Mercurial > hg > orthanc
view Core/MultiThreading/ThreadedCommandProcessor.cpp @ 1365:38ce915cb455 query-retrieve
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 21 May 2015 17:03:15 +0200 |
parents | 7f0aa3c0f659 |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * In addition, as a special exception, the copyright holders of this * program give permission to link the code of its release with the * OpenSSL project's "OpenSSL" library (or with modified versions of it * that use the same license as the "OpenSSL" library), and distribute * the linked executables. You must obey the GNU General Public License * in all respects for all of the code used other than "OpenSSL". If you * modify file(s) with this exception, you may extend this exception to * your version of the file(s), but you are not obligated to do so. If * you do not wish to do so, delete this exception statement from your * version. If you delete this exception statement from all source files * in the program, then also delete it here. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "../PrecompiledHeaders.h" #include "ThreadedCommandProcessor.h" #include "../OrthancException.h" namespace Orthanc { static const int32_t TIMEOUT = 10; void ThreadedCommandProcessor::Processor(ThreadedCommandProcessor* that) { while (!that->done_) { std::auto_ptr<IDynamicObject> command(that->queue_.Dequeue(TIMEOUT)); if (command.get() != NULL) { bool success = false; try { if (that->success_) { // No command has failed so far if (that->cancel_) { // The commands have been canceled. Skip the execution // of this command, yet mark it as succeeded. success = true; } else { success = dynamic_cast<ICommand&>(*command).Execute(); } } else { // A command has already failed. Skip the execution of this command. } } catch (OrthancException) { } { boost::mutex::scoped_lock lock(that->mutex_); assert(that->remainingCommands_ > 0); that->remainingCommands_--; if (!success) { if (!that->cancel_ && that->listener_ && that->success_) { // This is the first command that fails that->listener_->SignalFailure(); } that->success_ = false; } else { if (!that->cancel_ && that->listener_) { if (that->remainingCommands_ == 0) { that->listener_->SignalSuccess(that->totalCommands_); } else { that->listener_->SignalProgress(that->totalCommands_ - that->remainingCommands_, that->totalCommands_); } } } that->processedCommand_.notify_all(); } } } } ThreadedCommandProcessor::ThreadedCommandProcessor(unsigned int numThreads) { if (numThreads < 1) { throw OrthancException(ErrorCode_ParameterOutOfRange); } listener_ = NULL; success_ = true; done_ = false; cancel_ = false; threads_.resize(numThreads); remainingCommands_ = 0; totalCommands_ = 0; for (unsigned int i = 0; i < numThreads; i++) { threads_[i] = new boost::thread(Processor, this); } } ThreadedCommandProcessor::~ThreadedCommandProcessor() { done_ = true; for (unsigned int i = 0; i < threads_.size(); i++) { boost::thread* t = threads_[i]; if (t != NULL) { if (t->joinable()) { t->join(); } delete t; } } } void ThreadedCommandProcessor::Post(ICommand* command) { if (command == NULL) { throw OrthancException(ErrorCode_ParameterOutOfRange); } boost::mutex::scoped_lock lock(mutex_); queue_.Enqueue(command); remainingCommands_++; totalCommands_++; } bool ThreadedCommandProcessor::Join() { boost::mutex::scoped_lock lock(mutex_); while (remainingCommands_ != 0) { processedCommand_.wait(lock); } if (cancel_ && listener_) { listener_->SignalCancel(); } // Reset the sequence counters for subsequent commands bool hasSucceeded = success_; success_ = true; totalCommands_ = 0; cancel_ = false; return hasSucceeded; } void ThreadedCommandProcessor::Cancel() { boost::mutex::scoped_lock lock(mutex_); cancel_ = true; } void ThreadedCommandProcessor::SetListener(IListener& listener) { boost::mutex::scoped_lock lock(mutex_); listener_ = &listener; } }