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// -*- C++ -*-
// $Id$
// ****************************************************************
ACE_INLINE
TAO_Leader_Follower::TAO_Leader_Follower (TAO_ORB_Core* orb_core,
TAO_New_Leader_Generator *new_leader_generator)
: orb_core_ (orb_core),
reverse_lock_ (lock_),
leaders_ (0),
clients_ (0),
reactor_ (0),
client_thread_is_leader_ (0),
event_loop_threads_waiting_ (0),
event_loop_threads_condition_ (lock_),
new_leader_generator_ (new_leader_generator)
{
}
ACE_INLINE TAO_ORB_Core_TSS_Resources *
TAO_Leader_Follower::get_tss_resources (void) const
{
return this->orb_core_->get_tss_resources ();
}
ACE_INLINE int
TAO_Leader_Follower::follower_available (void) const
{
return !this->follower_set_.empty ();
}
ACE_INLINE void
TAO_Leader_Follower::no_leaders_available (void)
{
if (this->new_leader_generator_)
this->new_leader_generator_->no_leaders_available ();
}
ACE_INLINE int
TAO_Leader_Follower::elect_new_leader (void)
{
if (this->leaders_ == 0)
{
if (this->event_loop_threads_waiting_)
{
return this->event_loop_threads_condition_.broadcast ();
}
else if (this->follower_available ())
{
return this->elect_new_leader_i ();
}
else
{
this->no_leaders_available ();
}
}
return 0;
}
ACE_INLINE int
TAO_Leader_Follower::set_event_loop_thread (ACE_Time_Value *max_wait_time)
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
// Make sure that there is no other client thread run the show. If
// we are the client thread running the show, then it is ok.
if (this->client_thread_is_leader_ &&
tss->client_leader_thread_ == 0)
{
int result =
this->wait_for_client_leader_to_complete (max_wait_time);
if (result != 0)
return result;
}
// If <event_loop_thread_> == 0 and <client_leader_thread_> == 0, we
// are running the event loop for the first time. Therefore,
// increment the leaders. Otherwise, simply increment
// <event_loop_thread_> since either (a) if <event_loop_thread_> !=
// 0 this is a nested call to the event loop, or (b)
// <client_leader_thread_> != 0 this is a call to the event loop
// while we are a client leader.
if (tss->event_loop_thread_ == 0 &&
tss->client_leader_thread_ == 0)
++this->leaders_;
++tss->event_loop_thread_;
return 0;
}
ACE_INLINE void
TAO_Leader_Follower::reset_event_loop_thread_i (TAO_ORB_Core_TSS_Resources *tss)
{
// Always decrement <event_loop_thread_>. If <event_loop_thread_>
// reaches 0 and we are not a client leader, we are done with our
// duties of running the event loop. Therefore, decrement the
// leaders. Otherwise, we just got done with a nested call to the
// event loop or a call to the event loop when we were the client
// leader.
--tss->event_loop_thread_;
if (tss->event_loop_thread_ == 0 &&
tss->client_leader_thread_ == 0)
--this->leaders_;
}
ACE_INLINE void
TAO_Leader_Follower::reset_event_loop_thread (void)
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
if (tss->event_loop_thread_ > 0)
this->reset_event_loop_thread_i (tss);
}
ACE_INLINE TAO_SYNCH_MUTEX &
TAO_Leader_Follower::lock (void)
{
return this->lock_;
}
ACE_INLINE void
TAO_Leader_Follower::set_upcall_thread (void)
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
if (tss->event_loop_thread_ > 0)
{
ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, this->lock ());
this->reset_event_loop_thread_i (tss);
this->elect_new_leader ();
}
}
ACE_INLINE int
TAO_Leader_Follower::leader_available (void) const
{
return this->leaders_ != 0;
}
ACE_INLINE void
TAO_Leader_Follower::set_client_leader_thread (void)
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
++this->leaders_;
++this->client_thread_is_leader_;
++tss->client_leader_thread_;
}
ACE_INLINE void
TAO_Leader_Follower::reset_client_leader_thread (void)
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
--tss->client_leader_thread_;
--this->leaders_;
--this->client_thread_is_leader_;
}
ACE_INLINE int
TAO_Leader_Follower::is_client_leader_thread (void) const
{
TAO_ORB_Core_TSS_Resources *tss = this->get_tss_resources ();
return tss->client_leader_thread_ != 0;
}
ACE_INLINE void
TAO_Leader_Follower::add_follower (TAO_LF_Follower *follower)
{
this->follower_set_.push_back (follower);
}
ACE_INLINE void
TAO_Leader_Follower::remove_follower (TAO_LF_Follower *follower)
{
this->follower_set_.remove (follower);
}
ACE_INLINE ACE_Reverse_Lock<TAO_SYNCH_MUTEX> &
TAO_Leader_Follower::reverse_lock (void)
{
return this->reverse_lock_;
}
ACE_INLINE int
TAO_Leader_Follower::has_clients (void) const
{
return this->clients_;
}
// ****************************************************************
ACE_INLINE
TAO_LF_Client_Thread_Helper::TAO_LF_Client_Thread_Helper (TAO_Leader_Follower &leader_follower)
: leader_follower_ (leader_follower)
{
this->leader_follower_.set_client_thread ();
}
ACE_INLINE
TAO_LF_Client_Thread_Helper::~TAO_LF_Client_Thread_Helper (void)
{
this->leader_follower_.reset_client_thread ();
}
ACE_INLINE
TAO_LF_Client_Leader_Thread_Helper::TAO_LF_Client_Leader_Thread_Helper (TAO_Leader_Follower &leader_follower)
: leader_follower_ (leader_follower)
{
this->leader_follower_.set_client_leader_thread ();
}
ACE_INLINE
TAO_LF_Client_Leader_Thread_Helper::~TAO_LF_Client_Leader_Thread_Helper (void)
{
this->leader_follower_.reset_client_leader_thread ();
}
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