src/emerge.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20
  21 #include "server.h"
  22 #include <iostream>
  23 #include <queue>
  24 #include "clientserver.h"
  25 #include "map.h"
  26 #include "jmutexautolock.h"
  27 #include "main.h"
  28 #include "constants.h"
  29 #include "voxel.h"
  30 #include "config.h"
  31 #include "mapblock.h"
  32 #include "serverobject.h"
  33 #include "settings.h"
  34 #include "script.h"
  35 #include "scriptapi.h"
  36 #include "profiler.h"
  37 #include "log.h"
  38 #include "nodedef.h"
  39 #include "biome.h"
  40 #include "emerge.h"
  41 #include "mapgen_v6.h"
  42
  43
  44 EmergeManager::EmergeManager(IGameDef *gamedef, BiomeDefManager *bdef) {
  45         //register built-in mapgens
  46         registerMapgen("v6", new MapgenFactoryV6());
  47
  48         this->biomedef = bdef ? bdef : new BiomeDefManager(gamedef);
  49         this->params   = NULL;
  50
  51         mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
  52
  53         queuemutex.Init();
  54
  55         int nthreads;
  56         if (g_settings->get("num_emerge_threads").empty()) {
  57                 int nprocs = porting::getNumberOfProcessors();
  58                 // leave a proc for the main thread and one for some other misc threads
  59                 if (nprocs > 2)
  60                         nthreads = nprocs - 2;
  61         } else {
  62                 nthreads = g_settings->getU16("num_emerge_threads");
  63         }
  64         if (nthreads < 1)
  65                 nthreads = 1;
  66
  67         qlimit_total    = g_settings->getU16("emergequeue_limit_total");
  68         qlimit_diskonly = g_settings->get("emergequeue_limit_diskonly").empty() ?
  69                 nthreads * 5 + 1 :
  70                 g_settings->getU16("emergequeue_limit_diskonly");
  71         qlimit_generate = g_settings->get("emergequeue_limit_generate").empty() ?
  72                 nthreads + 1 :
  73                 g_settings->getU16("emergequeue_limit_generate");
  74
  75         for (int i = 0; i != nthreads; i++)
  76                 emergethread.push_back(new EmergeThread((Server *)gamedef, i));
  77
  78         infostream << "EmergeManager: using " << nthreads << " threads" << std::endl;
  79 }
  80
  81
  82 EmergeManager::~EmergeManager() {
  83         for (int i = 0; i != emergethread.size(); i++) {
  84                 emergethread[i]->setRun(false);
  85                 emergethread[i]->qevent.signal();
  86                 emergethread[i]->stop();
  87                 delete emergethread[i];
  88                 delete mapgen[i];
  89         }
  90
  91         delete biomedef;
  92         delete params;
  93 }
  94
  95
  96 void EmergeManager::initMapgens(MapgenParams *mgparams) {
  97         Mapgen *mg;
  98
  99         if (mapgen.size())
 100                 return;
 101
 102         this->params = mgparams;
 103         for (int i = 0; i != emergethread.size(); i++) {
 104                 mg = createMapgen(params->mg_name, 0, params);
 105                 if (!mg) {
 106                         infostream << "EmergeManager: falling back to mapgen v6" << std::endl;
 107                         delete params;
 108                         params = createMapgenParams("v6");
 109                         mg = createMapgen("v6", 0, params);
 110                 }
 111                 mapgen.push_back(mg);
 112         }
 113 }
 114
 115
 116 bool EmergeManager::enqueueBlockEmerge(u16 peer_id, v3s16 p, bool allow_generate) {
 117         std::map<v3s16, BlockEmergeData *>::const_iterator iter;
 118         BlockEmergeData *bedata;
 119         u16 count;
 120         u8 flags = 0;
 121         int idx = 0;
 122
 123         if (allow_generate)
 124                 flags |= BLOCK_EMERGE_ALLOWGEN;
 125
 126         {
 127                 JMutexAutoLock queuelock(queuemutex);
 128
 129                 count = blocks_enqueued.size();
 130                 if (count >= qlimit_total)
 131                         return false;
 132
 133                 count = peer_queue_count[peer_id];
 134                 u16 qlimit_peer = allow_generate ? qlimit_generate : qlimit_diskonly;
 135                 if (count >= qlimit_peer)
 136                         return false;
 137
 138                 iter = blocks_enqueued.find(p);
 139                 if (iter != blocks_enqueued.end()) {
 140                         bedata = iter->second;
 141                         bedata->flags |= flags;
 142                         return true;
 143                 }
 144
 145                 bedata = new BlockEmergeData;
 146                 bedata->flags = flags;
 147                 bedata->peer_requested = peer_id;
 148                 blocks_enqueued.insert(std::make_pair(p, bedata));
 149
 150                 peer_queue_count[peer_id] = count + 1;
 151
 152                 // insert into the EmergeThread queue with the least items
 153                 int lowestitems = emergethread[0]->blockqueue.size();
 154                 for (int i = 1; i != emergethread.size(); i++) {
 155                         int nitems = emergethread[i]->blockqueue.size();
 156                         if (nitems < lowestitems) {
 157                                 idx = i;
 158                                 lowestitems = nitems;
 159                         }
 160                 }
 161
 162                 emergethread[idx]->blockqueue.push(p);
 163         }
 164         emergethread[idx]->qevent.signal();
 165
 166         return true;
 167 }
 168
 169
 170 bool EmergeThread::popBlockEmerge(v3s16 *pos, u8 *flags) {
 171         std::map<v3s16, BlockEmergeData *>::iterator iter;
 172         JMutexAutoLock queuelock(emerge->queuemutex);
 173
 174         if (blockqueue.empty())
 175                 return false;
 176         v3s16 p = blockqueue.front();
 177         blockqueue.pop();
 178
 179         *pos = p;
 180
 181         iter = emerge->blocks_enqueued.find(p);
 182         if (iter == emerge->blocks_enqueued.end())
 183                 return false; //uh oh, queue and map out of sync!!
 184
 185         BlockEmergeData *bedata = iter->second;
 186         *flags = bedata->flags;
 187
 188         emerge->peer_queue_count[bedata->peer_requested]--;
 189
 190         delete bedata;
 191         emerge->blocks_enqueued.erase(iter);
 192
 193         return true;
 194 }
 195
 196
 197 int EmergeManager::getGroundLevelAtPoint(v2s16 p) {
 198         if (mapgen.size() == 0 || !mapgen[0]) {
 199                 errorstream << "EmergeManager: getGroundLevelAtPoint() called"
 200                 " before mapgen initialized" << std::endl;
 201                 return 0;
 202         }
 203
 204         return mapgen[0]->getGroundLevelAtPoint(p);
 205 }
 206
 207
 208 bool EmergeManager::isBlockUnderground(v3s16 blockpos) {
 209         /*
 210         v2s16 p = v2s16((blockpos.X * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2,
 211                                         (blockpos.Y * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2);
 212         int ground_level = getGroundLevelAtPoint(p);
 213         return blockpos.Y * (MAP_BLOCKSIZE + 1) <= min(water_level, ground_level);
 214         */
 215
 216         //yuck, but then again, should i bother being accurate?
 217         //the height of the nodes in a single block is quite variable
 218         return blockpos.Y * (MAP_BLOCKSIZE + 1) <= params->water_level;
 219 }
 220
 221
 222 u32 EmergeManager::getBlockSeed(v3s16 p) {
 223         return (u32)(params->seed & 0xFFFFFFFF) +
 224                 p.Z * 38134234 +
 225                 p.Y * 42123 +
 226                 p.X * 23;
 227 }
 228
 229
 230 Mapgen *EmergeManager::createMapgen(std::string mgname, int mgid,
 231                                                                          MapgenParams *mgparams) {
 232         std::map<std::string, MapgenFactory *>::const_iterator iter;
 233         iter = mglist.find(mgname);
 234         if (iter == mglist.end()) {
 235                 errorstream << "EmergeManager; mapgen " << mgname <<
 236                  " not registered" << std::endl;
 237                 return NULL;
 238         }
 239
 240         MapgenFactory *mgfactory = iter->second;
 241         return mgfactory->createMapgen(mgid, mgparams, this);
 242 }
 243
 244
 245 MapgenParams *EmergeManager::createMapgenParams(std::string mgname) {
 246         std::map<std::string, MapgenFactory *>::const_iterator iter;
 247         iter = mglist.find(mgname);
 248         if (iter == mglist.end()) {
 249                 errorstream << "EmergeManager: mapgen " << mgname <<
 250                  " not registered" << std::endl;
 251                 return NULL;
 252         }
 253
 254         MapgenFactory *mgfactory = iter->second;
 255         return mgfactory->createMapgenParams();
 256 }
 257
 258
 259 MapgenParams *EmergeManager::getParamsFromSettings(Settings *settings) {
 260         std::string mg_name = settings->get("mg_name");
 261         MapgenParams *mgparams = createMapgenParams(mg_name);
 262
 263         mgparams->mg_name     = mg_name;
 264         mgparams->seed        = settings->getU64(settings == g_settings ? "fixed_map_seed" : "seed");
 265         mgparams->water_level = settings->getS16("water_level");
 266         mgparams->chunksize   = settings->getS16("chunksize");
 267         mgparams->flags       = settings->getFlagStr("mg_flags", flagdesc_mapgen);
 268
 269         if (!mgparams->readParams(settings)) {
 270                 delete mgparams;
 271                 return NULL;
 272         }
 273         return mgparams;
 274 }
 275
 276
 277 void EmergeManager::setParamsToSettings(Settings *settings) {
 278         settings->set("mg_name",         params->mg_name);
 279         settings->setU64("seed",         params->seed);
 280         settings->setS16("water_level",  params->water_level);
 281         settings->setS16("chunksize",    params->chunksize);
 282         settings->setFlagStr("mg_flags", params->flags, flagdesc_mapgen);
 283
 284         params->writeParams(settings);
 285 }
 286
 287
 288 bool EmergeManager::registerMapgen(std::string mgname, MapgenFactory *mgfactory) {
 289         mglist.insert(std::make_pair(mgname, mgfactory));
 290         infostream << "EmergeManager: registered mapgen " << mgname << std::endl;
 291 }
 292
 293
 294
 295 class MapEditEventIgnorer
 296 {
 297 public:
 298         MapEditEventIgnorer(bool *flag):
 299                 m_flag(flag)
 300         {
 301                 if(*m_flag == false)
 302                         *m_flag = true;
 303                 else
 304                         m_flag = NULL;
 305         }
 306
 307         ~MapEditEventIgnorer()
 308         {
 309                 if(m_flag)
 310                 {
 311                         assert(*m_flag);
 312                         *m_flag = false;
 313                 }
 314         }
 315
 316 private:
 317         bool *m_flag;
 318 };
 319
 320 class MapEditEventAreaIgnorer
 321 {
 322 public:
 323         MapEditEventAreaIgnorer(VoxelArea *ignorevariable, const VoxelArea &a):
 324                 m_ignorevariable(ignorevariable)
 325         {
 326                 if(m_ignorevariable->getVolume() == 0)
 327                         *m_ignorevariable = a;
 328                 else
 329                         m_ignorevariable = NULL;
 330         }
 331
 332         ~MapEditEventAreaIgnorer()
 333         {
 334                 if(m_ignorevariable)
 335                 {
 336                         assert(m_ignorevariable->getVolume() != 0);
 337                         *m_ignorevariable = VoxelArea();
 338                 }
 339         }
 340
 341 private:
 342         VoxelArea *m_ignorevariable;
 343 };
 344
 345
 346 #if 1
 347
 348 bool EmergeThread::getBlockOrStartGen(v3s16 p, MapBlock **b,
 349                                                                         BlockMakeData *data, bool allow_gen) {
 350         v2s16 p2d(p.X, p.Z);
 351         //envlock: usually takes <=1ms, sometimes 90ms or ~400ms to acquire
 352         JMutexAutoLock envlock(m_server->m_env_mutex);
 353
 354         // Load sector if it isn't loaded
 355         if (map->getSectorNoGenerateNoEx(p2d) == NULL)
 356                 map->loadSectorMeta(p2d);
 357
 358         // Attempt to load block
 359         MapBlock *block = map->getBlockNoCreateNoEx(p);
 360         if (!block || block->isDummy() || !block->isGenerated()) {
 361                 EMERGE_DBG_OUT("not in memory, attempting to load from disk");
 362                 block = map->loadBlock(p);
 363         }
 364
 365         // If could not load and allowed to generate,
 366         // start generation inside this same envlock
 367         if (allow_gen && (block == NULL || !block->isGenerated())) {
 368                 EMERGE_DBG_OUT("generating");
 369                 *b = block;
 370                 return map->initBlockMake(data, p);
 371         }
 372
 373         *b = block;
 374         return false;
 375 }
 376
 377
 378 void *EmergeThread::Thread() {
 379         ThreadStarted();
 380         log_register_thread("EmergeThread" + id);
 381         DSTACK(__FUNCTION_NAME);
 382         BEGIN_DEBUG_EXCEPTION_HANDLER
 383
 384         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 385         v3s16 p;
 386         u8 flags;
 387
 388         map    = (ServerMap *)&(m_server->m_env->getMap());
 389         emerge = m_server->m_emerge;
 390         mapgen = emerge->mapgen[id];
 391         enable_mapgen_debug_info = emerge->mapgen_debug_info;
 392
 393         while (getRun())
 394         try {
 395                 if (!popBlockEmerge(&p, &flags)) {
 396                         qevent.wait();
 397                         continue;
 398                 }
 399
 400                 last_tried_pos = p;
 401                 if (blockpos_over_limit(p))
 402                         continue;
 403
 404                 bool allow_generate = flags & BLOCK_EMERGE_ALLOWGEN;
 405                 EMERGE_DBG_OUT("p=" PP(p) " allow_generate=" << allow_generate);
 406
 407                 /*
 408                         Try to fetch block from memory or disk.
 409                         If not found and asked to generate, initialize generator.
 410                 */
 411                 BlockMakeData data;
 412                 MapBlock *block = NULL;
 413                 core::map<v3s16, MapBlock *> modified_blocks;
 414
 415                 if (getBlockOrStartGen(p, &block, &data, allow_generate)) {
 416                         {
 417                                 ScopeProfiler sp(g_profiler, "EmergeThread: Mapgen::makeChunk", SPT_AVG);
 418                                 TimeTaker t("mapgen::make_block()");
 419
 420                                 mapgen->makeChunk(&data);
 421
 422                                 if (enable_mapgen_debug_info == false)
 423                                         t.stop(true); // Hide output
 424                         }
 425
 426                         {
 427                                 //envlock: usually 0ms, but can take either 30 or 400ms to acquire
 428                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 429                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 430                                                 "Mapgen::makeChunk (envlock)", SPT_AVG);
 431
 432                                 map->finishBlockMake(&data, modified_blocks);
 433
 434                                 block = map->getBlockNoCreateNoEx(p);
 435                                 if (block) {
 436                                         /*
 437                                                 Do some post-generate stuff
 438                                         */
 439                                         v3s16 minp = data.blockpos_min * MAP_BLOCKSIZE;
 440                                         v3s16 maxp = data.blockpos_max * MAP_BLOCKSIZE +
 441                                                                  v3s16(1,1,1) * (MAP_BLOCKSIZE - 1);
 442
 443                                         // Ignore map edit events, they will not need to be sent
 444                                         // to anybody because the block hasn't been sent to anybody
 445                                         MapEditEventAreaIgnorer
 446                                                 ign(&m_server->m_ignore_map_edit_events_area,
 447                                                 VoxelArea(minp, maxp));
 448                                         {  // takes about 90ms with -O1 on an e3-1230v2
 449                                                 scriptapi_environment_on_generated(m_server->m_lua,
 450                                                                 minp, maxp, emerge->getBlockSeed(minp));
 451                                         }
 452
 453                                         EMERGE_DBG_OUT("ended up with: " << analyze_block(block));
 454
 455                                         m_server->m_env->activateBlock(block, 0);
 456                                 }
 457                         }
 458                 }
 459
 460                 /*
 461                         Set sent status of modified blocks on clients
 462                 */
 463
 464                 // NOTE: Server's clients are also behind the connection mutex
 465                 //conlock: consistently takes 30-40ms to acquire
 466                 JMutexAutoLock lock(m_server->m_con_mutex);
 467                 // Add the originally fetched block to the modified list
 468                 if (block)
 469                         modified_blocks.insert(p, block);
 470
 471                 // Set the modified blocks unsent for all the clients
 472                 for (core::map<u16, RemoteClient*>::Iterator
 473                          i = m_server->m_clients.getIterator();
 474                          i.atEnd() == false; i++) {
 475                         RemoteClient *client = i.getNode()->getValue();
 476                         if (modified_blocks.size() > 0) {
 477                                 // Remove block from sent history
 478                                 client->SetBlocksNotSent(modified_blocks);
 479                         }
 480                 }
 481         }
 482         catch (VersionMismatchException &e) {
 483                 std::ostringstream err;
 484                 err << "World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 485                 err << "----"<<std::endl;
 486                 err << "\""<<e.what()<<"\""<<std::endl;
 487                 err << "See debug.txt."<<std::endl;
 488                 err << "World probably saved by a newer version of Minetest."<<std::endl;
 489                 m_server->setAsyncFatalError(err.str());
 490         }
 491         catch (SerializationError &e) {
 492                 std::ostringstream err;
 493                 err << "Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 494                 err << "----"<<std::endl;
 495                 err << "\""<<e.what()<<"\""<<std::endl;
 496                 err << "See debug.txt."<<std::endl;
 497                 err << "You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 498                 m_server->setAsyncFatalError(err.str());
 499         }
 500
 501         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 502         log_deregister_thread();
 503         return NULL;
 504 }
 505
 506 #else
 507
 508 void *EmergeThread::Thread() {
 509         ThreadStarted();
 510         log_register_thread("EmergeThread");
 511         DSTACK(__FUNCTION_NAME);
 512         BEGIN_DEBUG_EXCEPTION_HANDLER
 513
 514         bool enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 515
 516         v3s16 last_tried_pos(-32768,-32768,-32768); // For error output
 517         ServerMap &map = ((ServerMap&)m_server->m_env->getMap());
 518         EmergeManager *emerge = m_server->m_emerge;
 519         Mapgen *mapgen = emerge->getMapgen();
 520
 521         while(getRun())
 522         try {
 523                 QueuedBlockEmerge *qptr = m_server->m_emerge_queue.pop();
 524                 if(qptr == NULL)
 525                         break;
 526                 SharedPtr<QueuedBlockEmerge> q(qptr);
 527
 528                 v3s16 &p = q->pos;
 529                 v2s16 p2d(p.X,p.Z);
 530
 531                 last_tried_pos = p;
 532
 533                 /*
 534                         Do not generate over-limit
 535                 */
 536                 if (blockpos_over_limit(p))
 537                         continue;
 538
 539                 //infostream<<"EmergeThread::Thread(): running"<<std::endl;
 540
 541                 //TimeTaker timer("block emerge");
 542
 543                 /*
 544                         Try to emerge it from somewhere.
 545
 546                         If it is only wanted as optional, only loading from disk
 547                         will be allowed.
 548                 */
 549
 550                 /*
 551                         Check if any peer wants it as non-optional. In that case it
 552                         will be generated.
 553
 554                         Also decrement the emerge queue count in clients.
 555                 */
 556
 557                 bool only_from_disk = true;
 558                 {
 559                         core::map<u16, u8>::Iterator i;
 560                         for (i=q->s.getIterator(); !i.atEnd(); i++) {
 561                                 u8 flags = i.getNode()->getValue();
 562                                 if (!(flags & BLOCK_EMERGE_FLAG_FROMDISK)) {
 563                                         only_from_disk = false;
 564                                         break;
 565                                 }
 566                         }
 567                 }
 568
 569                 if (enable_mapgen_debug_info)
 570                         infostream<<"EmergeThread: p="
 571                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<") "
 572                                         <<"only_from_disk="<<only_from_disk<<std::endl;
 573
 574                 MapBlock *block = NULL;
 575                 bool got_block = true;
 576                 core::map<v3s16, MapBlock*> modified_blocks;
 577
 578                 /*
 579                         Try to fetch block from memory or disk.
 580                         If not found and asked to generate, initialize generator.
 581                 */
 582
 583                 bool started_generate = false;
 584                 BlockMakeData data;
 585                 {
 586                         JMutexAutoLock envlock(m_server->m_env_mutex);
 587
 588                         // Load sector if it isn't loaded
 589                         if(map.getSectorNoGenerateNoEx(p2d) == NULL)
 590                                 map.loadSectorMeta(p2d);
 591
 592                         // Attempt to load block
 593                         block = map.getBlockNoCreateNoEx(p);
 594                         if(!block || block->isDummy() || !block->isGenerated()) {
 595                                 if(enable_mapgen_debug_info)
 596                                         infostream<<"EmergeThread: not in memory, "
 597                                                         <<"attempting to load from disk"<<std::endl;
 598
 599                                 block = map.loadBlock(p);
 600                         }
 601
 602                         // If could not load and allowed to generate, start generation
 603                         // inside this same envlock
 604                         if(only_from_disk == false &&
 605                                         (block == NULL || block->isGenerated() == false)){
 606                                 if(enable_mapgen_debug_info)
 607                                         infostream<<"EmergeThread: generating"<<std::endl;
 608                                 started_generate = true;
 609
 610                                 map.initBlockMake(&data, p);
 611                         }
 612                 }
 613
 614                 /*
 615                         If generator was initialized, generate now when envlock is free.
 616                 */
 617                 if(started_generate) {
 618                         {
 619                                 ScopeProfiler sp(g_profiler, "EmergeThread: mapgen::make_block",
 620                                                 SPT_AVG);
 621                                 TimeTaker t("mapgen::make_block()");
 622
 623                                 mapgen->makeChunk(&data);
 624
 625                                 if (enable_mapgen_debug_info == false)
 626                                         t.stop(true); // Hide output
 627                         }
 628
 629                         do{ // enable break
 630                                 // Lock environment again to access the map
 631                                 JMutexAutoLock envlock(m_server->m_env_mutex);
 632
 633                                 ScopeProfiler sp(g_profiler, "EmergeThread: after "
 634                                                 "mapgen::make_block (envlock)", SPT_AVG);
 635
 636                                 // Blit data back on map, update lighting, add mobs and
 637                                 // whatever this does
 638                                 map.finishBlockMake(&data, modified_blocks);
 639
 640                                 // Get central block
 641                                 block = map.getBlockNoCreateNoEx(p);
 642
 643                                 // If block doesn't exist, don't try doing anything with it
 644                                 // This happens if the block is not in generation boundaries
 645                                 if(!block)
 646                                         break;
 647
 648                                 /*
 649                                         Do some post-generate stuff
 650                                 */
 651                                 v3s16 minp = data.blockpos_min * MAP_BLOCKSIZE;
 652                                 v3s16 maxp = data.blockpos_max * MAP_BLOCKSIZE +
 653                                                 v3s16(1,1,1) * (MAP_BLOCKSIZE - 1);
 654
 655                                 /*
 656                                         Ignore map edit events, they will not need to be
 657                                         sent to anybody because the block hasn't been sent
 658                                         to anybody
 659                                 */
 660                                 MapEditEventAreaIgnorer ign(
 661                                                 &m_server->m_ignore_map_edit_events_area,
 662                                                 VoxelArea(minp, maxp));
 663                                 {
 664                                         TimeTaker timer("on_generated");
 665                                         scriptapi_environment_on_generated(m_server->m_lua,
 666                                                         minp, maxp, emerge->getBlockSeed(minp));
 667                                         //int t = timer.stop(true);
 668                                         //dstream<<"on_generated took "<<t<<"ms"<<std::endl;
 669                                 }
 670
 671                                 if (enable_mapgen_debug_info)
 672                                         infostream << "EmergeThread: ended up with: "
 673                                                         << analyze_block(block) << std::endl;
 674
 675                                 // Activate objects and stuff
 676                                 m_server->m_env->activateBlock(block, 0);
 677                         }while(false);
 678                 }
 679
 680                 if(block == NULL)
 681                         got_block = false;
 682
 683                 /*
 684                         Set sent status of modified blocks on clients
 685                 */
 686
 687                 // NOTE: Server's clients are also behind the connection mutex
 688                 JMutexAutoLock lock(m_server->m_con_mutex);
 689
 690                 /*
 691                         Add the originally fetched block to the modified list
 692                 */
 693                 if(got_block)
 694                         modified_blocks.insert(p, block);
 695
 696                 /*
 697                         Set the modified blocks unsent for all the clients
 698                 */
 699                 for(core::map<u16, RemoteClient*>::Iterator
 700                                 i = m_server->m_clients.getIterator();
 701                                 i.atEnd() == false; i++) {
 702                         RemoteClient *client = i.getNode()->getValue();
 703                         if(modified_blocks.size() > 0) {
 704                                 // Remove block from sent history
 705                                 client->SetBlocksNotSent(modified_blocks);
 706                         }
 707                 }
 708
 709
 710 niters++;
 711         }
 712         catch (VersionMismatchException &e) {
 713                 std::ostringstream err;
 714                 err << "World data version mismatch in MapBlock "<<PP(last_tried_pos)<<std::endl;
 715                 err << "----"<<std::endl;
 716                 err << "\""<<e.what()<<"\""<<std::endl;
 717                 err << "See debug.txt."<<std::endl;
 718                 err << "World probably saved by a newer version of Minetest."<<std::endl;
 719                 m_server->setAsyncFatalError(err.str());
 720         }
 721         catch (SerializationError &e) {
 722                 std::ostringstream err;
 723                 err << "Invalid data in MapBlock "<<PP(last_tried_pos)<<std::endl;
 724                 err << "----"<<std::endl;
 725                 err << "\""<<e.what()<<"\""<<std::endl;
 726                 err << "See debug.txt."<<std::endl;
 727                 err << "You can ignore this using [ignore_world_load_errors = true]."<<std::endl;
 728                 m_server->setAsyncFatalError(err.str());
 729         }
 730 printf("emergethread iterated %d times\n", niters);
 731         END_DEBUG_EXCEPTION_HANDLER(errorstream)
 732         log_deregister_thread();
 733         return NULL;
 734 }
 735
 736 #endif