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annotate Framework/Messages/ICallable.h @ 1274:ae157e5d8b62 bugs/2020-02-invisible-slice

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VC2008 fix
author Benjamin Golinvaux <bgo@osimis.io>
date Tue, 04 Feb 2020 12:29:30 +0100
parents 2d8ab34c8c91
children 6ab03e429f06
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1 /**
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2 * Stone of Orthanc
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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) 2017-2020 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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
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24 #include "IMessage.h"
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25
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26 #include <Core/Logging.h>
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27
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28 #include <boost/noncopyable.hpp>
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29
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30 #include <string>
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31 #include <stdint.h>
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32
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33 #include <stdint.h>
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34
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35 namespace OrthancStone {
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36
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37 class IObserver;
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38
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39 // This is referencing an object and member function that can be notified
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40 // by an IObservable. The object must derive from IO
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41 // The member functions must be of type "void Function(const IMessage& message)" or reference a derived class of IMessage
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42 class ICallable : public boost::noncopyable
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43 {
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44 public:
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45 virtual ~ICallable()
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46 {
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47 }
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48
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49 virtual void Apply(const IMessage& message) = 0;
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50
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51 virtual const MessageIdentifier& GetMessageIdentifier() = 0;
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52
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53 virtual IObserver* GetObserver() const = 0;
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54 };
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55
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56 template <typename TMessage>
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57 class MessageHandler: public ICallable
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58 {
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59 };
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60
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61
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62 template <typename TObserver,
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63 typename TMessage>
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64 class Callable : public MessageHandler<TMessage>
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65 {
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66 private:
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67 typedef void (TObserver::* MemberFunction) (const TMessage&);
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68
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69 TObserver& observer_;
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70 MemberFunction function_;
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71 int64_t observerFingerprint_;
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72
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73 public:
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74 Callable(TObserver& observer,
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75 MemberFunction function) :
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76 observer_(observer),
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77 function_(function),
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78 observerFingerprint_(observer.GetFingerprint())
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79 {
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80 }
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81
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82 void ApplyInternal(const TMessage& message)
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83 {
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84 int64_t currentFingerprint(observer_.GetFingerprint());
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85 if (observerFingerprint_ != currentFingerprint)
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86 {
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87 LOG(TRACE) << "The observer at address " <<
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88 std::hex << &observer_ << std::dec <<
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89 ") has a different fingerprint than the one recorded at callback " <<
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90 "registration time. This means that it is not the same object as " <<
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91 "the one recorded, even though their addresses are the same. " <<
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92 "Callback will NOT be sent!";
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93 LOG(TRACE) << " recorded fingerprint = " << observerFingerprint_ <<
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94 " current fingerprint = " << currentFingerprint;
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95 }
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96 else
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97 {
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98 LOG(TRACE) << "The recorded fingerprint is " << observerFingerprint_
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99 << " and the current fingerprint is " << currentFingerprint
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100 << " -- callable will be called.";
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101 (observer_.*function_) (message);
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102 }
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103 }
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104
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105 virtual void Apply(const IMessage& message)
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106 {
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107 ApplyInternal(dynamic_cast<const TMessage&>(message));
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108 }
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109
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110 virtual const MessageIdentifier& GetMessageIdentifier()
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111 {
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112 return TMessage::GetStaticIdentifier();
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113 }
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114
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115 virtual IObserver* GetObserver() const
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116 {
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117 return &observer_;
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118 }
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119 };
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120
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121 #if 0 /* __cplusplus >= 201103L*/
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122
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123 #include <functional>
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124
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125 template <typename TMessage>
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126 class LambdaCallable : public MessageHandler<TMessage>
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127 {
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128 private:
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129
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130 IObserver& observer_;
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131 std::function<void (const TMessage&)> lambda_;
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132
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133 public:
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134 LambdaCallable(IObserver& observer,
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135 std::function<void (const TMessage&)> lambdaFunction) :
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136 observer_(observer),
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137 lambda_(lambdaFunction)
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138 {
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139 }
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140
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141 virtual void Apply(const IMessage& message)
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142 {
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143 lambda_(dynamic_cast<const TMessage&>(message));
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144 }
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145
b70fcc134ba4 moved LambdaCallable (currently still disable because it does not work in WASM)
Alain Mazy <alain@mazy.be>
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146 virtual IObserver* GetObserver() const
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Alain Mazy <alain@mazy.be>
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147 {
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Alain Mazy <alain@mazy.be>
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148 return &observer_;
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149 }
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Alain Mazy <alain@mazy.be>
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150 };
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151 #endif //__cplusplus >= 201103L
299
3897f9f28cfa backup work in progress: updated messaging framework with ICallable
am@osimis.io
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152 }