src/client.cpp


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/*
Minetest-c55
Copyright (C) 2010 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 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "client.h"
#include "utility.h"
#include <iostream>
#include "clientserver.h"
#include "jmutexautolock.h"
#include "main.h"
#include <sstream>
#include "porting.h"

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

	DSTACK(__FUNCTION_NAME);
	
	BEGIN_DEBUG_EXCEPTION_HANDLER
	
	while(getRun())
	{
		m_client->asyncStep();

		//m_client->updateSomeExpiredMeshes();

		bool was = m_client->AsyncProcessData();

		if(was == false)
			sleep_ms(10);
	}

	END_DEBUG_EXCEPTION_HANDLER

	return NULL;
}

Client::Client(
		IrrlichtDevice *device,
		const char *playername,
		MapDrawControl &control):
	m_thread(this),
	m_env(new ClientMap(this, control,
			device->getSceneManager()->getRootSceneNode(),
			device->getSceneManager(), 666),
			dout_client),
	m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, this),
	m_device(device),
	camera_position(0,0,0),
	camera_direction(0,0,1),
	m_server_ser_ver(SER_FMT_VER_INVALID),
	m_step_dtime(0.0),
	m_inventory_updated(false),
	m_time_of_day(0)
{
	m_packetcounter_timer = 0.0;
	m_delete_unused_sectors_timer = 0.0;
	m_connection_reinit_timer = 0.0;
	m_avg_rtt_timer = 0.0;
	m_playerpos_send_timer = 0.0;

	//m_fetchblock_mutex.Init();
	m_incoming_queue_mutex.Init();
	m_env_mutex.Init();
	m_con_mutex.Init();
	m_step_dtime_mutex.Init();

	m_thread.Start();
	
	{
		JMutexAutoLock envlock(m_env_mutex);
		//m_env.getMap().StartUpdater();

		Player *player = new LocalPlayer();

		player->updateName(playername);

		/*f32 y = BS*2 + BS*20;
		player->setPosition(v3f(0, y, 0));*/
		//player->setPosition(v3f(0, y, 30900*BS)); // DEBUG
		m_env.addPlayer(player);
	}
}

Client::~Client()
{
	{
		JMutexAutoLock conlock(m_con_mutex);
		m_con.Disconnect();
	}

	m_thread.setRun(false);
	while(m_thread.IsRunning())
		sleep_ms(100);
}

void Client::connect(Address address)
{
	DSTACK(__FUNCTION_NAME);
	JMutexAutoLock lock(m_con_mutex);
	m_con.setTimeoutMs(0);
	m_con.Connect(address);
}

bool Client::connectedAndInitialized()
{
	JMutexAutoLock lock(m_con_mutex);

	if(m_con.Connected() == false)
		return false;
	
	if(m_server_ser_ver == SER_FMT_VER_INVALID)
		return false;
	
	return true;
}

void Client::step(float dtime)
{
	DSTACK(__FUNCTION_NAME);
	
	// Limit a bit
	if(dtime > 2.0)
		dtime = 2.0;
	
	
	//dstream<<"Client steps "<<dtime<<std::endl;

	{
		//TimeTaker timer("ReceiveAll()", m_device);
		// 0ms
		ReceiveAll();
	}
	
	{
		//TimeTaker timer("m_con_mutex + m_con.RunTimeouts()", m_device);
		// 0ms
		JMutexAutoLock lock(m_con_mutex);
		m_con.RunTimeouts(dtime);
	}

	/*
		Packet counter
	*/
	{
		float &counter = m_packetcounter_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			counter = 20.0;
			
			dout_client<<"Client packetcounter (20s):"<<std::endl;
			m_packetcounter.print(dout_client);
			m_packetcounter.clear();
		}
	}

	{
		/*
			Delete unused sectors

			NOTE: This jams the game for a while because deleting sectors
			      clear caches
		*/
		
		float &counter = m_delete_unused_sectors_timer;
		counter -= dtime;
		if(counter <= 0.0)
		{
			// 3 minute interval
			//counter = 180.0;
			counter = 60.0;

			JMutexAutoLock lock(m_env_mutex);

			core::list<v3s16> deleted_blocks;

			float delete_unused_sectors_timeout = 
				g_settings.getFloat("client_delete_unused_sectors_timeout");
	
			// Delete sector blocks
			/*u32 num = m_env.getMap().deleteUnusedSectors
					(delete_unused_sectors_timeout,
					true, &deleted_blocks);*/
			
			// Delete whole sectors
			u32 num = m_env.getMap().deleteUnusedSectors
					(delete_unused_sectors_timeout,
					false, &deleted_blocks);

			if(num > 0)
			{
				/*dstream<<DTIME<<"Client: Deleted blocks of "<<num
						<<" unused sectors"<<std::endl;*/
				dstream<<DTIME<<"Client: Deleted "<<num
						<<" unused sectors"<<std::endl;
				
				/*
					Send info to server
				*/

				// Env is locked so con can be locked.
				JMutexAutoLock lock(m_con_mutex);
				
				core::list<v3s16>::Iterator i = deleted_blocks.begin();
				core::list<v3s16> sendlist;
				for(;;)
				{
					if(sendlist.size() == 255 || i == deleted_blocks.end())
					{
						if(sendlist.size() == 0)
							break;