Mercurial > hg > orthanc-stone
annotate Resources/Orthanc/Core/SharedLibrary.cpp @ 208:db70f6c5fa4f
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 11 Apr 2018 16:27:09 +0200 |
parents | 03afbee0cc7b |
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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) 2017-2018 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 General Public License as |
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9 * published by the Free Software Foundation, either version 3 of the |
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10 * License, or (at your option) any later version. |
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11 * |
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12 * In addition, as a special exception, the copyright holders of this |
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13 * program give permission to link the code of its release with the |
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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15 * that use the same license as the "OpenSSL" library), and distribute |
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16 * the linked executables. You must obey the GNU General Public License |
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17 * in all respects for all of the code used other than "OpenSSL". If you |
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18 * modify file(s) with this exception, you may extend this exception to |
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19 * your version of the file(s), but you are not obligated to do so. If |
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20 * you do not wish to do so, delete this exception statement from your |
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21 * version. If you delete this exception statement from all source files |
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22 * in the program, then also delete it here. |
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23 * |
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24 * This program is distributed in the hope that it will be useful, but |
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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27 * General Public License for more details. |
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28 * |
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29 * You should have received a copy of the GNU General Public License |
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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31 **/ |
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32 |
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33 |
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34 #include "PrecompiledHeaders.h" |
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35 #include "SharedLibrary.h" |
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36 |
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37 #include "Logging.h" |
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38 #include "OrthancException.h" |
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39 |
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40 #include <boost/filesystem.hpp> |
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41 |
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42 #if defined(_WIN32) |
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43 #include <windows.h> |
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44 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
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45 #include <dlfcn.h> |
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46 #else |
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47 #error Support your platform here |
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48 #endif |
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49 |
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50 namespace Orthanc |
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51 { |
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52 SharedLibrary::SharedLibrary(const std::string& path) : |
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53 path_(path), |
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54 handle_(NULL) |
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55 { |
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56 #if defined(_WIN32) |
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57 handle_ = ::LoadLibraryA(path_.c_str()); |
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58 if (handle_ == NULL) |
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59 { |
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60 LOG(ERROR) << "LoadLibrary(" << path_ << ") failed: Error " << ::GetLastError(); |
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61 throw OrthancException(ErrorCode_SharedLibrary); |
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62 } |
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63 |
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64 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
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65 handle_ = ::dlopen(path_.c_str(), RTLD_NOW); |
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66 if (handle_ == NULL) |
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67 { |
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68 std::string explanation; |
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69 const char *tmp = ::dlerror(); |
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70 if (tmp) |
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71 { |
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72 explanation = ": Error " + std::string(tmp); |
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73 } |
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74 |
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75 LOG(ERROR) << "dlopen(" << path_ << ") failed" << explanation; |
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76 throw OrthancException(ErrorCode_SharedLibrary); |
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77 } |
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78 |
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79 #else |
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80 #error Support your platform here |
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81 #endif |
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82 } |
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83 |
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84 SharedLibrary::~SharedLibrary() |
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85 { |
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86 if (handle_) |
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87 { |
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88 #if defined(_WIN32) |
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89 ::FreeLibrary((HMODULE)handle_); |
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90 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
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91 ::dlclose(handle_); |
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92 #else |
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93 #error Support your platform here |
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94 #endif |
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95 } |
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96 } |
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97 |
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98 |
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99 SharedLibrary::FunctionPointer SharedLibrary::GetFunctionInternal(const std::string& name) |
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100 { |
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101 if (!handle_) |
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102 { |
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103 throw OrthancException(ErrorCode_InternalError); |
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104 } |
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105 |
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106 #if defined(_WIN32) |
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107 return ::GetProcAddress((HMODULE)handle_, name.c_str()); |
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108 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) |
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109 return ::dlsym(handle_, name.c_str()); |
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110 #else |
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111 #error Support your platform here |
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112 #endif |
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113 } |
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114 |
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115 |
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116 SharedLibrary::FunctionPointer SharedLibrary::GetFunction(const std::string& name) |
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117 { |
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118 SharedLibrary::FunctionPointer result = GetFunctionInternal(name); |
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119 |
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120 if (result == NULL) |
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121 { |
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122 LOG(ERROR) << "Shared library does not expose function \"" << name << "\""; |
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123 throw OrthancException(ErrorCode_SharedLibrary); |
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124 } |
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125 else |
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126 { |
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127 return result; |
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128 } |
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129 } |
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130 |
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131 |
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132 bool SharedLibrary::HasFunction(const std::string& name) |
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133 { |
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134 return GetFunctionInternal(name) != NULL; |
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135 } |
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136 } |