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// $Id$
#include "ThreadPool_Task.h"
ACE_RCSID(Notify, TAO_Notify_ThreadPool_Task, "$Id$")
#include "Properties.h"
#include "Timer_Queue.h"
#include "Buffering_Strategy.h"
#include "tao/debug.h"
#include "tao/ORB_Core.h"
#include "ace/OS_NS_errno.h"
TAO_Notify_ThreadPool_Task::TAO_Notify_ThreadPool_Task (void)
: shutdown_ (false)
, shutdown_handler_(this)
{
}
TAO_Notify_ThreadPool_Task::~TAO_Notify_ThreadPool_Task ()
{
}
int
TAO_Notify_ThreadPool_Task::init (int argc, ACE_TCHAR **argv)
{
return this->ACE_Task<ACE_NULL_SYNCH>::init (argc, argv);
}
TAO_Notify_Timer*
TAO_Notify_ThreadPool_Task::timer (void)
{
return this->timer_.get();
}
void
TAO_Notify_ThreadPool_Task::init (const NotifyExt::ThreadPoolParams& tp_params, TAO_Notify_AdminProperties::Ptr& admin_properties ACE_ENV_ARG_DECL)
{
ACE_ASSERT (this->timer_.get() == 0);
TAO_Notify_Timer_Queue* timer = 0;
ACE_NEW_THROW_EX (timer,
TAO_Notify_Timer_Queue (),
CORBA::NO_MEMORY ());
ACE_CHECK;
this->timer_.reset (timer);
TAO_Notify_Buffering_Strategy* buffering_strategy = 0;
ACE_NEW_THROW_EX (buffering_strategy,
TAO_Notify_Buffering_Strategy (*msg_queue (), admin_properties),
CORBA::NO_MEMORY ());
this->buffering_strategy_.reset (buffering_strategy);
ACE_CHECK;
long flags = THR_NEW_LWP | THR_JOINABLE;
CORBA::ORB_var orb =
TAO_Notify_PROPERTIES::instance()->orb ();
flags |=
orb->orb_core ()->orb_params ()->thread_creation_flags ();
// Guards the thread for auto-deletion; paired with close.
// This is done in the originating thread before the spawn to
// avoid any race conditions.
for ( CORBA::ULong i = 0; i < tp_params.static_threads; ++i )
{
this->_incr_refcnt();
}
// Become an active object.
if (this->ACE_Task <ACE_NULL_SYNCH>::activate (flags,
tp_params.static_threads,
0,
ACE_THR_PRI_OTHER_DEF) == -1)
{
// Undo the ref counts on error
for ( CORBA::ULong i = 0; i < tp_params.static_threads; ++i )
{
this->_decr_refcnt();
}
if (TAO_debug_level > 0)
{
if (ACE_OS::last_error () == EPERM)
ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("Insufficient privilege.\n")));
else
ACE_DEBUG ((LM_ERROR,
ACE_TEXT ("(%t) task activation at priority %d failed\n")
ACE_TEXT ("exiting!\n%a"),
tp_params.default_priority));
}
ACE_THROW (CORBA::BAD_PARAM ());
}
}
void
TAO_Notify_ThreadPool_Task::execute (TAO_Notify_Method_Request& method_request ACE_ENV_ARG_DECL)
{
if (!shutdown_)
{
TAO_Notify_Method_Request_Queueable& request_copy = *method_request.copy (ACE_ENV_SINGLE_ARG_PARAMETER);
// Ignore the return value, because we already print an error
// message if enqueing fails.
this->buffering_strategy_->enqueue (request_copy);
}
}
int
TAO_Notify_ThreadPool_Task::svc (void)
{
TAO_Notify_Method_Request_Queueable* method_request;
while (!shutdown_)
{
ACE_TRY_NEW_ENV
{
ACE_Time_Value* dequeue_blocking_time = 0;
ACE_Time_Value earliest_time;
if (!this->timer_->impl().is_empty ())
{
earliest_time = this->timer_->impl().earliest_time ();
dequeue_blocking_time = &earliest_time;
}
// Dequeue 1 item
int result = buffering_strategy_->dequeue (method_request, dequeue_blocking_time);
if (result > 0)
{
method_request->execute (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
ACE_Message_Block::release (method_request);
}
else if (errno == ETIME)
{
this->timer_->impl ().expire ();
}
else if (result == -1)
{
if (TAO_debug_level > 0)
ACE_DEBUG ((LM_DEBUG, "ThreadPool_Task dequeue failed\n"));
}
}
ACE_CATCHANY
{
ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
"ThreadPool_Task (%P|%t) exception in method request\n");
}
ACE_ENDTRY;
} /* while */
return 0;
}
void
TAO_Notify_ThreadPool_Task::shutdown (void)
{
if (this->shutdown_)
{
return;
}
this->shutdown_ = true;
this->buffering_strategy_->shutdown ();
// be sure this object is not deleted until wait() returns
this->_incr_refcnt ();
// get another thread to wait() for the thread(s) running svc() to exit
// otherwise the thread is a zombie on Solaris and just hangs around
// on windows.
TAO_Notify_PROPERTIES::instance()
->orb ()->orb_core ()->reactor ()->notify (&shutdown_handler_);
}
void
TAO_Notify_ThreadPool_Task::release (void)
{
delete this;
}
int
TAO_Notify_ThreadPool_Task::close (u_long /*flags*/)
{
// Undo the thread spawn guard. close is called per thread spawned.
this->_decr_refcnt();
return 0;
}
void
TAO_Notify_ThreadPool_Task::wait_for_shutdown ()
{
// wait for thread(s) running svc() to return.
this->wait ();
// Undo the shutdown request guard.
this->_decr_refcnt ();
}
void
TAO_Notify_ThreadPool_Task::update_qos_properties (const TAO_Notify_QoSProperties& qos_properties)
{
this->buffering_strategy_->update_qos_properties (qos_properties);
}
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