version 1.1, 2001/07/08 16:28:53
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version 1.43, 2005/05/04 12:44:03
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//%///////////////////////////////////////////////////////////////////////////// |
//%2005//////////////////////////////////////////////////////////////////////// |
// | // |
// Copyright (c) 2000, 2001 The Open group, BMC Software, Tivoli Systems, IBM |
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development |
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// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems. |
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// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.; |
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// IBM Corp.; EMC Corporation, The Open Group. |
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// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.; |
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// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group. |
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// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.; |
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// EMC Corporation; VERITAS Software Corporation; The Open Group. |
// | // |
// Permission is hereby granted, free of charge, to any person obtaining a copy | // Permission is hereby granted, free of charge, to any person obtaining a copy |
// of this software and associated documentation files (the "Software"), to | // of this software and associated documentation files (the "Software"), to |
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// | // |
// Author: Mike Brasher (mbrasher@bmc.com) | // Author: Mike Brasher (mbrasher@bmc.com) |
// | // |
// Modified By: |
// Modified By: Amit K Arora, IBM (amita@in.ibm.com) for Bug#1090 |
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// Josephine Eskaline Joyce, IBM (jojustin@in.ibm.com) for Bug#2076 |
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// David Dillard, VERITAS Software Corp. |
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// (david.dillard@veritas.com) |
// | // |
//%///////////////////////////////////////////////////////////////////////////// | //%///////////////////////////////////////////////////////////////////////////// |
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#include <Pegasus/Common/HashTable.h> |
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#include <Pegasus/Common/IPC.h> |
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#include <Pegasus/Common/Tracer.h> |
#include "MessageQueue.h" | #include "MessageQueue.h" |
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#include "MessageQueueService.h" |
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PEGASUS_USING_STD; |
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PEGASUS_NAMESPACE_BEGIN | PEGASUS_NAMESPACE_BEGIN |
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typedef HashTable<Uint32, MessageQueue*, EqualFunc<Uint32>, HashFunc<Uint32> > |
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QueueTable; |
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static QueueTable _queueTable(256); |
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static Mutex q_table_mut ; |
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void MessageQueue::remove_myself(Uint32 qid) |
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{ |
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AutoMutex autoMut(q_table_mut); |
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_queueTable.remove(qid); |
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} |
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Uint32 MessageQueue::getNextQueueId() |
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{ |
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static Uint32 _nextQueueId = 2; |
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// |
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// Lock mutex: |
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// |
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static Mutex _id_mut ; |
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AutoMutex autoMut(_id_mut); |
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Uint32 queueId; |
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// Assign the next queue ID that is not already in use |
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do |
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{ |
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// Handle wrap around and never assign zero or one as a queue id: |
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if (_nextQueueId == 0) |
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{ |
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_nextQueueId = 2; |
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} |
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queueId = _nextQueueId++; |
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} while (lookup(queueId) != 0); |
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return queueId; |
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} |
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MessageQueue::MessageQueue( |
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const char* name, |
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Boolean async, |
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Uint32 queueId) |
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: _queueId(queueId), _capabilities(0), _count(0), _front(0), _back(0), _async(async) |
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{ |
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// |
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// Copy the name: |
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// |
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PEG_METHOD_ENTER(TRC_MESSAGEQUEUESERVICE,"MessageQueue::MessageQueue()"); |
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if (!name) |
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name = ""; |
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_name = new char[strlen(name) + 1]; |
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strcpy(_name, name); |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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"MessageQueue::MessageQueue name = %s, queueId = %u", name, queueId); |
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// |
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// Insert into queue table: |
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// |
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AutoMutex autoMut(q_table_mut); |
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while (!_queueTable.insert(_queueId, this)) |
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; |
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PEG_METHOD_EXIT(); |
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} |
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MessageQueue::~MessageQueue() |
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{ |
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// ATTN-A: thread safety! |
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PEG_METHOD_ENTER(TRC_MESSAGEQUEUESERVICE,"MessageQueue::~MessageQueue()"); |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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"MessageQueue::~MessageQueue queueId = %i, name = %s", _queueId, _name); |
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{ |
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AutoMutex autoMut(q_table_mut); |
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_queueTable.remove(_queueId); |
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} // mutex unlocks here |
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// Free the name: |
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delete [] _name; |
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while(_front) |
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{ |
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Message* tmp = _front; |
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_front = _front->_next; |
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delete tmp; |
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} |
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PEG_METHOD_EXIT(); |
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} |
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void MessageQueue::enqueue(Message* message) |
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{ |
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PEG_METHOD_ENTER(TRC_MESSAGEQUEUESERVICE,"MessageQueue::enqueue()"); |
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if (!message) |
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{ |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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"MessageQueue::enqueue failure"); |
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PEG_METHOD_EXIT(); |
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throw NullPointer(); |
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} |
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PEG_TRACE_STRING( TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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String("Queue name: ") + getQueueName() ) ; |
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Tracer::trace ( TRC_MESSAGEQUEUESERVICE, |
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Tracer::LEVEL3, |
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"Message: [%s, %d]", |
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MessageTypeToString(message->getType()), |
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message->getKey() ); |
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{ |
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AutoMutex autoMut(_mut); |
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if (_back) |
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{ |
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_back->_next = message; |
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message->_prev = _back; |
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message->_next = 0; |
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_back = message; |
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} |
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else |
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{ |
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_front = message; |
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_back = message; |
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message->_prev = 0; |
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message->_next = 0; |
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} |
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message->_owner = this; |
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_count++; |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL4, |
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"MessageQueue::enqueue _queueId = %d, _count = %d", _queueId, _count); |
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} // mutex unlocks here |
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handleEnqueue(); |
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PEG_METHOD_EXIT(); |
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} |
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Message* MessageQueue::dequeue() |
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{ |
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PEG_METHOD_ENTER(TRC_MESSAGEQUEUESERVICE,"MessageQueue::dequeue()"); |
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AutoMutex autoMut(_mut); |
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if (_front) |
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{ |
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Message* message = _front; |
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_front = _front->_next; |
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if (_front) |
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_front->_prev = 0; |
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if (_back == message) |
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_back = 0; |
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_count--; |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL4, |
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"MessageQueue::dequeue _queueId = %d, _count = %d", |
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_queueId, _count); |
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message->_next = 0; |
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message->_prev = 0; |
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message->_owner = 0; |
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PEG_METHOD_EXIT(); |
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return message; |
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} |
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PEG_METHOD_EXIT(); |
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return 0; |
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} |
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void MessageQueue::remove(Message* message) |
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{ |
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PEG_METHOD_ENTER(TRC_MESSAGEQUEUESERVICE,"MessageQueue::remove()"); |
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if (!message) |
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{ |
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PEG_METHOD_EXIT(); |
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throw NullPointer(); |
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} |
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if (message->_owner != this) |
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{ |
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PEG_METHOD_EXIT(); |
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throw NoSuchMessageOnQueue(); |
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} |
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{ |
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AutoMutex autoMut(_mut); |
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if (message->_next) |
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message->_next->_prev = message->_prev; |
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else |
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_back = message->_prev; |
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if (message->_prev) |
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message->_prev->_next = message->_next; |
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else |
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_front = message->_next; |
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_count--; |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL4, |
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"MessageQueue::remove _count = %d", _count); |
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} // mutex unlocks here |
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message->_prev = 0; |
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message->_next = 0; |
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message->_owner = 0; |
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PEG_METHOD_EXIT(); |
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} |
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Message* MessageQueue::findByType(Uint32 type) |
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{ |
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AutoMutex autoMut(_mut); |
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for (Message* m = front(); m; m = m->getNext()) |
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{ |
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if (m->getType() == type) |
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{ |
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return m; |
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} |
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} |
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return 0; |
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} |
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Message* MessageQueue::findByKey(Uint32 key) |
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{ |
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AutoMutex autoMut(_mut); |
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for (Message* m = front(); m; m = m->getNext()) |
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{ |
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if (m->getKey() == key) |
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{ |
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return m; |
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} |
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} |
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return 0; |
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} |
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void MessageQueue::print(ostream& os) const |
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{ |
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AutoMutex autoMut(const_cast<MessageQueue *>(this)->_mut); |
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for (const Message* m = front(); m; m = m->getNext()) |
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m->print(os); |
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} |
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Message* MessageQueue::find(Uint32 type, Uint32 key) |
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{ |
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AutoMutex autoMut(_mut); |
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for (Message* m = front(); m; m = m->getNext()) |
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{ |
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if (m->getType() == type && m->getKey() == key) |
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{ |
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return m; |
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} |
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} |
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return 0; |
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} |
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void MessageQueue::lock() |
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{ |
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_mut.lock(pegasus_thread_self()); |
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} |
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void MessageQueue::unlock() |
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{ |
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_mut.unlock(); |
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} |
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const char* MessageQueue::getQueueName() const |
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{ |
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return _name; |
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} |
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MessageQueue* MessageQueue::lookup(Uint32 queueId) |
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{ |
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MessageQueue* queue = 0; |
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AutoMutex autoMut(q_table_mut); |
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if (_queueTable.lookup(queueId, queue)) |
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{ |
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return queue; |
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} |
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// Not found! |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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"MessageQueue::lookup failure queueId = %u", queueId); |
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return 0; |
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} |
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MessageQueue* MessageQueue::lookup(const char *name) |
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{ |
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if(name == NULL) |
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throw NullPointer(); |
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AutoMutex autoMut(q_table_mut); |
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for(QueueTable::Iterator i = _queueTable.start(); i; i++) |
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{ |
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// ATTN: Need to decide how many characters to compare in queue names |
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if(! strcmp( ((MessageQueue *)i.value())->getQueueName(), name) ) |
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{ |
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return( (MessageQueue *)i.value()); |
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} |
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} |
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Tracer::trace(TRC_MESSAGEQUEUESERVICE, Tracer::LEVEL3, |
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"MessageQueue::lookup failure - name = %s", name); |
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return 0; |
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} |
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void MessageQueue::handleEnqueue() |
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{ |
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} |
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PEGASUS_NAMESPACE_END | PEGASUS_NAMESPACE_END |