Mercurial > hg > orthanc
annotate Core/MultiThreading/BagOfTasksProcessor.cpp @ 2322:dc7c8eebcc80
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 14 Jul 2017 10:37:50 +0200 |
| parents | a3a65de1840f |
| children | 878b59270859 |
| rev | line source |
|---|---|
| 1920 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017 Osimis, Belgium |
| 1920 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
| 34 #include "../PrecompiledHeaders.h" | |
| 35 #include "BagOfTasksProcessor.h" | |
| 36 | |
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37 #include "../Logging.h" |
| 1920 | 38 #include "../OrthancException.h" |
| 39 | |
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40 #include <stdio.h> |
| 1920 | 41 |
| 42 namespace Orthanc | |
| 43 { | |
| 44 class BagOfTasksProcessor::Task : public IDynamicObject | |
| 45 { | |
| 46 private: | |
| 47 uint64_t bag_; | |
| 48 std::auto_ptr<ICommand> command_; | |
| 49 | |
| 50 public: | |
| 51 Task(uint64_t bag, | |
| 52 ICommand* command) : | |
| 53 bag_(bag), | |
| 54 command_(command) | |
| 55 { | |
| 56 } | |
| 57 | |
| 58 bool Execute() | |
| 59 { | |
| 60 try | |
| 61 { | |
| 62 return command_->Execute(); | |
| 63 } | |
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64 catch (OrthancException& e) |
| 1920 | 65 { |
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66 LOG(ERROR) << "Exception while processing a bag of tasks: " << e.What(); |
| 1920 | 67 return false; |
| 68 } | |
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69 catch (std::runtime_error& e) |
| 1920 | 70 { |
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71 LOG(ERROR) << "Runtime exception while processing a bag of tasks: " << e.what(); |
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72 return false; |
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73 } |
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74 catch (...) |
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75 { |
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76 LOG(ERROR) << "Native exception while processing a bag of tasks"; |
| 1920 | 77 return false; |
| 78 } | |
| 79 } | |
| 80 | |
| 81 uint64_t GetBag() | |
| 82 { | |
| 83 return bag_; | |
| 84 } | |
| 85 }; | |
| 86 | |
| 87 | |
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88 void BagOfTasksProcessor::SignalProgress(Task& task, |
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89 Bag& bag) |
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90 { |
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91 assert(bag.done_ < bag.size_); |
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92 |
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93 bag.done_ += 1; |
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94 |
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95 if (bag.done_ == bag.size_) |
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96 { |
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97 exitStatus_[task.GetBag()] = (bag.status_ == BagStatus_Running); |
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98 bagFinished_.notify_all(); |
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99 } |
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100 } |
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101 |
| 1920 | 102 void BagOfTasksProcessor::Worker(BagOfTasksProcessor* that) |
| 103 { | |
| 104 while (that->continue_) | |
| 105 { | |
| 106 std::auto_ptr<IDynamicObject> obj(that->queue_.Dequeue(100)); | |
| 107 if (obj.get() != NULL) | |
| 108 { | |
| 109 Task& task = *dynamic_cast<Task*>(obj.get()); | |
| 110 | |
| 111 { | |
| 112 boost::mutex::scoped_lock lock(that->mutex_); | |
| 113 | |
| 114 Bags::iterator bag = that->bags_.find(task.GetBag()); | |
| 115 assert(bag != that->bags_.end()); | |
| 116 assert(bag->second.done_ < bag->second.size_); | |
| 117 | |
| 118 if (bag->second.status_ != BagStatus_Running) | |
| 119 { | |
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120 // Do not execute this task, as its parent bag of tasks |
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121 // has failed or is tagged as canceled |
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122 that->SignalProgress(task, bag->second); |
| 1920 | 123 continue; |
| 124 } | |
| 125 } | |
| 126 | |
| 127 bool success = task.Execute(); | |
| 128 | |
| 129 { | |
| 130 boost::mutex::scoped_lock lock(that->mutex_); | |
| 131 | |
| 132 Bags::iterator bag = that->bags_.find(task.GetBag()); | |
| 133 assert(bag != that->bags_.end()); | |
| 134 | |
| 135 if (!success) | |
| 136 { | |
| 137 bag->second.status_ = BagStatus_Failed; | |
| 138 } | |
| 139 | |
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140 that->SignalProgress(task, bag->second); |
| 1920 | 141 } |
| 142 } | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 | |
| 147 void BagOfTasksProcessor::Cancel(int64_t bag) | |
| 148 { | |
| 149 boost::mutex::scoped_lock lock(mutex_); | |
| 150 | |
| 151 Bags::iterator it = bags_.find(bag); | |
| 152 if (it != bags_.end()) | |
| 153 { | |
| 154 it->second.status_ = BagStatus_Canceled; | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 | |
| 159 bool BagOfTasksProcessor::Join(int64_t bag) | |
| 160 { | |
| 161 boost::mutex::scoped_lock lock(mutex_); | |
| 162 | |
| 163 while (continue_) | |
| 164 { | |
| 165 ExitStatus::iterator it = exitStatus_.find(bag); | |
| 166 if (it == exitStatus_.end()) // The bag is still running | |
| 167 { | |
| 168 bagFinished_.wait(lock); | |
| 169 } | |
| 170 else | |
| 171 { | |
| 172 bool status = it->second; | |
| 173 exitStatus_.erase(it); | |
| 174 return status; | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 return false; // The processor is stopping | |
| 179 } | |
| 180 | |
| 181 | |
| 182 float BagOfTasksProcessor::GetProgress(int64_t bag) | |
| 183 { | |
| 184 boost::mutex::scoped_lock lock(mutex_); | |
| 185 | |
| 186 Bags::const_iterator it = bags_.find(bag); | |
| 187 if (it == bags_.end()) | |
| 188 { | |
| 189 // The bag of tasks has finished | |
| 190 return 1.0f; | |
| 191 } | |
| 192 else | |
| 193 { | |
| 194 return (static_cast<float>(it->second.done_) / | |
| 195 static_cast<float>(it->second.size_)); | |
| 196 } | |
| 197 } | |
| 198 | |
| 199 | |
| 200 bool BagOfTasksProcessor::Handle::Join() | |
| 201 { | |
| 202 if (hasJoined_) | |
| 203 { | |
| 204 return status_; | |
| 205 } | |
| 206 else | |
| 207 { | |
| 208 status_ = that_.Join(bag_); | |
| 209 hasJoined_ = true; | |
| 210 return status_; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 | |
| 215 BagOfTasksProcessor::BagOfTasksProcessor(size_t countThreads) : | |
| 216 countBags_(0), | |
| 217 continue_(true) | |
| 218 { | |
| 2016 | 219 if (countThreads == 0) |
| 1920 | 220 { |
| 221 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
| 222 } | |
| 223 | |
| 224 threads_.resize(countThreads); | |
| 225 | |
| 226 for (size_t i = 0; i < threads_.size(); i++) | |
| 227 { | |
| 228 threads_[i] = new boost::thread(Worker, this); | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 | |
| 233 BagOfTasksProcessor::~BagOfTasksProcessor() | |
| 234 { | |
| 235 continue_ = false; | |
| 236 | |
| 237 bagFinished_.notify_all(); // Wakes up all the pending "Join()" | |
| 238 | |
| 239 for (size_t i = 0; i < threads_.size(); i++) | |
| 240 { | |
| 241 if (threads_[i]) | |
| 242 { | |
| 243 if (threads_[i]->joinable()) | |
| 244 { | |
| 245 threads_[i]->join(); | |
| 246 } | |
| 247 | |
| 248 delete threads_[i]; | |
| 249 threads_[i] = NULL; | |
| 250 } | |
| 251 } | |
| 252 } | |
| 253 | |
| 254 | |
| 255 BagOfTasksProcessor::Handle* BagOfTasksProcessor::Submit(BagOfTasks& tasks) | |
| 256 { | |
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257 if (tasks.GetSize() == 0) |
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258 { |
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259 return new Handle(*this, 0, true); |
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260 } |
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261 |
| 1920 | 262 boost::mutex::scoped_lock lock(mutex_); |
| 263 | |
| 264 uint64_t id = countBags_; | |
| 265 countBags_ += 1; | |
| 266 | |
| 267 Bag bag(tasks.GetSize()); | |
| 268 bags_[id] = bag; | |
| 269 | |
| 270 while (!tasks.IsEmpty()) | |
| 271 { | |
| 272 queue_.Enqueue(new Task(id, tasks.Pop())); | |
| 273 } | |
| 274 | |
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275 return new Handle(*this, id, false); |
| 1920 | 276 } |
| 277 } |