server.cpp

/*
Minetest-c55
Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "server.h"
#include <iostream>
#include <queue>
#include "clientserver.h"
#include "map.h"
#include "jmutexautolock.h"
#include "main.h"
#include "constants.h"
#include "voxel.h"
#include "config.h"
#include "filesys.h"
#include "mapblock.h"
#include "serverobject.h"
#include "settings.h"
#include "profiler.h"
#include "log.h"
#include "script.h"
#include "scriptapi.h"
#include "nodedef.h"
#include "itemdef.h"
#include "craftdef.h"
#include "mapgen.h"
#include "content_mapnode.h"
#include "content_nodemeta.h"
#include "content_abm.h"
#include "content_sao.h"
#include "mods.h"
#include "sha1.h"
#include "base64.h"
#include "tool.h"
#include "sound.h" // dummySoundManager
#include "event_manager.h"
#include "hex.h"
#include "util/string.h"
#include "util/pointedthing.h"
#include "util/mathconstants.h"
#include "rollback.h"
#include "util/serialize.h"

#define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"

#define BLOCK_EMERGE_FLAG_FROMDISK (1<<0)

class MapEditEventIgnorer
{
public:
	MapEditEventIgnorer(bool *flag):
		m_flag(flag)
	{
		if(*m_flag == false)
			*m_flag = true;
		else
			m_flag = NULL;
	}

	~MapEditEventIgnorer()
	{
		if(m_flag)
		{
			assert(*m_flag);
			*m_flag = false;
		}
	}
	
private:
	bool *m_flag;
};

class MapEditEventAreaIgnorer
{
public:
	MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
		m_ignorevariable(ignorevariable)
	{
		if(m_ignorevariable->getVolume() == 0)
			*m_ignorevariable = a;
		else
			m_ignorevariable = NULL;
	}

	~MapEditEventAreaIgnorer()
	{
		if(m_ignorevariable)
		{
			assert(m_ignorevariable->getVolume() != 0);
			*m_ignorevariable = VoxelArea();
		}
	}
	
private:
	VoxelArea *m_ignorevariable;
};

void * ServerThread::Thread()
{
	ThreadStarted();

	log_register_thread("ServerThread");

	DSTACK(__FUNCTION_NAME);

	BEGIN_DEBUG_EXCEPTION_HANDLER

	while(getRun())
	{
		try{
			//TimeTaker timer("AsyncRunStep() + Receive()");

			{
				//TimeTaker timer("AsyncRunStep()");
				m_server->AsyncRunStep();
			}
		
			//infostream<<"Running m_server->Receive()"<<std::endl;
			m_server->Receive();
		}
		catch(con::NoIncomingDataException &e)
		{
		}
		catch(con::PeerNotFoundException &e)
		{
			infostream<<"Server: PeerNotFoundException"<<std::endl;
		}
		catch(con::ConnectionBindFailed &e)
		{
			m_server->setAsyncFatalError(e.what());
		}
		catch(LuaError &e)
		{
			m_server->setAsyncFatalError(e.what());
		}
	}
	
	END_DEBUG_EXCEPTION_HANDLER(errorstream)

	return NULL;
}

void * EmergeThread::Thread()
{
	ThreadStarted();

	log_register_thread("EmergeThread");

	DSTACK(__FUNCTION_NAME);

	BEGIN_DEBUG_EXCEPTION_HANDLER

	bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");

	v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
	
	/*
		Get block info from queue, emerge them and send them
		to clients.

		After queue is empty, exit.
	*/
	while(getRun())
	try{
		QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
		if(qptr == NULL)
			break;
		
		SharedPtr<QueuedBlockEmerge> q(qptr);

		v3s16 &p = q->pos;
		v2s16 p2d(p.X,p.Z);
		
		last_tried_pos = p;

		/*
			Do not generate over-limit
		*/
		if(blockpos_over_limit(p))
			continue;
			
		//infostream<<"EmergeThread::Thread(): running"<<std::endl;

		//TimeTaker timer("block emerge");