1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Create Message Queue |
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5 | * @ingroup ClassicMessageQueue |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/system.h> |
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22 | #include <rtems/score/sysstate.h> |
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23 | #include <rtems/score/chain.h> |
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24 | #include <rtems/score/isr.h> |
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25 | #include <rtems/score/coremsgimpl.h> |
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26 | #include <rtems/score/object.h> |
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27 | #include <rtems/score/states.h> |
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28 | #include <rtems/score/thread.h> |
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29 | #include <rtems/score/wkspace.h> |
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30 | #if defined(RTEMS_MULTIPROCESSING) |
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31 | #include <rtems/score/mpci.h> |
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32 | #endif |
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33 | #include <rtems/rtems/status.h> |
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34 | #include <rtems/rtems/attrimpl.h> |
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35 | #include <rtems/rtems/messageimpl.h> |
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36 | #include <rtems/rtems/options.h> |
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37 | #include <rtems/rtems/support.h> |
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38 | |
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39 | rtems_status_code rtems_message_queue_create( |
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40 | rtems_name name, |
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41 | uint32_t count, |
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42 | size_t max_message_size, |
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43 | rtems_attribute attribute_set, |
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44 | rtems_id *id |
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45 | ) |
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46 | { |
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47 | register Message_queue_Control *the_message_queue; |
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48 | CORE_message_queue_Attributes the_msgq_attributes; |
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49 | #if defined(RTEMS_MULTIPROCESSING) |
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50 | bool is_global; |
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51 | #endif |
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52 | |
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53 | if ( !rtems_is_name_valid( name ) ) |
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54 | return RTEMS_INVALID_NAME; |
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55 | |
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56 | if ( !id ) |
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57 | return RTEMS_INVALID_ADDRESS; |
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58 | |
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59 | #if defined(RTEMS_MULTIPROCESSING) |
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60 | if ( (is_global = _Attributes_Is_global( attribute_set ) ) && |
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61 | !_System_state_Is_multiprocessing ) |
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62 | return RTEMS_MP_NOT_CONFIGURED; |
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63 | #endif |
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64 | |
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65 | if ( count == 0 ) |
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66 | return RTEMS_INVALID_NUMBER; |
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67 | |
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68 | if ( max_message_size == 0 ) |
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69 | return RTEMS_INVALID_SIZE; |
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70 | |
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71 | #if defined(RTEMS_MULTIPROCESSING) |
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72 | #if 1 |
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73 | /* |
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74 | * I am not 100% sure this should be an error. |
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75 | * It seems reasonable to create a que with a large max size, |
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76 | * and then just send smaller msgs from remote (or all) nodes. |
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77 | */ |
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78 | if ( is_global ) { |
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79 | size_t max_packet_payload_size = _MPCI_table->maximum_packet_size |
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80 | - MESSAGE_QUEUE_MP_PACKET_SIZE; |
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81 | |
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82 | if ( max_message_size > max_packet_payload_size ) { |
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83 | return RTEMS_INVALID_SIZE; |
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84 | } |
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85 | } |
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86 | #endif |
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87 | #endif |
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88 | |
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89 | _Thread_Disable_dispatch(); /* protects object pointer */ |
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90 | |
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91 | the_message_queue = _Message_queue_Allocate(); |
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92 | |
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93 | if ( !the_message_queue ) { |
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94 | _Thread_Enable_dispatch(); |
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95 | return RTEMS_TOO_MANY; |
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96 | } |
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97 | |
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98 | #if defined(RTEMS_MULTIPROCESSING) |
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99 | if ( is_global && |
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100 | !( _Objects_MP_Allocate_and_open( &_Message_queue_Information, |
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101 | name, the_message_queue->Object.id, false ) ) ) { |
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102 | _Message_queue_Free( the_message_queue ); |
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103 | _Thread_Enable_dispatch(); |
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104 | return RTEMS_TOO_MANY; |
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105 | } |
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106 | #endif |
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107 | |
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108 | the_message_queue->attribute_set = attribute_set; |
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109 | |
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110 | if (_Attributes_Is_priority( attribute_set ) ) |
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111 | the_msgq_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY; |
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112 | else |
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113 | the_msgq_attributes.discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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114 | |
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115 | if ( ! _CORE_message_queue_Initialize( |
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116 | &the_message_queue->message_queue, |
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117 | &the_msgq_attributes, |
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118 | count, |
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119 | max_message_size |
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120 | ) ) { |
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121 | #if defined(RTEMS_MULTIPROCESSING) |
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122 | if ( is_global ) |
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123 | _Objects_MP_Close( |
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124 | &_Message_queue_Information, the_message_queue->Object.id); |
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125 | #endif |
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126 | |
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127 | _Message_queue_Free( the_message_queue ); |
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128 | _Thread_Enable_dispatch(); |
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129 | return RTEMS_UNSATISFIED; |
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130 | } |
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131 | |
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132 | _Objects_Open( |
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133 | &_Message_queue_Information, |
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134 | &the_message_queue->Object, |
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135 | (Objects_Name) name |
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136 | ); |
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137 | |
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138 | *id = the_message_queue->Object.id; |
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139 | |
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140 | #if defined(RTEMS_MULTIPROCESSING) |
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141 | if ( is_global ) |
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142 | _Message_queue_MP_Send_process_packet( |
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143 | MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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144 | the_message_queue->Object.id, |
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145 | name, |
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146 | 0 |
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147 | ); |
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148 | #endif |
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149 | |
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150 | _Thread_Enable_dispatch(); |
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151 | return RTEMS_SUCCESSFUL; |
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152 | } |
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