Mercurial > projects > mde
annotate mde/scheduler/Init.d @ 53:f000d6cd0f74
Changes to paths, command line arguments and font LCD rendering.
Use "./" instead of "" as default install dir on windows.
Implemented a command-line argument parser.
Changes to LCD filter/render-mode option handling after testing what actually happens.
Changed some FontTexture messages and internals.
author | Diggory Hardy <diggory.hardy@gmail.com> |
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date | Thu, 05 Jun 2008 17:16:52 +0100 |
parents | 0fd51d2c6c8a |
children | f3d8c0441408 |
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 | |
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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 /************************************************************************************************** | |
17 * Initialisation setup and exit cleanup module. | |
18 * | |
19 * This module provides an infrastructure for handling much of the initialisation and | |
20 * deinitialisation of the program. It does not, however, provide much of the (de)initialisation | |
21 * code; with the exception of that for the logger. | |
22 *************************************************************************************************/ | |
23 module mde.scheduler.Init; | |
24 | |
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25 import mde.scheduler.init2; // This module is responsible for setting up some init functions. |
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26 import mde.scheduler.initFunctions; |
20 | 27 import mde.scheduler.exception; |
28 | |
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29 import mde.Options; |
20 | 30 import paths = mde.resource.paths; |
31 import mde.exception; | |
32 | |
33 // tango imports | |
34 import tango.core.Thread; | |
35 import tango.core.Exception; | |
36 import tango.stdc.stringz : fromStringz; | |
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37 import tango.io.Console; // for printing command-line usage |
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38 import TimeStamp = tango.text.convert.TimeStamp, tango.time.WallClock; // output date in log file |
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39 import tango.util.Arguments; |
20 | 40 import tango.util.log.Log : Log, Logger; |
41 import tango.util.log.ConsoleAppender : ConsoleAppender; | |
42 | |
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43 //version = SwitchAppender; |
20 | 44 version (SwitchAppender) { // My own variation, currently just a test |
45 import tango.util.log.SwitchingFileAppender : SwitchingFileAppender; | |
46 } else { | |
47 import tango.util.log.RollingFileAppender : RollingFileAppender; | |
48 } | |
49 | |
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50 // Derelict imports |
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51 import derelict.opengl.gl; |
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52 import derelict.sdl.sdl; |
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53 import derelict.freetype.ft; |
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54 import derelict.util.exception; |
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55 |
20 | 56 /** |
57 * Static CTOR | |
58 * | |
59 * This should handle a minimal amount of functionality where useful. For instance, configuring the | |
60 * logger here and not in Init allows unittests to use the logger. | |
61 */ | |
62 static this() | |
63 { | |
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64 Logger root = Log.getRootLogger(); |
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65 // Set the level here, but set it again once options have been loaded: |
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66 debug root.setLevel(root.Level.Trace); |
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67 else root.setLevel(root.Level.Info); |
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68 // Temporarily log to the console (until we've found paths and loaded options): |
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69 root.addAppender(new ConsoleAppender); |
20 | 70 } |
71 static ~this() | |
72 { | |
73 } | |
74 | |
75 /** | |
76 * Init class | |
77 * | |
78 * A scope class created at beginning of the program and destroyed at the end; thus the CTOR | |
79 * handles program initialisation and the DTOR handles program cleanup. | |
80 */ | |
81 scope class Init | |
82 { | |
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83 //private bool failure = false; // set true on failure during init, so that clean |
20 | 84 private static Logger logger; |
85 static this() { | |
86 logger = Log.getLogger ("mde.scheduler.Init.Init"); | |
87 } | |
88 | |
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89 /** this() − initialisation |
20 | 90 * |
91 * Runs general initialisation code, in a threaded manner where this isn't difficult. | |
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92 * If any init fails, cleanup is still handled by ~this(). |
20 | 93 * |
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94 * Init order: 1. Pre-init (loads components needed by most init functions). 2. Dynamic library |
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95 * loading (load any dynamic libraries first, so that if loading fails nothing else need be |
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96 * done). 3. Init functions (threaded functions handling the rest of initialisation). |
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97 */ |
20 | 98 /* In a single-threaded function this could be done with: |
99 * scope(failure) cleanup; | |
100 * This won't work with a threaded init function since any threads completing succesfully will | |
101 * not clean-up, and a fixed list of clean-up functions cannot be used since clean-up functions | |
102 * must not run where the initialisation functions have failed. | |
103 * Hence a list of clean-up functions is built similarly to scope(failure) --- see addCleanupFct. | |
104 */ | |
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105 this(char[][] cmdArgs) |
20 | 106 { |
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107 debug logger.trace ("Init: starting"); |
20 | 108 |
109 //BEGIN Pre-init (stage init0) | |
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110 //FIXME: warn on invalid arguments, including base-path on non-Windows |
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111 // But Arguments doesn't support this (in tango 0.99.6 and in r3563). |
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112 Arguments args; |
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113 try { |
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114 args = new Arguments(); |
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115 args.define("base-path").parameters(1); |
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116 args.define("data-path").parameters(1,-1); |
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117 args.define("conf-path").parameters(1,-1); |
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118 args.define("paths"); |
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119 args.define("q").aliases(["quick-exit"]); |
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120 args.define("help").aliases(["h"]); |
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121 args.parse(cmdArgs); |
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122 if (args.contains("help")) // lazy way to print help |
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123 throw new InitException ("Help requested"); // and stop |
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124 } catch (Exception e) { |
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125 printUsage(cmdArgs[0]); |
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126 throw new InitException ("Parsing arguments failed: "~e.msg); |
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127 } |
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128 |
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129 // Find/create paths: |
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130 try { |
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131 if (args.contains("data-path")) |
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132 paths.extraDataPath = args["data-path"]; |
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133 if (args.contains("conf-path")) |
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134 paths.extraConfPath = args["conf-path"]; |
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135 if (args.contains("base-path")) |
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136 paths.resolvePaths (args["base-path"]); |
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137 else |
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138 paths.resolvePaths(); |
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139 } catch (Exception e) { |
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140 throw new InitException ("Resolving paths failed: " ~ e.msg); |
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141 } |
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142 if (args.contains("paths")) { |
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143 paths.mdeDirectory.printPaths; |
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144 throw new InitException ("Paths requested"); // lazy way to stop |
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145 } |
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146 debug logger.trace ("Init: resolved paths successfully"); |
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147 |
20 | 148 /* Load options now. Don't load in a thread since: |
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149 * Loading should be fast & most work is probably disk access |
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150 * It enables logging to be controlled by options |
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151 * It's a really good idea to let the options apply to all other loading */ |
20 | 152 try { |
153 Options.load(); | |
154 } catch (optionsLoadException e) { | |
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155 throw new InitException ("Loading options failed: " ~ e.msg); |
20 | 156 } |
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157 debug logger.trace ("Init: loaded options successfully"); |
20 | 158 |
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159 // Set up the logger: |
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160 Logger root; |
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161 try { |
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162 enum LOG { |
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163 LEVEL = 0x10, // mask for log level |
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164 CONSOLE = 0x1001, // log to console? |
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165 ROLLFILE= 0x1002 // use Rolling/Switching File Appender? |
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166 } |
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167 |
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168 // Where logging is done to is determined at compile-time, currently just via static ifs. |
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169 root = Log.getRootLogger(); |
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170 root.clearAppenders; // we may no longer want to log to the console |
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171 |
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172 // Now re-set the logging level, using the value from the config file: |
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173 Log.getRootLogger.setLevel (cast(Log.Level) (miscOpts.logOptions & LOG.LEVEL), true); |
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174 |
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175 // Log to a file (first appender so root seperator messages don't show on console): |
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176 if (miscOpts.logOptions & LOG.ROLLFILE) { |
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177 version (SwitchAppender) { |
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178 root.addAppender (new SwitchingFileAppender (paths.logDir~"/log-.txt", 5)); |
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179 } else { |
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180 // Use 2 log files with a maximum size of 1 MB: |
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181 root.addAppender (new RollingFileAppender (paths.logDir~"/log-.txt", 2, 1024*1024)); |
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182 root.info (""); // some kind of separation between runs |
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183 root.info (""); |
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184 } |
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185 } else if (!(miscOpts.logOptions & LOG.CONSOLE)) { |
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186 // make sure at least one logger is enabled |
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187 Options.setInt ("misc", "logOptions", miscOpts.logOptions | LOG.CONSOLE); |
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188 } |
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189 if (miscOpts.logOptions & LOG.CONSOLE) { // Log to the console |
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190 root.addAppender(new ConsoleAppender); |
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191 } |
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192 logger.info ("Starting mde [no version] on " ~ TimeStamp.toString(WallClock.now)); |
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193 } catch (Exception e) { |
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194 // Presumably it was only adding a file appender which failed; set up a new console |
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195 // logger and if that fails let the exception kill the program. |
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196 root.clearAppenders; |
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197 root.addAppender (new ConsoleAppender); |
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198 logger.warn ("Exception while setting up the logger; logging to the console instead."); |
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199 } |
20 | 200 |
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201 // a debugging option: |
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202 imde.run = !args.contains("q") && !miscOpts.exitImmediately; |
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203 debug logger.trace ("Init: applied pre-init options"); |
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204 |
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205 //BEGIN Load dynamic libraries |
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206 /* Can be done by init functions but much neater to do here. |
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207 * Also means that init functions aren't run if a library fails to load. */ |
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208 try { |
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209 DerelictSDL.load(); |
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210 DerelictGL.load(); |
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211 DerelictFT.load(); |
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212 } catch (DerelictException de) { |
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213 logger.fatal ("Loading dynamic library failed:"); |
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214 logger.fatal (de.msg); |
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215 |
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216 throw new InitException ("Loading dynamic libraries failed (see above)."); |
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217 } |
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218 debug logger.trace ("Init: dynamic libraries loaded"); |
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219 //END Load dynamic libraries |
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220 //END Pre-init |
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221 |
20 | 222 |
223 //BEGIN Init (stages init2, init4) | |
224 /* Call init functions. | |
225 * | |
226 * Current method is to try using threads, and on failure assume no threads were actually | |
227 * created and run functions in a non-threaded manner. */ | |
228 | |
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229 try { |
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230 if (runStageThreaded (init)) runStageForward (init); |
20 | 231 } |
232 catch (InitStageException) { // This init stage failed. | |
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233 // FIXME: check DTOR still runs |
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234 throw new InitException ("An init function failed (see above message(s))"); |
20 | 235 } |
236 //END Init | |
237 | |
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238 debug logger.trace ("Init: done"); |
20 | 239 } |
240 | |
241 /** DTOR - runs cleanup functions. */ | |
242 ~this() | |
243 { | |
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244 debug logger.trace ("Cleanup: starting"); |
20 | 245 |
246 Options.save(); // save options... do so here for now | |
247 | |
25
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248 // General cleanup: |
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249 try { |
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250 if (runStageThreaded (cleanup)) runStageReverse (cleanup); |
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251 } |
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252 catch (InitStageException) { |
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253 // Nothing else to do but report: |
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254 logger.error ("One or more cleanup functions failed!"); |
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255 } |
20 | 256 |
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257 debug logger.trace ("Cleanup: done"); |
20 | 258 } |
259 | |
260 | |
261 //BEGIN runStage... | |
262 private static { | |
263 /* The following three functions, runStage*, each run all functions in a stage in some order, | |
264 * catching any exceptions thrown by the functions (although this isn't guaranteed for threads), | |
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265 * and throw an InitStageException on initFailure. */ |
20 | 266 |
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267 const LOG_IF_MSG = "Init function "; |
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268 const LOG_CF_MSG = "Cleanup function "; |
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269 const LOG_F_START = " - running"; |
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270 const LOG_F_END = " - completed"; |
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271 const LOG_F_BAD = " - failed"; |
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272 const LOG_F_FAIL = " - failed: "; |
20 | 273 /* Runs all functions consecutively, first-to-last. |
274 * If any function fails, halts immediately. */ | |
275 void runStageForward (InitStage s) { | |
276 foreach (func; s.funcs) { | |
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277 if (initFailure) break; |
20 | 278 try { |
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279 debug logger.trace (LOG_IF_MSG ~ func.name ~ LOG_F_START); |
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280 func.func(); |
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281 debug logger.trace (LOG_IF_MSG ~ func.name ~ (initFailure ? LOG_F_BAD : LOG_F_END)); |
20 | 282 } catch (Exception e) { |
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283 logger.fatal (LOG_IF_MSG ~ func.name ~ LOG_F_FAIL ~ |
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284 ((e.msg is null || e.msg == "") ? "(no failure message)" : e.msg) ); |
20 | 285 |
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286 setInitFailure(); |
20 | 287 } |
288 } | |
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289 |
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290 if (initFailure) throw new InitStageException; // Problem running; abort and cleanup from here. |
20 | 291 } |
292 /* Runs all functions consecutively, last-to-first. | |
293 * If any function fails, continue until all have been run. */ | |
294 void runStageReverse (InitStage s) { | |
295 foreach_reverse (func; s.funcs) { | |
296 try { | |
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297 debug logger.trace (LOG_CF_MSG ~ func.name ~ LOG_F_START); |
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298 func.func(); |
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299 debug logger.trace (LOG_CF_MSG ~ func.name ~ (initFailure ? LOG_F_BAD : LOG_F_END)); |
20 | 300 } catch (Exception e) { |
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301 logger.fatal (LOG_CF_MSG ~ func.name ~ LOG_F_FAIL ~ |
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302 ((e.msg is null || e.msg == "") ? "(no failure message)" : e.msg) ); |
20 | 303 |
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304 setInitFailure(); |
20 | 305 } |
306 } | |
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307 if (initFailure) throw new InitStageException; // Problem running; abort and cleanup from here. |
20 | 308 } |
309 /* Tries running functions in a threaded way. Returns false if successful, true if not but | |
310 * functions should be run without threads. */ | |
311 bool runStageThreaded (InitStage s) { | |
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312 if (!miscOpts.useThreads) return true; // Use unthreaded route instead |
20 | 313 |
314 ThreadGroup tg; | |
315 try { // creating/starting threads could fail | |
316 tg = new ThreadGroup; | |
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317 foreach (func; s.funcs) { // Start all threads |
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318 debug logger.trace (LOG_IF_MSG ~ func.name ~ LOG_F_START); |
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319 tg.create(func.func); |
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320 debug logger.trace (LOG_IF_MSG ~ func.name ~ (initFailure ? LOG_F_BAD : LOG_F_END)); |
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321 } |
20 | 322 } catch (ThreadException e) { // Problem with threading; try without threads |
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323 logger.error ("Caught ThreadException while trying to create threads:"); |
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324 logger.error (e.msg); |
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325 logger.info ("Will disable threads and continue, assuming no threads were created."); |
20 | 326 |
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327 Options.setBool("misc", "useThreads", false); // Disable threads entirely |
20 | 328 return true; // Try again without threads |
329 } | |
330 | |
331 /* Wait for all threads to complete. | |
332 * | |
333 * If something went wrong, we still need to do this before cleaning up. | |
334 */ | |
335 foreach (t; tg) { | |
336 try { | |
337 t.join (true); | |
338 } catch (Exception e) { | |
339 // Relying on catching exceptions thrown by other threads is a bad idea. | |
340 // Hence all threads should catch their own exceptions and return safely. | |
341 | |
342 logger.fatal ("Unhandled exception from Init function:"); | |
343 logger.fatal (e.msg); | |
344 | |
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345 setInitFailure (); // abort (but join other threads first) |
20 | 346 } |
347 } | |
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348 |
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349 if (initFailure) throw new InitStageException; // Problem running; abort and cleanup from here. |
20 | 350 return false; // Done successfully |
351 } | |
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352 //END runStage... |
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353 |
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354 void printUsage (char[] progName) { |
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355 Cout ("mde [no version]").newline; |
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356 Cout ("Usage:").newline; |
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357 Cout (progName ~ ` [options]`).newline; |
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358 version(Windows) |
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359 Cout ( |
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360 ` --base-path path Use path as the base (install) path (Windows only). It |
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361 should contain the "data" directory.`).newline; |
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362 Cout ( |
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363 ` --data-path path(s) Add path(s) as a potential location for data files. |
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364 First path argument becomes the preffered location to |
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365 load data files from. |
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366 --conf-path path(s) Add path(s) as a potential location for config files. |
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367 Configuration in the first path given take highest |
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368 priority. |
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369 --paths Print all paths found and exit. |
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370 --quick-exit, -q Exit immediately, without entering main loop. |
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371 --help, -h Print this message.`).newline; |
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372 } |
20 | 373 } |
374 | |
375 debug (mdeUnitTest) unittest { | |
376 /* Fake init and cleanup. Use unittest-specific init and cleanup InitStages to avoid | |
377 * messing other init/cleanup up. */ | |
378 static InitStage initUT, cleanupUT; | |
379 | |
380 static bool initialised = false; | |
381 static void cleanupFunc1 () { | |
382 initialised = false; | |
383 } | |
384 static void cleanupFunc2 () { | |
385 assert (initialised == true); | |
386 } | |
387 | |
388 static void initFunc () { | |
389 initialised = true; | |
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390 cleanupUT.addFunc (&cleanupFunc1, "UT cleanup 1"); |
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391 cleanupUT.addFunc (&cleanupFunc2, "UT cleanup 2"); |
20 | 392 } |
393 | |
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394 initUT.addFunc (&initFunc, "UT init"); |
20 | 395 |
396 runStageForward (initUT); | |
397 assert (initialised); | |
398 | |
399 runStageReverse (cleanupUT); | |
400 assert (!initialised); | |
401 | |
402 logger.info ("Unittest complete."); | |
403 } | |
404 } |