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-rw-r--r--src/emerge.cpp453
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diff --git a/src/emerge.cpp b/src/emerge.cpp
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+/*
+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 "mapblock.h"
+#include "serverobject.h"
+#include "settings.h"
+#include "script.h"
+#include "scriptapi.h"
+#include "profiler.h"
+#include "log.h"
+#include "nodedef.h"
+#include "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) ? nthreads = 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 (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 (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 (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);
+}
+
+
+bool 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;
+ core::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.insert(p, block);
+
+ // Set the modified blocks unsent for all the clients
+ for (core::map<u16, RemoteClient*>::Iterator
+ i = m_server->m_clients.getIterator();
+ i.atEnd() == false; i++) {
+ RemoteClient *client = i.getNode()->getValue();
+ 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;
+}
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