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#include "tao/Dynamic_TP/DTP_Thread_Pool.h"
#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
#if ! defined (__ACE_INLINE__)
#include "tao/Dynamic_TP/DTP_Thread_Pool.inl"
#endif /* __ACE_INLINE__ */
#include "tao/Exception.h"
#include "tao/ORB_Core.h"
#include "tao/ORB_Core_TSS_Resources.h"
#include "tao/TSS_Resources.h"
#include "tao/ORB.h"
#include "tao/Acceptor_Registry.h"
#include "tao/debug.h"
#include "tao/LF_Follower.h"
#include "tao/Leader_Follower.h"
#include "ace/Auto_Ptr.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
TAO_DTP_New_Leader_Generator::TAO_DTP_New_Leader_Generator (
TAO_DTP_Thread_Pool &p)
: pool_ (p)
{
}
bool
TAO_DTP_New_Leader_Generator::no_leaders_available (void)
{
return this->pool_.new_dynamic_thread ();
}
TAO_DTP_Termination_Waiter::TAO_DTP_Termination_Waiter (TAO_DTP_Thread_Pool &p)
: ACE_Task_Base (p.manager ().orb_core ().thr_mgr ()),
pool_ (p)
{
}
int
TAO_DTP_Termination_Waiter::svc (void)
{
do
{
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
guard,
this->pool_.termination_lock_,
-1);
this->pool_.termination_cond_.wait ();
}
}
while (this->pool_.active_count_ > 0);
return 0;
}
TAO_DTP_Thread_Pool_Threads::TAO_DTP_Thread_Pool_Threads (TAO_DTP_Thread_Pool &p)
: ACE_Task_Base (p.manager ().orb_core ().thr_mgr ()),
pool_ (p)
{
}
int
TAO_DTP_Thread_Pool_Threads::svc (void)
{
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) new DTP thread signaling waiter\n")));
}
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
guard,
this->pool_.activation_lock_,
-1);
this->pool_.activation_cond_.broadcast ();
}
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) new DTP thread signal complete\n")));
}
TAO_ORB_Core &orb_core = this->pool_.manager ().orb_core ();
if (orb_core.has_shutdown ())
return 0;
try
{
// Do the work
this->run (orb_core);
}
catch (const ::CORBA::Exception& ex)
{
// No point propagating this exception. Print it out.
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT ("orb->run() raised exception for thread %t\n")));
ex._tao_print_exception ("");
}
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
guard,
this->pool_.termination_lock_,
-1);
this->pool_.termination_cond_.broadcast ();
}
return 0;
}
int
TAO_DTP_Thread_Pool_Threads::run (TAO_ORB_Core &orb_core)
{
CORBA::ORB_ptr orb = orb_core.orb ();
// A timeout is specified, run the ORB in an idle loop, if we
// don't handle any operations for the given timeout we just
// exit the loop and this thread ends itself.
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - DTP Pool %d - ")
ACE_TEXT ("Starting worker, count = %d; ")
ACE_TEXT ("setting timeout for %d sec, %d usec\n"),
this->pool_.id (),
this->thr_count (),
this->pool_.dynamic_thread_time().sec(),
this->pool_.dynamic_thread_time().usec()));
}
ACE_Time_Value tv;
this->pool_.add_active();
bool must_deactivate = true;
while (!orb_core.has_shutdown ())
{
tv = this->pool_.dynamic_thread_time ();
orb->perform_work (tv);
bool timeout = errno == ETIME;
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - DTP Pool %d ")
ACE_TEXT ("run: above_min = %d, timeout = %d\n"),
this->pool_.id(), this->pool_.above_minimum(), timeout));
}
if (timeout && this->pool_.remove_active (false))
{
// we've timed out, but the pool is not yet at the minimum
must_deactivate = false;
break;
}
}
if (must_deactivate)
{
this->pool_.remove_active (true);
}
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - DTP Pool %d ")
ACE_TEXT ("Terminating worker, remaining pool thread count = %d\n"),
this->pool_.id (),
this->thr_count () - 1));
}
return 0;
}
bool
TAO_DTP_Thread_Pool::above_minimum (void)
{
return this->definition_.min_threads_ > 0 &&
(int)this->active_count_ > this->definition_.min_threads_;
}
CORBA::ULong
TAO_DTP_Thread_Pool::current_threads () const
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
mon,
this->lock_,
0);
return static_cast<CORBA::ULong> (this->threads_.thr_count ());
}
void
TAO_DTP_Thread_Pool::add_active (void)
{
ACE_GUARD (TAO_SYNCH_MUTEX, mon, this->lock_);
++this->active_count_;
}
bool
TAO_DTP_Thread_Pool::remove_active (bool force)
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, mon, this->lock_, false);
if (force || this->above_minimum())
{
--this->active_count_;
return true;
}
return false;
}
int
TAO_DTP_Thread_Pool::create_initial_threads (void)
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
mon,
this->lock_,
0);
// Create initial threads.
// first, create the minimum number of threads as static
// if the min threads count is -1 that means all threads are static
size_t count = (size_t)this->definition_.init_threads_;
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) DTP_Thread_Pool::create_initial_threads ")
ACE_TEXT ("Creating %d threads\n"),
count));
}
int result = this->create_threads_i (count);
if (result == 0)
{
this->waiter_.activate (THR_NEW_LWP | THR_JOINABLE);
}
return result;
}
bool
TAO_DTP_Thread_Pool::new_dynamic_thread (void)
{
// Note that we are checking this condition below without the lock
// held.
if (TAO_debug_level > 0)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) DTP Pool %d new_dynamic_thread, ")
ACE_TEXT ("max = %d, current = %d\n"),
this->id_, this->definition_.max_threads_,
(int)this->threads_.thr_count ()));
}
if (this->manager_.orb_core ().has_shutdown () || this->shutdown_ ||
(this->definition_.max_threads_ > 0 &&
(int)this->active_count_ >= this->definition_.max_threads_))
{
return false;
}
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
mon,
this->lock_,
false);
if (this->definition_.max_threads_ == -1 ||
(int)this->active_count_ < this->definition_.max_threads_)
{
if (TAO_debug_level > 7)
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) DTP Pool %d new_dynamic_thread, ")
ACE_TEXT ("count = %d, creating new thread\n"),
this->id_,
this->active_count_));
if (this->create_threads_i (1))
{
if (TAO_debug_level > 0)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT ("Pool %d Thread %t: ")
ACE_TEXT ("cannot create dynamic thread\n"),
this->id_));
}
return false;
}
}
return true;
}
int
TAO_DTP_Thread_Pool::create_threads_i (size_t count)
{
// Overwritten parameters.
int force_active = 1;
long thread_flags = THR_NEW_LWP | THR_DETACHED;
// Default parameters.
int default_grp_id = -1;
ACE_Task_Base *default_task = 0;
ACE_hthread_t *default_thread_handles = 0;
void **default_stack = 0;
// Setting stack size.
size_t *stack_size_array = 0;
ACE_NEW_RETURN (stack_size_array,
size_t[count],
-1);
size_t index;
for (index = 0; index != count; ++index)
stack_size_array[index] =
this->definition_.stack_size_;
// Make sure the dynamically created stack size array is properly
// deleted.
ACE_Auto_Basic_Array_Ptr<size_t> auto_stack_size_array (stack_size_array);
TAO_ORB_Core &orb_core = manager_.orb_core ();
long flags =
thread_flags |
orb_core.orb_params ()->thread_creation_flags ();
int default_priority = 0;
int result = 0;
// Activate the threads.
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) new DTP thread requested\n")));
}
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX,
guard,
this->activation_lock_,
-1);
result =
this->threads_.activate (flags,
static_cast<int> (count),
force_active,
default_grp_id,
default_priority,
default_task,
default_thread_handles,
default_stack,
stack_size_array);
if (result == 0)
{
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) new DTP thread requester waiting\n")));
}
this->activation_cond_.wait ();
}
else
{
if (TAO_debug_level > 0)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT ("TAO (%P|%t) new DTP thread failed %p\n"),
ACE_TEXT ("ACE_Task_Base::activate")));
}
}
}
if (TAO_debug_level > 7)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) new DTP thread requester running\n")));
}
return result;
}
TAO_DTP_Thread_Pool::TAO_DTP_Thread_Pool (TAO_DTP_Thread_Pool_Manager &manager,
CORBA::ULong id,
TAO_DTP_Definition &def)
: manager_ (manager),
id_ (id),
shutdown_ (false),
definition_ (def),
threads_ (*this),
waiter_ (*this),
active_count_ (0),
new_thread_generator_ (*this),
lock_ (),
activation_lock_ (),
activation_cond_ (activation_lock_),
termination_lock_ (),
termination_cond_ (termination_lock_)
{
manager_.orb_core ().leader_follower ().set_new_leader_generator (
&new_thread_generator_);
}
void
TAO_DTP_Thread_Pool::open (void)
{
// Nothing to do for now
}
TAO_DTP_Thread_Pool::~TAO_DTP_Thread_Pool (void)
{
}
void
TAO_DTP_Thread_Pool::shutting_down (void)
{
ACE_GUARD (TAO_SYNCH_MUTEX,
mon,
this->lock_);
// We are shutting down, this way we are not creating any more new dynamic
// threads
this->shutdown_ = true;
}
void
TAO_DTP_Thread_Pool::wait (void)
{
this->waiter_.wait ();
}
#define TAO_THREAD_POOL_MANAGER_GUARD \
ACE_GUARD_THROW_EX ( \
TAO_SYNCH_MUTEX, \
mon, \
this->lock_, \
CORBA::INTERNAL ( \
CORBA::SystemException::_tao_minor_code ( \
TAO_GUARD_FAILURE, \
0), \
CORBA::COMPLETED_NO));
TAO_DTP_Thread_Pool_Manager::TAO_DTP_Thread_Pool_Manager (TAO_ORB_Core &orb_core)
: orb_core_ (orb_core),
thread_pools_ (),
thread_pool_id_counter_ (1),
lock_ ()
{
}
TAO_DTP_Thread_Pool_Manager::~TAO_DTP_Thread_Pool_Manager (void)
{
// Delete all the pools.
for (THREAD_POOLS::ITERATOR iterator = this->thread_pools_.begin ();
iterator != this->thread_pools_.end ();
++iterator)
delete (*iterator).int_id_;
}
void
TAO_DTP_Thread_Pool_Manager::wait (void)
{
for (THREAD_POOLS::ITERATOR iterator = this->thread_pools_.begin ();
iterator != this->thread_pools_.end ();
++iterator)
(*iterator).int_id_->wait ();
}
CORBA::ULong
TAO_DTP_Thread_Pool_Manager::create_threadpool (TAO_DTP_Definition &def)
{
TAO_THREAD_POOL_MANAGER_GUARD;
return this->create_threadpool_i (def);
}
void
TAO_DTP_Thread_Pool_Manager::destroy_threadpool (CORBA::ULong threadpool)
{
TAO_DTP_Thread_Pool *tao_thread_pool = 0;
// The guard is just for the map, don't do a wait inside the guard, because
// during the wait other threads can try to access the thread pool manager
// also, this can be one of the threads we are waiting for, which then
// results in a deadlock
{
TAO_THREAD_POOL_MANAGER_GUARD;
// Unbind the thread pool from the map.
int const result = this->thread_pools_.unbind (threadpool, tao_thread_pool);
// If the thread pool is not found in our map.
if (result != 0)
return; //throw RTCORBA::RTORB::InvalidThreadpool ();
}
// Mark the thread pool that we are shutting down.
tao_thread_pool->shutting_down ();
// Wait for the threads.
tao_thread_pool->wait ();
// Delete the thread pool.
delete tao_thread_pool;
}
CORBA::ULong
TAO_DTP_Thread_Pool_Manager::create_threadpool_i (TAO_DTP_Definition &def)
{
// Create the thread pool.
TAO_DTP_Thread_Pool *thread_pool = 0;
ACE_NEW_THROW_EX (thread_pool,
TAO_DTP_Thread_Pool (*this,
this->thread_pool_id_counter_,
def
),
CORBA::NO_MEMORY ());
return this->create_threadpool_helper (thread_pool);
}
CORBA::ULong
TAO_DTP_Thread_Pool_Manager::create_threadpool_helper (TAO_DTP_Thread_Pool *thread_pool)
{
// Make sure of safe deletion in case of errors.
std::unique_ptr<TAO_DTP_Thread_Pool> safe_thread_pool (thread_pool);
// Open the pool.
thread_pool->open ();
// Create the static threads.
int result = thread_pool->create_initial_threads ();
// Throw exception in case of errors.
if (result != 0)
{
throw ::CORBA::INTERNAL
(
CORBA::SystemException::_tao_minor_code
(
0, //TAO_RTCORBA_THREAD_CREATION_LOCATION_CODE,
errno),
CORBA::COMPLETED_NO);
}
// Bind thread to internal table.
result = this->thread_pools_.bind (this->thread_pool_id_counter_, thread_pool);
TAO_ORB_Core_TSS_Resources &tss =
*this->orb_core_.get_tss_resources ();
// Associate the thread pool with the ORB for later retrieval
tss.lane_ = thread_pool;
//
// Throw exception in case of errors.
if (result != 0)
throw ::CORBA::INTERNAL ();
//
// Success.
//
// No need to delete thread pool.
safe_thread_pool.release ();
// Return current counter and perform post-increment.
return this->thread_pool_id_counter_++;
}
TAO_ORB_Core &
TAO_DTP_Thread_Pool_Manager::orb_core () const
{
return this->orb_core_;
}
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_HAS_CORBA_MESSAGING && TAO_HAS_CORBA_MESSAGING != 0 */
|