TAO_Incoming_Message_Queue Class Reference

A queue of the messages in the incoming data path. More...

#include <Incoming_Message_Queue.h>

Collaboration diagram for TAO_Incoming_Message_Queue:

[legend]List of all members.

Public Member Functions
	TAO_Incoming_Message_Queue (TAO_ORB_Core *orb_core)
	Constructor.
	~TAO_Incoming_Message_Queue (void)
	Destructor.
TAO_Queued_Data *	dequeue_head (void)
	Adding and deleting a node from the queue.
TAO_Queued_Data *	dequeue_tail (void)
int	enqueue_tail (TAO_Queued_Data *nd)
CORBA::ULong	queue_length (void) const
	Return the length of the queue..
Private Attributes
TAO_Queued_Data *	last_added_
	A circular linked list of messages awaiting processing.
CORBA::ULong	size_
	The size of the queue.
TAO_ORB_Core *	orb_core_
	Copy of our ORB Core.
Friends
class	TAO_Transport

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Detailed Description

A queue of the messages in the incoming data path.

Please read the documentation in the TAO_Transport class to find out more about the design of the incoming data path.

Under certain conditions TAO may have to maintain a queue per-connection. This queue is drained by the pluggable protocols framework, normally under control of the ACE_Reactor, but other configurations are conceivable.

The memory that is allocated for holding the messages comes from the global pool for the following reasons

• the thread that reads a part of the message would not be the same thread that reads and fills the rest of the message
• the thread that actually processes the message can be totally different.

Definition at line 58 of file Incoming_Message_Queue.h.

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Constructor & Destructor Documentation

TAO_BEGIN_VERSIONED_NAMESPACE_DECL TAO_Incoming_Message_Queue::TAO_Incoming_Message_Queue (  TAO_ORB_Core *  orb_core  )

Constructor. Definition at line 19 of file Incoming_Message_Queue.cpp. : last_added_ (0), size_ (0), orb_core_ (orb_core) { }

TAO_Incoming_Message_Queue::~TAO_Incoming_Message_Queue (  void   )

Destructor. Definition at line 26 of file Incoming_Message_Queue.cpp. References dequeue_head(), and TAO_Queued_Data::release(). { const CORBA::ULong sz = this->size_; // Delete all the nodes left behind for (CORBA::ULong i = 0; i < sz; ++i) { TAO_Queued_Data *qd = this->dequeue_head (); TAO_Queued_Data::release (qd); } }

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Member Function Documentation

TAO_Queued_Data * TAO_Incoming_Message_Queue::dequeue_head (  void   )

Adding and deleting a node from the queue. Definition at line 42 of file Incoming_Message_Queue.cpp. References last_added_, and TAO_Queued_Data::next_. Referenced by TAO_Transport::process_queue_head(), and ~TAO_Incoming_Message_Queue(). { if (this->size_ == 0) return 0; // Get the node on the head of the queue... TAO_Queued_Data * const head = this->last_added_->next_; // Reset the head node.. this->last_added_->next_ = head->next_; // Decrease the size and reset last_added_ if empty if (--this->size_ == 0) this->last_added_ = 0; return head; }

TAO_Queued_Data * TAO_Incoming_Message_Queue::dequeue_tail (  void   )

Definition at line 61 of file Incoming_Message_Queue.cpp. References last_added_, and TAO_Queued_Data::next_. { // This is a bit painful stuff... if (this->size_ == 0) return 0; // Get the node on the head of the queue... TAO_Queued_Data *head = this->last_added_->next_; while (head->next_ != this->last_added_) { head = head->next_; } // Put the head in tmp. head->next_ = this->last_added_->next_; TAO_Queued_Data *ret_qd = this->last_added_; this->last_added_ = head; // Decrease the size if (--this->size_ == 0) this->last_added_ = 0; return ret_qd; }

int TAO_Incoming_Message_Queue::enqueue_tail (  TAO_Queued_Data *  nd  )

Definition at line 91 of file Incoming_Message_Queue.cpp. References last_added_, and TAO_Queued_Data::next_. Referenced by TAO_Transport::consolidate_enqueue_message(). { if (this->size_ == 0) { this->last_added_ = nd; this->last_added_->next_ = this->last_added_; } else { nd->next_ = this->last_added_->next_; this->last_added_->next_ = nd; this->last_added_ = nd; } ++ this->size_; return 0; }

TAO_BEGIN_VERSIONED_NAMESPACE_DECL ACE_INLINE CORBA::ULong TAO_Incoming_Message_Queue::queue_length (  void   )  const

Return the length of the queue.. Definition at line 11 of file Incoming_Message_Queue.inl. Referenced by TAO_Transport::handle_input_parse_data(), and TAO_Transport::process_queue_head(). { return this->size_; }

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Friends And Related Function Documentation

friend class TAO_Transport [friend]

Definition at line 78 of file Incoming_Message_Queue.h.

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Member Data Documentation

TAO_Queued_Data* TAO_Incoming_Message_Queue::last_added_ [private]

A circular linked list of messages awaiting processing. last_message_added_ points to the most recent message added to the list. The earliest addition can be easily accessed via last_message_added_->next_. Definition at line 88 of file Incoming_Message_Queue.h. Referenced by dequeue_head(), dequeue_tail(), and enqueue_tail().

TAO_ORB_Core* TAO_Incoming_Message_Queue::orb_core_ [private]

Copy of our ORB Core. Definition at line 94 of file Incoming_Message_Queue.h.

CORBA::ULong TAO_Incoming_Message_Queue::size_ [private]

The size of the queue. Definition at line 91 of file Incoming_Message_Queue.h.

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The documentation for this class was generated from the following files:

• Incoming_Message_Queue.h
• Incoming_Message_Queue.cpp
• Incoming_Message_Queue.inl

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