mirror of
https://github.com/moparisthebest/minetest
synced 2024-12-22 23:58:48 -05:00
708 lines
16 KiB
C++
708 lines
16 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "emerge.h"
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#include <iostream>
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#include <queue>
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#include "util/container.h"
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#include "util/thread.h"
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#include "threading/event.h"
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#include "config.h"
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#include "constants.h"
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#include "environment.h"
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#include "log.h"
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#include "map.h"
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#include "mapblock.h"
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#include "mapgen_flat.h"
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#include "mapgen_fractal.h"
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#include "mapgen_v5.h"
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#include "mapgen_v6.h"
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#include "mapgen_v7.h"
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#include "mapgen_singlenode.h"
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#include "mg_biome.h"
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#include "mg_ore.h"
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#include "mg_decoration.h"
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#include "mg_schematic.h"
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#include "nodedef.h"
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#include "profiler.h"
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#include "scripting_game.h"
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#include "server.h"
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#include "serverobject.h"
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#include "settings.h"
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#include "voxel.h"
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struct MapgenDesc {
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const char *name;
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MapgenFactory *factory;
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bool is_user_visible;
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};
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class EmergeThread : public Thread {
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public:
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bool enable_mapgen_debug_info;
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int id;
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EmergeThread(Server *server, int ethreadid);
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~EmergeThread();
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void *run();
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void signal();
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// Requires queue mutex held
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bool pushBlock(v3s16 pos);
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void cancelPendingItems();
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static void runCompletionCallbacks(
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v3s16 pos, EmergeAction action,
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const EmergeCallbackList &callbacks);
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private:
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Server *m_server;
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ServerMap *m_map;
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EmergeManager *m_emerge;
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Mapgen *m_mapgen;
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Event m_queue_event;
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std::queue<v3s16> m_block_queue;
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bool popBlockEmerge(v3s16 *pos, BlockEmergeData *bedata);
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EmergeAction getBlockOrStartGen(
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v3s16 pos, bool allow_gen, MapBlock **block, BlockMakeData *data);
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MapBlock *finishGen(v3s16 pos, BlockMakeData *bmdata,
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std::map<v3s16, MapBlock *> *modified_blocks);
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friend class EmergeManager;
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};
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////
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//// Built-in mapgens
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////
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MapgenDesc g_reg_mapgens[] = {
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{"v5", new MapgenFactoryV5, true},
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{"v6", new MapgenFactoryV6, true},
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{"v7", new MapgenFactoryV7, true},
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{"flat", new MapgenFactoryFlat, false},
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{"fractal", new MapgenFactoryFractal, false},
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{"singlenode", new MapgenFactorySinglenode, false},
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};
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////
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//// EmergeManager
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////
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EmergeManager::EmergeManager(IGameDef *gamedef)
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{
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this->ndef = gamedef->getNodeDefManager();
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this->biomemgr = new BiomeManager(gamedef);
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this->oremgr = new OreManager(gamedef);
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this->decomgr = new DecorationManager(gamedef);
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this->schemmgr = new SchematicManager(gamedef);
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this->gen_notify_on = 0;
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// Note that accesses to this variable are not synchronized.
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// This is because the *only* thread ever starting or stopping
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// EmergeThreads should be the ServerThread.
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this->m_threads_active = false;
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enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
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// If unspecified, leave a proc for the main thread and one for
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// some other misc thread
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s16 nthreads = 0;
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if (!g_settings->getS16NoEx("num_emerge_threads", nthreads))
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nthreads = Thread::getNumberOfProcessors() - 2;
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if (nthreads < 1)
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nthreads = 1;
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m_qlimit_total = g_settings->getU16("emergequeue_limit_total");
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if (!g_settings->getU16NoEx("emergequeue_limit_diskonly", m_qlimit_diskonly))
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m_qlimit_diskonly = nthreads * 5 + 1;
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if (!g_settings->getU16NoEx("emergequeue_limit_generate", m_qlimit_generate))
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m_qlimit_generate = nthreads + 1;
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// don't trust user input for something very important like this
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if (m_qlimit_total < 1)
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m_qlimit_total = 1;
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if (m_qlimit_diskonly < 1)
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m_qlimit_diskonly = 1;
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if (m_qlimit_generate < 1)
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m_qlimit_generate = 1;
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for (s16 i = 0; i < nthreads; i++)
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m_threads.push_back(new EmergeThread((Server *)gamedef, i));
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infostream << "EmergeManager: using " << nthreads << " threads" << std::endl;
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}
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EmergeManager::~EmergeManager()
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{
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for (u32 i = 0; i != m_threads.size(); i++) {
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EmergeThread *thread = m_threads[i];
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if (m_threads_active) {
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thread->stop();
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thread->signal();
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thread->wait();
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}
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delete thread;
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delete m_mapgens[i];
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}
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delete biomemgr;
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delete oremgr;
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delete decomgr;
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delete schemmgr;
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delete params.sparams;
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}
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void EmergeManager::loadMapgenParams()
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{
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params.load(*g_settings);
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}
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void EmergeManager::initMapgens()
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{
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if (m_mapgens.size())
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return;
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MapgenFactory *mgfactory = getMapgenFactory(params.mg_name);
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if (!mgfactory) {
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errorstream << "EmergeManager: mapgen " << params.mg_name <<
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" not registered; falling back to " << DEFAULT_MAPGEN << std::endl;
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params.mg_name = DEFAULT_MAPGEN;
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mgfactory = getMapgenFactory(params.mg_name);
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FATAL_ERROR_IF(mgfactory == NULL, "Couldn't use any mapgen!");
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}
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if (!params.sparams) {
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params.sparams = mgfactory->createMapgenParams();
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params.sparams->readParams(g_settings);
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}
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for (u32 i = 0; i != m_threads.size(); i++) {
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Mapgen *mg = mgfactory->createMapgen(i, ¶ms, this);
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m_mapgens.push_back(mg);
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}
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}
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Mapgen *EmergeManager::getCurrentMapgen()
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{
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for (u32 i = 0; i != m_threads.size(); i++) {
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if (m_threads[i]->isCurrentThread())
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return m_threads[i]->m_mapgen;
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}
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return NULL;
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}
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void EmergeManager::startThreads()
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{
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if (m_threads_active)
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return;
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for (u32 i = 0; i != m_threads.size(); i++)
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m_threads[i]->start();
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m_threads_active = true;
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}
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void EmergeManager::stopThreads()
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{
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if (!m_threads_active)
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return;
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// Request thread stop in parallel
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for (u32 i = 0; i != m_threads.size(); i++) {
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m_threads[i]->stop();
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m_threads[i]->signal();
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}
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// Then do the waiting for each
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for (u32 i = 0; i != m_threads.size(); i++)
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m_threads[i]->wait();
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m_threads_active = false;
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}
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bool EmergeManager::isRunning()
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{
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return m_threads_active;
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}
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bool EmergeManager::enqueueBlockEmerge(
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u16 peer_id,
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v3s16 blockpos,
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bool allow_generate,
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bool ignore_queue_limits)
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{
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u16 flags = 0;
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if (allow_generate)
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flags |= BLOCK_EMERGE_ALLOW_GEN;
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if (ignore_queue_limits)
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flags |= BLOCK_EMERGE_FORCE_QUEUE;
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return enqueueBlockEmergeEx(blockpos, peer_id, flags, NULL, NULL);
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}
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bool EmergeManager::enqueueBlockEmergeEx(
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v3s16 blockpos,
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u16 peer_id,
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u16 flags,
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EmergeCompletionCallback callback,
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void *callback_param)
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{
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EmergeThread *thread = NULL;
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{
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MutexAutoLock queuelock(m_queue_mutex);
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if (!pushBlockEmergeData(blockpos, peer_id, flags,
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callback, callback_param))
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return false;
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thread = getOptimalThread();
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thread->pushBlock(blockpos);
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}
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thread->signal();
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return true;
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}
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//
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// Mapgen-related helper functions
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//
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v3s16 EmergeManager::getContainingChunk(v3s16 blockpos)
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{
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return getContainingChunk(blockpos, params.chunksize);
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}
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v3s16 EmergeManager::getContainingChunk(v3s16 blockpos, s16 chunksize)
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{
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s16 coff = -chunksize / 2;
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v3s16 chunk_offset(coff, coff, coff);
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return getContainerPos(blockpos - chunk_offset, chunksize)
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* chunksize + chunk_offset;
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}
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int EmergeManager::getGroundLevelAtPoint(v2s16 p)
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{
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if (m_mapgens.size() == 0 || !m_mapgens[0]) {
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errorstream << "EmergeManager: getGroundLevelAtPoint() called"
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" before mapgen init" << std::endl;
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return 0;
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}
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return m_mapgens[0]->getGroundLevelAtPoint(p);
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}
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bool EmergeManager::isBlockUnderground(v3s16 blockpos)
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{
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#if 0
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v2s16 p = v2s16((blockpos.X * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2,
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(blockpos.Y * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2);
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int ground_level = getGroundLevelAtPoint(p);
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return blockpos.Y * (MAP_BLOCKSIZE + 1) <= min(water_level, ground_level);
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#endif
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// Use a simple heuristic; the above method is wildly inaccurate anyway.
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return blockpos.Y * (MAP_BLOCKSIZE + 1) <= params.water_level;
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}
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void EmergeManager::getMapgenNames(
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std::vector<const char *> *mgnames, bool include_hidden)
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{
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for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
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if (include_hidden || g_reg_mapgens[i].is_user_visible)
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mgnames->push_back(g_reg_mapgens[i].name);
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}
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}
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MapgenFactory *EmergeManager::getMapgenFactory(const std::string &mgname)
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{
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for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
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if (mgname == g_reg_mapgens[i].name)
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return g_reg_mapgens[i].factory;
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}
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return NULL;
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}
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bool EmergeManager::pushBlockEmergeData(
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v3s16 pos,
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u16 peer_requested,
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u16 flags,
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EmergeCompletionCallback callback,
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void *callback_param)
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{
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u16 &count_peer = m_peer_queue_count[peer_requested];
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if ((flags & BLOCK_EMERGE_FORCE_QUEUE) == 0) {
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if (m_blocks_enqueued.size() >= m_qlimit_total)
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return false;
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if (peer_requested != PEER_ID_INEXISTENT) {
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u16 qlimit_peer = (flags & BLOCK_EMERGE_ALLOW_GEN) ?
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m_qlimit_generate : m_qlimit_diskonly;
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if (count_peer >= qlimit_peer)
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return false;
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}
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}
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std::pair<std::map<v3s16, BlockEmergeData>::iterator, bool> findres;
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findres = m_blocks_enqueued.insert(std::make_pair(pos, BlockEmergeData()));
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BlockEmergeData &bedata = findres.first->second;
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bool update_existing = !findres.second;
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if (callback)
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bedata.callbacks.push_back(std::make_pair(callback, callback_param));
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if (update_existing) {
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bedata.flags |= flags;
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} else {
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bedata.flags = flags;
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bedata.peer_requested = peer_requested;
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count_peer++;
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}
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return true;
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}
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bool EmergeManager::popBlockEmergeData(
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v3s16 pos,
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BlockEmergeData *bedata)
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{
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std::map<v3s16, BlockEmergeData>::iterator it;
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std::map<u16, u16>::iterator it2;
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it = m_blocks_enqueued.find(pos);
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if (it == m_blocks_enqueued.end())
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return false;
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*bedata = it->second;
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it2 = m_peer_queue_count.find(bedata->peer_requested);
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if (it2 == m_peer_queue_count.end())
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return false;
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u16 &count_peer = it2->second;
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assert(count_peer != 0);
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count_peer--;
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m_blocks_enqueued.erase(it);
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return true;
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}
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EmergeThread *EmergeManager::getOptimalThread()
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{
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size_t nthreads = m_threads.size();
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FATAL_ERROR_IF(nthreads == 0, "No emerge threads!");
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size_t index = 0;
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size_t nitems_lowest = m_threads[0]->m_block_queue.size();
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for (size_t i = 1; i < nthreads; i++) {
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size_t nitems = m_threads[i]->m_block_queue.size();
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if (nitems < nitems_lowest) {
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index = i;
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nitems_lowest = nitems;
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}
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}
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return m_threads[index];
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}
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////
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//// EmergeThread
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////
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EmergeThread::EmergeThread(Server *server, int ethreadid) :
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enable_mapgen_debug_info(false),
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id(ethreadid),
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m_server(server),
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m_map(NULL),
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m_emerge(NULL),
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m_mapgen(NULL)
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{
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m_name = "Emerge-" + itos(ethreadid);
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}
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EmergeThread::~EmergeThread()
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{
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//cancelPendingItems();
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}
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void EmergeThread::signal()
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{
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m_queue_event.signal();
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}
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bool EmergeThread::pushBlock(v3s16 pos)
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{
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m_block_queue.push(pos);
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return true;
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}
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void EmergeThread::cancelPendingItems()
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{
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MutexAutoLock queuelock(m_emerge->m_queue_mutex);
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while (!m_block_queue.empty()) {
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BlockEmergeData bedata;
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v3s16 pos;
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pos = m_block_queue.front();
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m_block_queue.pop();
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m_emerge->popBlockEmergeData(pos, &bedata);
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runCompletionCallbacks(pos, EMERGE_CANCELLED, bedata.callbacks);
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}
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}
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void EmergeThread::runCompletionCallbacks(
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v3s16 pos,
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EmergeAction action,
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const EmergeCallbackList &callbacks)
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{
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for (size_t i = 0; i != callbacks.size(); i++) {
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EmergeCompletionCallback callback;
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void *param;
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callback = callbacks[i].first;
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param = callbacks[i].second;
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callback(pos, action, param);
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}
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}
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bool EmergeThread::popBlockEmerge(v3s16 *pos, BlockEmergeData *bedata)
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{
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MutexAutoLock queuelock(m_emerge->m_queue_mutex);
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if (m_block_queue.empty())
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return false;
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*pos = m_block_queue.front();
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m_block_queue.pop();
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m_emerge->popBlockEmergeData(*pos, bedata);
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return true;
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}
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EmergeAction EmergeThread::getBlockOrStartGen(
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v3s16 pos, bool allow_gen, MapBlock **block, BlockMakeData *bmdata)
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{
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MutexAutoLock envlock(m_server->m_env_mutex);
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// 1). Attempt to fetch block from memory
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*block = m_map->getBlockNoCreateNoEx(pos);
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if (*block && !(*block)->isDummy() && (*block)->isGenerated())
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return EMERGE_FROM_MEMORY;
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// 2). Attempt to load block from disk
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*block = m_map->loadBlock(pos);
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if (*block && (*block)->isGenerated())
|
|
return EMERGE_FROM_DISK;
|
|
|
|
// 3). Attempt to start generation
|
|
if (allow_gen && m_map->initBlockMake(pos, bmdata))
|
|
return EMERGE_GENERATED;
|
|
|
|
// All attempts failed; cancel this block emerge
|
|
return EMERGE_CANCELLED;
|
|
}
|
|
|
|
|
|
MapBlock *EmergeThread::finishGen(v3s16 pos, BlockMakeData *bmdata,
|
|
std::map<v3s16, MapBlock *> *modified_blocks)
|
|
{
|
|
MutexAutoLock envlock(m_server->m_env_mutex);
|
|
ScopeProfiler sp(g_profiler,
|
|
"EmergeThread: after Mapgen::makeChunk", SPT_AVG);
|
|
|
|
/*
|
|
Perform post-processing on blocks (invalidate lighting, queue liquid
|
|
transforms, etc.) to finish block make
|
|
*/
|
|
m_map->finishBlockMake(bmdata, modified_blocks);
|
|
|
|
MapBlock *block = m_map->getBlockNoCreateNoEx(pos);
|
|
if (!block) {
|
|
errorstream << "EmergeThread::finishGen: Couldn't grab block we "
|
|
"just generated: " << PP(pos) << std::endl;
|
|
return NULL;
|
|
}
|
|
|
|
v3s16 minp = bmdata->blockpos_min * MAP_BLOCKSIZE;
|
|
v3s16 maxp = bmdata->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));
|
|
|
|
/*
|
|
Run Lua on_generated callbacks
|
|
*/
|
|
try {
|
|
m_server->getScriptIface()->environment_OnGenerated(
|
|
minp, maxp, m_mapgen->blockseed);
|
|
} catch (LuaError &e) {
|
|
m_server->setAsyncFatalError("Lua: " + std::string(e.what()));
|
|
}
|
|
|
|
EMERGE_DBG_OUT("ended up with: " << analyze_block(block));
|
|
|
|
/*
|
|
Activate the block
|
|
*/
|
|
m_server->m_env->activateBlock(block, 0);
|
|
|
|
return block;
|
|
}
|
|
|
|
|
|
void *EmergeThread::run()
|
|
{
|
|
DSTACK(FUNCTION_NAME);
|
|
BEGIN_DEBUG_EXCEPTION_HANDLER
|
|
|
|
v3s16 pos;
|
|
|
|
m_map = (ServerMap *)&(m_server->m_env->getMap());
|
|
m_emerge = m_server->m_emerge;
|
|
m_mapgen = m_emerge->m_mapgens[id];
|
|
enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
|
|
|
|
try {
|
|
while (!stopRequested()) {
|
|
std::map<v3s16, MapBlock *> modified_blocks;
|
|
BlockEmergeData bedata;
|
|
BlockMakeData bmdata;
|
|
EmergeAction action;
|
|
MapBlock *block;
|
|
|
|
if (!popBlockEmerge(&pos, &bedata)) {
|
|
m_queue_event.wait();
|
|
continue;
|
|
}
|
|
|
|
if (blockpos_over_limit(pos))
|
|
continue;
|
|
|
|
bool allow_gen = bedata.flags & BLOCK_EMERGE_ALLOW_GEN;
|
|
EMERGE_DBG_OUT("pos=" PP(pos) " allow_gen=" << allow_gen);
|
|
|
|
action = getBlockOrStartGen(pos, allow_gen, &block, &bmdata);
|
|
if (action == EMERGE_GENERATED) {
|
|
{
|
|
ScopeProfiler sp(g_profiler,
|
|
"EmergeThread: Mapgen::makeChunk", SPT_AVG);
|
|
TimeTaker t("mapgen::make_block()");
|
|
|
|
m_mapgen->makeChunk(&bmdata);
|
|
|
|
if (enable_mapgen_debug_info == false)
|
|
t.stop(true); // Hide output
|
|
}
|
|
|
|
block = finishGen(pos, &bmdata, &modified_blocks);
|
|
}
|
|
|
|
runCompletionCallbacks(pos, action, bedata.callbacks);
|
|
|
|
if (block)
|
|
modified_blocks[pos] = block;
|
|
|
|
if (modified_blocks.size() > 0)
|
|
m_server->SetBlocksNotSent(modified_blocks);
|
|
}
|
|
} catch (VersionMismatchException &e) {
|
|
std::ostringstream err;
|
|
err << "World data version mismatch in MapBlock " << PP(pos) << std::endl
|
|
<< "----" << std::endl
|
|
<< "\"" << e.what() << "\"" << std::endl
|
|
<< "See debug.txt." << std::endl
|
|
<< "World probably saved by a newer version of " PROJECT_NAME_C "."
|
|
<< std::endl;
|
|
m_server->setAsyncFatalError(err.str());
|
|
} catch (SerializationError &e) {
|
|
std::ostringstream err;
|
|
err << "Invalid data in MapBlock " << PP(pos) << std::endl
|
|
<< "----" << std::endl
|
|
<< "\"" << e.what() << "\"" << std::endl
|
|
<< "See debug.txt." << std::endl
|
|
<< "You can ignore this using [ignore_world_load_errors = true]."
|
|
<< std::endl;
|
|
m_server->setAsyncFatalError(err.str());
|
|
}
|
|
|
|
END_DEBUG_EXCEPTION_HANDLER
|
|
return NULL;
|
|
}
|