRON_Objects_Open( &_ITRON_Message_buffer_Information, |
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132 | &the_message_buffer->Object ); |
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133 | |
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134 | /* |
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135 | * If multiprocessing were supported, this is where we would announce |
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136 | * the existence of the semaphore to the rest of the system. |
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137 | */ |
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138 | |
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139 | #if defined(RTEMS_MULTIPROCESSING) |
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140 | #endif |
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141 | |
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142 | _Thread_Enable_dispatch(); |
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143 | |
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144 | return E_OK; |
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145 | } |
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146 | |
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147 | /* |
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148 | * del_mbf - Delete MessageBuffer |
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149 | */ |
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150 | |
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151 | ER del_mbf( |
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152 | ID mbfid |
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153 | ) |
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154 | { |
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155 | ITRON_Message_buffer_Control *the_message_buffer; |
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156 | Objects_Locations location; |
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157 | |
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158 | the_message_buffer = _ITRON_Message_buffer_Get(mbfid, &location); |
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159 | switch (location) { |
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160 | case OBJECTS_REMOTE: |
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161 | case OBJECTS_ERROR: /* Multiprocessing not supported */ |
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162 | return _ITRON_Message_buffer_Clarify_get_id_error(mbfid); |
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163 | |
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164 | case OBJECTS_LOCAL: |
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165 | _CORE_message_queue_Flush(&the_message_buffer->message_queue); |
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166 | _ITRON_Objects_Close( &_ITRON_Message_buffer_Information, |
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167 | &the_message_buffer->Object); |
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168 | _ITRON_Message_buffer_Free(the_message_buffer); |
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169 | |
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170 | /* |
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171 | * If multiprocessing were supported, this is where we would announce |
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172 | * the existence of the semaphore to the rest of the system. |
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173 | */ |
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174 | |
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175 | #if defined(RTEMS_MULTIPROCESSING) |
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176 | #endif |
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177 | _Thread_Enable_dispatch(); |
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178 | return E_OK; |
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179 | } |
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180 | |
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181 | return E_OK; |
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182 | } |
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183 | |
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184 | /* |
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185 | * snd_mbf - Send Message to MessageBuffer |
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186 | */ |
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187 | |
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188 | ER snd_mbf( |
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189 | ID mbfid, |
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190 | VP msg, |
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191 | INT msgsz |
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192 | ) |
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193 | { |
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194 | return E_OK; |
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195 | } |
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196 | |
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197 | /* |
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198 | * psnd_mbf - Poll and Send Message to MessageBuffer |
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199 | */ |
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200 | |
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201 | ER psnd_mbf( |
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202 | ID mbfid, |
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203 | VP msg, |
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204 | INT msgsz |
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205 | ) |
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206 | { |
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207 | ITRON_Message_buffer_Control *the_message_buffer; |
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208 | Objects_Locations location; |
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209 | CORE_message_queue_Status status; |
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210 | |
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211 | if (msgsz <= 0 || !msg) |
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212 | return E_PAR; |
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213 | |
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214 | the_message_buffer = _ITRON_Message_buffer_Get(mbfid, &location); |
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215 | switch (location) { |
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216 | case OBJECTS_REMOTE: |
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217 | case OBJECTS_ERROR: /* Multiprocessing not supported */ |
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218 | return _ITRON_Message_buffer_Clarify_get_id_error(mbfid); |
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219 | |
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220 | case OBJECTS_LOCAL: |
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221 | status = _CORE_message_queue_Submit( |
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222 | &the_message_buffer->message_queue, |
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223 | msg, |
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224 | msgsz, |
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225 | the_message_buffer->Object.id, |
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226 | NULL, |
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227 | CORE_MESSAGE_QUEUE_SEND_REQUEST |
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228 | ); |
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229 | _Thread_Enable_dispatch(); |
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230 | return |
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231 | _ITRON_Message_buffer_Translate_core_message_buffer_return_code(status); |
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232 | } |
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233 | |
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234 | /* |
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235 | * If multiprocessing were supported, this is where we would announce |
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236 | * the existence of the semaphore to the rest of the system. |
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237 | */ |
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238 | |
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239 | #if defined(RTEMS_MULTIPROCESSING) |
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240 | #endif |
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241 | |
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242 | return E_OK; |
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243 | } |
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244 | |
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245 | /* |
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246 | * tsnd_mbf - Send Message to MessageBuffer with Timeout |
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247 | */ |
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248 | |
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249 | ER tsnd_mbf( |
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250 | ID mbfid, |
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251 | VP msg, |
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252 | INT msgsz, |
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253 | TMO tmout |
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254 | ) |
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255 | { |
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256 | return E_OK; |
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257 | } |
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258 | |
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259 | /* |
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260 | * rcv_mbf - Receive Message from MessageBuffer |
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261 | */ |
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262 | |
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263 | ER rcv_mbf( |
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264 | VP msg, |
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265 | INT *p_msgsz, |
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266 | ID mbfid |
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267 | ) |
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268 | { |
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269 | return trcv_mbf(msg, p_msgsz, mbfid, TMO_FEVR); |
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270 | } |
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271 | |
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272 | /* |
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273 | * prcv_mbf - Poll and Receive Message from MessageBuffer |
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274 | */ |
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275 | |
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276 | ER prcv_mbf( |
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277 | VP msg, |
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278 | INT *p_msgsz, |
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279 | ID mbfid |
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280 | ) |
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281 | { |
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282 | return trcv_mbf(msg, p_msgsz, mbfid, TMO_POL); |
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283 | } |
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284 | |
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285 | /* |
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286 | * trcv_mbf - Receive Message from MessageBuffer with Timeout |
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287 | */ |
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288 | |
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289 | ER trcv_mbf( |
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290 | VP msg, |
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291 | INT *p_msgsz, |
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292 | ID mbfid, |
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293 | TMO tmout |
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294 | ) |
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295 | { |
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296 | ITRON_Message_buffer_Control *the_message_buffer; |
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297 | Objects_Locations location; |
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298 | CORE_message_queue_Status status; |
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299 | boolean wait; |
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300 | Watchdog_Interval interval; |
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301 | |
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302 | interval = 0; |
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303 | if (tmout == TMO_POL) { |
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304 | wait = FALSE; |
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305 | } else { |
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306 | wait = TRUE; |
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307 | if (tmout != TMO_FEVR) |
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308 | interval = TOD_MILLISECONDS_TO_TICKS(tmout); |
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309 | } |
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310 | |
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311 | if (wait && _ITRON_Is_in_non_task_state() ) |
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312 | return E_CTX; |
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313 | |
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314 | if (!p_msgsz || !msg || tmout <= -2) |
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315 | return E_PAR; |
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316 | |
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317 | the_message_buffer = _ITRON_Message_buffer_Get(mbfid, &location); |
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318 | switch (location) { |
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319 | case OBJECTS_REMOTE: |
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320 | case OBJECTS_ERROR: /* Multiprocessing not supported */ |
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321 | return _ITRON_Message_buffer_Clarify_get_id_error(mbfid); |
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322 | |
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323 | case OBJECTS_LOCAL: |
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324 | _CORE_message_queue_Seize( |
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325 | &the_message_buffer->message_queue, |
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326 | the_message_buffer->Object.id, |
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327 | msg, |
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328 | p_msgsz, |
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329 | wait, |
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330 | interval |
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331 | ); |
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332 | _Thread_Enable_dispatch(); |
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333 | status = (CORE_message_queue_Status)_Thread_Executing->Wait.return_code; |
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334 | return |
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335 | _ITRON_Message_buffer_Translate_core_message_buffer_return_code(status); |
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336 | } |
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337 | |
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338 | /* |
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339 | * If multiprocessing were supported, this is where we would announce |
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340 | * the existence of the semaphore to the rest of the system. |
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341 | */ |
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342 | |
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343 | #if defined(RTEMS_MULTIPROCESSING) |
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344 | #endif |
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345 | return E_OK; |
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346 | } |
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347 | |
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348 | /* |
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349 | * ref_mbf - Reference MessageBuffer Status |
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350 | */ |
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351 | |
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352 | ER ref_mbf( |
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353 | T_RMBF *pk_rmbf, |
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354 | ID mbfid |
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355 | ) |
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356 | { |
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357 | ITRON_Message_buffer_Control *the_message_buffer; |
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358 | Objects_Locations location; |
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359 | CORE_message_queue_Control *the_core_msgq; |
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360 | |
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361 | if ( !pk_rmbf ) |
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362 | return E_PAR; /* XXX check this error code */ |
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363 | |
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364 | the_message_buffer = _ITRON_Message_buffer_Get( mbfid, &location ); |
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365 | switch ( location ) { |
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366 | case OBJECTS_REMOTE: /* Multiprocessing not supported */ |
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367 | case OBJECTS_ERROR: |
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368 | return _ITRON_Message_buffer_Clarify_get_id_error( mbfid ); |
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369 | |
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370 | case OBJECTS_LOCAL: |
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371 | the_core_msgq = &the_message_buffer->message_queue; |
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372 | |
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373 | /* |
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374 | * Fill in the size of message to be sent |
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375 | */ |
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376 | |
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377 | if (the_core_msgq->number_of_pending_messages == 0) { |
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378 | pk_rmbf->msgsz = 0; |
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379 | } else { |
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380 | pk_rmbf->msgsz = ((CORE_message_queue_Buffer_control *) |
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381 | the_core_msgq->Pending_messages.first)->Contents.size; |
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382 | } |
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383 | |
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384 | /* |
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385 | * Fill in the size of free buffer |
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386 | */ |
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387 | |
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388 | pk_rmbf->frbufsz = |
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389 | (the_core_msgq->maximum_pending_messages - |
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390 | the_core_msgq->number_of_pending_messages) * |
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391 | the_core_msgq->maximum_message_size; |
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392 | |
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393 | |
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394 | /* |
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395 | * Fill in whether or not there is a waiting task |
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396 | */ |
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397 | |
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398 | if ( !_Thread_queue_First(&the_core_msgq->Wait_queue ) ) |
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399 | pk_rmbf->wtsk = FALSE; |
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400 | else |
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401 | pk_rmbf->wtsk = TRUE; |
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402 | |
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403 | pk_rmbf->stsk = FALSE; |
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404 | _Thread_Enable_dispatch(); |
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405 | return E_OK; |
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406 | } |
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407 | return E_OK; |
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408 | } |
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