[ac7d5ef0] | 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 | * |
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| 39 | * Output parameters: NONE |
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| 40 | */ |
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| 41 | |
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| 42 | void _Message_queue_Manager_initialization( |
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[3b438fa] | 43 | unsigned32 maximum_message_queues |
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[ac7d5ef0] | 44 | ) |
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| 45 | { |
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| 46 | _Objects_Initialize_information( |
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| 47 | &_Message_queue_Information, |
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| 48 | TRUE, |
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| 49 | maximum_message_queues, |
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| 50 | sizeof( Message_queue_Control ) |
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| 51 | ); |
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[3b438fa] | 52 | } |
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[ac7d5ef0] | 53 | |
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[3b438fa] | 54 | /*PAGE |
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| 55 | * |
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| 56 | * _Message_queue_Allocate |
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| 57 | * |
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| 58 | * Allocate a message queue and the space for its messages |
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| 59 | */ |
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[ac7d5ef0] | 60 | |
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[3b438fa] | 61 | Message_queue_Control *_Message_queue_Allocate ( |
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| 62 | unsigned32 count, |
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| 63 | unsigned32 max_message_size |
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| 64 | ) |
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| 65 | { |
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| 66 | Message_queue_Control *mq = 0; |
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| 67 | unsigned32 message_buffering_required; |
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| 68 | unsigned32 allocated_message_size; |
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| 69 | |
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| 70 | mq = (Message_queue_Control *)_Objects_Allocate(&_Message_queue_Information); |
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| 71 | if (mq == 0) |
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| 72 | goto failed; |
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| 73 | |
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| 74 | mq->maximum_message_size = max_message_size; |
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| 75 | |
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| 76 | /* |
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| 77 | * round size up to multiple of a ptr for chain init |
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| 78 | */ |
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| 79 | |
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| 80 | allocated_message_size = max_message_size; |
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| 81 | if (allocated_message_size & (sizeof(unsigned32) - 1)) |
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| 82 | { |
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| 83 | allocated_message_size += sizeof(unsigned32); |
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| 84 | allocated_message_size &= ~(sizeof(unsigned32) - 1); |
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| 85 | } |
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| 86 | |
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| 87 | message_buffering_required = count * (allocated_message_size + sizeof(Message_queue_Buffer_control)); |
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| 88 | |
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| 89 | mq->message_buffers = (Message_queue_Buffer *) _Workspace_Allocate(message_buffering_required); |
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| 90 | if (mq->message_buffers == 0) |
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| 91 | goto failed; |
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| 92 | |
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| 93 | _Chain_Initialize(&mq->Inactive_messages, |
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| 94 | mq->message_buffers, |
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| 95 | count, |
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| 96 | allocated_message_size + sizeof(Message_queue_Buffer_control)); |
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| 97 | return mq; |
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| 98 | |
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| 99 | failed: |
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| 100 | if (mq) |
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| 101 | _Message_queue_Free(mq); |
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| 102 | return (Message_queue_Control *) 0; |
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[ac7d5ef0] | 103 | } |
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| 104 | |
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| 105 | /*PAGE |
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| 106 | * |
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| 107 | * rtems_message_queue_create |
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| 108 | * |
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| 109 | * This directive creates a message queue by allocating and initializing |
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| 110 | * a message queue data structure. |
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| 111 | * |
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| 112 | * Input parameters: |
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| 113 | * name - user defined queue name |
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| 114 | * count - maximum message and reserved buffer count |
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[3b438fa] | 115 | * max_message_size - maximum size of each message |
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[ac7d5ef0] | 116 | * attribute_set - process method |
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| 117 | * id - pointer to queue |
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| 118 | * |
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| 119 | * Output parameters: |
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| 120 | * id - queue id |
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| 121 | * RTEMS_SUCCESSFUL - if successful |
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| 122 | * error code - if unsuccessful |
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| 123 | */ |
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| 124 | |
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| 125 | rtems_status_code rtems_message_queue_create( |
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| 126 | Objects_Name name, |
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| 127 | unsigned32 count, |
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[3b438fa] | 128 | unsigned32 max_message_size, |
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| 129 | rtems_attribute attribute_set, |
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[ac7d5ef0] | 130 | Objects_Id *id |
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| 131 | ) |
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| 132 | { |
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| 133 | register Message_queue_Control *the_message_queue; |
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| 134 | |
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| 135 | if ( !_Objects_Is_name_valid( name ) ) |
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| 136 | return ( RTEMS_INVALID_NAME ); |
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| 137 | |
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| 138 | if ( _Attributes_Is_global( attribute_set ) && |
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| 139 | !_Configuration_Is_multiprocessing() ) |
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| 140 | return( RTEMS_MP_NOT_CONFIGURED ); |
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| 141 | |
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[3b438fa] | 142 | if (count == 0) |
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| 143 | return RTEMS_INVALID_NUMBER; |
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| 144 | |
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| 145 | if (max_message_size == 0) |
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| 146 | return RTEMS_INVALID_SIZE; |
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| 147 | |
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| 148 | #if 1 |
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| 149 | /* |
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| 150 | * I am not 100% sure this should be an error. |
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| 151 | * It seems reasonable to create a que with a large max size, |
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| 152 | * and then just send smaller msgs from remote (or all) nodes. |
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| 153 | */ |
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| 154 | |
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| 155 | if ( _Attributes_Is_global( attribute_set ) && |
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| 156 | _Configuration_MPCI_table && |
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| 157 | (_Configuration_MPCI_table->maximum_packet_size < max_message_size)) |
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| 158 | { |
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| 159 | return RTEMS_INVALID_SIZE; |
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| 160 | } |
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| 161 | #endif |
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| 162 | |
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[ac7d5ef0] | 163 | _Thread_Disable_dispatch(); /* protects object pointer */ |
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| 164 | |
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[3b438fa] | 165 | the_message_queue = _Message_queue_Allocate(count, max_message_size); |
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[ac7d5ef0] | 166 | |
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| 167 | if ( !the_message_queue ) { |
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| 168 | _Thread_Enable_dispatch(); |
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| 169 | return( RTEMS_TOO_MANY ); |
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| 170 | } |
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| 171 | |
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| 172 | if ( _Attributes_Is_global( attribute_set ) && |
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| 173 | !( _Objects_MP_Open( &_Message_queue_Information, name, |
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| 174 | the_message_queue->Object.id, FALSE ) ) ) { |
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| 175 | _Message_queue_Free( the_message_queue ); |
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| 176 | _Thread_Enable_dispatch(); |
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[3b438fa] | 177 | return RTEMS_TOO_MANY; |
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[ac7d5ef0] | 178 | } |
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| 179 | |
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[3b438fa] | 180 | the_message_queue->maximum_pending_messages = count; |
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[ac7d5ef0] | 181 | |
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[3b438fa] | 182 | the_message_queue->attribute_set = attribute_set; |
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[ac7d5ef0] | 183 | the_message_queue->number_of_pending_messages = 0; |
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| 184 | |
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| 185 | _Chain_Initialize_empty( &the_message_queue->Pending_messages ); |
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| 186 | |
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| 187 | _Thread_queue_Initialize( &the_message_queue->Wait_queue, attribute_set, |
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| 188 | STATES_WAITING_FOR_MESSAGE ); |
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| 189 | |
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| 190 | _Objects_Open( &_Message_queue_Information, |
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| 191 | &the_message_queue->Object, name ); |
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| 192 | |
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| 193 | *id = the_message_queue->Object.id; |
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| 194 | |
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| 195 | if ( _Attributes_Is_global( attribute_set ) ) |
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| 196 | _Message_queue_MP_Send_process_packet( |
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| 197 | MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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| 198 | the_message_queue->Object.id, |
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| 199 | name, |
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| 200 | 0 |
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| 201 | ); |
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| 202 | |
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| 203 | _Thread_Enable_dispatch(); |
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| 204 | return( RTEMS_SUCCESSFUL ); |
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| 205 | } |
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| 206 | |
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| 207 | /*PAGE |
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| 208 | * |
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| 209 | * rtems_message_queue_ident |
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| 210 | * |
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| 211 | * This directive returns the system ID associated with |
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| 212 | * the message queue name. |
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| 213 | * |
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| 214 | * Input parameters: |
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| 215 | * name - user defined message queue name |
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| 216 | * node - node(s) to be searched |
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| 217 | * id - pointer to message queue id |
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| 218 | * |
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| 219 | * Output parameters: |
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| 220 | * *id - message queue id |
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| 221 | * RTEMS_SUCCESSFUL - if successful |
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| 222 | * error code - if unsuccessful |
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| 223 | */ |
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| 224 | |
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| 225 | rtems_status_code rtems_message_queue_ident( |
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| 226 | Objects_Name name, |
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| 227 | unsigned32 node, |
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| 228 | Objects_Id *id |
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| 229 | ) |
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| 230 | { |
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| 231 | return( _Objects_Name_to_id( &_Message_queue_Information, name, |
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| 232 | node, id ) ); |
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| 233 | } |
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| 234 | |
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| 235 | /*PAGE |
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| 236 | * |
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| 237 | * rtems_message_queue_delete |
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| 238 | * |
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| 239 | * This directive allows a thread to delete the message queue specified |
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| 240 | * by the given queue identifier. |
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| 241 | * |
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| 242 | * Input parameters: |
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| 243 | * id - queue id |
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| 244 | * |
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| 245 | * Output parameters: |
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| 246 | * RTEMS_SUCCESSFUL - if successful |
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| 247 | * error code - if unsuccessful |
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| 248 | */ |
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| 249 | |
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| 250 | rtems_status_code rtems_message_queue_delete( |
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| 251 | Objects_Id id |
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| 252 | ) |
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| 253 | { |
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| 254 | register Message_queue_Control *the_message_queue; |
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| 255 | Objects_Locations location; |
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| 256 | |
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| 257 | the_message_queue = _Message_queue_Get( id, &location ); |
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| 258 | switch ( location ) { |
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| 259 | case OBJECTS_ERROR: |
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| 260 | return( RTEMS_INVALID_ID ); |
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| 261 | case OBJECTS_REMOTE: |
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| 262 | _Thread_Dispatch(); |
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| 263 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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| 264 | case OBJECTS_LOCAL: |
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| 265 | _Objects_Close( &_Message_queue_Information, |
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| 266 | &the_message_queue->Object ); |
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| 267 | |
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| 268 | if ( the_message_queue->number_of_pending_messages != 0 ) |
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| 269 | (void) _Message_queue_Flush_support( the_message_queue ); |
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| 270 | else |
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| 271 | _Thread_queue_Flush( |
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| 272 | &the_message_queue->Wait_queue, |
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| 273 | _Message_queue_MP_Send_object_was_deleted |
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| 274 | ); |
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| 275 | |
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| 276 | _Message_queue_Free( the_message_queue ); |
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| 277 | |
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| 278 | if ( _Attributes_Is_global( the_message_queue->attribute_set ) ) { |
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| 279 | _Objects_MP_Close( |
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| 280 | &_Message_queue_Information, |
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| 281 | the_message_queue->Object.id |
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| 282 | ); |
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| 283 | |
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| 284 | _Message_queue_MP_Send_process_packet( |
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| 285 | MESSAGE_QUEUE_MP_ANNOUNCE_DELETE, |
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| 286 | the_message_queue->Object.id, |
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| 287 | 0, /* Not used */ |
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| 288 | MPCI_DEFAULT_TIMEOUT |
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| 289 | ); |
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| 290 | } |
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| 291 | |
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| 292 | _Thread_Enable_dispatch(); |
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| 293 | return( RTEMS_SUCCESSFUL ); |
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| 294 | } |
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| 295 | |
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| 296 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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| 297 | } |
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| 298 | |
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| 299 | /*PAGE |
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| 300 | * |
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| 301 | * rtems_message_queue_send |
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| 302 | * |
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| 303 | * This routine implements the directives q_send. It sends a |
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| 304 | * message to the specified message queue. |
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| 305 | * |
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| 306 | * Input parameters: |
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| 307 | * id - pointer to message queue |
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| 308 | * buffer - pointer to message buffer |
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| 309 | * |
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| 310 | * Output parameters: |
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| 311 | * RTEMS_SUCCESSFUL - if successful |
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| 312 | * error code - if unsuccessful |
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| 313 | */ |
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| 314 | |
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| 315 | rtems_status_code rtems_message_queue_send( |
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| 316 | Objects_Id id, |
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[3b438fa] | 317 | void *buffer, |
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| 318 | unsigned32 size |
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[ac7d5ef0] | 319 | ) |
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| 320 | { |
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[3b438fa] | 321 | return _Message_queue_Submit(id, buffer, size, MESSAGE_QUEUE_SEND_REQUEST); |
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[ac7d5ef0] | 322 | } |
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| 323 | |
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| 324 | /*PAGE |
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| 325 | * |
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| 326 | * rtems_message_queue_urgent |
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| 327 | * |
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| 328 | * This routine implements the directives q_urgent. It urgents a |
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| 329 | * message to the specified message queue. |
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| 330 | * |
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| 331 | * Input parameters: |
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| 332 | * id - pointer to message queue |
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| 333 | * buffer - pointer to message buffer |
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| 334 | * |
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| 335 | * Output parameters: |
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| 336 | * RTEMS_SUCCESSFUL - if successful |
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| 337 | * error code - if unsuccessful |
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| 338 | */ |
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| 339 | |
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| 340 | rtems_status_code rtems_message_queue_urgent( |
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| 341 | Objects_Id id, |
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[3b438fa] | 342 | void *buffer, |
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| 343 | unsigned32 size |
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[ac7d5ef0] | 344 | ) |
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| 345 | { |
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[3b438fa] | 346 | return _Message_queue_Submit(id, buffer, size, MESSAGE_QUEUE_URGENT_REQUEST); |
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[ac7d5ef0] | 347 | } |
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| 348 | |
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| 349 | /*PAGE |
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| 350 | * |
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| 351 | * rtems_message_queue_broadcast |
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| 352 | * |
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| 353 | * This directive sends a message for every thread waiting on the queue |
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| 354 | * designated by id. |
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| 355 | * |
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| 356 | * Input parameters: |
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| 357 | * id - pointer to message queue |
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| 358 | * buffer - pointer to message buffer |
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| 359 | * count - pointer to area to store number of threads made ready |
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| 360 | * |
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| 361 | * Output parameters: |
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| 362 | * count - number of threads made ready |
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| 363 | * RTEMS_SUCCESSFUL - if successful |
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| 364 | * error code - if unsuccessful |
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| 365 | */ |
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| 366 | |
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| 367 | rtems_status_code rtems_message_queue_broadcast( |
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| 368 | Objects_Id id, |
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| 369 | void *buffer, |
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[3b438fa] | 370 | unsigned32 size, |
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[ac7d5ef0] | 371 | unsigned32 *count |
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| 372 | ) |
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| 373 | { |
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| 374 | register Message_queue_Control *the_message_queue; |
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| 375 | Objects_Locations location; |
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| 376 | Thread_Control *the_thread; |
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| 377 | unsigned32 number_broadcasted; |
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| 378 | |
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| 379 | the_message_queue = _Message_queue_Get( id, &location ); |
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| 380 | switch ( location ) { |
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| 381 | case OBJECTS_ERROR: |
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| 382 | return( RTEMS_INVALID_ID ); |
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| 383 | case OBJECTS_REMOTE: |
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| 384 | _Thread_Executing->Wait.return_argument = count; |
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| 385 | |
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| 386 | return |
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| 387 | _Message_queue_MP_Send_request_packet( |
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| 388 | MESSAGE_QUEUE_MP_BROADCAST_REQUEST, |
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| 389 | id, |
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[3b438fa] | 390 | buffer, |
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| 391 | &size, |
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| 392 | 0, /* option_set not used */ |
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[ac7d5ef0] | 393 | MPCI_DEFAULT_TIMEOUT |
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| 394 | ); |
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| 395 | |
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| 396 | case OBJECTS_LOCAL: |
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[3b438fa] | 397 | { |
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| 398 | Thread_Wait_information *waitp; |
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| 399 | unsigned32 constrained_size; |
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| 400 | |
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[ac7d5ef0] | 401 | number_broadcasted = 0; |
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| 402 | while ( (the_thread = |
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| 403 | _Thread_queue_Dequeue(&the_message_queue->Wait_queue)) ) { |
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[3b438fa] | 404 | waitp = &the_thread->Wait; |
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[ac7d5ef0] | 405 | number_broadcasted += 1; |
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| 406 | |
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[3b438fa] | 407 | constrained_size = size; |
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| 408 | if (size > the_message_queue->maximum_message_size) |
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| 409 | constrained_size = the_message_queue->maximum_message_size; |
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| 410 | |
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| 411 | _Message_queue_Copy_buffer(buffer, |
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| 412 | waitp->return_argument, |
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| 413 | constrained_size); |
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| 414 | |
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| 415 | *waitp->Extra.message_size_p = constrained_size; |
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| 416 | |
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[ac7d5ef0] | 417 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) { |
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| 418 | the_thread->receive_packet->return_code = RTEMS_SUCCESSFUL; |
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| 419 | |
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| 420 | _Message_queue_MP_Send_response_packet( |
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| 421 | MESSAGE_QUEUE_MP_RECEIVE_RESPONSE, |
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| 422 | id, |
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| 423 | the_thread |
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| 424 | ); |
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| 425 | } |
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| 426 | } |
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| 427 | _Thread_Enable_dispatch(); |
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| 428 | *count = number_broadcasted; |
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| 429 | return( RTEMS_SUCCESSFUL ); |
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[3b438fa] | 430 | } |
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[ac7d5ef0] | 431 | |
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[3b438fa] | 432 | default: |
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| 433 | return RTEMS_INTERNAL_ERROR; |
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| 434 | } |
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[ac7d5ef0] | 435 | } |
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| 436 | |
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| 437 | /*PAGE |
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| 438 | * |
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| 439 | * rtems_message_queue_receive |
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| 440 | * |
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| 441 | * This directive dequeues a message from the designated message queue |
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| 442 | * and copies it into the requesting thread's buffer. |
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| 443 | * |
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| 444 | * Input parameters: |
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| 445 | * id - queue id |
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| 446 | * buffer - pointer to message buffer |
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| 447 | * option_set - options on receive |
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| 448 | * timeout - number of ticks to wait |
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| 449 | * |
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| 450 | * Output parameters: |
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| 451 | * RTEMS_SUCCESSFUL - if successful |
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| 452 | * error code - if unsuccessful |
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| 453 | */ |
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| 454 | |
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| 455 | rtems_status_code rtems_message_queue_receive( |
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| 456 | Objects_Id id, |
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| 457 | void *buffer, |
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[3b438fa] | 458 | unsigned32 *size_p, |
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[ac7d5ef0] | 459 | unsigned32 option_set, |
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[3b438fa] | 460 | rtems_interval timeout |
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[ac7d5ef0] | 461 | ) |
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| 462 | { |
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| 463 | register Message_queue_Control *the_message_queue; |
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[3b438fa] | 464 | Objects_Locations location; |
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[ac7d5ef0] | 465 | |
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| 466 | the_message_queue = _Message_queue_Get( id, &location ); |
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| 467 | switch ( location ) { |
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[3b438fa] | 468 | |
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[ac7d5ef0] | 469 | case OBJECTS_ERROR: |
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| 470 | return( RTEMS_INVALID_ID ); |
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[3b438fa] | 471 | |
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[ac7d5ef0] | 472 | case OBJECTS_REMOTE: |
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| 473 | _Thread_Executing->Wait.return_argument = buffer; |
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[3b438fa] | 474 | |
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| 475 | return _Message_queue_MP_Send_request_packet( |
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[ac7d5ef0] | 476 | MESSAGE_QUEUE_MP_RECEIVE_REQUEST, |
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| 477 | id, |
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| 478 | buffer, |
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[3b438fa] | 479 | size_p, |
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[ac7d5ef0] | 480 | option_set, |
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| 481 | timeout |
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| 482 | ); |
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| 483 | |
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| 484 | case OBJECTS_LOCAL: |
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[3b438fa] | 485 | if ( ! _Message_queue_Seize(the_message_queue, |
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| 486 | option_set, |
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| 487 | buffer, |
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| 488 | size_p)) |
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| 489 | { |
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[ac7d5ef0] | 490 | _Thread_queue_Enqueue( &the_message_queue->Wait_queue, timeout ); |
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[3b438fa] | 491 | } |
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[ac7d5ef0] | 492 | _Thread_Enable_dispatch(); |
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[3b438fa] | 493 | return _Thread_Executing->Wait.return_code; |
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[ac7d5ef0] | 494 | } |
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| 495 | |
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| 496 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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| 497 | } |
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| 498 | |
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| 499 | /*PAGE |
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| 500 | * |
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| 501 | * rtems_message_queue_flush |
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| 502 | * |
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| 503 | * This directive removes all pending messages from a queue and returns |
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| 504 | * the number of messages removed. If no messages were present then |
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| 505 | * a count of zero is returned. |
---|
| 506 | * |
---|
| 507 | * Input parameters: |
---|
| 508 | * id - queue id |
---|
| 509 | * count - return area for count |
---|
| 510 | * |
---|
| 511 | * Output parameters: |
---|
| 512 | * count - number of messages removed ( 0 = empty queue ) |
---|
| 513 | * RTEMS_SUCCESSFUL - if successful |
---|
| 514 | * error code - if unsuccessful |
---|
| 515 | */ |
---|
| 516 | |
---|
| 517 | rtems_status_code rtems_message_queue_flush( |
---|
| 518 | Objects_Id id, |
---|
| 519 | unsigned32 *count |
---|
| 520 | ) |
---|
| 521 | { |
---|
| 522 | register Message_queue_Control *the_message_queue; |
---|
| 523 | Objects_Locations location; |
---|
| 524 | |
---|
| 525 | the_message_queue = _Message_queue_Get( id, &location ); |
---|
| 526 | switch ( location ) { |
---|
| 527 | case OBJECTS_ERROR: |
---|
| 528 | return( RTEMS_INVALID_ID ); |
---|
| 529 | case OBJECTS_REMOTE: |
---|
| 530 | _Thread_Executing->Wait.return_argument = count; |
---|
| 531 | |
---|
| 532 | return |
---|
| 533 | _Message_queue_MP_Send_request_packet( |
---|
| 534 | MESSAGE_QUEUE_MP_FLUSH_REQUEST, |
---|
| 535 | id, |
---|
[3b438fa] | 536 | 0, /* buffer not used */ |
---|
| 537 | 0, /* size_p */ |
---|
| 538 | 0, /* option_set not used */ |
---|
[ac7d5ef0] | 539 | MPCI_DEFAULT_TIMEOUT |
---|
| 540 | ); |
---|
| 541 | |
---|
| 542 | case OBJECTS_LOCAL: |
---|
| 543 | if ( the_message_queue->number_of_pending_messages != 0 ) |
---|
| 544 | *count = _Message_queue_Flush_support( the_message_queue ); |
---|
| 545 | else |
---|
| 546 | *count = 0; |
---|
| 547 | _Thread_Enable_dispatch(); |
---|
| 548 | return( RTEMS_SUCCESSFUL ); |
---|
| 549 | } |
---|
| 550 | |
---|
| 551 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
---|
| 552 | } |
---|
| 553 | |
---|
| 554 | /*PAGE |
---|
| 555 | * |
---|
| 556 | * _Message_queue_Seize |
---|
| 557 | * |
---|
| 558 | * This kernel routine dequeues a message, copies the message buffer to |
---|
| 559 | * a given destination buffer, and frees the message buffer to the |
---|
| 560 | * inactive message pool. |
---|
| 561 | * |
---|
| 562 | * Input parameters: |
---|
| 563 | * the_message_queue - pointer to message queue |
---|
| 564 | * option_set - options on receive |
---|
| 565 | * the_buffer - pointer to message buffer to be filled |
---|
| 566 | * |
---|
| 567 | * Output parameters: |
---|
| 568 | * TRUE - if message received or RTEMS_NO_WAIT and no message |
---|
| 569 | * FALSE - if thread is to block |
---|
| 570 | * |
---|
| 571 | * NOTE: Dependent on BUFFER_LENGTH |
---|
| 572 | * |
---|
| 573 | * INTERRUPT LATENCY: |
---|
| 574 | * available |
---|
| 575 | * wait |
---|
| 576 | */ |
---|
| 577 | |
---|
| 578 | boolean _Message_queue_Seize( |
---|
| 579 | Message_queue_Control *the_message_queue, |
---|
| 580 | rtems_option option_set, |
---|
[3b438fa] | 581 | void *buffer, |
---|
| 582 | unsigned32 *size_p |
---|
[ac7d5ef0] | 583 | ) |
---|
| 584 | { |
---|
| 585 | ISR_Level level; |
---|
| 586 | Message_queue_Buffer_control *the_message; |
---|
| 587 | Thread_Control *executing; |
---|
| 588 | |
---|
| 589 | executing = _Thread_Executing; |
---|
| 590 | executing->Wait.return_code = RTEMS_SUCCESSFUL; |
---|
| 591 | _ISR_Disable( level ); |
---|
| 592 | if ( the_message_queue->number_of_pending_messages != 0 ) { |
---|
| 593 | the_message_queue->number_of_pending_messages -= 1; |
---|
| 594 | |
---|
| 595 | the_message = _Message_queue_Get_pending_message( the_message_queue ); |
---|
| 596 | _ISR_Enable( level ); |
---|
[3b438fa] | 597 | *size_p = the_message->Contents.size; |
---|
| 598 | _Message_queue_Copy_buffer( the_message->Contents.buffer, buffer, *size_p ); |
---|
| 599 | _Message_queue_Free_message_buffer(the_message_queue, the_message ); |
---|
[ac7d5ef0] | 600 | return( TRUE ); |
---|
| 601 | } |
---|
| 602 | |
---|
| 603 | if ( _Options_Is_no_wait( option_set ) ) { |
---|
| 604 | _ISR_Enable( level ); |
---|
| 605 | executing->Wait.return_code = RTEMS_UNSATISFIED; |
---|
| 606 | return( TRUE ); |
---|
| 607 | } |
---|
| 608 | |
---|
| 609 | the_message_queue->Wait_queue.sync = TRUE; |
---|
| 610 | executing->Wait.queue = &the_message_queue->Wait_queue; |
---|
| 611 | executing->Wait.id = the_message_queue->Object.id; |
---|
| 612 | executing->Wait.option_set = option_set; |
---|
| 613 | executing->Wait.return_argument = (unsigned32 *)buffer; |
---|
[3b438fa] | 614 | executing->Wait.Extra.message_size_p = size_p; |
---|
[ac7d5ef0] | 615 | _ISR_Enable( level ); |
---|
[3b438fa] | 616 | return FALSE; |
---|
[ac7d5ef0] | 617 | } |
---|
| 618 | |
---|
| 619 | /*PAGE |
---|
| 620 | * |
---|
| 621 | * _Message_queue_Flush_support |
---|
| 622 | * |
---|
| 623 | * This message manager routine removes all messages from a message queue |
---|
| 624 | * and returns them to the inactive message pool. |
---|
| 625 | * |
---|
| 626 | * Input parameters: |
---|
| 627 | * the_message_queue - pointer to message queue |
---|
| 628 | * |
---|
| 629 | * Output parameters: |
---|
| 630 | * returns - number of messages placed on inactive chain |
---|
| 631 | * |
---|
| 632 | * INTERRUPT LATENCY: |
---|
| 633 | * only case |
---|
| 634 | */ |
---|
| 635 | |
---|
| 636 | unsigned32 _Message_queue_Flush_support( |
---|
| 637 | Message_queue_Control *the_message_queue |
---|
| 638 | ) |
---|
| 639 | { |
---|
[3b438fa] | 640 | ISR_Level level; |
---|
[ac7d5ef0] | 641 | Chain_Node *inactive_first; |
---|
| 642 | Chain_Node *message_queue_first; |
---|
| 643 | Chain_Node *message_queue_last; |
---|
[3b438fa] | 644 | unsigned32 count; |
---|
[ac7d5ef0] | 645 | |
---|
| 646 | _ISR_Disable( level ); |
---|
[3b438fa] | 647 | inactive_first = the_message_queue->Inactive_messages.first; |
---|
[ac7d5ef0] | 648 | message_queue_first = the_message_queue->Pending_messages.first; |
---|
| 649 | message_queue_last = the_message_queue->Pending_messages.last; |
---|
| 650 | |
---|
[3b438fa] | 651 | the_message_queue->Inactive_messages.first = message_queue_first; |
---|
| 652 | message_queue_last->next = inactive_first; |
---|
| 653 | inactive_first->previous = message_queue_last; |
---|
[ac7d5ef0] | 654 | message_queue_first->previous = |
---|
[3b438fa] | 655 | _Chain_Head( &the_message_queue->Inactive_messages ); |
---|
[ac7d5ef0] | 656 | |
---|
| 657 | _Chain_Initialize_empty( &the_message_queue->Pending_messages ); |
---|
| 658 | |
---|
| 659 | count = the_message_queue->number_of_pending_messages; |
---|
| 660 | the_message_queue->number_of_pending_messages = 0; |
---|
| 661 | _ISR_Enable( level ); |
---|
[3b438fa] | 662 | return count; |
---|
[ac7d5ef0] | 663 | } |
---|
| 664 | |
---|
| 665 | /*PAGE |
---|
| 666 | * |
---|
| 667 | * _Message_queue_Submit |
---|
| 668 | * |
---|
| 669 | * This routine implements the directives q_send and q_urgent. It |
---|
| 670 | * processes a message that is to be submitted to the designated |
---|
| 671 | * message queue. The message will either be processed as a send |
---|
| 672 | * send message which it will be inserted at the rear of the queue |
---|
| 673 | * or it will be processed as an urgent message which will be inserted |
---|
| 674 | * at the front of the queue. |
---|
| 675 | * |
---|
| 676 | * Input parameters: |
---|
| 677 | * id - pointer to message queue |
---|
[3b438fa] | 678 | * buffer - pointer to message buffer |
---|
| 679 | * size - size in bytes of message to send |
---|
[ac7d5ef0] | 680 | * submit_type - send or urgent message |
---|
| 681 | * |
---|
| 682 | * Output parameters: |
---|
| 683 | * RTEMS_SUCCESSFUL - if successful |
---|
[3b438fa] | 684 | * error code - if unsuccessful |
---|
[ac7d5ef0] | 685 | */ |
---|
| 686 | |
---|
| 687 | rtems_status_code _Message_queue_Submit( |
---|
| 688 | Objects_Id id, |
---|
[3b438fa] | 689 | void *buffer, |
---|
| 690 | unsigned32 size, |
---|
[ac7d5ef0] | 691 | Message_queue_Submit_types submit_type |
---|
| 692 | ) |
---|
| 693 | { |
---|
| 694 | register Message_queue_Control *the_message_queue; |
---|
| 695 | Objects_Locations location; |
---|
| 696 | Thread_Control *the_thread; |
---|
| 697 | Message_queue_Buffer_control *the_message; |
---|
| 698 | |
---|
| 699 | the_message_queue = _Message_queue_Get( id, &location ); |
---|
[3b438fa] | 700 | switch ( location ) |
---|
| 701 | { |
---|
[ac7d5ef0] | 702 | case OBJECTS_ERROR: |
---|
| 703 | return( RTEMS_INVALID_ID ); |
---|
[3b438fa] | 704 | |
---|
[ac7d5ef0] | 705 | case OBJECTS_REMOTE: |
---|
| 706 | switch ( submit_type ) { |
---|
| 707 | case MESSAGE_QUEUE_SEND_REQUEST: |
---|
| 708 | return |
---|
| 709 | _Message_queue_MP_Send_request_packet( |
---|
| 710 | MESSAGE_QUEUE_MP_SEND_REQUEST, |
---|
| 711 | id, |
---|
| 712 | buffer, |
---|
[3b438fa] | 713 | &size, |
---|
| 714 | 0, /* option_set */ |
---|
[ac7d5ef0] | 715 | MPCI_DEFAULT_TIMEOUT |
---|
| 716 | ); |
---|
| 717 | |
---|
| 718 | case MESSAGE_QUEUE_URGENT_REQUEST: |
---|
| 719 | return |
---|
| 720 | _Message_queue_MP_Send_request_packet( |
---|
| 721 | MESSAGE_QUEUE_MP_URGENT_REQUEST, |
---|
| 722 | id, |
---|
| 723 | buffer, |
---|
[3b438fa] | 724 | &size, |
---|
| 725 | 0, /* option_set */ |
---|
[ac7d5ef0] | 726 | MPCI_DEFAULT_TIMEOUT |
---|
| 727 | ); |
---|
| 728 | } |
---|
| 729 | |
---|
[3b438fa] | 730 | case OBJECTS_LOCAL: |
---|
| 731 | if (size > the_message_queue->maximum_message_size) |
---|
| 732 | { |
---|
| 733 | _Thread_Enable_dispatch(); |
---|
| 734 | return RTEMS_INVALID_SIZE; |
---|
| 735 | } |
---|
[ac7d5ef0] | 736 | |
---|
[3b438fa] | 737 | /* |
---|
| 738 | * Is there a thread currently waiting on this message queue? |
---|
| 739 | */ |
---|
| 740 | |
---|
| 741 | the_thread = _Thread_queue_Dequeue( &the_message_queue->Wait_queue ); |
---|
| 742 | if ( the_thread ) |
---|
| 743 | { |
---|
[ac7d5ef0] | 744 | _Message_queue_Copy_buffer( |
---|
| 745 | buffer, |
---|
[3b438fa] | 746 | the_thread->Wait.return_argument, |
---|
| 747 | size |
---|
[ac7d5ef0] | 748 | ); |
---|
[3b438fa] | 749 | *the_thread->Wait.Extra.message_size_p = size; |
---|
| 750 | |
---|
[ac7d5ef0] | 751 | if ( !_Objects_Is_local_id( the_thread->Object.id ) ) { |
---|
| 752 | the_thread->receive_packet->return_code = RTEMS_SUCCESSFUL; |
---|
| 753 | |
---|
| 754 | _Message_queue_MP_Send_response_packet( |
---|
| 755 | MESSAGE_QUEUE_MP_RECEIVE_RESPONSE, |
---|
| 756 | id, |
---|
| 757 | the_thread |
---|
| 758 | ); |
---|
| 759 | |
---|
| 760 | } |
---|
| 761 | _Thread_Enable_dispatch(); |
---|
| 762 | return( RTEMS_SUCCESSFUL ); |
---|
| 763 | } |
---|
| 764 | |
---|
[3b438fa] | 765 | /* |
---|
| 766 | * No one waiting on this one currently. |
---|
| 767 | * Allocate a message buffer and store it away |
---|
| 768 | */ |
---|
| 769 | |
---|
[ac7d5ef0] | 770 | if ( the_message_queue->number_of_pending_messages == |
---|
| 771 | the_message_queue->maximum_pending_messages ) { |
---|
| 772 | _Thread_Enable_dispatch(); |
---|
| 773 | return( RTEMS_TOO_MANY ); |
---|
| 774 | } |
---|
| 775 | |
---|
[3b438fa] | 776 | the_message = _Message_queue_Allocate_message_buffer(the_message_queue); |
---|
| 777 | if ( the_message == 0) { |
---|
[ac7d5ef0] | 778 | _Thread_Enable_dispatch(); |
---|
| 779 | return( RTEMS_UNSATISFIED ); |
---|
| 780 | } |
---|
| 781 | |
---|
[3b438fa] | 782 | _Message_queue_Copy_buffer( buffer, the_message->Contents.buffer, size ); |
---|
| 783 | the_message->Contents.size = size; |
---|
| 784 | |
---|
[ac7d5ef0] | 785 | the_message_queue->number_of_pending_messages += 1; |
---|
| 786 | |
---|
| 787 | switch ( submit_type ) { |
---|
| 788 | case MESSAGE_QUEUE_SEND_REQUEST: |
---|
| 789 | _Message_queue_Append( the_message_queue, the_message ); |
---|
| 790 | break; |
---|
| 791 | case MESSAGE_QUEUE_URGENT_REQUEST: |
---|
| 792 | _Message_queue_Prepend( the_message_queue, the_message ); |
---|
| 793 | break; |
---|
| 794 | } |
---|
| 795 | |
---|
| 796 | _Thread_Enable_dispatch(); |
---|
| 797 | return( RTEMS_SUCCESSFUL ); |
---|
[3b438fa] | 798 | |
---|
| 799 | default: |
---|
| 800 | return RTEMS_INTERNAL_ERROR; /* And they were such nice boys, too! */ |
---|
[ac7d5ef0] | 801 | } |
---|
| 802 | } |
---|