Mercurial > hg > orthanc

comparison Plugins/Engine/SharedLibrary.cpp @ 885:0570a8c859cb plugins

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
SharedLibrary class
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 14 Jun 2014 16:53:28 +0200
parents Plugins/Engine/DynamicLibrary.cpp@cd8a69aa4093
children 4066e6f2d134
comparison
equal deleted inserted replaced
884:cd8a69aa4093 885:0570a8c859cb
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 }