Mercurial > hg > orthanc
annotate OrthancFramework/Sources/MultiThreading/Semaphore.h @ 4767:e1711b6e141f
Fix computation of the estimated time of arrival in jobs
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 18 Aug 2021 15:16:39 +0200 |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #pragma once |
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24 |
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25 #include "../OrthancFramework.h" |
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26 |
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27 #include <boost/noncopyable.hpp> |
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28 #include <boost/thread.hpp> |
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29 |
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30 namespace Orthanc |
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31 { |
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32 class ORTHANC_PUBLIC Semaphore : public boost::noncopyable |
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33 { |
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34 private: |
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35 unsigned int availableResources_; |
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36 boost::mutex mutex_; |
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37 boost::condition_variable condition_; |
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38 |
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39 void Release(unsigned int resourceCount = 1); |
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40 |
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41 void Acquire(unsigned int resourceCount = 1); |
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42 |
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43 bool TryAcquire(unsigned int resourceCount = 1); |
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44 public: |
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45 explicit Semaphore(unsigned int availableResources); |
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46 |
4300 | 47 unsigned int GetAvailableResourcesCount() const; |
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48 |
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49 |
2108 | 50 class Locker : public boost::noncopyable |
51 { | |
52 private: | |
53 Semaphore& that_; | |
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54 unsigned int resourceCount_; |
2108 | 55 |
56 public: | |
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57 explicit Locker(Semaphore& that, unsigned int resourceCount = 1) : |
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58 that_(that), |
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59 resourceCount_(resourceCount) |
2108 | 60 { |
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61 that_.Acquire(resourceCount_); |
2108 | 62 } |
63 | |
64 ~Locker() | |
65 { | |
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66 that_.Release(resourceCount_); |
2108 | 67 } |
68 }; | |
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69 |
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70 class TryLocker : public boost::noncopyable |
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71 { |
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72 private: |
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73 Semaphore& that_; |
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74 unsigned int resourceCount_; |
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75 bool isAcquired_; |
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76 |
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77 public: |
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78 explicit TryLocker(Semaphore& that, unsigned int resourceCount = 1) : |
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79 that_(that), |
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80 resourceCount_(resourceCount) |
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81 { |
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82 isAcquired_ = that_.TryAcquire(resourceCount_); |
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83 } |
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84 |
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85 ~TryLocker() |
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86 { |
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87 if (isAcquired_) |
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88 { |
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89 that_.Release(resourceCount_); |
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90 } |
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91 } |
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92 |
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93 bool IsAcquired() const |
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94 { |
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95 return isAcquired_; |
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96 } |
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97 }; |
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98 |
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99 }; |
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100 } |