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// $Id$
#include "tao/Muxed_TMS.h"
#include "tao/Reply_Dispatcher.h"
#include "tao/debug.h"
#include "Transport.h"
#include "ORB_Core.h"
#include "Client_Strategy_Factory.h"
ACE_RCSID (tao,
Muxed_TMS,
"$Id$")
TAO_Muxed_TMS::TAO_Muxed_TMS (TAO_Transport *transport)
: TAO_Transport_Mux_Strategy (transport)
, request_id_generator_ (0)
, orb_core_ (transport->orb_core ())
, dispatcher_table_ (this->orb_core_->client_factory ()->reply_dispatcher_table_size ())
{
this->lock_ =
this->orb_core_->client_factory ()->create_transport_mux_strategy_lock ();
}
TAO_Muxed_TMS::~TAO_Muxed_TMS (void)
{
delete this->lock_;
}
// Generate and return an unique request id for the current
// invocation.
CORBA::ULong
TAO_Muxed_TMS::request_id (void)
{
// @@ What is a good error return value?
ACE_GUARD_RETURN (ACE_Lock,
ace_mon,
*this->lock_,
0);
++this->request_id_generator_;
// if TAO_Transport::bidirectional_flag_
// == 1 --> originating side
// == 0 --> other side
// == -1 --> no bi-directional connection was negotiated
// The originating side must have an even request ID, and the other
// side must have an odd request ID. Make sure that is the case.
int bidir_flag =
this->transport_->bidirectional_flag ();
if ((bidir_flag == 1 && ACE_ODD (this->request_id_generator_))
|| (bidir_flag == 0 && ACE_EVEN (this->request_id_generator_)))
++this->request_id_generator_;
if (TAO_debug_level > 4)
ACE_DEBUG ((LM_DEBUG,
"TAO (%P|%t) - Muxed_TMS[%d]::request_id, <%d>\n",
this->transport_->id (),
this->request_id_generator_));
return this->request_id_generator_;
}
// Bind the dispatcher with the request id.
int
TAO_Muxed_TMS::bind_dispatcher (CORBA::ULong request_id,
TAO_Reply_Dispatcher *rd)
{
ACE_GUARD_RETURN (ACE_Lock,
ace_mon,
*this->lock_,
-1);
if (TAO_debug_level > 0 && rd == 0)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - TAO_Muxed_TMS::bind_dispatcher, ")
ACE_TEXT ("null reply dispatcher\n")));
if (rd == 0)
return 0;
int result =
this->dispatcher_table_.bind (request_id, rd);
if (result != 0)
{
if (TAO_debug_level > 0)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - TAO_Muxed_TMS::bind_dispatcher, ")
ACE_TEXT ("bind dispatcher failed: result = %d, request id = %d \n"),
result, request_id));
return -1;
}
return 0;
}
int
TAO_Muxed_TMS::unbind_dispatcher (CORBA::ULong request_id)
{
ACE_GUARD_RETURN (ACE_Lock,
ace_mon,
*this->lock_,
-1);
TAO_Reply_Dispatcher *rd = 0;
// @@TODO: WTH are we sending the rd in? We can just unbind using
// the request_id
return this->dispatcher_table_.unbind (request_id, rd);
}
int
TAO_Muxed_TMS::dispatch_reply (TAO_Pluggable_Reply_Params ¶ms)
{
int result = 0;
TAO_Reply_Dispatcher *rd = 0;
// Grab the reply dispatcher for this id.
{
ACE_GUARD_RETURN (ACE_Lock,
ace_mon,
*this->lock_,
-1);
result =
this->dispatcher_table_.unbind (params.request_id_, rd);
if (TAO_debug_level > 8)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - TAO_Muxed_TMS::dispatch_reply, ")
ACE_TEXT ("id = %d\n"),
params.request_id_));
if (result != 0)
{
if (TAO_debug_level > 0)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - TAO_Muxed_TMS::dispatch_reply, ")
ACE_TEXT ("unbind dispatcher failed: result = %d\n"),
result));
// This return value means that the mux strategy was not able
// to find a registered reply handler, either because the reply
// was not our reply - just forget about it - or it was ours, but
// the reply timed out - just forget about the reply.
return 0;
}
// Do not move it outside the scope of the lock. A follower thread
// could have timedout unwinding the stack and the reply
// dispatcher, and that would mean the present thread could be left
// with a dangling pointer and may crash. To safeguard againt such
// cases we dispatch with the lock held.
// Dispatch the reply.
// They return 1 on success, and -1 on failure.
result = rd->dispatch_reply (params);
}
return result;
}
bool
TAO_Muxed_TMS::idle_after_send (void)
{
// Irrespective of whether we are successful or not we need to
// return true. If *this* class is not successfull in idling the
// transport no one can.
if (this->transport_ != 0)
(void) this->transport_->make_idle ();
return true;
}
bool
TAO_Muxed_TMS::idle_after_reply (void)
{
return false;
}
void
TAO_Muxed_TMS::connection_closed (void)
{
ACE_GUARD (ACE_Lock,
ace_mon,
*this->lock_);
int retval = 0;
do
{
retval = this->clear_cache ();
}
while (retval != -1);
}
int
TAO_Muxed_TMS::clear_cache (void)
{
if (this->dispatcher_table_.current_size () == 0)
return -1;
REQUEST_DISPATCHER_TABLE::ITERATOR end =
this->dispatcher_table_.end ();
ACE_Unbounded_Stack <TAO_Reply_Dispatcher *> ubs;
for (REQUEST_DISPATCHER_TABLE::ITERATOR i =
this->dispatcher_table_.begin ();
i != end;
++i)
ubs.push ((*i).int_id_);
this->dispatcher_table_.unbind_all ();
size_t sz = ubs.size ();
for (size_t k = 0 ; k != sz ; ++k)
{
TAO_Reply_Dispatcher *rd = 0;
ubs.pop (rd);
rd->connection_closed ();
}
return 0;
}
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