src/client/clientlauncher.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 #include "gui/mainmenumanager.h"
  21 #include "clouds.h"
  22 #include "server.h"
  23 #include "filesys.h"
  24 #include "gui/guiMainMenu.h"
  25 #include "game.h"
  26 #include "player.h"
  27 #include "chat.h"
  28 #include "gettext.h"
  29 #include "profiler.h"
  30 #include "serverlist.h"
  31 #include "gui/guiEngine.h"
  32 #include "fontengine.h"
  33 #include "clientlauncher.h"
  34 #include "version.h"
  35 #include "renderingengine.h"
  36 #include "network/networkexceptions.h"
  37
  38 #if USE_SOUND
  39         #include "sound_openal.h"
  40 #endif
  41 #ifdef __ANDROID__
  42         #include "porting.h"
  43 #endif
  44
  45 /* mainmenumanager.h
  46  */
  47 gui::IGUIEnvironment *guienv = nullptr;
  48 gui::IGUIStaticText *guiroot = nullptr;
  49 MainMenuManager g_menumgr;
  50
  51 bool isMenuActive()
  52 {
  53         return g_menumgr.menuCount() != 0;
  54 }
  55
  56 // Passed to menus to allow disconnecting and exiting
  57 MainGameCallback *g_gamecallback = nullptr;
  58
  59 #if 0
  60 // This can be helpful for the next code cleanup
  61 static void dump_start_data(const GameStartData &data)
  62 {
  63         std::cout <<
  64                 "\ndedicated   " << (int)data.is_dedicated_server <<
  65                 "\nport        " << data.socket_port <<
  66                 "\nworld_path  " << data.world_spec.path <<
  67                 "\nworld game  " << data.world_spec.gameid <<
  68                 "\ngame path   " << data.game_spec.path <<
  69                 "\nplayer name " << data.name <<
  70                 "\naddress     " << data.address << std::endl;
  71 }
  72 #endif
  73
  74 ClientLauncher::~ClientLauncher()
  75 {
  76         delete receiver;
  77
  78         delete input;
  79
  80         delete g_fontengine;
  81         delete g_gamecallback;
  82
  83         delete RenderingEngine::get_instance();
  84
  85 #if USE_SOUND
  86         g_sound_manager_singleton.reset();
  87 #endif
  88 }
  89
  90
  91 bool ClientLauncher::run(GameStartData &start_data, const Settings &cmd_args)
  92 {
  93         /* This function is called when a client must be started.
  94          * Covered cases:
  95          *   - Singleplayer (address but map provided)
  96          *   - Join server (no map but address provided)
  97          *   - Local server (for main menu only)
  98         */
  99
 100         init_args(start_data, cmd_args);
 101
 102         // List video modes if requested
 103         if (list_video_modes)
 104                 return RenderingEngine::print_video_modes();
 105
 106 #if USE_SOUND
 107         if (g_settings->getBool("enable_sound"))
 108                 g_sound_manager_singleton = createSoundManagerSingleton();
 109 #endif
 110
 111         if (!init_engine()) {
 112                 errorstream << "Could not initialize game engine." << std::endl;
 113                 return false;
 114         }
 115
 116         // Speed tests (done after irrlicht is loaded to get timer)
 117         if (cmd_args.getFlag("speedtests")) {
 118                 dstream << "Running speed tests" << std::endl;
 119                 speed_tests();
 120                 return true;
 121         }
 122
 123         if (RenderingEngine::get_video_driver() == NULL) {
 124                 errorstream << "Could not initialize video driver." << std::endl;
 125                 return false;
 126         }
 127
 128         RenderingEngine::get_instance()->setupTopLevelWindow(PROJECT_NAME_C);
 129
 130         /*
 131                 This changes the minimum allowed number of vertices in a VBO.
 132                 Default is 500.
 133         */
 134         //driver->setMinHardwareBufferVertexCount(50);
 135
 136         // Create game callback for menus
 137         g_gamecallback = new MainGameCallback();
 138
 139         RenderingEngine::get_instance()->setResizable(true);
 140
 141         init_input();
 142
 143         RenderingEngine::get_scene_manager()->getParameters()->
 144                 setAttribute(scene::ALLOW_ZWRITE_ON_TRANSPARENT, true);
 145
 146         guienv = RenderingEngine::get_gui_env();
 147         skin = RenderingEngine::get_gui_env()->getSkin();
 148         skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255, 255, 255, 255));
 149         skin->setColor(gui::EGDC_3D_LIGHT, video::SColor(0, 0, 0, 0));
 150         skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(255, 30, 30, 30));
 151         skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(255, 0, 0, 0));
 152         skin->setColor(gui::EGDC_HIGH_LIGHT, video::SColor(255, 70, 120, 50));
 153         skin->setColor(gui::EGDC_HIGH_LIGHT_TEXT, video::SColor(255, 255, 255, 255));
 154 #ifdef __ANDROID__
 155         float density = porting::getDisplayDensity();
 156         skin->setSize(gui::EGDS_CHECK_BOX_WIDTH, (s32)(17.0f * density));
 157         skin->setSize(gui::EGDS_SCROLLBAR_SIZE, (s32)(14.0f * density));
 158         skin->setSize(gui::EGDS_WINDOW_BUTTON_WIDTH, (s32)(15.0f * density));
 159         if (density > 1.5f) {
 160                 std::string sprite_path = porting::path_user + "/textures/base/pack/";
 161                 if (density > 3.5f)
 162                         sprite_path.append("checkbox_64.png");
 163                 else if (density > 2.0f)
 164                         sprite_path.append("checkbox_32.png");
 165                 else
 166                         sprite_path.append("checkbox_16.png");
 167                 // Texture dimensions should be a power of 2
 168                 gui::IGUISpriteBank *sprites = skin->getSpriteBank();
 169                 video::IVideoDriver *driver = RenderingEngine::get_video_driver();
 170                 video::ITexture *sprite_texture = driver->getTexture(sprite_path.c_str());
 171                 if (sprite_texture) {
 172                         s32 sprite_id = sprites->addTextureAsSprite(sprite_texture);
 173                         if (sprite_id != -1)
 174                                 skin->setIcon(gui::EGDI_CHECK_BOX_CHECKED, sprite_id);
 175                 }
 176         }
 177 #endif
 178         g_fontengine = new FontEngine(g_settings, guienv);
 179         FATAL_ERROR_IF(g_fontengine == NULL, "Font engine creation failed.");
 180
 181 #if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
 182         // Irrlicht 1.8 input colours
 183         skin->setColor(gui::EGDC_EDITABLE, video::SColor(255, 128, 128, 128));
 184         skin->setColor(gui::EGDC_FOCUSED_EDITABLE, video::SColor(255, 96, 134, 49));
 185 #endif
 186
 187         // Create the menu clouds
 188         if (!g_menucloudsmgr)
 189                 g_menucloudsmgr = RenderingEngine::get_scene_manager()->createNewSceneManager();
 190         if (!g_menuclouds)
 191                 g_menuclouds = new Clouds(g_menucloudsmgr, -1, rand());
 192         g_menuclouds->setHeight(100.0f);
 193         g_menuclouds->update(v3f(0, 0, 0), video::SColor(255, 240, 240, 255));
 194         scene::ICameraSceneNode* camera;
 195         camera = g_menucloudsmgr->addCameraSceneNode(NULL, v3f(0, 0, 0), v3f(0, 60, 100));
 196         camera->setFarValue(10000);
 197
 198         /*
 199                 GUI stuff
 200         */
 201
 202         ChatBackend chat_backend;
 203
 204         // If an error occurs, this is set to something by menu().
 205         // It is then displayed before the menu shows on the next call to menu()
 206         std::string error_message;
 207         bool reconnect_requested = false;
 208
 209         bool first_loop = true;
 210
 211         /*
 212                 Menu-game loop
 213         */
 214         bool retval = true;
 215         bool *kill = porting::signal_handler_killstatus();
 216
 217         while (RenderingEngine::run() && !*kill &&
 218                 !g_gamecallback->shutdown_requested) {
 219                 // Set the window caption
 220                 const wchar_t *text = wgettext("Main Menu");
 221                 RenderingEngine::get_raw_device()->
 222                         setWindowCaption((utf8_to_wide(PROJECT_NAME_C) +
 223                         L" " + utf8_to_wide(g_version_hash) +
 224                         L" [" + text + L"]").c_str());
 225                 delete[] text;
 226
 227                 try {   // This is used for catching disconnects
 228
 229                         RenderingEngine::get_gui_env()->clear();
 230
 231                         /*
 232                                 We need some kind of a root node to be able to add
 233                                 custom gui elements directly on the screen.
 234                                 Otherwise they won't be automatically drawn.
 235                         */
 236                         guiroot = RenderingEngine::get_gui_env()->addStaticText(L"",
 237                                 core::rect<s32>(0, 0, 10000, 10000));
 238
 239                         bool game_has_run = launch_game(error_message, reconnect_requested,
 240                                 start_data, cmd_args);
 241
 242                         // Reset the reconnect_requested flag
 243                         reconnect_requested = false;
 244
 245                         // If skip_main_menu, we only want to startup once
 246                         if (skip_main_menu && !first_loop)
 247                                 break;
 248
 249                         first_loop = false;
 250
 251                         if (!game_has_run) {
 252                                 if (skip_main_menu)
 253                                         break;
 254
 255                                 continue;
 256                         }
 257
 258                         // Break out of menu-game loop to shut down cleanly
 259                         if (!RenderingEngine::get_raw_device()->run() || *kill) {
 260                                 if (!g_settings_path.empty())
 261                                         g_settings->updateConfigFile(g_settings_path.c_str());
 262                                 break;
 263                         }
 264
 265                         RenderingEngine::get_video_driver()->setTextureCreationFlag(
 266                                         video::ETCF_CREATE_MIP_MAPS, g_settings->getBool("mip_map"));
 267
 268 #ifdef HAVE_TOUCHSCREENGUI
 269                         receiver->m_touchscreengui = new TouchScreenGUI(RenderingEngine::get_raw_device(), receiver);
 270                         g_touchscreengui = receiver->m_touchscreengui;
 271 #endif
 272
 273                         the_game(
 274                                 kill,
 275                                 input,
 276                                 start_data,
 277                                 error_message,
 278                                 chat_backend,
 279                                 &reconnect_requested
 280                         );
 281                         RenderingEngine::get_scene_manager()->clear();
 282
 283 #ifdef HAVE_TOUCHSCREENGUI
 284                         delete g_touchscreengui;
 285                         g_touchscreengui = NULL;
 286                         receiver->m_touchscreengui = NULL;
 287 #endif
 288
 289                 } //try
 290                 catch (con::PeerNotFoundException &e) {
 291                         error_message = gettext("Connection error (timed out?)");
 292                         errorstream << error_message << std::endl;
 293                 }
 294
 295 #ifdef NDEBUG
 296                 catch (std::exception &e) {
 297                         std::string error_message = "Some exception: \"";
 298                         error_message += e.what();
 299                         error_message += "\"";
 300                         errorstream << error_message << std::endl;
 301                 }
 302 #endif
 303
 304                 // If no main menu, show error and exit
 305                 if (skip_main_menu) {
 306                         if (!error_message.empty()) {
 307                                 verbosestream << "error_message = "
 308                                               << error_message << std::endl;
 309                                 retval = false;
 310                         }
 311                         break;
 312                 }
 313         } // Menu-game loop
 314
 315         g_menuclouds->drop();
 316         g_menucloudsmgr->drop();
 317
 318         return retval;
 319 }
 320
 321 void ClientLauncher::init_args(GameStartData &start_data, const Settings &cmd_args)
 322 {
 323         skip_main_menu = cmd_args.getFlag("go");
 324
 325         start_data.address = g_settings->get("address");
 326         if (cmd_args.exists("address")) {
 327                 // Join a remote server
 328                 start_data.address = cmd_args.get("address");
 329                 start_data.world_path.clear();
 330         }
 331         if (!start_data.world_path.empty()) {
 332                 // Start a singleplayer instance
 333                 start_data.address = "";
 334         }
 335
 336         start_data.name = g_settings->get("name");
 337         if (cmd_args.exists("name"))
 338                 start_data.name = cmd_args.get("name");
 339
 340         list_video_modes = cmd_args.getFlag("videomodes");
 341
 342         random_input = g_settings->getBool("random_input")
 343                         || cmd_args.getFlag("random-input");
 344 }
 345
 346 bool ClientLauncher::init_engine()
 347 {
 348         receiver = new MyEventReceiver();
 349         new RenderingEngine(receiver);
 350         return RenderingEngine::get_raw_device() != nullptr;
 351 }
 352
 353 void ClientLauncher::init_input()
 354 {
 355         if (random_input)
 356                 input = new RandomInputHandler();
 357         else
 358                 input = new RealInputHandler(receiver);
 359
 360         if (g_settings->getBool("enable_joysticks")) {
 361                 irr::core::array<irr::SJoystickInfo> infos;
 362                 std::vector<irr::SJoystickInfo> joystick_infos;
 363
 364                 // Make sure this is called maximum once per
 365                 // irrlicht device, otherwise it will give you
 366                 // multiple events for the same joystick.
 367                 if (RenderingEngine::get_raw_device()->activateJoysticks(infos)) {
 368                         infostream << "Joystick support enabled" << std::endl;
 369                         joystick_infos.reserve(infos.size());
 370                         for (u32 i = 0; i < infos.size(); i++) {
 371                                 joystick_infos.push_back(infos[i]);
 372                         }
 373                         input->joystick.onJoystickConnect(joystick_infos);
 374                 } else {
 375                         errorstream << "Could not activate joystick support." << std::endl;
 376                 }
 377         }
 378 }
 379
 380 bool ClientLauncher::launch_game(std::string &error_message,
 381                 bool reconnect_requested, GameStartData &start_data,
 382                 const Settings &cmd_args)
 383 {
 384         // Prepare and check the start data to launch a game
 385         std::string error_message_lua = error_message;
 386         error_message.clear();
 387
 388         if (cmd_args.exists("password"))
 389                 start_data.password = cmd_args.get("password");
 390
 391         if (cmd_args.exists("password-file")) {
 392                 std::ifstream passfile(cmd_args.get("password-file"));
 393                 if (passfile.good()) {
 394                         getline(passfile, start_data.password);
 395                 } else {
 396                         error_message = gettext("Provided password file "
 397                                         "failed to open: ")
 398                                         + cmd_args.get("password-file");
 399                         errorstream << error_message << std::endl;
 400                         return false;
 401                 }
 402         }
 403
 404         // If a world was commanded, append and select it
 405         // This is provieded by "get_world_from_cmdline()", main.cpp
 406         if (!start_data.world_path.empty()) {
 407                 auto &spec = start_data.world_spec;
 408
 409                 spec.path = start_data.world_path;
 410                 spec.gameid = getWorldGameId(spec.path, true);
 411                 spec.name = _("[--world parameter]");
 412
 413                 if (spec.gameid.empty()) {      // Create new
 414                         spec.gameid = g_settings->get("default_game");
 415                         spec.name += " [new]";
 416                 }
 417         }
 418
 419         /* Show the GUI menu
 420          */
 421         std::string server_name, server_description;
 422         start_data.local_server = false;
 423         if (!skip_main_menu) {
 424                 // Initialize menu data
 425                 // TODO: Re-use existing structs (GameStartData)
 426                 MainMenuData menudata;
 427                 menudata.address                         = start_data.address;
 428                 menudata.name                            = start_data.name;
 429                 menudata.password                        = start_data.password;
 430                 menudata.port                            = itos(start_data.socket_port);
 431                 menudata.script_data.errormessage        = error_message_lua;
 432                 menudata.script_data.reconnect_requested = reconnect_requested;
 433
 434                 main_menu(&menudata);
 435
 436                 // Skip further loading if there was an exit signal.
 437                 if (*porting::signal_handler_killstatus())
 438                         return false;
 439
 440                 if (!menudata.script_data.errormessage.empty()) {
 441                         /* The calling function will pass this back into this function upon the
 442                          * next iteration (if any) causing it to be displayed by the GUI
 443                          */
 444                         error_message = menudata.script_data.errormessage;
 445                         return false;
 446                 }
 447
 448                 int newport = stoi(menudata.port);
 449                 if (newport != 0)
 450                         start_data.socket_port = newport;
 451
 452                 // Update world information using main menu data
 453                 std::vector<WorldSpec> worldspecs = getAvailableWorlds();
 454
 455                 int world_index = menudata.selected_world;
 456                 if (world_index >= 0 && world_index < (int)worldspecs.size()) {
 457                         g_settings->set("selected_world_path",
 458                                         worldspecs[world_index].path);
 459                         start_data.world_spec = worldspecs[world_index];
 460                 }
 461
 462                 start_data.name = menudata.name;
 463                 start_data.password = menudata.password;
 464                 start_data.address = std::move(menudata.address);
 465                 server_name = menudata.servername;
 466                 server_description = menudata.serverdescription;
 467
 468                 start_data.local_server = !menudata.simple_singleplayer_mode &&
 469                         start_data.address.empty();
 470         }
 471
 472         if (!RenderingEngine::run())
 473                 return false;
 474
 475         if (!start_data.isSinglePlayer() && start_data.name.empty()) {
 476                 error_message = gettext("Please choose a name!");
 477                 errorstream << error_message << std::endl;
 478                 return false;
 479         }
 480
 481         // If using simple singleplayer mode, override
 482         if (start_data.isSinglePlayer()) {
 483                 start_data.name = "singleplayer";
 484                 start_data.password = "";
 485                 start_data.socket_port = myrand_range(49152, 65535);
 486         } else {
 487                 g_settings->set("name", start_data.name);
 488                 if (!start_data.address.empty()) {
 489                         ServerListSpec server;
 490                         server["name"]        = server_name;
 491                         server["address"]     = start_data.address;
 492                         server["port"]        = itos(start_data.socket_port);
 493                         server["description"] = server_description;
 494                         ServerList::insert(server);
 495                 }
 496         }
 497
 498         if (start_data.name.length() > PLAYERNAME_SIZE - 1) {
 499                 error_message = gettext("Player name too long.");
 500                 start_data.name.resize(PLAYERNAME_SIZE);
 501                 g_settings->set("name", start_data.name);
 502                 return false;
 503         }
 504
 505         auto &worldspec = start_data.world_spec;
 506         infostream << "Selected world: " << worldspec.name
 507                    << " [" << worldspec.path << "]" << std::endl;
 508
 509         if (start_data.address.empty()) {
 510                 // For singleplayer and local server
 511                 if (worldspec.path.empty()) {
 512                         error_message = gettext("No world selected and no address "
 513                                         "provided. Nothing to do.");
 514                         errorstream << error_message << std::endl;
 515                         return false;
 516                 }
 517
 518                 if (!fs::PathExists(worldspec.path)) {
 519                         error_message = gettext("Provided world path doesn't exist: ")
 520                                         + worldspec.path;
 521                         errorstream << error_message << std::endl;
 522                         return false;
 523                 }
 524
 525                 // Load gamespec for required game
 526                 start_data.game_spec = findWorldSubgame(worldspec.path);
 527                 if (!start_data.game_spec.isValid()) {
 528                         error_message = gettext("Could not find or load game \"")
 529                                         + worldspec.gameid + "\"";
 530                         errorstream << error_message << std::endl;
 531                         return false;
 532                 }
 533
 534                 if (porting::signal_handler_killstatus())
 535                         return true;
 536
 537                 if (!start_data.game_spec.isValid()) {
 538                         error_message = gettext("Invalid gamespec.");
 539                         error_message += " (world.gameid=" + worldspec.gameid + ")";
 540                         errorstream << error_message << std::endl;
 541                         return false;
 542                 }
 543         }
 544
 545         start_data.world_path = start_data.world_spec.path;
 546         return true;
 547 }
 548
 549 void ClientLauncher::main_menu(MainMenuData *menudata)
 550 {
 551         bool *kill = porting::signal_handler_killstatus();
 552         video::IVideoDriver *driver = RenderingEngine::get_video_driver();
 553
 554         infostream << "Waiting for other menus" << std::endl;
 555         while (RenderingEngine::get_raw_device()->run() && !*kill) {
 556                 if (!isMenuActive())
 557                         break;
 558                 driver->beginScene(true, true, video::SColor(255, 128, 128, 128));
 559                 RenderingEngine::get_gui_env()->drawAll();
 560                 driver->endScene();
 561                 // On some computers framerate doesn't seem to be automatically limited
 562                 sleep_ms(25);
 563         }
 564         infostream << "Waited for other menus" << std::endl;
 565
 566         // Cursor can be non-visible when coming from the game
 567 #ifndef ANDROID
 568         RenderingEngine::get_raw_device()->getCursorControl()->setVisible(true);
 569 #endif
 570
 571         /* show main menu */
 572         GUIEngine mymenu(&input->joystick, guiroot, &g_menumgr, menudata, *kill);
 573
 574         /* leave scene manager in a clean state */
 575         RenderingEngine::get_scene_manager()->clear();
 576 }
 577
 578 void ClientLauncher::speed_tests()
 579 {
 580         // volatile to avoid some potential compiler optimisations
 581         volatile static s16 temp16;
 582         volatile static f32 tempf;
 583         static v3f tempv3f1;
 584         static v3f tempv3f2;
 585         static std::string tempstring;
 586         static std::string tempstring2;
 587
 588         tempv3f1 = v3f();
 589         tempv3f2 = v3f();
 590         tempstring.clear();
 591         tempstring2.clear();
 592
 593         {
 594                 infostream << "The following test should take around 20ms." << std::endl;
 595                 TimeTaker timer("Testing std::string speed");
 596                 const u32 jj = 10000;
 597                 for (u32 j = 0; j < jj; j++) {
 598                         tempstring = "";
 599                         tempstring2 = "";
 600                         const u32 ii = 10;
 601                         for (u32 i = 0; i < ii; i++) {
 602                                 tempstring2 += "asd";
 603                         }
 604                         for (u32 i = 0; i < ii+1; i++) {
 605                                 tempstring += "asd";
 606                                 if (tempstring == tempstring2)
 607                                         break;
 608                         }
 609                 }
 610         }
 611
 612         infostream << "All of the following tests should take around 100ms each."
 613                    << std::endl;
 614
 615         {
 616                 TimeTaker timer("Testing floating-point conversion speed");
 617                 tempf = 0.001;
 618                 for (u32 i = 0; i < 4000000; i++) {
 619                         temp16 += tempf;
 620                         tempf += 0.001;
 621                 }
 622         }
 623
 624         {
 625                 TimeTaker timer("Testing floating-point vector speed");
 626
 627                 tempv3f1 = v3f(1, 2, 3);
 628                 tempv3f2 = v3f(4, 5, 6);
 629                 for (u32 i = 0; i < 10000000; i++) {
 630                         tempf += tempv3f1.dotProduct(tempv3f2);
 631                         tempv3f2 += v3f(7, 8, 9);
 632                 }
 633         }
 634
 635         {
 636                 TimeTaker timer("Testing std::map speed");
 637
 638                 std::map<v2s16, f32> map1;
 639                 tempf = -324;
 640                 const s16 ii = 300;
 641                 for (s16 y = 0; y < ii; y++) {
 642                         for (s16 x = 0; x < ii; x++) {
 643                                 map1[v2s16(x, y)] =  tempf;
 644                                 tempf += 1;
 645                         }
 646                 }
 647                 for (s16 y = ii - 1; y >= 0; y--) {
 648                         for (s16 x = 0; x < ii; x++) {
 649                                 tempf = map1[v2s16(x, y)];
 650                         }
 651                 }
 652         }
 653
 654         {
 655                 infostream << "Around 5000/ms should do well here." << std::endl;
 656                 TimeTaker timer("Testing mutex speed");
 657
 658                 std::mutex m;
 659                 u32 n = 0;
 660                 u32 i = 0;
 661                 do {
 662                         n += 10000;
 663                         for (; i < n; i++) {
 664                                 m.lock();
 665                                 m.unlock();
 666                         }
 667                 }
 668                 // Do at least 10ms
 669                 while(timer.getTimerTime() < 10);
 670
 671                 u32 dtime = timer.stop();
 672                 u32 per_ms = n / dtime;
 673                 infostream << "Done. " << dtime << "ms, " << per_ms << "/ms" << std::endl;
 674         }
 675 }