Mercurial > hg > orthanc
comparison Core/MultiThreading/RunnableWorkersPool.cpp @ 1679:15acdb19d520
RunnableWorkersPool
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 06 Oct 2015 13:31:40 +0200 |
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children | ee4367497d0d |
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1666:d7039be97eeb | 1679:15acdb19d520 |
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1 /** | |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
22 * | |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
33 #include "../PrecompiledHeaders.h" | |
34 #include "RunnableWorkersPool.h" | |
35 | |
36 #include "SharedMessageQueue.h" | |
37 #include "../OrthancException.h" | |
38 #include "../Logging.h" | |
39 | |
40 namespace Orthanc | |
41 { | |
42 struct RunnableWorkersPool::PImpl | |
43 { | |
44 class Worker | |
45 { | |
46 private: | |
47 const bool& continue_; | |
48 SharedMessageQueue& queue_; | |
49 boost::thread thread_; | |
50 | |
51 static void WorkerThread(Worker* that) | |
52 { | |
53 while (that->continue_) | |
54 { | |
55 std::auto_ptr<IDynamicObject> obj(that->queue_.Dequeue(100)); | |
56 if (obj.get() != NULL) | |
57 { | |
58 try | |
59 { | |
60 IRunnableBySteps& runnable = *dynamic_cast<IRunnableBySteps*>(obj.get()); | |
61 | |
62 bool wishToContinue = runnable.Step(); | |
63 | |
64 if (wishToContinue) | |
65 { | |
66 // The runnable wishes to continue, reinsert it at the beginning of the queue | |
67 that->queue_.Enqueue(obj.release()); | |
68 } | |
69 } | |
70 catch (OrthancException& e) | |
71 { | |
72 LOG(ERROR) << "Exception in a pool of working threads: " << e.What(); | |
73 } | |
74 } | |
75 } | |
76 } | |
77 | |
78 public: | |
79 Worker(const bool& globalContinue, | |
80 SharedMessageQueue& queue) : | |
81 continue_(globalContinue), | |
82 queue_(queue) | |
83 { | |
84 thread_ = boost::thread(WorkerThread, this); | |
85 } | |
86 | |
87 void Join() | |
88 { | |
89 if (thread_.joinable()) | |
90 { | |
91 thread_.join(); | |
92 } | |
93 } | |
94 }; | |
95 | |
96 | |
97 bool continue_; | |
98 std::vector<Worker*> workers_; | |
99 SharedMessageQueue queue_; | |
100 }; | |
101 | |
102 | |
103 | |
104 RunnableWorkersPool::RunnableWorkersPool(size_t countWorkers) : pimpl_(new PImpl) | |
105 { | |
106 pimpl_->continue_ = true; | |
107 | |
108 if (countWorkers <= 0) | |
109 { | |
110 throw OrthancException(ErrorCode_ParameterOutOfRange); | |
111 } | |
112 | |
113 pimpl_->workers_.resize(countWorkers); | |
114 | |
115 for (size_t i = 0; i < countWorkers; i++) | |
116 { | |
117 pimpl_->workers_[i] = new PImpl::Worker(pimpl_->continue_, pimpl_->queue_); | |
118 } | |
119 } | |
120 | |
121 | |
122 RunnableWorkersPool::~RunnableWorkersPool() | |
123 { | |
124 pimpl_->continue_ = false; | |
125 | |
126 for (size_t i = 0; i < pimpl_->workers_.size(); i++) | |
127 { | |
128 PImpl::Worker* worker = pimpl_->workers_[i]; | |
129 | |
130 if (worker != NULL) | |
131 { | |
132 worker->Join(); | |
133 delete worker; | |
134 } | |
135 } | |
136 } | |
137 | |
138 | |
139 void RunnableWorkersPool::Add(IRunnableBySteps* runnable) | |
140 { | |
141 pimpl_->queue_.Enqueue(runnable); | |
142 } | |
143 | |
144 | |
145 void RunnableWorkersPool::WaitDone() | |
146 { | |
147 pimpl_->queue_.WaitEmpty(0); | |
148 } | |
149 } |