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annotate OrthancFramework/Sources/Compatibility.h @ 4298:db3932f9660d

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 05 Nov 2020 18:21:03 +0100
parents 2007ab69ac16
children ce9284aebd40
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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 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
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26 // Macro "ORTHANC_FORCE_INLINE" forces a function/method to be inlined
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27 #if defined(_MSC_VER)
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28 # define ORTHANC_FORCE_INLINE __forceinline
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29 #elif defined(__GNUC__) || defined(__clang__) || defined(__EMSCRIPTEN__)
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30 # define ORTHANC_FORCE_INLINE inline __attribute((always_inline))
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31 #else
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32 # error Please support your compiler here
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33 #endif
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34
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35
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36 // Macros "ORTHANC_OVERRIDE" and "ORTHANC_FINAL" wrap the "override"
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37 // and "final" keywords introduced in C++11, to do compile-time
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38 // checking of virtual methods
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39 // The __cplusplus macro is broken in Visual Studio up to 15.6 and, in
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40 // later versions, require the usage of the /Zc:__cplusplus flag
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41 // We thus use an alternate way of checking for 'override' support
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42 #ifdef ORTHANC_OVERRIDE_SUPPORTED
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43 # error ORTHANC_OVERRIDE_SUPPORTED cannot be defined at this point
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44 #endif
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45
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46 #if __cplusplus >= 201103L
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47 # define ORTHANC_OVERRIDE_SUPPORTED 1
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48 #else
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49 # ifdef _MSC_VER
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50 # if _MSC_VER >= 1600
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51 # define ORTHANC_OVERRIDE_SUPPORTED 1
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52 # endif
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53 # endif
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54 #endif
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55
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56
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57 #if ORTHANC_OVERRIDE_SUPPORTED
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58 // The override keyword (C++11) is enabled
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59 # define ORTHANC_OVERRIDE override
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60 # define ORTHANC_FINAL final
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61 #else
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62 // The override keyword (C++11) is not available
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63 # define ORTHANC_OVERRIDE
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64 # define ORTHANC_FINAL
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65 #endif
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68
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69 //#define Orthanc_Compatibility_h_STR2(x) #x
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70 //#define Orthanc_Compatibility_h_STR1(x) Orthanc_Compatibility_h_STR2(x)
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71
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72 //#pragma message("__cplusplus = " Orthanc_Compatibility_h_STR1(__cplusplus))
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73
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74 #if (defined _MSC_VER)
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75 //# pragma message("_MSC_VER = " Orthanc_Compatibility_h_STR1(_MSC_VER))
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76 //# pragma message("_MSVC_LANG = " Orthanc_Compatibility_h_STR1(_MSVC_LANG))
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77 // The __cplusplus macro cannot be used in Visual C++ < 1914 (VC++ 15.7)
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78 // However, even in recent versions, __cplusplus will only be correct (that is,
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79 // correctly defines the supported C++ version) if a special flag is passed to
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80 // the compiler ("/Zc:__cplusplus")
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81 // To make this header more robust, we use the _MSVC_LANG equivalent macro.
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82
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83 // please note that not all C++11 features are supported when _MSC_VER == 1600
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84 // (or higher). This header file can be made for fine-grained, if required,
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85 // based on specific _MSC_VER values
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86
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87 # if _MSC_VER >= 1600
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88 # define ORTHANC_Cxx03_DETECTED 0
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89 # else
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90 # define ORTHANC_Cxx03_DETECTED 1
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91 # endif
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92
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93 #else
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94 // of _MSC_VER is not defined, we assume __cplusplus is correctly defined
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95 // if __cplusplus is not defined (very old compilers??), then the following
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96 // test will compare 0 < 201103L and will be true --> safe.
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97 # if __cplusplus < 201103L
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98 # define ORTHANC_Cxx03_DETECTED 1
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99 # else
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100 # define ORTHANC_Cxx03_DETECTED 0
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101 # endif
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102 #endif
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103
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104 #if ORTHANC_Cxx03_DETECTED == 1
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105 //#pragma message("C++ 11 support is not present.")
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106
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107 /**
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108 * "std::unique_ptr" was introduced in C++11, and "std::auto_ptr" was
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109 * removed in C++17. We emulate "std::auto_ptr" using boost: "The
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110 * smart pointer unique_ptr [is] a drop-in replacement for
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111 * std::unique_ptr, usable also from C++03 compilers." This is only
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112 * available if Boost >= 1.57.0 (from November 2014).
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113 * https://www.boost.org/doc/libs/1_57_0/doc/html/move/reference.html#header.boost.move.unique_ptr_hpp
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114 **/
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115
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116 #include <boost/move/unique_ptr.hpp>
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117
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118 namespace std
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119 {
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120 template <typename T>
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121 class unique_ptr : public boost::movelib::unique_ptr<T>
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122 {
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123 public:
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124 explicit unique_ptr() :
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125 boost::movelib::unique_ptr<T>()
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126 {
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127 }
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128
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129 explicit unique_ptr(T* p) :
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130 boost::movelib::unique_ptr<T>(p)
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131 {
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132 }
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133 };
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134 }
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135 #else
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136 //# pragma message("C++ 11 support is present.")
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137 # include <memory>
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138 #endif