Mercurial > hg > orthanc
comparison Plugins/Engine/SharedLibrary.cpp @ 885:0570a8c859cb plugins
SharedLibrary class
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Sat, 14 Jun 2014 16:53:28 +0200 |
parents | Plugins/Engine/DynamicLibrary.cpp@cd8a69aa4093 |
children | 4066e6f2d134 |
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884:cd8a69aa4093 | 885:0570a8c859cb |
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1 /** | |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, | |
4 * Belgium | |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
10 * | |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
22 * | |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
33 #include "SharedLibrary.h" | |
34 | |
35 #include "../../Core/Toolbox.h" | |
36 | |
37 #if defined(_WIN32) | |
38 #include <windows.h> | |
39 #elif defined(__linux) | |
40 #include <dlfcn.h> | |
41 #else | |
42 #error Support your platform here | |
43 #endif | |
44 | |
45 #include <glog/logging.h> | |
46 | |
47 namespace Orthanc | |
48 { | |
49 SharedLibrary::SharedLibrary(const std::string& path) : handle_(NULL) | |
50 { | |
51 #if defined(_WIN32) | |
52 handle_ = ::LoadLibraryA(path.c_str()); | |
53 if (handle == NULL) | |
54 { | |
55 LOG(ERROR) << "LoadLibrary(" << path << ") failed: Error " << ::GetLastError(); | |
56 throw OrthancException(ErrorCode_SharedLibrary); | |
57 } | |
58 | |
59 #elif defined(__linux) | |
60 handle_ = ::dlopen(path.c_str(), RTLD_NOW); | |
61 if (handle_ == NULL) | |
62 { | |
63 std::string explanation; | |
64 const char *tmp = ::dlerror(); | |
65 if (tmp) | |
66 { | |
67 explanation = ": Error " + std::string(tmp); | |
68 } | |
69 | |
70 LOG(ERROR) << "dlopen(" << path << ") failed" << explanation; | |
71 throw OrthancException(ErrorCode_SharedLibrary); | |
72 } | |
73 | |
74 #else | |
75 #error Support your platform here | |
76 #endif | |
77 } | |
78 | |
79 SharedLibrary::~SharedLibrary() | |
80 { | |
81 if (handle_) | |
82 { | |
83 #if defined(_WIN32) | |
84 ::FreeLibrary((HMODULE)handle_); | |
85 #elif defined(__linux) | |
86 ::dlclose(handle_); | |
87 #else | |
88 #error Support your platform here | |
89 #endif | |
90 } | |
91 } | |
92 | |
93 | |
94 void* SharedLibrary::GetFunctionInternal(const std::string& name) | |
95 { | |
96 if (!handle_) | |
97 { | |
98 throw OrthancException(ErrorCode_InternalError); | |
99 } | |
100 | |
101 #if defined(_WIN32) | |
102 return ::GetProcAddress((HMODULE)handle_, name.c_str()); | |
103 #elif defined(__linux) | |
104 return ::dlsym(handle_, name.c_str()); | |
105 #else | |
106 #error Support your platform here | |
107 #endif | |
108 } | |
109 | |
110 | |
111 void* SharedLibrary::GetFunction(const std::string& name) | |
112 { | |
113 void* result = GetFunctionInternal(name); | |
114 | |
115 if (result == NULL) | |
116 { | |
117 LOG(ERROR) << "Shared library does not expose function \"" << name << "\""; | |
118 throw OrthancException(ErrorCode_SharedLibrary); | |
119 } | |
120 else | |
121 { | |
122 return result; | |
123 } | |
124 } | |
125 | |
126 | |
127 bool SharedLibrary::HasFunction(const std::string& name) | |
128 { | |
129 return GetFunctionInternal(name) != NULL; | |
130 } | |
131 } |