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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.
*/

#ifndef EXCEPTIONS_HEADER
#define EXCEPTIONS_HEADER

#include <exception>

class BaseException : public std::exception
{
public:
	BaseException(const char *s)
	{
		m_s = s;
	}
	virtual const char * what() const throw()
	{
		return m_s;
	}
	const char *m_s;
};

class AsyncQueuedException : public BaseException
{
public:
	AsyncQueuedException(const char *s):
		BaseException(s)
	{}
};

class NotImplementedException : public BaseException
{
public:
	NotImplementedException(const char *s):
		BaseException(s)
	{}
};

class AlreadyExistsException : public BaseException
{
public:
	AlreadyExistsException(const char *s):
		BaseException(s)
	{}
};

class VersionMismatchException : public BaseException
{
public:
	VersionMismatchException(const char *s):
		BaseException(s)
	{}
};

class FileNotGoodException : public BaseException
{
public:
	FileNotGoodException(const char *s):
		BaseException(s)
	{}
};

class SerializationError : public BaseException
{
public:
	SerializationError(const char *s):
		BaseException(s)
	{}
};

class LoadError : public BaseException
{
public:
	LoadError(const char *s):
		BaseException(s)
	{}
};

class ContainerFullException : public BaseException
{
public:
	ContainerFullException(const char *s):
		BaseException(s)
	{}
};

class SettingNotFoundException : public BaseException
{
public:
	SettingNotFoundException(const char *s):
		BaseException(s)
	{}
};

class InvalidFilenameException : public BaseException
{
public:
	InvalidFilenameException(const char *s):
		BaseException(s)
	{}
};

class ProcessingLimitException : public BaseException
{
public:
	ProcessingLimitException(const char *s):
		BaseException(s)
	{}
};

class CommandLineError : public BaseException
{
public:
	CommandLineError(const char *s):
		BaseException(s)
	{}
};

class ItemNotFoundException : public BaseException
{
public:
	ItemNotFoundException(const char *s):
		BaseException(s)
	{}
};

/*
	Some "old-style" interrupts:
*/

class InvalidPositionException : public BaseException
{
public:
	InvalidPositionException():
		BaseException("Somebody tried to get/set something in a nonexistent position.")
	{}
	InvalidPositionException(const char *s):
		BaseException(s)
	{}
};

class TargetInexistentException : public std::exception
{
	virtual const char * what() const throw()
	{
		return "Somebody tried to refer to something that doesn't exist.";
	}
};

class NullPointerException : public std::exception
{
	virtual const char * what() const throw()
	{
		return "NullPointerException";
	}
};

#endif

ps">"biome.h" #include "emerge.h" #include "mapgen_v6.h" /////////////////////////////// Emerge Manager //////////////////////////////// EmergeManager::EmergeManager(IGameDef *gamedef, BiomeDefManager *bdef) { //register built-in mapgens registerMapgen("v6", new MapgenFactoryV6()); this->biomedef = bdef ? bdef : new BiomeDefManager(gamedef); this->params = NULL; mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info"); queuemutex.Init(); int nthreads; if (g_settings->get("num_emerge_threads").empty()) { int nprocs = porting::getNumberOfProcessors(); // leave a proc for the main thread and one for some other misc threads nthreads = (nprocs > 2) ? nprocs - 2 : 1; } else { nthreads = g_settings->getU16("num_emerge_threads"); } if (nthreads < 1) nthreads = 1; qlimit_total = g_settings->getU16("emergequeue_limit_total"); qlimit_diskonly = g_settings->get("emergequeue_limit_diskonly").empty() ? nthreads * 5 + 1 : g_settings->getU16("emergequeue_limit_diskonly"); qlimit_generate = g_settings->get("emergequeue_limit_generate").empty() ? nthreads + 1 : g_settings->getU16("emergequeue_limit_generate"); for (int i = 0; i != nthreads; i++) emergethread.push_back(new EmergeThread((Server *)gamedef, i)); infostream << "EmergeManager: using " << nthreads << " threads" << std::endl; } EmergeManager::~EmergeManager() { for (unsigned int i = 0; i != emergethread.size(); i++) { emergethread[i]->setRun(false); emergethread[i]->qevent.signal(); emergethread[i]->stop(); delete emergethread[i]; delete mapgen[i]; } delete biomedef; delete params; } void EmergeManager::initMapgens(MapgenParams *mgparams) { Mapgen *mg; if (mapgen.size()) return; this->params = mgparams; for (unsigned int i = 0; i != emergethread.size(); i++) { mg = createMapgen(params->mg_name, 0, params); if (!mg) { infostream << "EmergeManager: falling back to mapgen v6" << std::endl; delete params; params = createMapgenParams("v6"); mg = createMapgen("v6", 0, params); } mapgen.push_back(mg); } } bool EmergeManager::enqueueBlockEmerge(u16 peer_id, v3s16 p, bool allow_generate) { std::map<v3s16, BlockEmergeData *>::const_iterator iter; BlockEmergeData *bedata; u16 count; u8 flags = 0; int idx = 0; if (allow_generate) flags |= BLOCK_EMERGE_ALLOWGEN; { JMutexAutoLock queuelock(queuemutex); count = blocks_enqueued.size(); if (count >= qlimit_total) return false; count = peer_queue_count[peer_id]; u16 qlimit_peer = allow_generate ? qlimit_generate : qlimit_diskonly; if (count >= qlimit_peer) return false; iter = blocks_enqueued.find(p); if (iter != blocks_enqueued.end()) { bedata = iter->second; bedata->flags |= flags; return true; } bedata = new BlockEmergeData; bedata->flags = flags; bedata->peer_requested = peer_id; blocks_enqueued.insert(std::make_pair(p, bedata)); peer_queue_count[peer_id] = count + 1; // insert into the EmergeThread queue with the least items int lowestitems = emergethread[0]->blockqueue.size(); for (unsigned int i = 1; i != emergethread.size(); i++) { int nitems = emergethread[i]->blockqueue.size(); if (nitems < lowestitems) { idx = i; lowestitems = nitems; } } emergethread[idx]->blockqueue.push(p); } emergethread[idx]->qevent.signal(); return true; } int EmergeManager::getGroundLevelAtPoint(v2s16 p) { if (mapgen.size() == 0 || !mapgen[0]) { errorstream << "EmergeManager: getGroundLevelAtPoint() called" " before mapgen initialized" << std::endl; return 0; } return mapgen[0]->getGroundLevelAtPoint(p); } bool EmergeManager::isBlockUnderground(v3s16 blockpos) { /* v2s16 p = v2s16((blockpos.X * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2, (blockpos.Y * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2); int ground_level = getGroundLevelAtPoint(p); return blockpos.Y * (MAP_BLOCKSIZE + 1) <= min(water_level, ground_level); */ //yuck, but then again, should i bother being accurate? //the height of the nodes in a single block is quite variable return blockpos.Y * (MAP_BLOCKSIZE + 1) <= params->water_level; } u32 EmergeManager::getBlockSeed(v3s16 p) { return (u32)(params->seed & 0xFFFFFFFF) + p.Z * 38134234 + p.Y * 42123 + p.X * 23; } Mapgen *EmergeManager::createMapgen(std::string mgname, int mgid, MapgenParams *mgparams) { std::map<std::string, MapgenFactory *>::const_iterator iter; iter = mglist.find(mgname); if (iter == mglist.end()) { errorstream << "EmergeManager; mapgen " << mgname << " not registered" << std::endl; return NULL; } MapgenFactory *mgfactory = iter->second; return mgfactory->createMapgen(mgid, mgparams, this); } MapgenParams *EmergeManager::createMapgenParams(std::string mgname) { std::map<std::string, MapgenFactory *>::const_iterator iter; iter = mglist.find(mgname); if (iter == mglist.end()) { errorstream << "EmergeManager: mapgen " << mgname << " not registered" << std::endl; return NULL; } MapgenFactory *mgfactory = iter->second; return mgfactory->createMapgenParams(); } MapgenParams *EmergeManager::getParamsFromSettings(Settings *settings) { std::string mg_name = settings->get("mg_name"); MapgenParams *mgparams = createMapgenParams(mg_name); mgparams->mg_name = mg_name; mgparams->seed = settings->getU64(settings == g_settings ? "fixed_map_seed" : "seed"); mgparams->water_level = settings->getS16("water_level"); mgparams->chunksize = settings->getS16("chunksize"); mgparams->flags = settings->getFlagStr("mg_flags", flagdesc_mapgen); if (!mgparams->readParams(settings)) { delete mgparams; return NULL; } return mgparams; } void EmergeManager::setParamsToSettings(Settings *settings) { settings->set("mg_name", params->mg_name); settings->setU64("seed", params->seed); settings->setS16("water_level", params->water_level); settings->setS16("chunksize", params->chunksize); settings->setFlagStr("mg_flags", params->flags, flagdesc_mapgen); params->writeParams(settings); } void EmergeManager::registerMapgen(std::string mgname, MapgenFactory *mgfactory) { mglist.insert(std::make_pair(mgname, mgfactory)); infostream << "EmergeManager: registered mapgen " << mgname << std::endl; } ////////////////////////////// Emerge Thread ////////////////////////////////// bool EmergeThread::popBlockEmerge(v3s16 *pos, u8 *flags) { std::map<v3s16, BlockEmergeData *>::iterator iter; JMutexAutoLock queuelock(emerge->queuemutex); if (blockqueue.empty()) return false; v3s16 p = blockqueue.front(); blockqueue.pop(); *pos = p; iter = emerge->blocks_enqueued.find(p); if (iter == emerge->blocks_enqueued.end()) return false; //uh oh, queue and map out of sync!! BlockEmergeData *bedata = iter->second; *flags = bedata->flags; emerge->peer_queue_count[bedata->peer_requested]--; delete bedata; emerge->blocks_enqueued.erase(iter); return true; } bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b, BlockMakeData *data, bool allow_gen) { v2s16 p2d(p.X, p.Z); //envlock: usually takes <=1ms, sometimes 90ms or ~400ms to acquire JMutexAutoLock envlock(m_server->m_env_mutex); // Load sector if it isn't loaded if (map->getSectorNoGenerateNoEx(p2d) == NULL) map->loadSectorMeta(p2d); // Attempt to load block MapBlock *block = map->getBlockNoCreateNoEx(p); if (!block || block->isDummy() || !block->isGenerated()) { EMERGE_DBG_OUT("not in memory, attempting to load from disk"); block = map->loadBlock(p); } // If could not load and allowed to generate, // start generation inside this same envlock if (allow_gen && (block == NULL || !block->isGenerated())) { EMERGE_DBG_OUT("generating"); *b = block; return map->initBlockMake(data, p); } *b = block; return false; } void *EmergeThread::Thread() { ThreadStarted(); log_register_thread("EmergeThread" + id); DSTACK(__FUNCTION_NAME); BEGIN_DEBUG_EXCEPTION_HANDLER v3s16 last_tried_pos(-32768,-32768,-32768); // For error output v3s16 p; u8 flags; map = (ServerMap *)&(m_server->m_env->getMap()); emerge = m_server->m_emerge; mapgen = emerge->mapgen[id]; enable_mapgen_debug_info = emerge->mapgen_debug_info; while (getRun()) try { if (!popBlockEmerge(&p, &flags)) { qevent.wait(); continue; } last_tried_pos = p; if (blockpos_over_limit(p)) continue; bool allow_generate = flags & BLOCK_EMERGE_ALLOWGEN; EMERGE_DBG_OUT("p=" PP(p) " allow_generate=" << allow_generate); /* Try to fetch block from memory or disk. If not found and asked to generate, initialize generator. */ BlockMakeData data; MapBlock *block = NULL; std::map<v3s16, MapBlock *> modified_blocks; if (getBlockOrStartGen(p, &block, &data, allow_generate)) { { ScopeProfiler sp(g_profiler, "EmergeThread: Mapgen::makeChunk", SPT_AVG); TimeTaker t("mapgen::make_block()"); mapgen->makeChunk(&data); if (enable_mapgen_debug_info == false) t.stop(true); // Hide output } { //envlock: usually 0ms, but can take either 30 or 400ms to acquire JMutexAutoLock envlock(m_server->m_env_mutex); ScopeProfiler sp(g_profiler, "EmergeThread: after " "Mapgen::makeChunk (envlock)", SPT_AVG); map->finishBlockMake(&data, modified_blocks); block = map->getBlockNoCreateNoEx(p); if (block) { /* Do some post-generate stuff */ v3s16 minp = data.blockpos_min * MAP_BLOCKSIZE; v3s16 maxp = data.blockpos_max * MAP_BLOCKSIZE + v3s16(1,1,1) * (MAP_BLOCKSIZE - 1); // Ignore map edit events, they will not need to be sent // to anybody because the block hasn't been sent to anybody MapEditEventAreaIgnorer ign(&m_server->m_ignore_map_edit_events_area, VoxelArea(minp, maxp)); { // takes about 90ms with -O1 on an e3-1230v2 scriptapi_environment_on_generated(m_server->m_lua, minp, maxp, emerge->getBlockSeed(minp)); } EMERGE_DBG_OUT("ended up with: " << analyze_block(block)); m_server->m_env->activateBlock(block, 0); } } } /* Set sent status of modified blocks on clients */ // NOTE: Server's clients are also behind the connection mutex //conlock: consistently takes 30-40ms to acquire JMutexAutoLock lock(m_server->m_con_mutex); // Add the originally fetched block to the modified list if (block) modified_blocks[p] = block; // Set the modified blocks unsent for all the clients for (std::map<u16, RemoteClient*>::iterator i = m_server->m_clients.begin(); i != m_server->m_clients.end(); ++i) { RemoteClient *client = i->second; if (modified_blocks.size() > 0) { // Remove block from sent history client->SetBlocksNotSent(modified_blocks); } } } catch (VersionMismatchException &e) { std::ostringstream err; err << "World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl; err << "----"<<std::endl; err << "\""<<e.what()<<"\""<<std::endl; err << "See debug.txt."<<std::endl; err << "World probably saved by a newer version of Minetest."<<std::endl; m_server->setAsyncFatalError(err.str()); } catch (SerializationError &e) { std::ostringstream err; err << "Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl; err << "----"<<std::endl; err << "\""<<e.what()<<"\""<<std::endl; err << "See debug.txt."<<std::endl; err << "You can ignore this using [ignore_world_load_errors = true]."<<std::endl; m_server->setAsyncFatalError(err.str()); } END_DEBUG_EXCEPTION_HANDLER(errorstream) log_deregister_thread(); return NULL; }