C++ ACE_GUARD函數代碼示例

        void AddNewSockets()
        {
            ACE_GUARD(ACE_Thread_Mutex, Guard, m_NewSockets_Lock);

            if (m_NewSockets.empty())
                return;

            for (SocketSet::const_iterator i = m_NewSockets.begin(); i != m_NewSockets.end(); ++i)
            {
                WorldSocket* sock = (*i);

                if (sock->IsClosed())
                {
                    sock->RemoveReference();
                    --m_Connections;
                }
                else
                    m_Sockets.insert(sock);
            }

            m_NewSockets.clear();
        }

void
Client_Service_Handler::handle_write_stream (
  const ACE_Asynch_Write_Stream::Result &result)
{
  ACE_GUARD (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->mtx_);

  this->pending_writes_--;

  if (!result.success () || 0 == result.bytes_transferred ())
  {
    // Error

    result.message_block ().release ();

    ACE_DEBUG ((LM_DEBUG, ACE_TEXT (
      "Client_Service_Handler::handle_write_stream: error: %d\n"),
      result.error ()));

    this->cancel_and_close ();
  }
  else if (result.bytes_transferred () < result.bytes_to_write ())
  {
    // More to write...

    if (this->write (result.message_block(),
      result.bytes_to_write () - result.bytes_transferred ()) < 0)
    {
      result.message_block ().release ();

      this->cancel_and_close ();
    }
  }
  else
  {
    // Wrote it all

    result.message_block ().release ();
  }
}

void ObjectAccessor::RemoveCorpse(Corpse* corpse)
{
    ASSERT(corpse && corpse->GetType() != CORPSE_BONES);

    //TODO: more works need to be done for corpse and other world object
    if (Map* map = corpse->FindMap())
    {
        corpse->DestroyForNearbyPlayers();
        if (corpse->IsInGrid())
            map->Remove(corpse, false);
        else
        {
            corpse->RemoveFromWorld();
            corpse->ResetMap();
        }
    }
    else
        corpse->RemoveFromWorld();

    // Critical section
    {
        //TRINITY_WRITE_GUARD(ACE_RW_Thread_Mutex, i_corpseLock);
		ACE_GUARD(LockType, g, i_corpseGuard);

        Player2CorpsesMapType::iterator iter = i_player2corpse.find(corpse->GetOwnerGUID());
        if (iter == i_player2corpse.end()) // TODO: Fix this
            return;

		CellPair cell_pair = Trinity::ComputeCellPair(corpse->GetPositionX(), corpse->GetPositionY());
		uint32 cell_id = (cell_pair.y_coord * TOTAL_NUMBER_OF_CELLS_PER_MAP) + cell_pair.x_coord;
        // build mapid*cellid -> guid_set map
        CellCoord cellCoord = Trinity::ComputeCellCoord(corpse->GetPositionX(), corpse->GetPositionY());
        // sObjectMgr->DeleteCorpseCellData(corpse->GetMapId(), cellCoord.GetId(), GUID_LOPART(corpse->GetOwnerGUID()));
		sObjectMgr->DeleteCorpseCellData(corpse->GetMapId(), cell_id, GUID_LOPART(corpse->GetOwnerGUID()));
		
        i_player2corpse.erase(iter);
    }
}

void
LiveEntry::status (LiveStatus l)
{
  {
    ACE_GUARD (TAO_SYNCH_MUTEX, mon, this->lock_);
    this->liveliness_ = l;
    if (l == LS_ALIVE)
      {
        ACE_Time_Value now (ACE_High_Res_Timer::gettimeofday_hr());
        this->next_check_ = now + owner_->ping_interval();
      }
    if (l == LS_TRANSIENT && !this->reping_available())
      {
        this->liveliness_ = LS_LAST_TRANSIENT;
      }
  }
  this->update_listeners ();

  if (this->listeners_.size() > 0)
    {
      if (ImR_Locator_i::debug () > 2)
        {
          ORBSVCS_DEBUG ((LM_DEBUG,
                          ACE_TEXT ("(%P|%t) LiveEntry::status change, ")
                          ACE_TEXT ("server = %C status = %s\n"),
                          this->server_.c_str(),
                          status_name (this->liveliness_)));
        }
      this->owner_->schedule_ping (this);
    }
  else
    {
      if (this->owner_->remove_per_client_entry (this))
        {
          delete (this);
        }
    }
}

void
TAO_Object_Adapter::close (int wait_for_completion)
{
  this->check_close (wait_for_completion);

  // Shutting down the ORB causes all object adapters to be destroyed,
  // since they cannot exist in the absence of an ORB. Shut down is
  // complete when all ORB processing (including request processing
  // and object deactivation or other operations associated with
  // object adapters) has completed and the object adapters have been
  // destroyed. In the case of the POA, this means that all object
  // etherealizations have finished and root POA has been destroyed
  // (implying that all descendent POAs have also been destroyed).
  TAO_Root_POA *root = 0;
#if (TAO_HAS_MINIMUM_POA == 0) && !defined (CORBA_E_COMPACT) && !defined (CORBA_E_MICRO)
  TAO_POAManager_Factory* factory = 0;
#endif
  {
    ACE_GUARD (ACE_Lock, ace_mon, this->lock ());
    if (this->root_ == 0)
      return;
    root = this->root_;
    this->root_ = 0;

#if (TAO_HAS_MINIMUM_POA == 0) && !defined (CORBA_E_COMPACT) && !defined (CORBA_E_MICRO)
    if (this->poa_manager_factory_ == 0)
      return;
    factory = this->poa_manager_factory_;
    this->poa_manager_factory_ = 0;
#endif
  }
  CORBA::Boolean etherealize_objects = true;
  root->destroy (etherealize_objects, wait_for_completion);
  ::CORBA::release (root);
#if (TAO_HAS_MINIMUM_POA == 0) && !defined (CORBA_E_COMPACT) && !defined (CORBA_E_MICRO)
  release_poa_manager_factory (factory);
#endif
}

void ObjectAccessor::Update(uint32 /*diff*/) {
	UpdateDataMapType update_players;

	// Critical section
	{
		ACE_GUARD(LockType, g, i_updateGuard);

		while (!i_objects.empty()) {
			Object* obj = *i_objects.begin();
			ASSERT(obj && obj->IsInWorld());
			i_objects.erase(i_objects.begin());
			obj->BuildUpdate(update_players);
		}
	}

	WorldPacket packet; // here we allocate a std::vector with a size of 0x10000
	for (UpdateDataMapType::iterator iter = update_players.begin();
			iter != update_players.end(); ++iter) {
		iter->second.BuildPacket(&packet);
		iter->first->GetSession()->SendPacket(&packet);
		packet.clear(); // clean the string
	}
}

void
CC_LockSet::unlock (CosConcurrencyControl::lock_mode mode)
{
  ORBSVCS_DEBUG ((LM_DEBUG,
              "CC_LockSet::unlock\n"));

  CC_LockModeEnum lm = lmconvert (mode);

  ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, this->mlock_);

  if (lock_[lm] == 0) // This lock is not held.
    throw CosConcurrencyControl::LockNotHeld();
  else
    lock_[lm]--;

  // If we do not have a lock held in a weaker mode than the
  // strongest held and we have requests on the semaphore signal
  // the semaphore.
  while (lock_queue_.size () > 0)
    {
      CC_LockModeEnum lock_on_queue = CC_EM;

      lock_queue_.dequeue_head (lock_on_queue);

      if (compatible (lock_on_queue) == 1)
        {
          if (semaphore_.release () == -1)
            throw CORBA::INTERNAL ();
          lock_[lock_on_queue]++;
        }
      else
        {
          lock_queue_.enqueue_head (lock_on_queue);
          break;
        }
    }
  this->dump ();
}

void P3LeafMesh::createRemoteService(const SAPInfo* hint, const UUIDPtr& uuid, const UUIDPtr& sid, ServiceParamsPtr& params, UUIDPtr& iid) throw (ServiceException&) {
    ACE_GUARD(ACE_SYNCH_RECURSIVE_MUTEX, ace_mon, m_lock);
    if (hint == 0) {
        throw ServiceException(ServiceException::SERVICE_WITHOUT_IMPL);
    }
    Endpoint endpoint;
    ACE_Connector<P3MeshClientHandler, ACE_SOCK_Connector> connector;
    hint->getFirstEndpoint(endpoint);
    QoSEndpoint qosE = *(endpoint.getQoS());
    UUIDPtr runtimeUUID;
    getUUID(runtimeUUID);
    UUIDPtr fid;
    getFID(fid);
    P3MeshClientHandler* clientHandler = new P3MeshClientHandler(
            runtimeUUID,
            fid,
            qosE,
            false, false, 0, 0, 0, 0);

    if (connector.connect(clientHandler, endpoint.getAddr()) == -1) {
        ACE_ERROR((LM_ERROR, ACE_TEXT("(%T)%@\n"),
                ACE_TEXT("(%T)ERROR: P3Mesh::createRemoteService - connect failed:")));
        clientHandler->close();
        clientHandler = 0;
        delete clientHandler;
    } else {
        ACE_DEBUG((LM_DEBUG, ACE_TEXT("(%t|%T)INFO: P3LeafMesh::createRemoteService - Connect OK!\n")));
    }

    int ret = clientHandler->createService(params, iid);
    clientHandler->close();
    delete clientHandler;
    if (ret == -1) {
        ACE_DEBUG((LM_DEBUG, ACE_TEXT("(%t|%T)INFO: P3LeafMesh::createRemoteService - failed to create, not enough resources\n")));
        throw ServiceException(ServiceException::INSUFFICIENT_RESOURCES);
    }
    ACE_DEBUG((LM_DEBUG, ACE_TEXT("(%t|%T)INFO: P3LeafMesh::createRemoteService - service created!\n")));
}

void
TAO_CEC_MT_Dispatching::activate (void)
{
  ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, this->lock_);

  if (this->active_ != 0)
    return;

  this->active_ = 1;

  if (this->task_.activate (this->thread_creation_flags_,
                            this->nthreads_,
                            1,
                            this->thread_priority_) == -1)
    {
      if (this->force_activate_ != 0)
        {
          if (this->task_.activate (THR_BOUND, this->nthreads_) == -1)
            ORBSVCS_ERROR ((LM_ERROR,
                        "EC (%P|%t) cannot activate dispatching queue"));
        }
    }
}

template <class ACE_LOCK, class ALLOCATOR> void
ACE_Timeprobe_Ex<ACE_LOCK, ALLOCATOR>::timeprobe (u_long event)
{
  ACE_GUARD (ACE_LOCK, ace_mon, this->lock_);

  this->timeprobes_[this->current_size_].event_.event_number_ = event;
  this->timeprobes_[this->current_size_].event_type_ = ACE_timeprobe_t::NUMBER;
  this->timeprobes_[this->current_size_].time_ = ACE_OS::gethrtime ();
  this->timeprobes_[this->current_size_].thread_ = ACE_OS::thr_self ();

  ++this->current_size_;

#if !defined (ACE_TIMEPROBE_ASSERTS_FIXED_SIZE)
  // wrap around to the beginning on overflow
  if (this->current_size_ >= this->max_size_)
    {
      this->current_size_ = 0;
      this->report_buffer_full_ = 1;
    }
#endif /* ACE_TIMEPROBE_ASSERTS_FIXED_SIZE */

  ACE_ASSERT (this->current_size_ < this->max_size_);
}

void
TAO_Notify_ThreadPool_Supplier::subscription_change (const CosNotification::EventTypeSeq & added,
                                      const CosNotification::EventTypeSeq & /*removed */
                                      )
{
  ACE_GUARD (TAO_SYNCH_MUTEX, mon, this->lock_);

  // Count the number of consumers connect and signal the supplier thread when the expected count have connected.
  // Only 1 consumer connects at a time.
  if (added.length () > 0)
    {
      // Set the domain and type nams in the event's fixed header.
      this->event_[consumer_count_].header.fixed_header.event_type.domain_name = CORBA::string_dup(added[0].domain_name);
      this->event_[consumer_count_].header.fixed_header.event_type.type_name = CORBA::string_dup(added[0].type_name);

      ++this->consumer_count_;

      ACE_DEBUG ((LM_DEBUG, "(%P,%t) Received Type %d: (%s)\n", this->consumer_count_, added[0].type_name.in ()));

      if (this->consumer_count_ == this->expected_consumer_count_)
        this->consumers_connected_.signal ();
    }
}

void
Client_Service_Handler::open (ACE_HANDLE h, ACE_Message_Block&)
{
  ACE_GUARD (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->mtx_);

  if (this->ssl_stream_.open (*this, h, 0, this->proactor ()) != 0)
  {
    ACE_DEBUG ((LM_DEBUG, ACE_TEXT (
      "Client_Service_Handler::open: ACE_SSL_Asynch_Stream::open failed, %d\n"),
      (int)errno));
    this->cancel_and_close ();
  }
  else
  {
    ACE_Message_Block *mb = 0;
    ACE_NEW_NORETURN(mb, ACE_Message_Block (DATA_SIZE));

    if (this->read_data () < 0 || this->write_data () < 0)
    {
      this->cancel_and_close ();
    }
  }
}

TAO_CEC_ProxyPushConsumer_Guard::
    ~TAO_CEC_ProxyPushConsumer_Guard (void)
{
  // This access is safe because guard objects are created on the
  // stack, only one thread has access to them
  if (!this->locked_)
    return;

  {
    ACE_GUARD (ACE_Lock, ace_mon, *this->lock_);
    // If the guard fails there is not much we can do, raising an
    // exception is wrong, the client has *no* way to handle that kind
    // of error.  Even worse, there is no exception to raise in that
    // case.
    // @@ Returning something won't work either, the error should be
    // logged though!

    --this->refcount_;
    if (this->refcount_ != 0)
      return;
  }
  this->event_channel_->destroy_proxy (this->proxy_);
}

    void ConnectionCache::close_all_connections()
      {
        INET_TRACE ("ConnectionCache::close_all_connections");

        ACE_MT (ACE_GUARD (ACE_SYNCH_MUTEX,
                           guard_,
                           this->lock_));

        map_iter_type iter = this->cache_map_.end ();
        for (iter = this->cache_map_.begin ();
             iter != this->cache_map_.end ();
             ++iter)
          {
            if ((*iter).int_id_.state () == ConnectionCacheValue::CST_CLOSED)
              {
                connection_type* conn = (*iter).int_id_.connection ();
                (*iter).int_id_.connection (0);
                (*iter).int_id_.state (ConnectionCacheValue::CST_CLOSED);
                delete conn;
              }
          }
        this->cache_map_.unbind_all ();
      }

void WorldLog::outLog(char const *fmt, ...) {
	if (LogWorld()) {
		ACE_GUARD(ACE_Thread_Mutex, Guard, Lock);
		ASSERT(i_file);

		va_list args;
		va_start(args, fmt);
		vfprintf(i_file, fmt, args);
		//fprintf(i_file, "\n");
		va_end(args);

		fflush(i_file);
	}

	if (sLog->GetLogDB() && m_dbWorld) {
		va_list ap2;
		va_start(ap2, fmt);
		char nnew_str[MAX_QUERY_LEN];
		vsnprintf(nnew_str, MAX_QUERY_LEN, fmt, ap2);
		sLog->outDB(LOG_TYPE_WORLD, nnew_str);
		va_end(ap2);
	}
}