version 1.6, 2001/07/12 06:21:55
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version 1.6.2.8, 2001/12/10 18:34:06
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//%///////////////////////////////////////////////////////////////////////////// | //%///////////////////////////////////////////////////////////////////////////// |
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#include <Pegasus/Common/HashTable.h> | #include <Pegasus/Common/HashTable.h> |
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#include <Pegasus/Common/IPC.h> |
#include "MessageQueue.h" | #include "MessageQueue.h" |
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PEGASUS_USING_STD; | PEGASUS_USING_STD; |
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QueueTable; | QueueTable; |
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static QueueTable _queueTable(128); | static QueueTable _queueTable(128); |
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static Mutex q_table_mut = Mutex(); |
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static Uint32 _GetNextQueueId() |
static Uint32 _GetNextQueueId() throw(IPCException) |
{ | { |
static Uint32 _queueId = 1; |
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// Handle wrap-around! |
static Uint32 _queueId = 2; |
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static Mutex _id_mut = Mutex(); |
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_id_mut.lock(pegasus_thread_self()); |
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// Handle wrap-around! |
if (_queueId == 0) | if (_queueId == 0) |
_queueId++; |
_queueId = MessageQueue::_CIMOM_Q_ID; |
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Uint32 ret = _queueId++; |
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_id_mut.unlock(); |
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return _queueId++; |
return ret; |
} | } |
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MessageQueue::MessageQueue() : _count(0), _front(0), _back(0) |
Uint32 MessageQueue::_CIMOM_Q_ID = 1; |
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MessageQueue::MessageQueue() : _mut( ), _count(0), _front(0), _back(0) |
{ | { |
// ATTN-A: thread safety! | // ATTN-A: thread safety! |
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q_table_mut.lock(pegasus_thread_self()); |
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memset(_name, 0x00, 26); |
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while (!_queueTable.insert(_queueId = _GetNextQueueId(), this)) | while (!_queueTable.insert(_queueId = _GetNextQueueId(), this)) |
; | ; |
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q_table_mut.unlock(); |
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} |
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MessageQueue::MessageQueue(char *name) : _mut( ), _count(0), _front(0), _back(0) |
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{ |
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if(name != NULL) |
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{ |
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strncpy(_name, name, 25); |
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_name[25] = 0x00; |
} | } |
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else |
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memset(_name, 0x00,25); |
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q_table_mut.lock(pegasus_thread_self()); |
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while (!_queueTable.insert(_queueId = _GetNextQueueId(), this)) |
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; |
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q_table_mut.unlock(); |
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} |
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MessageQueue::~MessageQueue() | MessageQueue::~MessageQueue() |
{ | { |
// ATTN-A: thread safety! | // ATTN-A: thread safety! |
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q_table_mut.lock(pegasus_thread_self()); |
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_queueTable.remove(_queueId); | _queueTable.remove(_queueId); |
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q_table_mut.unlock(); |
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} | } |
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void MessageQueue::enqueue(Message* message) |
void MessageQueue::enqueue(Message* message) throw(IPCException) |
{ | { |
if (!message) | if (!message) |
throw NullPointer(); | throw NullPointer(); |
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_mut.lock(pegasus_thread_self()); |
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if (getenv("PEGASUS_TRACE")) |
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{ |
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cout << "===== " << getQueueName() << ": "; |
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message->print(cout); |
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} |
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if (_back) | if (_back) |
{ | { |
_back->_next = message; | _back->_next = message; |
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} | } |
message->_owner = this; | message->_owner = this; |
_count++; | _count++; |
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_mut.unlock(); |
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handleEnqueue(); | handleEnqueue(); |
} | } |
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Message* MessageQueue::dequeue() |
Message* MessageQueue::dequeue() throw(IPCException) |
{ | { |
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_mut.lock(pegasus_thread_self()); |
if (_front) | if (_front) |
{ | { |
Message* message = _front; | Message* message = _front; |
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if (_back == message) | if (_back == message) |
_back = 0; | _back = 0; |
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_count--; |
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_mut.unlock(); |
message->_next = 0; | message->_next = 0; |
message->_prev = 0; | message->_prev = 0; |
message->_owner = 0; | message->_owner = 0; |
_count--; |
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return message; | return message; |
} | } |
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_mut.unlock(); |
return 0; | return 0; |
} | } |
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void MessageQueue::remove(Message* message) |
void MessageQueue::remove(Message* message) throw(IPCException) |
{ | { |
if (!message) | if (!message) |
throw NullPointer(); | throw NullPointer(); |
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if (message->_owner != this) | if (message->_owner != this) |
throw NoSuchMessageOnQueue(); | throw NoSuchMessageOnQueue(); |
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_mut.lock(pegasus_thread_self()); |
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if (message->_next) | if (message->_next) |
message->_next->_prev = message->_prev; | message->_next->_prev = message->_prev; |
else | else |
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else | else |
_front = message->_next; | _front = message->_next; |
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_count--; |
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_mut.unlock(); |
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message->_prev = 0; | message->_prev = 0; |
message->_next = 0; | message->_next = 0; |
message->_owner = 0; | message->_owner = 0; |
_count--; |
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} | } |
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Message* MessageQueue::findByType(Uint32 type) |
Message* MessageQueue::findByType(Uint32 type) throw(IPCException) |
{ | { |
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_mut.lock(pegasus_thread_self()); |
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for (Message* m = front(); m; m = m->getNext()) | for (Message* m = front(); m; m = m->getNext()) |
{ | { |
if (m->getType() == type) | if (m->getType() == type) |
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{ |
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_mut.unlock(); |
return m; | return m; |
} | } |
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} |
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_mut.unlock(); |
return 0; | return 0; |
} | } |
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Message* MessageQueue::findByKey(Uint32 key) |
Message* MessageQueue::findByKey(Uint32 key) throw(IPCException) |
{ | { |
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_mut.lock(pegasus_thread_self()); |
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for (Message* m = front(); m; m = m->getNext()) | for (Message* m = front(); m; m = m->getNext()) |
{ | { |
if (m->getKey() == key) | if (m->getKey() == key) |
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{ |
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_mut.unlock(); |
return m; | return m; |
} | } |
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} |
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_mut.unlock(); |
return 0; | return 0; |
} | } |
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void MessageQueue::print(ostream& os) const |
void MessageQueue::print(ostream& os) const throw(IPCException) |
{ | { |
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const_cast<MessageQueue *>(this)->_mut.lock(pegasus_thread_self()); |
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for (const Message* m = front(); m; m = m->getNext()) | for (const Message* m = front(); m; m = m->getNext()) |
m->print(os); | m->print(os); |
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const_cast<MessageQueue *>(this)->_mut.unlock(); |
} | } |
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Message* MessageQueue::find(Uint32 type, Uint32 key) |
Message* MessageQueue::find(Uint32 type, Uint32 key) throw(IPCException) |
{ | { |
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_mut.lock(pegasus_thread_self()); |
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for (Message* m = front(); m; m = m->getNext()) | for (Message* m = front(); m; m = m->getNext()) |
{ | { |
if (m->getType() == type && m->getKey() == key) | if (m->getType() == type && m->getKey() == key) |
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{ |
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_mut.unlock(); |
return m; | return m; |
} | } |
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} |
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_mut.unlock(); |
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return 0; | return 0; |
} | } |
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void MessageQueue::lock() |
void MessageQueue::lock() throw(IPCException) |
{ | { |
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_mut.lock(pegasus_thread_self()); |
} | } |
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void MessageQueue::unlock() | void MessageQueue::unlock() |
{ | { |
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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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if(_name[0] != 0x00) |
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return _name; |
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return "unknown"; |
} | } |
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MessageQueue* MessageQueue::lookup(Uint32 queueId) |
MessageQueue* MessageQueue::lookup(Uint32 queueId) throw(IPCException) |
{ | { |
MessageQueue* queue = 0; | MessageQueue* queue = 0; |
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q_table_mut.lock(pegasus_thread_self()); |
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if (_queueTable.lookup(queueId, queue)) | if (_queueTable.lookup(queueId, queue)) |
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{ |
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q_table_mut.unlock(); |
return queue; | return queue; |
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} |
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// Not found! | // Not found! |
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q_table_mut.unlock(); |
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return 0; | return 0; |
} | } |
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MessageQueue* MessageQueue::lookup(const char *name) throw(IPCException) |
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{ |
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if(name == NULL) |
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throw NullPointer(); |
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q_table_mut.lock(pegasus_thread_self()); |
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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(! strncmp( ((MessageQueue *)i.value())->getQueueName(), name, 25) ) |
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{ |
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q_table_mut.unlock(); |
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return( (MessageQueue *)i.value()); |
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} |
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} |
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q_table_mut.unlock(); |
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return 0; |
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} |
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void MessageQueue::handleEnqueue() | void MessageQueue::handleEnqueue() |
{ | { |
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