minetest/src/emerge.cpp

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/*
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Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
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 "cpp_api/scriptapi.h"
#include "profiler.h"
#include "log.h"
#include "nodedef.h"
#include "biome.h"
#include "emerge.h"
#include "mapgen_v6.h"
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#include "mapgen_v7.h"
#include "mapgen_indev.h"
#include "mapgen_singlenode.h"
#include "mapgen_math.h"
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/////////////////////////////// Emerge Manager ////////////////////////////////
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EmergeManager::EmergeManager(IGameDef *gamedef) {
//register built-in mapgens
registerMapgen("v6", new MapgenFactoryV6());
registerMapgen("v7", new MapgenFactoryV7());
registerMapgen("indev", new MapgenFactoryIndev());
registerMapgen("singlenode", new MapgenFactorySinglenode());
registerMapgen("math", new MapgenFactoryMath());
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this->ndef = gamedef->getNodeDefManager();
this->biomedef = new BiomeDefManager();
this->params = NULL;
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mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
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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");
}
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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");
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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++) {
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emergethread[i]->setRun(false);
emergethread[i]->qevent.signal();
emergethread[i]->stop();
delete emergethread[i];
delete mapgen[i];
}
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emergethread.clear();
mapgen.clear();
for (unsigned int i = 0; i < ores.size(); i++)
delete ores[i];
ores.clear();
for (unsigned int i = 0; i < decorations.size(); i++)
delete decorations[i];
decorations.clear();
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for (std::map<std::string, MapgenFactory *>::iterator iter = mglist.begin();
iter != mglist.end(); iter ++) {
delete iter->second;
}
mglist.clear();
delete biomedef;
}
void EmergeManager::initMapgens(MapgenParams *mgparams) {
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Mapgen *mg;
if (mapgen.size())
return;
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biomedef->resolveNodeNames(ndef);
for (size_t i = 0; i != ores.size(); i++)
ores[i]->resolveNodeNames(ndef);
for (size_t i = 0; i != decorations.size(); i++)
decorations[i]->resolveNodeNames(ndef);
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this->params = mgparams;
for (size_t i = 0; i != emergethread.size(); i++) {
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mg = createMapgen(params->mg_name, 0, params);
if (!mg) {
infostream << "EmergeManager: falling back to mapgen v6" << std::endl;
delete params;
params = createMapgenParams("v6");
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mg = createMapgen("v6", 0, params);
}
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mapgen.push_back(mg);
}
}
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Mapgen *EmergeManager::getCurrentMapgen() {
for (unsigned int i = 0; i != emergethread.size(); i++) {
if (emergethread[i]->IsSameThread())
return emergethread[i]->mapgen;
}
return NULL;
}
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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;
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int idx = 0;
if (allow_generate)
flags |= BLOCK_EMERGE_ALLOWGEN;
{
JMutexAutoLock queuelock(queuemutex);
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count = blocks_enqueued.size();
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if (count >= qlimit_total)
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return false;
count = peer_queue_count[peer_id];
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u16 qlimit_peer = allow_generate ? qlimit_generate : qlimit_diskonly;
if (count >= qlimit_peer)
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return false;
iter = blocks_enqueued.find(p);
if (iter != blocks_enqueued.end()) {
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bedata = iter->second;
bedata->flags |= flags;
return true;
}
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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
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int lowestitems = emergethread[0]->blockqueue.size();
for (unsigned int i = 1; i != emergethread.size(); i++) {
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int nitems = emergethread[i]->blockqueue.size();
if (nitems < lowestitems) {
idx = i;
lowestitems = nitems;
}
}
emergethread[idx]->blockqueue.push(p);
}
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emergethread[idx]->qevent.signal();
return true;
}
int EmergeManager::getGroundLevelAtPoint(v2s16 p) {
if (mapgen.size() == 0 || !mapgen[0]) {
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errorstream << "EmergeManager: getGroundLevelAtPoint() called"
" before mapgen initialized" << std::endl;
return 0;
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}
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 +
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p.X * 23;
}
Mapgen *EmergeManager::createMapgen(std::string mgname, int mgid,
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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;
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return mgfactory->createMapgen(mgid, mgparams, this);
}
MapgenParams *EmergeManager::createMapgenParams(std::string mgname) {
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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);
if (!mgparams)
return NULL;
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");
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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;
}
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////////////////////////////// Emerge Thread //////////////////////////////////
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bool EmergeThread::popBlockEmerge(v3s16 *pos, u8 *flags) {
std::map<v3s16, BlockEmergeData *>::iterator iter;
JMutexAutoLock queuelock(emerge->queuemutex);
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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!!
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BlockEmergeData *bedata = iter->second;
*flags = bedata->flags;
emerge->peer_queue_count[bedata->peer_requested]--;
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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");
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*b = block;
return map->initBlockMake(data, p);
}
*b = block;
return false;
}
void *EmergeThread::Thread() {
ThreadStarted();
log_register_thread("EmergeThread" + itos(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;
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mapgen = emerge->mapgen[id];
enable_mapgen_debug_info = emerge->mapgen_debug_info;
while (getRun())
try {
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if (!popBlockEmerge(&p, &flags)) {
qevent.wait();
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continue;
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}
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;
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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 "
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"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
SERVER_TO_SA(m_server)->environment_OnGenerated(
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)
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modified_blocks[p] = block;
// Set the modified blocks unsent for all the clients
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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;
}