/*
 * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
 *
 * 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
 */

#include <ace/Singleton.h>
#include <ace/Thread_Mutex.h>
#include <ace/Log_Msg.h>

#include "DelayExecutor.h"

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

DelayExecutor::DelayExecutor()
 : activated_(false), pre_svc_hook_(0), post_svc_hook_(0)
{
}

DelayExecutor::~DelayExecutor()
{
 if (pre_svc_hook_)
 delete pre_svc_hook_;

 if (post_svc_hook_)
 delete post_svc_hook_;

 deactivate();
}

int DelayExecutor::deactivate()
{
 if (!activated())
 return -1;

 activated(false);
 queue_.queue()->deactivate();
 wait();

 return 0;
}

int DelayExecutor::svc()
{
 if (pre_svc_hook_)
 pre_svc_hook_->call();

 for (;;)
 {
 ACE_Method_Request* rq = queue_.dequeue();

 if (!rq)
 break;

 rq->call();
 delete rq;
 }

 if (post_svc_hook_)
 post_svc_hook_->call();

 return 0;
}

int DelayExecutor::activate(int num_threads, ACE_Method_Request* pre_svc_hook, ACE_Method_Request* post_svc_hook)
{
 if (activated())
 return -1;

 if (num_threads < 1)
 return -1;

 if (pre_svc_hook_)
 delete pre_svc_hook_;

 if (post_svc_hook_)
 delete post_svc_hook_;

 pre_svc_hook_ = pre_svc_hook;
 post_svc_hook_ = post_svc_hook;

 queue_.queue()->activate();

 if (ACE_Task_Base::activate(THR_NEW_LWP | THR_JOINABLE | THR_INHERIT_SCHED, num_threads) == -1)
 return -1;

 activated(true);

 return true;
}

int DelayExecutor::execute(ACE_Method_Request* new_req)
{
 if (new_req == NULL)
 return -1;

 if (queue_.enqueue(new_req, (ACE_Time_Value*)&ACE_Time_Value::zero) == -1)
 {
 delete new_req;
 ACE_ERROR_RETURN((LM_ERROR, ACE_TEXT("(%t) %p\n"), ACE_TEXT("DelayExecutor::execute enqueue")), -1);
 }

 return 0;
}

bool DelayExecutor::activated()
{
 return activated_;
}

void DelayExecutor::activated(bool s)
{
 activated_ = s;
}