root/trunk/src/game/WorldSocketMgr.cpp @ 149

/*
* Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
*
* Copyright (C) 2008 Trinity <http://www.trinitycore.org/>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

/** \file WorldSocketMgr.cpp
*  \ingroup u2w
*  \author Derex <derex101@gmail.com>
*/

#include "WorldSocketMgr.h"

#include <ace/ACE.h>
#include <ace/Log_Msg.h>
#include <ace/Reactor.h>
#include <ace/Reactor_Impl.h>
#include <ace/TP_Reactor.h>
#include <ace/Dev_Poll_Reactor.h>
#include <ace/Guard_T.h>
#include <ace/Atomic_Op.h>
#include <ace/os_include/arpa/os_inet.h>
#include <ace/os_include/netinet/os_tcp.h>
#include <ace/os_include/sys/os_types.h>
#include <ace/os_include/sys/os_socket.h>

#include <set>

#include "Log.h"
#include "Common.h"
#include "Config/ConfigEnv.h"
#include "Database/DatabaseEnv.h"
#include "WorldSocket.h"

/** 
* This is a helper class to WorldSocketMgr ,that manages 
* network threads, and assigning connections from acceptor thread
* to other network threads
*/
class ReactorRunnable : protected ACE_Task_Base
{
public:

        ReactorRunnable () :
          m_ThreadId (-1),
                  m_Connections (0),
                  m_Reactor (0)
          {
                  ACE_Reactor_Impl* imp = 0;

#if defined (ACE_HAS_EVENT_POLL) || defined (ACE_HAS_DEV_POLL)

                  imp = new ACE_Dev_Poll_Reactor ();

                  imp->max_notify_iterations (128);
                  imp->restart (1);

#else

                  imp = new ACE_TP_Reactor ();
                  imp->max_notify_iterations (128);

#endif

                  m_Reactor = new ACE_Reactor (imp, 1);
          }

          virtual ~ReactorRunnable ()
          {
                  this->Stop ();
                  this->Wait ();

                  if (m_Reactor)
                          delete m_Reactor;
          }

          void Stop ()
          {
                  m_Reactor->end_reactor_event_loop ();
          }

          int Start ()
          {
                  if (m_ThreadId != -1)
                          return -1;

                  return (m_ThreadId = this->activate ());
          }

          void Wait ()
          {
                  ACE_Task_Base::wait ();
          }

          long Connections ()
          {
                  return static_cast<long> (m_Connections.value ());
          }

          int AddSocket (WorldSocket* sock)
          {
                  ACE_GUARD_RETURN (ACE_Thread_Mutex, Guard, m_NewSockets_Lock, -1);

                  ++m_Connections;
                  sock->AddReference();
                  sock->reactor (m_Reactor);
                  m_NewSockets.insert (sock);

                  return 0;
          }

          ACE_Reactor* GetReactor ()
          {
                  return m_Reactor;
          }

protected:

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

                if (m_NewSockets.empty ())
                        return;

                for (SocketSet::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 ();
        }

        virtual int svc (void)
        {
                DEBUG_LOG ("Network Thread Starting");

                WorldDatabase.ThreadStart ();

                ACE_ASSERT (m_Reactor);

                SocketSet::iterator i, t;

                while (!m_Reactor->reactor_event_loop_done ())
                {
                        // dont be too smart to move this outside the loop 
                        // the run_reactor_event_loop will modify interval
                        ACE_Time_Value interval (0, 10000);

                        if (m_Reactor->run_reactor_event_loop (interval) == -1)
                                break;

                        AddNewSockets ();

                        for (i = m_Sockets.begin (); i != m_Sockets.end ();)
                        {
                                if ((*i)->Update () == -1)
                                {
                                        t = i;
                                        i++;
                                        (*t)->CloseSocket ();
                                        (*t)->RemoveReference ();
                                        --m_Connections;
                                        m_Sockets.erase (t);
                                }
                                else
                                        i++;
                        }
                }

                WorldDatabase.ThreadEnd ();

                DEBUG_LOG ("Network Thread Exitting");

                return 0;
        }

private:
        typedef ACE_Atomic_Op<ACE_SYNCH_MUTEX, long> AtomicInt;
        typedef std::set<WorldSocket*> SocketSet;

        ACE_Reactor* m_Reactor;
        AtomicInt m_Connections;
        int m_ThreadId;

        SocketSet m_Sockets;

        SocketSet m_NewSockets;
        ACE_Thread_Mutex m_NewSockets_Lock;
};



WorldSocketMgr::WorldSocketMgr () :
m_NetThreadsCount (0),
m_NetThreads (0),
m_SockOutKBuff (-1),
m_SockOutUBuff (65536),
m_UseNoDelay (true),
m_Acceptor (0) {}

WorldSocketMgr::~WorldSocketMgr ()
{
        if (m_NetThreads)
                delete [] m_NetThreads;

        if(m_Acceptor)
                delete m_Acceptor;
}

int WorldSocketMgr::StartReactiveIO (ACE_UINT16 port, const char* address)
{
        m_UseNoDelay = sConfig.GetBoolDefault ("Network.TcpNodelay", true);

        int num_threads = sConfig.GetIntDefault ("Network.Threads", 1);

        if (num_threads <= 0)
        {
                sLog.outError ("Network.Threads is wrong in your config file");
                return -1;
        }

        m_NetThreadsCount = static_cast<size_t> (num_threads + 1);

        m_NetThreads = new ReactorRunnable[m_NetThreadsCount];

        sLog.outBasic ("Max alowed socket connections %d",ACE::max_handles ());

        m_SockOutKBuff = sConfig.GetIntDefault ("Network.OutKBuff", -1); // -1 means use default

        m_SockOutUBuff = sConfig.GetIntDefault ("Network.OutUBuff", 65536);

        if ( m_SockOutUBuff <= 0 )
        {
                sLog.outError ("Network.OutUBuff is wrong in your config file");
                return -1;
        }

        WorldSocket::Acceptor *acc = new WorldSocket::Acceptor;
        m_Acceptor = acc;

        ACE_INET_Addr listen_addr (port, address);

        if (acc->open (listen_addr, m_NetThreads[0].GetReactor (), ACE_NONBLOCK) == -1)
        {
                sLog.outError ("Failed to open acceptor ,check if the port is free");
                return -1;
        }

        for (size_t i = 0; i < m_NetThreadsCount; ++i)
                m_NetThreads[i].Start ();

        return 0;
}

int WorldSocketMgr::StartNetwork (ACE_UINT16 port, const char* address)
{
        if (!sLog.IsOutDebug ())
                ACE_Log_Msg::instance ()->priority_mask (LM_ERROR, ACE_Log_Msg::PROCESS);

        if (this->StartReactiveIO (port, address) == -1)
                return -1;

        return 0;
}

void WorldSocketMgr::StopNetwork ()
{
        if (m_Acceptor)
        {
                WorldSocket::Acceptor* acc = dynamic_cast<WorldSocket::Acceptor*> (m_Acceptor);

                if (acc)
                        acc->close ();
        }

        if (m_NetThreadsCount != 0)
        {
                for (size_t i = 0; i < m_NetThreadsCount; ++i)
                        m_NetThreads[i].Stop ();
        }

        this->Wait ();
}

void WorldSocketMgr::Wait ()
{
        if (m_NetThreadsCount != 0)
        {
                for (size_t i = 0; i < m_NetThreadsCount; ++i)
                        m_NetThreads[i].Wait ();
        }
}

int WorldSocketMgr::OnSocketOpen (WorldSocket* sock)
{
        // set some options here
        if (m_SockOutKBuff >= 0)
                if (sock->peer ().set_option (SOL_SOCKET,
                        SO_SNDBUF,
                        (void*) & m_SockOutKBuff,
                        sizeof (int)) == -1 && errno != ENOTSUP)
                {
                        sLog.outError ("WorldSocketMgr::OnSocketOpen set_option SO_SNDBUF");
                        return -1;
                }

                static const int ndoption = 1;

                // Set TCP_NODELAY.
                if (m_UseNoDelay)
                        if (sock->peer ().set_option (ACE_IPPROTO_TCP,
                                TCP_NODELAY,
                                (void*) & ndoption,
                                sizeof (int)) == -1)
                        {
                                sLog.outError ("WorldSocketMgr::OnSocketOpen: peer ().set_option TCP_NODELAY errno = %s", ACE_OS::strerror (errno));
                                return -1;
                        }

                        sock->m_OutBufferSize = static_cast<size_t> (m_SockOutUBuff);

                        // we skip the Acceptor Thread
                        size_t min = 1;

                        ACE_ASSERT (m_NetThreadsCount >= 1);

                        for (size_t i = 1; i < m_NetThreadsCount; ++i)
                                if (m_NetThreads[i].Connections () < m_NetThreads[min].Connections ())
                                        min = i;

                        return m_NetThreads[min].AddSocket (sock);
}

WorldSocketMgr* WorldSocketMgr::Instance ()
{
        return ACE_Singleton<WorldSocketMgr,ACE_Thread_Mutex>::instance();
}