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// -*- C++ -*-
// $Id$
#include "Transport.h"
#include "Exception.h"
#include "ORB_Core.h"
#include "Client_Strategy_Factory.h"
#include "Wait_Strategy.h"
#include "Transport_Mux_Strategy.h"
#include "Stub.h"
#include "Sync_Strategies.h"
#if !defined (__ACE_INLINE__)
# include "Transport.inl"
#endif /* __ACE_INLINE__ */
ACE_RCSID(tao, Transport, "$Id$")
// Constructor.
TAO_Transport::TAO_Transport (CORBA::ULong tag,
TAO_ORB_Core *orb_core)
: tag_ (tag)
, orb_core_ (orb_core)
, buffering_queue_ (0)
, buffering_timer_id_ (0)
, bidirectional_flag_ (-1)
{
TAO_Client_Strategy_Factory *cf =
this->orb_core_->client_factory ();
// Create WS now.
this->ws_ = cf->create_wait_strategy (this);
// Create TMS now.
this->tms_ = cf->create_transport_mux_strategy (this);
}
TAO_Transport::~TAO_Transport (void)
{
delete this->ws_;
this->ws_ = 0;
delete this->tms_;
this->tms_ = 0;
delete this->buffering_queue_;
}
ssize_t
TAO_Transport::send_or_buffer (TAO_Stub *stub,
int two_way,
const ACE_Message_Block *message_block,
const ACE_Time_Value *max_wait_time)
{
if (stub == 0 || two_way)
return this->send (message_block, max_wait_time);
TAO_Sync_Strategy &sync_strategy = stub->sync_strategy ();
return sync_strategy.send (*this,
*stub,
message_block,
max_wait_time);
}
ssize_t
TAO_Transport::send_buffered_messages (const ACE_Time_Value *max_wait_time)
{
// Make sure we have a buffering queue and there are messages in it.
if (this->buffering_queue_ == 0 ||
this->buffering_queue_->is_empty ())
return 1;
// Get the first message from the queue.
ACE_Message_Block *queued_message = 0;
ssize_t result = this->buffering_queue_->peek_dequeue_head (queued_message);
// @@ What to do here on failures?
ACE_ASSERT (result != -1);
// Actual network send.
size_t bytes_transferred = 0;
result = this->send (queued_message,
max_wait_time,
&bytes_transferred);
// Cannot send completely: timed out.
if (result == -1 &&
errno == ETIME)
{
if (bytes_transferred > 0)
{
// If successful in sending some of the data, reset the
// queue appropriately.
this->reset_queued_message (queued_message,
bytes_transferred);
// Indicate some success.
return bytes_transferred;
}
// Since we queue up the message, this is not an error. We can
// try next time around.
return 1;
}
// EOF or other errors.
if (result == -1 ||
result == 0)
{
this->dequeue_all ();
return -1;
}
// If successful in sending data, reset the queue appropriately.
this->reset_queued_message (queued_message,
bytes_transferred);
// Everything was successfully delivered.
return result;
}
void
TAO_Transport::reset_sent_message (ACE_Message_Block *message_block,
size_t bytes_delivered)
{
this->reset_message (message_block,
bytes_delivered,
0);
}
void
TAO_Transport::reset_queued_message (ACE_Message_Block *message_block,
size_t bytes_delivered)
{
this->reset_message (message_block,
bytes_delivered,
1);
}
void
TAO_Transport::reset_message (ACE_Message_Block *message_block,
size_t bytes_delivered,
int queued_message)
{
while (bytes_delivered != 0)
{
// Our current message block chain.
ACE_Message_Block *current_message_block = message_block;
int completely_delivered_current_message_block_chain = 0;
while (current_message_block != 0 &&
bytes_delivered != 0)
{
size_t current_message_block_length =
current_message_block->length ();
int completely_delivered_current_message_block =
bytes_delivered >= current_message_block_length;
size_t adjustment_size =
ACE_MIN (current_message_block_length, bytes_delivered);
// Reset according to send size.
current_message_block->rd_ptr (adjustment_size);
// If queued message, adjust the queue.
if (queued_message)
// Hand adjust <message_length>.
this->buffering_queue_->message_length (
this->buffering_queue_->message_length () - adjustment_size);
// Adjust <bytes_delivered>.
bytes_delivered -= adjustment_size;
if (completely_delivered_current_message_block)
{
// Next message block in the continuation chain.
current_message_block = current_message_block->cont ();
if (current_message_block == 0)
completely_delivered_current_message_block_chain = 1;
}
}
if (completely_delivered_current_message_block_chain)
{
// Go to the next message block chain.
message_block = message_block->next ();
// If queued message, adjust the queue.
if (queued_message)
// Release this <current_message_block>.
this->dequeue_head ();
}
}
}
int
TAO_Transport::idle_after_send (void)
{
return this->tms ()->idle_after_send ();
}
int
TAO_Transport::idle_after_reply (void)
{
return this->tms ()->idle_after_reply ();
}
TAO_SYNCH_CONDITION *
TAO_Transport::leader_follower_condition_variable (void)
{
return this->wait_strategy ()->leader_follower_condition_variable ();
}
int
TAO_Transport::tear_listen_point_list (TAO_InputCDR &)
{
ACE_NOTSUP_RETURN(-1);
}
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