3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
4 Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include "jthread/jevent.h"
28 #include "environment.h"
29 #include "util/container.h"
30 #include "util/thread.h"
32 #include "constants.h"
36 #include "serverobject.h"
38 #include "scripting_game.h"
43 #include "mapgen_v6.h"
44 #include "mapgen_v7.h"
45 #include "mapgen_indev.h"
46 #include "mapgen_singlenode.h"
47 #include "mapgen_math.h"
50 class EmergeThread : public SimpleThread
55 EmergeManager *emerge;
57 bool enable_mapgen_debug_info;
61 std::queue<v3s16> blockqueue;
63 EmergeThread(Server *server, int ethreadid):
78 if(IsRunning() == false)
84 bool popBlockEmerge(v3s16 *pos, u8 *flags);
85 bool getBlockOrStartGen(v3s16 p, MapBlock **b,
86 BlockMakeData *data, bool allow_generate);
90 /////////////////////////////// Emerge Manager ////////////////////////////////
92 EmergeManager::EmergeManager(IGameDef *gamedef) {
93 //register built-in mapgens
94 registerMapgen("v6", new MapgenFactoryV6());
95 registerMapgen("v7", new MapgenFactoryV7());
96 registerMapgen("indev", new MapgenFactoryIndev());
97 registerMapgen("singlenode", new MapgenFactorySinglenode());
98 registerMapgen("math", new MapgenFactoryMath());
100 this->ndef = gamedef->getNodeDefManager();
101 this->biomedef = new BiomeDefManager();
104 this->luaoverride_params = NULL;
105 this->luaoverride_params_modified = 0;
106 this->luaoverride_flagmask = 0;
108 mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
112 if (g_settings->get("num_emerge_threads").empty()) {
113 int nprocs = porting::getNumberOfProcessors();
114 // leave a proc for the main thread and one for some other misc threads
115 nthreads = (nprocs > 2) ? nprocs - 2 : 1;
117 nthreads = g_settings->getU16("num_emerge_threads");
122 qlimit_total = g_settings->getU16("emergequeue_limit_total");
123 qlimit_diskonly = g_settings->get("emergequeue_limit_diskonly").empty() ?
125 g_settings->getU16("emergequeue_limit_diskonly");
126 qlimit_generate = g_settings->get("emergequeue_limit_generate").empty() ?
128 g_settings->getU16("emergequeue_limit_generate");
130 for (int i = 0; i != nthreads; i++)
131 emergethread.push_back(new EmergeThread((Server *)gamedef, i));
133 infostream << "EmergeManager: using " << nthreads << " threads" << std::endl;
137 EmergeManager::~EmergeManager() {
138 for (unsigned int i = 0; i != emergethread.size(); i++) {
139 emergethread[i]->setRun(false);
140 emergethread[i]->qevent.signal();
141 emergethread[i]->stop();
142 delete emergethread[i];
145 emergethread.clear();
148 for (unsigned int i = 0; i < ores.size(); i++)
152 for (unsigned int i = 0; i < decorations.size(); i++)
153 delete decorations[i];
156 for (std::map<std::string, MapgenFactory *>::iterator iter = mglist.begin();
157 iter != mglist.end(); iter ++) {
166 void EmergeManager::initMapgens(MapgenParams *mgparams) {
172 // Resolve names of nodes for things that were registered
173 // (at this point, the registration period is over)
174 biomedef->resolveNodeNames(ndef);
176 for (size_t i = 0; i != ores.size(); i++)
177 ores[i]->resolveNodeNames(ndef);
179 for (size_t i = 0; i != decorations.size(); i++)
180 decorations[i]->resolveNodeNames(ndef);
182 // Apply mapgen parameter overrides from Lua
183 if (luaoverride_params) {
184 if (luaoverride_params_modified & MGPARAMS_SET_MGNAME)
185 mgparams->mg_name = luaoverride_params->mg_name;
187 if (luaoverride_params_modified & MGPARAMS_SET_SEED)
188 mgparams->seed = luaoverride_params->seed;
190 if (luaoverride_params_modified & MGPARAMS_SET_WATER_LEVEL)
191 mgparams->water_level = luaoverride_params->water_level;
193 if (luaoverride_params_modified & MGPARAMS_SET_FLAGS) {
194 mgparams->flags &= ~luaoverride_flagmask;
195 mgparams->flags |= luaoverride_params->flags;
198 delete luaoverride_params;
199 luaoverride_params = NULL;
202 // Create the mapgens
203 this->params = mgparams;
204 for (size_t i = 0; i != emergethread.size(); i++) {
205 mg = createMapgen(params->mg_name, 0, params);
207 infostream << "EmergeManager: falling back to mapgen v6" << std::endl;
209 params = createMapgenParams("v6");
210 mg = createMapgen("v6", 0, params);
212 mapgen.push_back(mg);
217 Mapgen *EmergeManager::getCurrentMapgen() {
218 for (unsigned int i = 0; i != emergethread.size(); i++) {
219 if (emergethread[i]->IsSameThread())
220 return emergethread[i]->mapgen;
227 void EmergeManager::triggerAllThreads() {
228 for (unsigned int i = 0; i != emergethread.size(); i++)
229 emergethread[i]->trigger();
232 bool EmergeManager::enqueueBlockEmerge(u16 peer_id, v3s16 p, bool allow_generate) {
233 std::map<v3s16, BlockEmergeData *>::const_iterator iter;
234 BlockEmergeData *bedata;
240 flags |= BLOCK_EMERGE_ALLOWGEN;
243 JMutexAutoLock queuelock(queuemutex);
245 count = blocks_enqueued.size();
246 if (count >= qlimit_total)
249 count = peer_queue_count[peer_id];
250 u16 qlimit_peer = allow_generate ? qlimit_generate : qlimit_diskonly;
251 if (count >= qlimit_peer)
254 iter = blocks_enqueued.find(p);
255 if (iter != blocks_enqueued.end()) {
256 bedata = iter->second;
257 bedata->flags |= flags;
261 bedata = new BlockEmergeData;
262 bedata->flags = flags;
263 bedata->peer_requested = peer_id;
264 blocks_enqueued.insert(std::make_pair(p, bedata));
266 peer_queue_count[peer_id] = count + 1;
268 // insert into the EmergeThread queue with the least items
269 int lowestitems = emergethread[0]->blockqueue.size();
270 for (unsigned int i = 1; i != emergethread.size(); i++) {
271 int nitems = emergethread[i]->blockqueue.size();
272 if (nitems < lowestitems) {
274 lowestitems = nitems;
278 emergethread[idx]->blockqueue.push(p);
280 emergethread[idx]->qevent.signal();
286 int EmergeManager::getGroundLevelAtPoint(v2s16 p) {
287 if (mapgen.size() == 0 || !mapgen[0]) {
288 errorstream << "EmergeManager: getGroundLevelAtPoint() called"
289 " before mapgen initialized" << std::endl;
293 return mapgen[0]->getGroundLevelAtPoint(p);
297 bool EmergeManager::isBlockUnderground(v3s16 blockpos) {
299 v2s16 p = v2s16((blockpos.X * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2,
300 (blockpos.Y * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2);
301 int ground_level = getGroundLevelAtPoint(p);
302 return blockpos.Y * (MAP_BLOCKSIZE + 1) <= min(water_level, ground_level);
305 //yuck, but then again, should i bother being accurate?
306 //the height of the nodes in a single block is quite variable
307 return blockpos.Y * (MAP_BLOCKSIZE + 1) <= params->water_level;
311 u32 EmergeManager::getBlockSeed(v3s16 p) {
312 return (u32)(params->seed & 0xFFFFFFFF) +
319 Mapgen *EmergeManager::createMapgen(std::string mgname, int mgid,
320 MapgenParams *mgparams) {
321 std::map<std::string, MapgenFactory *>::const_iterator iter;
322 iter = mglist.find(mgname);
323 if (iter == mglist.end()) {
324 errorstream << "EmergeManager; mapgen " << mgname <<
325 " not registered" << std::endl;
329 MapgenFactory *mgfactory = iter->second;
330 return mgfactory->createMapgen(mgid, mgparams, this);
334 MapgenParams *EmergeManager::createMapgenParams(std::string mgname) {
335 std::map<std::string, MapgenFactory *>::const_iterator iter;
336 iter = mglist.find(mgname);
337 if (iter == mglist.end()) {
338 errorstream << "EmergeManager: mapgen " << mgname <<
339 " not registered" << std::endl;
343 MapgenFactory *mgfactory = iter->second;
344 return mgfactory->createMapgenParams();
348 MapgenParams *EmergeManager::getParamsFromSettings(Settings *settings) {
349 std::string mg_name = settings->get("mg_name");
350 MapgenParams *mgparams = createMapgenParams(mg_name);
354 std::string seedstr = settings->get(settings == g_settings ?
355 "fixed_map_seed" : "seed");
357 mgparams->mg_name = mg_name;
358 mgparams->seed = read_seed(seedstr.c_str());
359 mgparams->water_level = settings->getS16("water_level");
360 mgparams->chunksize = settings->getS16("chunksize");
361 mgparams->flags = settings->getFlagStr("mg_flags", flagdesc_mapgen);
363 if (!mgparams->readParams(settings)) {
371 void EmergeManager::setParamsToSettings(Settings *settings) {
372 settings->set("mg_name", params->mg_name);
373 settings->setU64("seed", params->seed);
374 settings->setS16("water_level", params->water_level);
375 settings->setS16("chunksize", params->chunksize);
376 settings->setFlagStr("mg_flags", params->flags, flagdesc_mapgen);
378 params->writeParams(settings);
382 void EmergeManager::registerMapgen(std::string mgname, MapgenFactory *mgfactory) {
383 mglist.insert(std::make_pair(mgname, mgfactory));
384 infostream << "EmergeManager: registered mapgen " << mgname << std::endl;
388 ////////////////////////////// Emerge Thread //////////////////////////////////
390 bool EmergeThread::popBlockEmerge(v3s16 *pos, u8 *flags) {
391 std::map<v3s16, BlockEmergeData *>::iterator iter;
392 JMutexAutoLock queuelock(emerge->queuemutex);
394 if (blockqueue.empty())
396 v3s16 p = blockqueue.front();
401 iter = emerge->blocks_enqueued.find(p);
402 if (iter == emerge->blocks_enqueued.end())
403 return false; //uh oh, queue and map out of sync!!
405 BlockEmergeData *bedata = iter->second;
406 *flags = bedata->flags;
408 emerge->peer_queue_count[bedata->peer_requested]--;
411 emerge->blocks_enqueued.erase(iter);
417 bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b,
418 BlockMakeData *data, bool allow_gen) {
420 //envlock: usually takes <=1ms, sometimes 90ms or ~400ms to acquire
421 JMutexAutoLock envlock(m_server->m_env_mutex);
423 // Load sector if it isn't loaded
424 if (map->getSectorNoGenerateNoEx(p2d) == NULL)
425 map->loadSectorMeta(p2d);
427 // Attempt to load block
428 MapBlock *block = map->getBlockNoCreateNoEx(p);
429 if (!block || block->isDummy() || !block->isGenerated()) {
430 EMERGE_DBG_OUT("not in memory, attempting to load from disk");
431 block = map->loadBlock(p);
432 if (block && block->isGenerated())
433 map->prepareBlock(block);
436 // If could not load and allowed to generate,
437 // start generation inside this same envlock
438 if (allow_gen && (block == NULL || !block->isGenerated())) {
439 EMERGE_DBG_OUT("generating");
441 return map->initBlockMake(data, p);
449 void *EmergeThread::Thread() {
451 log_register_thread("EmergeThread" + itos(id));
452 DSTACK(__FUNCTION_NAME);
453 BEGIN_DEBUG_EXCEPTION_HANDLER
455 v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
459 map = (ServerMap *)&(m_server->m_env->getMap());
460 emerge = m_server->m_emerge;
461 mapgen = emerge->mapgen[id];
462 enable_mapgen_debug_info = emerge->mapgen_debug_info;
466 if (!popBlockEmerge(&p, &flags)) {
472 if (blockpos_over_limit(p))
475 bool allow_generate = flags & BLOCK_EMERGE_ALLOWGEN;
476 EMERGE_DBG_OUT("p=" PP(p) " allow_generate=" << allow_generate);
479 Try to fetch block from memory or disk.
480 If not found and asked to generate, initialize generator.
483 MapBlock *block = NULL;
484 std::map<v3s16, MapBlock *> modified_blocks;
486 if (getBlockOrStartGen(p, &block, &data, allow_generate)) {
488 ScopeProfiler sp(g_profiler, "EmergeThread: Mapgen::makeChunk", SPT_AVG);
489 TimeTaker t("mapgen::make_block()");
491 mapgen->makeChunk(&data);
493 if (enable_mapgen_debug_info == false)
494 t.stop(true); // Hide output
498 //envlock: usually 0ms, but can take either 30 or 400ms to acquire
499 JMutexAutoLock envlock(m_server->m_env_mutex);
500 ScopeProfiler sp(g_profiler, "EmergeThread: after "
501 "Mapgen::makeChunk (envlock)", SPT_AVG);
503 map->finishBlockMake(&data, modified_blocks);
505 block = map->getBlockNoCreateNoEx(p);
508 Do some post-generate stuff
510 v3s16 minp = data.blockpos_min * MAP_BLOCKSIZE;
511 v3s16 maxp = data.blockpos_max * MAP_BLOCKSIZE +
512 v3s16(1,1,1) * (MAP_BLOCKSIZE - 1);
514 // Ignore map edit events, they will not need to be sent
515 // to anybody because the block hasn't been sent to anybody
516 MapEditEventAreaIgnorer
517 ign(&m_server->m_ignore_map_edit_events_area,
518 VoxelArea(minp, maxp));
519 { // takes about 90ms with -O1 on an e3-1230v2
520 m_server->getScriptIface()->environment_OnGenerated(
521 minp, maxp, emerge->getBlockSeed(minp));
524 EMERGE_DBG_OUT("ended up with: " << analyze_block(block));
526 m_server->m_env->activateBlock(block, 0);
532 Set sent status of modified blocks on clients
535 // NOTE: Server's clients are also behind the connection mutex
536 //conlock: consistently takes 30-40ms to acquire
537 JMutexAutoLock lock(m_server->m_con_mutex);
538 // Add the originally fetched block to the modified list
540 modified_blocks[p] = block;
542 // Set the modified blocks unsent for all the clients
543 for (std::map<u16, RemoteClient*>::iterator
544 i = m_server->m_clients.begin();
545 i != m_server->m_clients.end(); ++i) {
546 RemoteClient *client = i->second;
547 if (modified_blocks.size() > 0) {
548 // Remove block from sent history
549 client->SetBlocksNotSent(modified_blocks);
553 catch (VersionMismatchException &e) {
554 std::ostringstream err;
555 err << "World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
556 err << "----"<<std::endl;
557 err << "\""<<e.what()<<"\""<<std::endl;
558 err << "See debug.txt."<<std::endl;
559 err << "World probably saved by a newer version of Minetest."<<std::endl;
560 m_server->setAsyncFatalError(err.str());
562 catch (SerializationError &e) {
563 std::ostringstream err;
564 err << "Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
565 err << "----"<<std::endl;
566 err << "\""<<e.what()<<"\""<<std::endl;
567 err << "See debug.txt."<<std::endl;
568 err << "You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
569 m_server->setAsyncFatalError(err.str());
572 END_DEBUG_EXCEPTION_HANDLER(errorstream)
573 log_deregister_thread();