1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | #include "OgreStableHeaders.h" |
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30 | #include "OgreResourceBackgroundQueue.h" |
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31 | #include "OgreLogManager.h" |
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32 | #include "OgreException.h" |
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33 | #include "OgreResourceGroupManager.h" |
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34 | #include "OgreResourceManager.h" |
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35 | #include "OgreRoot.h" |
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36 | #include "OgreRenderSystem.h" |
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37 | |
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38 | namespace Ogre { |
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39 | |
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40 | //------------------------------------------------------------------------ |
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41 | //----------------------------------------------------------------------- |
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42 | template<> ResourceBackgroundQueue* Singleton<ResourceBackgroundQueue>::ms_Singleton = 0; |
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43 | ResourceBackgroundQueue* ResourceBackgroundQueue::getSingletonPtr(void) |
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44 | { |
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45 | return ms_Singleton; |
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46 | } |
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47 | ResourceBackgroundQueue& ResourceBackgroundQueue::getSingleton(void) |
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48 | { |
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49 | assert( ms_Singleton ); return ( *ms_Singleton ); |
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50 | } |
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51 | //----------------------------------------------------------------------- |
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52 | //------------------------------------------------------------------------ |
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53 | ResourceBackgroundQueue::ResourceBackgroundQueue() |
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54 | :mNextTicketID(0), mStartThread(true), mThread(0) |
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55 | #if OGRE_THREAD_SUPPORT |
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56 | , mShuttingDown(false) |
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57 | #endif |
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58 | { |
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59 | } |
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60 | //------------------------------------------------------------------------ |
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61 | ResourceBackgroundQueue::~ResourceBackgroundQueue() |
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62 | { |
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63 | shutdown(); |
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64 | } |
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65 | //------------------------------------------------------------------------ |
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66 | void ResourceBackgroundQueue::initialise(void) |
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67 | { |
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68 | #if OGRE_THREAD_SUPPORT |
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69 | if (mStartThread) |
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70 | { |
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71 | { |
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72 | OGRE_LOCK_AUTO_MUTEX |
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73 | mShuttingDown = false; |
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74 | } |
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75 | |
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76 | RenderSystem* rs = Root::getSingleton().getRenderSystem(); |
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77 | |
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78 | LogManager::getSingleton().logMessage( |
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79 | "ResourceBackgroundQueue - threading enabled, starting own thread"); |
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80 | { |
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81 | OGRE_LOCK_MUTEX_NAMED(initMutex, initLock) |
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82 | |
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83 | // Call thread creation pre-hook |
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84 | rs->preExtraThreadsStarted(); |
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85 | |
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86 | mThread = new boost::thread( |
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87 | boost::function0<void>(&ResourceBackgroundQueue::threadFunc)); |
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88 | // Wait for init to finish before allowing main thread to continue |
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89 | // this releases the initMutex until notified |
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90 | OGRE_THREAD_WAIT(initSync, initLock) |
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91 | |
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92 | // Call thread creation post-hook |
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93 | rs->postExtraThreadsStarted(); |
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94 | } |
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95 | |
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96 | } |
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97 | else |
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98 | { |
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99 | LogManager::getSingleton().logMessage( |
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100 | "ResourceBackgroundQueue - threading enabled, user thread"); |
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101 | } |
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102 | #else |
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103 | LogManager::getSingleton().logMessage( |
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104 | "ResourceBackgroundQueue - threading disabled"); |
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105 | #endif |
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106 | } |
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107 | //------------------------------------------------------------------------ |
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108 | void ResourceBackgroundQueue::shutdown(void) |
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109 | { |
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110 | #if OGRE_THREAD_SUPPORT |
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111 | if (mThread) |
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112 | { |
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113 | // Put a shutdown request on the queue |
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114 | Request req; |
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115 | req.type = RT_SHUTDOWN; |
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116 | addRequest(req); |
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117 | // Wait for thread to finish |
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118 | mThread->join(); |
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119 | delete mThread; |
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120 | mThread = 0; |
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121 | mRequestQueue.clear(); |
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122 | mRequestTicketMap.clear(); |
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123 | } |
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124 | #endif |
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125 | } |
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126 | //------------------------------------------------------------------------ |
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127 | BackgroundProcessTicket ResourceBackgroundQueue::initialiseResourceGroup( |
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128 | const String& name, ResourceBackgroundQueue::Listener* listener) |
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129 | { |
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130 | #if OGRE_THREAD_SUPPORT |
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131 | if (!mThread && mStartThread) |
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132 | { |
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133 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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134 | "Thread not initialised", |
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135 | "ResourceBackgroundQueue::initialiseResourceGroup"); |
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136 | } |
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137 | // queue a request |
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138 | Request req; |
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139 | req.type = RT_INITIALISE_GROUP; |
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140 | req.groupName = name; |
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141 | req.listener = listener; |
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142 | return addRequest(req); |
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143 | #else |
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144 | // synchronous |
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145 | ResourceGroupManager::getSingleton().initialiseResourceGroup(name); |
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146 | return 0; |
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147 | #endif |
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148 | } |
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149 | //------------------------------------------------------------------------ |
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150 | BackgroundProcessTicket |
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151 | ResourceBackgroundQueue::initialiseAllResourceGroups( |
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152 | ResourceBackgroundQueue::Listener* listener) |
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153 | { |
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154 | #if OGRE_THREAD_SUPPORT |
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155 | if (!mThread && mStartThread) |
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156 | { |
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157 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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158 | "Thread not initialised", |
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159 | "ResourceBackgroundQueue::initialiseAllResourceGroups"); |
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160 | } |
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161 | // queue a request |
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162 | Request req; |
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163 | req.type = RT_INITIALISE_ALL_GROUPS; |
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164 | req.listener = listener; |
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165 | return addRequest(req); |
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166 | #else |
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167 | // synchronous |
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168 | ResourceGroupManager::getSingleton().initialiseAllResourceGroups(); |
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169 | return 0; |
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170 | #endif |
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171 | } |
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172 | //------------------------------------------------------------------------ |
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173 | BackgroundProcessTicket ResourceBackgroundQueue::loadResourceGroup( |
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174 | const String& name, ResourceBackgroundQueue::Listener* listener) |
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175 | { |
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176 | #if OGRE_THREAD_SUPPORT |
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177 | if (!mThread && mStartThread) |
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178 | { |
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179 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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180 | "Thread not initialised", |
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181 | "ResourceBackgroundQueue::loadResourceGroup"); |
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182 | } |
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183 | // queue a request |
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184 | Request req; |
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185 | req.type = RT_LOAD_GROUP; |
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186 | req.groupName = name; |
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187 | req.listener = listener; |
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188 | return addRequest(req); |
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189 | #else |
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190 | // synchronous |
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191 | ResourceGroupManager::getSingleton().loadResourceGroup(name); |
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192 | return 0; |
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193 | #endif |
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194 | } |
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195 | //------------------------------------------------------------------------ |
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196 | BackgroundProcessTicket ResourceBackgroundQueue::load( |
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197 | const String& resType, const String& name, |
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198 | const String& group, bool isManual, |
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199 | ManualResourceLoader* loader, |
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200 | const NameValuePairList* loadParams, |
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201 | ResourceBackgroundQueue::Listener* listener) |
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202 | { |
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203 | #if OGRE_THREAD_SUPPORT |
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204 | if (!mThread && mStartThread) |
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205 | { |
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206 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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207 | "Thread not initialised", |
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208 | "ResourceBackgroundQueue::load"); |
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209 | } |
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210 | // queue a request |
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211 | Request req; |
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212 | req.type = RT_LOAD_RESOURCE; |
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213 | req.resourceType = resType; |
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214 | req.resourceName = name; |
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215 | req.groupName = group; |
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216 | req.isManual = isManual; |
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217 | req.loader = loader; |
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218 | req.loadParams = loadParams; |
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219 | req.listener = listener; |
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220 | return addRequest(req); |
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221 | #else |
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222 | // synchronous |
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223 | ResourceManager* rm = |
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224 | ResourceGroupManager::getSingleton()._getResourceManager(resType); |
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225 | rm->load(name, group, isManual, loader, loadParams); |
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226 | return 0; |
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227 | #endif |
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228 | } |
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229 | //--------------------------------------------------------------------- |
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230 | BackgroundProcessTicket ResourceBackgroundQueue::unload( |
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231 | const String& resType, const String& name, Listener* listener) |
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232 | { |
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233 | #if OGRE_THREAD_SUPPORT |
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234 | if (!mThread && mStartThread) |
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235 | { |
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236 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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237 | "Thread not initialised", |
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238 | "ResourceBackgroundQueue::unload"); |
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239 | } |
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240 | // queue a request |
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241 | Request req; |
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242 | req.type = RT_UNLOAD_RESOURCE; |
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243 | req.resourceType = resType; |
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244 | req.resourceName = name; |
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245 | req.listener = listener; |
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246 | return addRequest(req); |
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247 | #else |
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248 | // synchronous |
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249 | ResourceManager* rm = |
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250 | ResourceGroupManager::getSingleton()._getResourceManager(resType); |
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251 | rm->unload(name); |
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252 | return 0; |
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253 | #endif |
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254 | |
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255 | } |
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256 | //--------------------------------------------------------------------- |
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257 | BackgroundProcessTicket ResourceBackgroundQueue::unload( |
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258 | const String& resType, ResourceHandle handle, Listener* listener) |
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259 | { |
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260 | #if OGRE_THREAD_SUPPORT |
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261 | if (!mThread && mStartThread) |
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262 | { |
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263 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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264 | "Thread not initialised", |
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265 | "ResourceBackgroundQueue::unload"); |
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266 | } |
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267 | // queue a request |
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268 | Request req; |
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269 | req.type = RT_UNLOAD_RESOURCE; |
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270 | req.resourceType = resType; |
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271 | req.resourceHandle = handle; |
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272 | req.listener = listener; |
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273 | return addRequest(req); |
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274 | #else |
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275 | // synchronous |
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276 | ResourceManager* rm = |
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277 | ResourceGroupManager::getSingleton()._getResourceManager(resType); |
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278 | rm->unload(handle); |
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279 | return 0; |
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280 | #endif |
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281 | |
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282 | } |
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283 | //--------------------------------------------------------------------- |
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284 | BackgroundProcessTicket ResourceBackgroundQueue::unloadResourceGroup( |
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285 | const String& name, Listener* listener) |
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286 | { |
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287 | #if OGRE_THREAD_SUPPORT |
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288 | if (!mThread && mStartThread) |
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289 | { |
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290 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR, |
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291 | "Thread not initialised", |
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292 | "ResourceBackgroundQueue::unloadResourceGroup"); |
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293 | } |
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294 | // queue a request |
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295 | Request req; |
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296 | req.type = RT_UNLOAD_GROUP; |
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297 | req.groupName = name; |
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298 | req.listener = listener; |
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299 | return addRequest(req); |
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300 | #else |
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301 | // synchronous |
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302 | ResourceGroupManager::getSingleton().unloadResourceGroup(name); |
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303 | return 0; |
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304 | #endif |
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305 | |
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306 | } |
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307 | //------------------------------------------------------------------------ |
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308 | bool ResourceBackgroundQueue::isProcessComplete( |
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309 | BackgroundProcessTicket ticket) |
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310 | { |
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311 | // Lock |
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312 | OGRE_LOCK_AUTO_MUTEX |
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313 | |
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314 | return mRequestTicketMap.find(ticket) == mRequestTicketMap.end(); |
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315 | } |
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316 | //------------------------------------------------------------------------ |
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317 | #if OGRE_THREAD_SUPPORT |
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318 | BackgroundProcessTicket ResourceBackgroundQueue::addRequest(Request& req) |
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319 | { |
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320 | // Lock |
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321 | OGRE_LOCK_AUTO_MUTEX |
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322 | |
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323 | req.ticketID = ++mNextTicketID; |
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324 | mRequestQueue.push_back(req); |
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325 | Request* requestInList = &(mRequestQueue.back()); |
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326 | mRequestTicketMap[req.ticketID] = requestInList; |
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327 | |
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328 | // Notify to wake up loading thread |
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329 | OGRE_THREAD_NOTIFY_ONE(mCondition) |
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330 | |
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331 | return req.ticketID; |
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332 | } |
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333 | //------------------------------------------------------------------------ |
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334 | void ResourceBackgroundQueue::threadFunc(void) |
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335 | { |
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336 | // Background thread implementation |
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337 | // Static (since no params allowed), so get instance |
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338 | ResourceBackgroundQueue& queueInstance = |
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339 | ResourceBackgroundQueue::getSingleton(); |
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340 | |
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341 | LogManager::getSingleton().logMessage("ResourceBackgroundQueue - thread starting."); |
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342 | |
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343 | // Initialise the thread |
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344 | queueInstance._initThread(); |
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345 | |
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346 | // Spin forever until we're told to shut down |
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347 | while (!queueInstance.mShuttingDown) |
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348 | { |
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349 | // Our thread will just wait when there is nothing on the queue |
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350 | // _doNextQueuedBackgroundProcess won't do this since the thread |
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351 | // may be shared |
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352 | |
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353 | // Manual scope block just to define scope of lock |
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354 | { |
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355 | // Lock; note that 'mCondition.wait()' will free the lock |
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356 | boost::recursive_mutex::scoped_lock queueLock( |
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357 | queueInstance.OGRE_AUTO_MUTEX_NAME); |
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358 | if (queueInstance.mRequestQueue.empty()) |
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359 | { |
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360 | // frees lock and suspends the thread |
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361 | queueInstance.mCondition.wait(queueLock); |
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362 | } |
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363 | // When we get back here, it's because we've been notified |
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364 | // and thus the thread as been woken up. Lock has also been |
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365 | // re-acquired. |
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366 | } // release lock so queueing can be done while we process one request |
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367 | |
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368 | queueInstance._doNextQueuedBackgroundProcess(); |
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369 | |
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370 | |
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371 | } |
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372 | |
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373 | LogManager::getSingleton().logMessage("ResourceBackgroundQueue - thread stopped."); |
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374 | |
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375 | |
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376 | |
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377 | } |
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378 | #endif |
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379 | //----------------------------------------------------------------------- |
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380 | void ResourceBackgroundQueue::_initThread() |
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381 | { |
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382 | // Register the calling thread with RenderSystem |
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383 | // Note how we assume only one thread is processing the queue |
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384 | Root::getSingleton().getRenderSystem()->registerThread(); |
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385 | { |
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386 | // notify waiting thread(s) |
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387 | OGRE_LOCK_MUTEX(initMutex) |
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388 | OGRE_THREAD_NOTIFY_ALL(initSync) |
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389 | } |
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390 | |
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391 | } |
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392 | //----------------------------------------------------------------------- |
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393 | bool ResourceBackgroundQueue::_doNextQueuedBackgroundProcess() |
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394 | { |
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395 | |
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396 | Request* req; |
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397 | // Manual scope block just to define scope of lock |
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398 | { |
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399 | OGRE_LOCK_AUTO_MUTEX |
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400 | // return false if nothing in the queue |
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401 | if (mRequestQueue.empty()) |
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402 | return false; |
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403 | |
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404 | // Process one request |
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405 | req = &(mRequestQueue.front()); |
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406 | } // release lock so queueing can be done while we process one request |
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407 | // use of std::list means that references guarateed to remain valid |
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408 | // we only allow one background thread |
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409 | |
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410 | ResourceManager* rm = 0; |
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411 | switch (req->type) |
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412 | { |
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413 | case RT_INITIALISE_GROUP: |
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414 | ResourceGroupManager::getSingleton().initialiseResourceGroup( |
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415 | req->groupName); |
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416 | break; |
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417 | case RT_INITIALISE_ALL_GROUPS: |
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418 | ResourceGroupManager::getSingleton().initialiseAllResourceGroups(); |
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419 | break; |
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420 | case RT_LOAD_GROUP: |
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421 | ResourceGroupManager::getSingleton().loadResourceGroup( |
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422 | req->groupName); |
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423 | break; |
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424 | case RT_UNLOAD_GROUP: |
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425 | ResourceGroupManager::getSingleton().unloadResourceGroup( |
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426 | req->groupName); |
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427 | break; |
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428 | case RT_LOAD_RESOURCE: |
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429 | rm = ResourceGroupManager::getSingleton()._getResourceManager( |
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430 | req->resourceType); |
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431 | rm->load(req->resourceName, req->groupName, req->isManual, |
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432 | req->loader, req->loadParams); |
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433 | break; |
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434 | case RT_UNLOAD_RESOURCE: |
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435 | rm = ResourceGroupManager::getSingleton()._getResourceManager( |
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436 | req->resourceType); |
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437 | if (req->resourceName.empty()) |
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438 | rm->unload(req->resourceHandle); |
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439 | else |
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440 | rm->unload(req->resourceName); |
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441 | break; |
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442 | case RT_SHUTDOWN: |
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443 | // That's all folks |
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444 | #if OGRE_THREAD_SUPPORT |
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445 | mShuttingDown = true; |
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446 | Root::getSingleton().getRenderSystem()->unregisterThread(); |
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447 | #endif |
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448 | break; |
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449 | }; |
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450 | |
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451 | // Queue notification (don't do shutdown since not needed & listeners |
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452 | // might be being destroyed too |
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453 | if (req->listener && req->type != RT_SHUTDOWN) |
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454 | { |
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455 | // Fire in-thread notification first |
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456 | req->listener->operationCompletedInThread(req->ticketID); |
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457 | // Then queue main thread notification |
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458 | queueFireBackgroundOperationComplete(req->listener, req->ticketID); |
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459 | } |
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460 | |
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461 | |
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462 | { |
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463 | // re-lock to consume completed request |
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464 | OGRE_LOCK_AUTO_MUTEX |
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465 | |
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466 | // Consume the ticket |
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467 | mRequestTicketMap.erase(req->ticketID); |
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468 | mRequestQueue.pop_front(); |
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469 | } |
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470 | |
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471 | return true; |
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472 | |
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473 | } |
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474 | //----------------------------------------------------------------------- |
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475 | void ResourceBackgroundQueue::_queueFireBackgroundLoadingComplete( |
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476 | Resource::Listener* listener, Resource* res) |
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477 | { |
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478 | OGRE_LOCK_MUTEX(mNotificationQueueMutex); |
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479 | mNotificationQueue.push_back(QueuedNotification(listener, res)); |
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480 | |
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481 | } |
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482 | //----------------------------------------------------------------------- |
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483 | void ResourceBackgroundQueue::queueFireBackgroundOperationComplete( |
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484 | ResourceBackgroundQueue::Listener* listener, BackgroundProcessTicket ticket) |
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485 | { |
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486 | OGRE_LOCK_MUTEX(mNotificationQueueMutex); |
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487 | mNotificationQueue.push_back(QueuedNotification(listener, ticket)); |
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488 | } |
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489 | //----------------------------------------------------------------------- |
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490 | void ResourceBackgroundQueue::_fireBackgroundLoadingComplete() |
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491 | { |
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492 | OGRE_LOCK_MUTEX(mNotificationQueueMutex); |
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493 | for (NotificationQueue::iterator i = mNotificationQueue.begin(); |
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494 | i != mNotificationQueue.end(); ++i) |
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495 | { |
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496 | if (i->resource) |
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497 | i->resourceListener->backgroundLoadingComplete(i->resource); |
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498 | else |
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499 | i->opListener->operationCompleted(i->ticket); |
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500 | } |
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501 | mNotificationQueue.clear(); |
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502 | |
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503 | } |
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504 | //------------------------------------------------------------------------ |
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505 | |
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506 | } |
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507 | |
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508 | |
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509 | |
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