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comparison Core/SharedLibrary.cpp @ 2463:be5c0f4155f6

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move SharedLibrary into OrthancFramework
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 05 Jan 2018 10:10:07 +0100
parents Plugins/Engine/SharedLibrary.cpp@878b59270859
children d924f9bb61cc
comparison
equal deleted inserted replaced
2462:d61e73357674 2463:be5c0f4155f6
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2018 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
11 *
12 * In addition, as a special exception, the copyright holders of this
13 * program give permission to link the code of its release with the
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
15 * that use the same license as the "OpenSSL" library), and distribute
16 * the linked executables. You must obey the GNU General Public License
17 * in all respects for all of the code used other than "OpenSSL". If you
18 * modify file(s) with this exception, you may extend this exception to
19 * your version of the file(s), but you are not obligated to do so. If
20 * you do not wish to do so, delete this exception statement from your
21 * version. If you delete this exception statement from all source files
22 * in the program, then also delete it here.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 **/
32
33
34 #include "PrecompiledHeaders.h"
35 #include "SharedLibrary.h"
36
37 #include "Logging.h"
38 #include "OrthancException.h"
39
40 #include <boost/filesystem.hpp>
41
42 #if defined(_WIN32)
43 #include <windows.h>
44 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
45 #include <dlfcn.h>
46 #else
47 #error Support your platform here
48 #endif
49
50 namespace Orthanc
51 {
52 SharedLibrary::SharedLibrary(const std::string& path) :
53 path_(path),
54 handle_(NULL)
55 {
56 #if defined(_WIN32)
57 handle_ = ::LoadLibraryA(path_.c_str());
58 if (handle_ == NULL)
59 {
60 LOG(ERROR) << "LoadLibrary(" << path_ << ") failed: Error " << ::GetLastError();
61 throw OrthancException(ErrorCode_SharedLibrary);
62 }
63
64 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
65 handle_ = ::dlopen(path_.c_str(), RTLD_NOW);
66 if (handle_ == NULL)
67 {
68 std::string explanation;
69 const char *tmp = ::dlerror();
70 if (tmp)
71 {
72 explanation = ": Error " + std::string(tmp);
73 }
74
75 LOG(ERROR) << "dlopen(" << path_ << ") failed" << explanation;
76 throw OrthancException(ErrorCode_SharedLibrary);
77 }
78
79 #else
80 #error Support your platform here
81 #endif
82 }
83
84 SharedLibrary::~SharedLibrary()
85 {
86 if (handle_)
87 {
88 #if defined(_WIN32)
89 ::FreeLibrary((HMODULE)handle_);
90 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
91 ::dlclose(handle_);
92 #else
93 #error Support your platform here
94 #endif
95 }
96 }
97
98
99 SharedLibrary::FunctionPointer SharedLibrary::GetFunctionInternal(const std::string& name)
100 {
101 if (!handle_)
102 {
103 throw OrthancException(ErrorCode_InternalError);
104 }
105
106 #if defined(_WIN32)
107 return ::GetProcAddress((HMODULE)handle_, name.c_str());
108 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
109 return ::dlsym(handle_, name.c_str());
110 #else
111 #error Support your platform here
112 #endif
113 }
114
115
116 SharedLibrary::FunctionPointer SharedLibrary::GetFunction(const std::string& name)
117 {
118 SharedLibrary::FunctionPointer result = GetFunctionInternal(name);
119
120 if (result == NULL)
121 {
122 LOG(ERROR) << "Shared library does not expose function \"" << name << "\"";
123 throw OrthancException(ErrorCode_SharedLibrary);
124 }
125 else
126 {
127 return result;
128 }
129 }
130
131
132 bool SharedLibrary::HasFunction(const std::string& name)
133 {
134 return GetFunctionInternal(name) != NULL;
135 }
136 }