Mercurial > projects > mde
annotate mde/setup/Init.d @ 137:9f035cd139c6
BIG commit. Major change: old Options class is gone, all content values are loaded and saved automatically. All options updated to reflect this, some changed.
Content restrutured a lot:
New IContent module, Content module includes more functionality.
New ContentLoader module to manage content loading/saving/translation.
Translation module moved to content dir and cut down to reflect current usage.
File format unchanged except renames: FontOptions -> Font, VideoOptions -> Screen.
Font render mode and LCD filter options are now enums.
GUI loading needs to create content (and set type for enums), but doesn't save/load value.
Some setup of mainSchedule moved to mde.mainLoop.
Content callbacks are called on content change now.
ContentLists are set up implicitly from content symbols. Not as fast but much easier!
Bug-fix in the new MTTagReader.
Renamed MT *Reader maker functions to avoid confusion in paths.d.
New mde.setup.logger module to allow logger setup before any other module's static this().
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Sat, 07 Feb 2009 12:46:03 +0000 |
parents | 4084f07f2c7a |
children | e785e98d3b78 |
rev | line source |
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20 | 1 /* LICENSE BLOCK |
2 Part of mde: a Modular D game-oriented Engine | |
3 Copyright © 2007-2008 Diggory Hardy | |
4 | |
26
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5 This program is free software: you can redistribute it and/or modify it under the terms |
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6 of the GNU General Public License as published by the Free Software Foundation, either |
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7 version 2 of the License, or (at your option) any later version. |
20 | 8 |
9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; | |
10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 See the GNU General Public License for more details. | |
12 | |
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13 You should have received a copy of the GNU General Public License |
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
20 | 15 |
16 /************************************************************************************************** | |
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17 * Initialisation and cleanup (shutdown) module. |
20 | 18 * |
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19 * Program startup follows this sequence: static this() functions, pre-init, init. |
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20 * Shutdown consists of: cleanup, post-cleanup, static ~this() functions. |
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21 * |
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22 * static this and ~this functions should not use any external resources, such as dynamically |
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23 * loaded libraries or files, and should not interact with other modules. They should be almost |
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24 * guaranteed not to fail. Preferably, they shouldn't involve large amounts of memory or |
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25 * processing, but this is not a requirement. |
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26 * |
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27 * Pre-init: init code written in this module. Generally only prerequisets of most other stages |
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28 * go here. |
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29 * |
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30 * Init: This is where init code from external modules gets hooked in. Each stage consists of an |
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31 * initialization function, a corresponding cleanup function, a state, and any dependencies (other |
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32 * init functions which must be run before this one). Init functions are run according to these |
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33 * dependencies, potentially threaded simultaeneously with other init functions. |
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34 * |
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35 * Cleanup: Cleanup happens similarly to init for all stages requiring shutdown (according to their |
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36 * state). The init dependencies are applied in reverse order (so if X depended on Y, Y's cleanup |
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37 * will not run until X's cleanup has completed), and again the functions may be threaded. |
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38 * |
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39 * Post-cleanup: like pre-init, this is code written in Init. |
20 | 40 *************************************************************************************************/ |
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41 module mde.setup.Init; |
20 | 42 |
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43 import mde.setup.InitStage; // Controls external delegates run by init |
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44 import mde.setup.exception; |
137
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45 import mde.setup.logger; |
20 | 46 |
137
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47 import mde.content.AStringContent; |
9f035cd139c6
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48 import mde.content.ContentLoader; |
134
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Moved mde.setup.paths to mde.file.paths and paths.mdeReader to mde.file.mergetag.Reader.MTMultiReader.
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49 import paths = mde.file.paths; |
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50 import mde.exception; // optionsLoadException |
127
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2 fixes for ldc - not that I was able to compile anyway (x86_64).
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51 import imde = mde.imde; |
20 | 52 |
53 // tango imports | |
54 import tango.core.Thread; | |
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55 import tango.core.sync.Condition; |
20 | 56 import tango.core.Exception; |
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Shared alignment for dynamic content lists - finally implemented! Lots of smaller changes too.
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57 import tango.util.container.LinkedList; |
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58 |
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59 //import tango.stdc.stringz : fromStringz; |
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60 import tango.io.Console; // for printing command-line usage |
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61 import TimeStamp = tango.text.convert.TimeStamp, tango.time.WallClock; // output date in log file |
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62 import tango.util.Arguments; |
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63 import tango.util.log.Log; |
67
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Changes to work with tango r3700 (post 0.99.6).
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64 import tango.util.log.AppendConsole; |
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65 import tango.util.log.AppendFiles; |
20 | 66 |
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67 // Derelict imports |
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68 import derelict.opengl.gl; |
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69 import derelict.sdl.sdl; |
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Bit of polish for a public release, including some more documentation.
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70 //import derelict.sdl.image; Was to be used... for now isn't |
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Major changes to the scheduler, previously only used by the main loop.
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71 import derelict.freetype.ft; |
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72 import derelict.util.exception; |
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73 |
20 | 74 |
137
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75 /****************************************************************************** |
20 | 76 * Init class |
77 * | |
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78 * A scope class created at beginning of the program and destroyed at the end; |
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79 * thus the CTOR handles program initialisation and the DTOR handles program |
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80 * cleanup. |
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81 *****************************************************************************/ |
20 | 82 scope class Init |
83 { | |
84 static this() { | |
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85 logger = Log.getLogger ("mde.setup.Init"); |
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86 exitImmediately = new BoolContent ("MiscOptions.exitImmediately"); |
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87 maxThreads = new IntContent ("MiscOptions.maxThreads"); |
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88 logLevel = new EnumContent ("MiscOptions.logLevel", |
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89 ["Trace", "Info", "Warn", "Error", "Fatal", "None"]); |
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90 logOutput = new EnumContent ("MiscOptions.logOutput", |
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91 ["none", "console", "file", "both"]); |
20 | 92 } |
93 | |
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94 /** this() − pre-init and init */ |
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95 this(char[][] cmdArgs) |
20 | 96 { |
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97 /********************************************************************** |
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98 * Pre-init - init code written in this module. |
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99 *********************************************************************/ |
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100 debug logger.trace ("Init: starting pre-init"); |
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101 //FIXME: warn on invalid arguments, including base-path on non-Windows |
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102 // But Arguments doesn't support this (in tango 0.99.6 and in r3563). |
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103 Arguments args; |
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104 try { |
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105 args = new Arguments(); |
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106 args.define("base-path").parameters(1); |
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107 args.define("data-path").parameters(1,-1); |
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108 args.define("conf-path").parameters(1,-1); |
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109 args.define("font-path").parameters(1,-1); |
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110 args.define("paths"); |
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111 args.define("q").aliases(["quick-exit"]); |
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112 args.define("help").aliases(["h"]); |
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113 args.parse(cmdArgs); |
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114 if (args.contains("help")) // lazy way to print help |
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115 throw new InitException ("Help requested"); // and stop |
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116 } catch (Exception e) { |
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117 printUsage(cmdArgs[0]); |
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118 throw new InitException ("Parsing arguments failed: "~e.msg); |
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119 } |
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120 |
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121 // Find/create paths: |
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122 try { |
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123 if (args.contains("data-path")) |
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124 paths.extraDataPath = args["data-path"]; |
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125 if (args.contains("conf-path")) |
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126 paths.extraConfPath = args["conf-path"]; |
135
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127 if (args.contains("font-path")) |
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128 paths.addFontPath (args["font-path"]); |
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129 |
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130 if (args.contains("base-path")) |
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131 paths.resolvePaths (args["base-path"]); |
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132 else |
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133 paths.resolvePaths(); |
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134 } catch (Exception e) { |
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135 throw new InitException ("Resolving paths failed: " ~ e.msg); |
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136 } |
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137 if (args.contains("paths")) { |
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138 paths.mdeDirectory.printPaths; |
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139 throw new InitException ("Paths requested"); // lazy way to stop |
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140 } |
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141 debug logger.trace ("Init: resolved paths successfully"); |
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142 |
20 | 143 /* Load options now. Don't load in a thread since: |
53
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144 * Loading should be fast & most work is probably disk access |
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145 * It enables logging to be controlled by options |
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146 * It's a really good idea to let the options apply to all other loading */ |
20 | 147 try { |
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148 ContentLoader.load(); |
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149 } catch (Exception e) { |
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150 throw new InitException ("Loading options (content values) failed: " ~ e.msg); |
20 | 151 } |
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152 debug logger.trace ("Init: loaded options successfully"); |
20 | 153 |
53
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154 // Set up the logger: |
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155 Logger root; |
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156 try { |
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157 // Where logging is done to is determined at compile-time, currently just via static ifs. |
67
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158 root = Log.root; |
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159 root.clear; // we may no longer want to log to the console |
53
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160 |
115
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161 // Now re-set the logging level and add callback to set on change: |
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162 setLogLevel (); |
137
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163 logLevel.addCallback (&setLogLevel); |
53
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164 |
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165 if (logOutput() & 2) { // first appender so root seperator messages don't show on console |
98
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166 // Use 2 log files with a maximum size of 16kiB: |
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167 root.add (new AppendFiles (paths.logDir~"/log-.txt", 2, 16*1024)); |
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168 root.append (Level.None, ""); // some kind of separation between runs |
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169 root.append (Level.None, ""); |
53
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170 } |
137
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171 if (logOutput() & 1) |
67
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172 root.add(new AppendConsole); |
53
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173 logger.info ("Starting mde [no version] on " ~ TimeStamp.toString(WallClock.now)); |
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174 } catch (Exception e) { |
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175 // Presumably it was only adding a file appender which failed; set up a new console |
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176 // logger and if that fails let the exception kill the program. |
67
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177 root.clear; |
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178 root.add (new AppendConsole); |
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179 logger.warn ("Exception while setting up the logger; logging to the console instead."); |
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180 } |
20 | 181 |
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182 // a debugging option: |
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183 imde.run = !args.contains("q") && !exitImmediately(); |
53
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184 debug logger.trace ("Init: applied pre-init options"); |
29
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185 |
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186 //BEGIN Load dynamic libraries |
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187 /* Can be done by init functions but much neater to do here. |
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188 * Also means that init functions aren't run if a library fails to load. */ |
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189 try { |
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190 DerelictSDL.load(); |
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191 // SDLImage was going to be used... for now it isn't because of gl texturing problems |
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192 //DerelictSDLImage.load(); |
29
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193 DerelictGL.load(); |
30
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Major changes to the scheduler, previously only used by the main loop.
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194 DerelictFT.load(); |
29
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195 } catch (DerelictException de) { |
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196 logger.fatal ("Loading dynamic library failed:"); |
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197 logger.fatal (de.msg); |
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198 |
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199 throw new InitException ("Loading dynamic libraries failed (see above)."); |
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200 } |
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201 debug logger.trace ("Init: dynamic libraries loaded"); |
29
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202 //END Load dynamic libraries |
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203 |
20 | 204 |
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205 /********************************************************************** |
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206 * Init − where init code from external modules gets hooked in. |
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207 *********************************************************************/ |
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208 debug logger.trace ("Init: done pre-init, starting init stages"); |
20 | 209 |
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210 // Calculate reverse dependencies of stages: |
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211 foreach (key,stage_p; stages) |
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212 foreach (name; stage_p.depends) |
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213 stages[name].rdepends ~= key; |
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214 |
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215 runStages!(true); // startup delegates |
20 | 216 |
24
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217 debug logger.trace ("Init: done"); |
20 | 218 } |
219 | |
220 /** DTOR - runs cleanup functions. */ | |
221 ~this() | |
222 { | |
24
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223 debug logger.trace ("Cleanup: starting"); |
20 | 224 |
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225 runStages!(false); // cleanup delegates |
20 | 226 |
137
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227 ContentLoader.save(); // save options before exiting |
20 | 228 |
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229 debug logger.trace ("Cleanup: done"); |
20 | 230 } |
231 | |
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232 // run init stages or cleanup if startup is false |
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233 private static void runStages(bool startup) () { |
91
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Shared alignment for dynamic content lists - finally implemented! Lots of smaller changes too.
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234 auto toRun = new LinkedList!(InitStage*); |
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235 foreach (v; stages) { |
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236 // Filter only stages with the relevant delegate. It is not checked later that the |
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237 // delegate exists! |
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238 // If no init/cleanup function exists, implicit activation/deactivation can occur so |
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239 // that dependents/dependencies may activate/deactivate. |
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240 static if (startup) { |
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241 if (v.state == StageState.INACTIVE) { |
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242 if ((*v).init) |
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243 toRun.append (v); |
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244 else |
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245 v.state = StageState.ACTIVE; |
20 | 246 } |
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247 } else { |
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248 if (v.state == StageState.ACTIVE) { |
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249 if (v.cleanup) |
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250 toRun.append (v); |
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251 else |
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252 v.state = StageState.INACTIVE; |
20 | 253 } |
254 } | |
255 } | |
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256 // Counts number of active threads, and before threads are started is number to use: |
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257 size_t numWorking = (toRun.size < maxThreads()) ? toRun.size : maxThreads(); |
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258 enum STATE { WORKING = 0, DONE = 1, ABORT = 2 } |
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259 STATE doneInit = STATE.WORKING; |
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260 Mutex toRunM = new Mutex; // synchronization on toRun, numWorking |
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261 Condition toRunC = new Condition(toRunM); // used by threads waiting for remaining stages' dependencies to be met |
20 | 262 |
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263 /* initThreadFct is now in a class to allow reliably identifying whcich instance is run in the main thread. |
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264 * The main thread gets index 0, other threads indexes 2,3,4,etc. (there is no 1). */ |
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265 class InitStageThread : Thread { |
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266 this (int n) { |
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267 debug threadNum = n; |
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268 super (&initThreadFct); |
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269 } |
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270 debug int threadNum; |
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271 /* This is a threadable member function to run init stages. |
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272 * Operation follows: |
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273 * 1 Look for a stage to run: |
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274 * if found: |
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275 * notify waiting threads work may be available |
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276 * init stage |
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277 * goto 1 |
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278 * if not found: |
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279 * if any other threads are working, wait (dependencies may not be met yet) |
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280 * if no other threads are working, notify waiting threads and terminate (finished) |
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281 * When notified, threads start at 1. */ |
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282 void initThreadFct () { |
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283 try { // created as a thread - must not throw exceptions |
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284 InitStage* stage; |
20 | 285 |
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286 threadLoop: |
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287 while (true) { // thread loops until a problem occurs or nothing else can be done |
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288 // Look for a job: |
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289 synchronized (toRunM) { |
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290 --numWorking; // stopped working: looking/waiting for a job |
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291 if (doneInit) break threadLoop; // something went wrong in another thread |
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292 |
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293 static if (startup) |
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294 int num_rdepends = (stage is null) ? 0 : stage.rdepends.length; |
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295 else |
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296 int num_rdepends = (stage is null) ? 0 : stage.depends.length; |
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297 |
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298 getStage: |
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299 while (true) { |
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300 auto toRunIt = toRun.iterator; // iterates toRun |
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301 itStages: |
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302 while (toRunIt.next (stage)) { // get next element of toRun |
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303 debug assert (stage !is null, "stage is null"); |
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304 static if (startup) { |
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305 foreach (d; stage.depends) |
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306 if (stages[d].state != StageState.ACTIVE) |
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307 continue itStages; // dependency isn't met (yet) |
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308 } else { |
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309 foreach (d; stage.rdepends) |
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310 if (stages[d].state != StageState.INACTIVE) |
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311 continue itStages; // reverse dependency isn't unmet (yet) |
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312 } |
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313 |
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314 // All dependencies met |
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315 debug assert (toRun.size, "toRun is empty (error with iterator)"); |
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316 toRunIt.remove; |
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317 break getStage; |
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318 } |
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319 |
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320 // No stage remaining with all dependencies met |
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321 if (toRun.size && numWorking) // still some working so more dependencies may be met later |
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322 toRunC.wait; // wait until another thread finishes |
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323 else // no thread is working, so none of what's left is doable, or nothing's left |
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324 break threadLoop; |
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325 } |
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326 ++numWorking; // got a job! |
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327 if (num_rdepends > 2) // how many stages depended on the last one run? |
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328 toRunC.notifyAll(); // tell all waiting threads there may be work now |
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329 else if (num_rdepends == 2) |
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330 toRunC.notify(); // there's potentially work for this thread and one other |
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331 // else there won't be additional work so don't notify |
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332 } |
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333 |
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334 // Do a job: |
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335 try { |
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336 static if (startup) { |
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337 debug logger.trace ("({}) InitStage {}: starting init", threadNum, stage.name); |
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338 stage.state = (*stage).init(); // init is a property too :-( |
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339 } else { |
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340 debug logger.trace ("({}) InitStage {}: starting cleanup", threadNum, stage.name); |
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341 stage.state = stage.cleanup(); |
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342 } |
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343 debug logger.trace ("({}) InitStage {}: completed; state: {}", threadNum, stage.name, stage.state); |
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344 } catch (InitStageException e) { |
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345 debug logger.error ("({}) InitStage {}: failed: "~e.msg, threadNum, stage.name); |
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346 else logger.error ("InitStage {}: failed: "~e.msg, stage.name); |
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347 stage.state = e.state; |
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348 doneInit = STATE.ABORT; |
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349 break threadLoop; |
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350 } catch (Exception e) { |
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351 debug logger.error ("({}) InitStage {}: failed: "~e.msg, threadNum, stage.name); |
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352 else logger.error ("InitStage {}: failed: "~e.msg, stage.name); |
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353 doneInit = STATE.ABORT; |
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354 break threadLoop; |
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355 } |
20 | 356 } |
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357 } catch (Exception e) { |
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358 logger.fatal ("Exception in initThreadFct: "~e.msg); |
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359 doneInit = STATE.ABORT; |
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360 } |
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361 doneInit |= STATE.DONE; // allow other threads a faster exit |
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362 toRunC.notifyAll(); // Most likely if we're exiting, we should make sure others aren't waiting. |
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363 return; |
20 | 364 } |
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365 } |
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366 |
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Solved some/removed some obsolete jobs/FIXMEs (excluding from gui code). General cleanup.
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367 // Start min(miscOpts.maxThreads,toRun.size)-1 threads: |
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368 try { |
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369 ThreadGroup g = new ThreadGroup; |
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370 InitStageThread x; |
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371 for (size_t i = numWorking; i > 1; --i) { |
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372 //g.create (&initThreadFct); |
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373 x = new InitStageThread (i); |
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374 x.start; |
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375 g.add (x); |
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376 } |
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377 x = new InitStageThread (0); |
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378 x.initThreadFct(); // also run in current thread |
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379 g.joinAll (false); // don't rethrow exceptions - there SHOULD NOT be any |
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380 } catch (ThreadException e) { |
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381 logger.error ("Exception while using threads: "~e.msg); |
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382 logger.error ("Disabling threads and attempting to continue."); |
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383 maxThreads = 1; // count includes current thread |
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384 auto x = new InitStageThread (0); |
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385 x.initThreadFct(); // try with just this thread |
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386 } // any other exception will be caught in main() and abort program |
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387 |
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388 if (doneInit & STATE.ABORT) |
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389 throw new InitException ("An init/cleanup function failed (see above message(s))"); |
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390 |
88
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391 if (toRun.size) |
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392 foreach (stage; toRun) |
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393 logger.warn ("InitStage {}: was not run due to unmet dependencies", stage.name); |
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394 } |
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395 |
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396 private static { |
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397 Logger logger; |
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398 BoolContent exitImmediately; |
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399 IntContent maxThreads; |
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400 EnumContent logLevel, logOutput; |
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401 |
137
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402 // Callback on logLevel |
115
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403 void setLogLevel (Content = null) { |
137
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404 Log.root.level (logOutput() == 0 ? Level.None : cast(Level) logLevel(), true); |
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405 } |
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406 |
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407 void printUsage (char[] progName) { |
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408 Cout ("mde [no version]").newline; |
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409 Cout ("Usage:").newline; |
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410 Cout (progName ~ ` [options]`).newline; |
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411 version(Windows) |
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412 Cout ( |
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413 ` --base-path path Use path as the base (install) path (Windows only). It |
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414 should contain the "data" directory.`).newline; |
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415 Cout ( |
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416 ` --data-path path(s) Add path(s) as a potential location for data files. |
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417 First path argument becomes the preffered location to |
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418 load data files from. |
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419 --conf-path path(s) Add path(s) as a potential location for config files. |
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420 Configuration in the first path given take highest |
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421 priority. |
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422 --paths Print all paths found and exit. |
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423 --quick-exit, -q Exit immediately, without entering main loop. |
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424 --help, -h Print this message.`).newline; |
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425 } |
20 | 426 } |
427 | |
428 debug (mdeUnitTest) unittest { | |
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429 auto realInit = stages; // backup the real init stages |
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430 stages = new typeof(stages); // an empty test-bed |
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431 |
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432 bool init1, init2, init3 = true; |
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433 StageState s1InitReturns = StageState.ACTIVE; |
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434 addInitStage ("stg1", delegate StageState() { |
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435 init1 = true; |
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436 return s1InitReturns; |
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437 }, delegate StageState() { |
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438 init1 = false; |
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439 return StageState.INACTIVE; |
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440 }); |
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441 addInitStage ("stg2", delegate StageState() { |
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442 assert (init1); |
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443 init2 = true; |
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444 return StageState.ACTIVE; |
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445 }, delegate StageState() { |
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446 assert (init1); |
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447 init2 = false; |
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448 return StageState.INACTIVE; |
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449 }, ["stg1"]); |
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450 InitStage s3; |
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451 s3.init = delegate StageState() { |
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452 throw new InitStageException (cast(StageState)7); // not a normal state, but good for a test |
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453 return StageState.ERROR; |
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454 }; |
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455 s3.cleanup = delegate StageState() { |
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456 assert (init1); |
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457 init3 = false; |
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458 return StageState.INACTIVE; |
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459 }; |
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460 s3.depends = [ toStageName("stg1") ]; |
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461 s3.state = StageState.ACTIVE; // already active, so s3.init should not run (first time) |
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462 addInitStage ("stg3", &s3); |
20 | 463 |
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464 // Stuff normally done in Init.this(): |
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465 // Calculate reverse dependencies of stages: |
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466 foreach (key,stage_p; stages) |
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467 foreach (name; stage_p.depends) |
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468 stages[name].rdepends ~= key; |
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469 int realMaxThreads = maxThreads(); |
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470 maxThreads = 4; // force up to 4 threads for unittest |
85
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471 |
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472 logger.level(Logger.Info); // hide a lot of trace messages |
136
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Added simpler mergetag readers and writers, with unittest.
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473 logger.info ("You should see some messages about InitStages not run/failing:"); |
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474 // Run the above. |
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475 runStages!(true); |
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476 assert (init1); |
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477 assert (init2); |
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478 foreach (s; stages) |
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479 assert (s.state == StageState.ACTIVE); |
20 | 480 |
85
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481 runStages!(false); |
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482 assert (!init1); |
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483 assert (!init2); |
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484 assert (!init3); |
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485 foreach (s; stages) |
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486 assert (s.state == StageState.INACTIVE); |
20 | 487 |
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488 s1InitReturns = StageState.ERROR; |
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489 // Run again. S2/S3 shouldn't run, S1 won't shut down |
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490 runStages!(true); |
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491 assert (init1); |
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492 assert (!init2); |
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493 assert (!init3); |
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494 runStages!(false); |
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495 assert (init1); // S1 cleanup won't run |
20 | 496 |
85
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497 stages[toStageName("stg1")].state = StageState.INACTIVE; // hack it back so we can still test |
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498 s1InitReturns = StageState.ACTIVE; |
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499 init1 = false; |
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500 bool a1 = false; |
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501 try { |
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502 runStages!(true); |
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503 a1 = true; |
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504 } catch (Exception e) {} |
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505 assert (!a1, "runStages didn't throw"); |
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506 assert (init1); // s1.init should run first; s2.init may or may not get run |
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507 assert (stages[toStageName("stg3")].state == cast(StageState)7); // set by the exception |
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508 |
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509 stages = realInit; // restore the real init stages |
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510 maxThreads = realMaxThreads; |
20 | 511 logger.info ("Unittest complete."); |
512 } | |
513 } |