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// $Id$
#include "Leader_Follower.h"
#include "Resource_Factory.h"
#include "ace/Reactor.h"
#if !defined (__ACE_INLINE__)
# include "Leader_Follower.i"
#endif /* ! __ACE_INLINE__ */
ACE_RCSID(tao, Leader_Follower, "$Id$")
TAO_Leader_Follower::~TAO_Leader_Follower (void)
{
// Hand the reactor back to the resource factory.
this->orb_core_->resource_factory ()->reclaim_reactor (this->reactor_);
this->reactor_ = 0;
}
TAO_SYNCH_CONDITION*
TAO_Leader_Follower::get_next_follower (void)
{
ACE_Unbounded_Set_Iterator<TAO_SYNCH_CONDITION *> iterator (
this->follower_set_);
if (iterator.first () == 0)
// means set is empty
return 0;
TAO_SYNCH_CONDITION *cond = *iterator;
#if defined (TAO_DEBUG_LEADER_FOLLOWER)
ACE_DEBUG ((LM_DEBUG,
"TAO (%P|%t) LF::get_next_follower - "
"follower is %x\n",
cond));
#endif /* TAO_DEBUG_LEADER_FOLLOWER */
// We *must* remove it when we signal it so the same condition is
// not signalled for both wake up as a follower and as the next
// leader.
// The follower may not be there if the reply is received while the
// consumer is not yet waiting for it (i.e. it send the request but
// has not blocked to receive the reply yet)
(void) this->remove_follower (cond); // Ignore errors..
return cond;
}
int
TAO_Leader_Follower::wait_for_client_leader_to_complete (ACE_Time_Value *max_wait_time)
{
int result = 0;
ACE_Countdown_Time countdown (max_wait_time);
// Note that we are waiting.
++this->event_loop_threads_waiting_;
while (this->client_thread_is_leader_ &&
result != -1)
{
if (max_wait_time == 0)
{
if (this->event_loop_threads_condition_.wait () == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("TAO (%P|%t): TAO_Leader_Follower::wait_for_client_leader_to_complete - ")
ACE_TEXT ("Condition variable wait failed\n")));
result = -1;
}
}
else
{
countdown.update ();
ACE_Time_Value tv = ACE_OS::gettimeofday ();
tv += *max_wait_time;
if (this->event_loop_threads_condition_.wait (&tv) == -1)
{
if (errno != ETIME)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("TAO (%P|%t): TAO_Leader_Follower::wait_for_client_leader_to_complete - ")
ACE_TEXT ("Condition variable wait failed\n")));
result = -1;
}
}
}
// Reset waiting state.
--this->event_loop_threads_waiting_;
return result;
}
ACE_Reactor *
TAO_Leader_Follower::reactor (void)
{
if (this->reactor_ == 0)
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, ace_mon, this->lock (), 0);
if (this->reactor_ == 0)
{
this->reactor_ =
this->orb_core_->resource_factory ()->get_reactor ();
}
}
return this->reactor_;
}
void
TAO_Leader_Follower::set_client_thread (void)
{
// If we were a leader thread or an event loop thread, give up
// leadership.
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
if (tss->event_loop_thread_ ||
tss->client_leader_thread_)
{
--this->leaders_;
}
if (this->clients_ == 0 &&
this->orb_core_->has_shutdown ())
{
// The ORB has shutdown and we are the first client after
// that. This means that the reactor is disabled, we must
// re-enable it if we want to receive any replys...
this->orb_core_->reactor ()->reset_reactor_event_loop ();
}
this->clients_++;
}
void
TAO_Leader_Follower::reset_client_thread (void)
{
// If we were a leader thread or an event loop thread, take back
// leadership.
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
if (tss->event_loop_thread_ ||
tss->client_leader_thread_)
{
++this->leaders_;
}
this->clients_--;
if (this->clients_ == 0 && this->orb_core_->has_shutdown ())
{
// The ORB has shutdown and we are the last client thread, we
// must stop the reactor to ensure that any server threads go
// away.
this->orb_core_->reactor ()->end_reactor_event_loop ();
}
}
#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
template class ACE_Node<TAO_SYNCH_CONDITION*>;
template class ACE_Unbounded_Set<TAO_SYNCH_CONDITION*>;
template class ACE_Unbounded_Set_Iterator<TAO_SYNCH_CONDITION*>;
#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#pragma instantiate ACE_Node<TAO_SYNCH_CONDITION*>
#pragma instantiate ACE_Unbounded_Set<TAO_SYNCH_CONDITION*>
#pragma instantiate ACE_Unbounded_Set_Iterator<TAO_SYNCH_CONDITION*>
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
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