Mercurial > hg > orthanc

annotate OrthancFramework/Sources/SharedLibrary.cpp @ 4845:02d77189d8ba received-instance-callback

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added ReceivedInstanceCallback + sample C++ plugin
author Alain Mazy <am@osimis.io>
date Thu, 09 Dec 2021 17:22:40 +0100
parents 7053502fbf97
children 43e613a7756b
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rev   line source
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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) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "PrecompiledHeaders.h"
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25 #include "SharedLibrary.h"
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26
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27 #include "Logging.h"
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28 #include "OrthancException.h"
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29
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30 #include <boost/filesystem.hpp>
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31
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32 #if defined(_WIN32)
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33 #include <windows.h>
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34 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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35 #include <dlfcn.h>
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36 #else
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37 #error Support your platform here
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38 #endif
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39
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40 namespace Orthanc
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41 {
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42 SharedLibrary::SharedLibrary(const std::string& path) :
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43 path_(path),
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44 handle_(NULL)
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45 {
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46 #if defined(_WIN32)
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47 handle_ = ::LoadLibraryA(path_.c_str());
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48 if (handle_ == NULL)
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49 {
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50 LOG(ERROR) << "LoadLibrary(" << path_ << ") failed: Error " << ::GetLastError();
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51
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52 if (::GetLastError() == ERROR_BAD_EXE_FORMAT &&
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53 sizeof(void*) == 4)
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54 {
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55 throw OrthancException(ErrorCode_SharedLibrary,
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56 "You are most probably trying to load a 64bit plugin into a 32bit version of Orthanc");
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57 }
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58 else if (::GetLastError() == ERROR_BAD_EXE_FORMAT &&
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59 sizeof(void*) == 8)
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60 {
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61 throw OrthancException(ErrorCode_SharedLibrary,
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62 "You are most probably trying to load a 32bit plugin into a 64bit version of Orthanc");
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63 }
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64 else
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65 {
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66 throw OrthancException(ErrorCode_SharedLibrary);
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67 }
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68 }
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69
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70 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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71
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72 /**
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73 * "RTLD_LOCAL" is the default, and is only present to be
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74 * explicit. "RTLD_DEEPBIND" was added in Orthanc 1.6.0, in order
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75 * to avoid crashes while loading plugins from the LSB binaries of
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76 * the Orthanc core.
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77 *
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78 * BUT this had no effect, and this results in a crash if loading
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79 * the Python 2.7 plugin => We disabled it again in Orthanc 1.6.1.
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80 **/
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81
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82 #if 0 // && defined(RTLD_DEEPBIND) // This is a GNU extension
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83 // Disabled in Orthanc 1.6.1
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84 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL | RTLD_DEEPBIND);
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85 #else
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86 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL);
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87 #endif
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88
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89 if (handle_ == NULL)
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90 {
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91 std::string explanation;
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92 const char *tmp = ::dlerror();
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93 if (tmp)
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94 {
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95 explanation = ": Error " + std::string(tmp);
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96 }
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97
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98 LOG(ERROR) << "dlopen(" << path_ << ") failed" << explanation;
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99 throw OrthancException(ErrorCode_SharedLibrary);
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100 }
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101
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102 #else
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103 #error Support your platform here
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104 #endif
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105 }
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106
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107 SharedLibrary::~SharedLibrary()
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108 {
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109 if (handle_)
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110 {
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111 #if defined(_WIN32)
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112 ::FreeLibrary((HMODULE)handle_);
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113 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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114 ::dlclose(handle_);
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115 #else
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116 #error Support your platform here
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117 #endif
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118 }
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119 }
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120
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121
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122 const std::string &SharedLibrary::GetPath() const
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123 {
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124 return path_;
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125 }
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126
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127
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128 SharedLibrary::FunctionPointer SharedLibrary::GetFunctionInternal(const std::string& name)
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129 {
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130 if (!handle_)
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131 {
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132 throw OrthancException(ErrorCode_InternalError);
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133 }
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134
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135 #if defined(_WIN32)
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136 return ::GetProcAddress((HMODULE)handle_, name.c_str());
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137 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
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138 return ::dlsym(handle_, name.c_str());
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139 #else
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140 #error Support your platform here
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141 #endif
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142 }
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143
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144
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145 SharedLibrary::FunctionPointer SharedLibrary::GetFunction(const std::string& name)
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146 {
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147 SharedLibrary::FunctionPointer result = GetFunctionInternal(name);
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148
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149 if (result == NULL)
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150 {
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151 throw OrthancException(
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152 ErrorCode_SharedLibrary,
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153 "Shared library does not expose function \"" + name + "\"");
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154 }
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155 else
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156 {
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157 return result;
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158 }
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159 }
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160
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161
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162 bool SharedLibrary::HasFunction(const std::string& name)
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163 {
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164 return GetFunctionInternal(name) != NULL;
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165 }
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166 }