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comparison OrthancFramework/Sources/SharedLibrary.cpp @ 4044:d25f4c0fa160 framework

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splitting code into OrthancFramework and OrthancServer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 10 Jun 2020 20:30:34 +0200
parents Core/SharedLibrary.cpp@626d5f4a5afb
children bf7b9edf6b81
comparison
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4043:6c6239aec462 4044:d25f4c0fa160
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) 2017-2020 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
66 /**
67 * "RTLD_LOCAL" is the default, and is only present to be
68 * explicit. "RTLD_DEEPBIND" was added in Orthanc 1.6.0, in order
69 * to avoid crashes while loading plugins from the LSB binaries of
70 * the Orthanc core.
71 *
72 * BUT this had no effect, and this results in a crash if loading
73 * the Python 2.7 plugin => We disabled it again in Orthanc 1.6.1.
74 **/
75
76 #if 0 // && defined(RTLD_DEEPBIND) // This is a GNU extension
77 // Disabled in Orthanc 1.6.1
78 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL | RTLD_DEEPBIND);
79 #else
80 handle_ = ::dlopen(path_.c_str(), RTLD_NOW | RTLD_LOCAL);
81 #endif
82
83 if (handle_ == NULL)
84 {
85 std::string explanation;
86 const char *tmp = ::dlerror();
87 if (tmp)
88 {
89 explanation = ": Error " + std::string(tmp);
90 }
91
92 LOG(ERROR) << "dlopen(" << path_ << ") failed" << explanation;
93 throw OrthancException(ErrorCode_SharedLibrary);
94 }
95
96 #else
97 #error Support your platform here
98 #endif
99 }
100
101 SharedLibrary::~SharedLibrary()
102 {
103 if (handle_)
104 {
105 #if defined(_WIN32)
106 ::FreeLibrary((HMODULE)handle_);
107 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
108 ::dlclose(handle_);
109 #else
110 #error Support your platform here
111 #endif
112 }
113 }
114
115
116 SharedLibrary::FunctionPointer SharedLibrary::GetFunctionInternal(const std::string& name)
117 {
118 if (!handle_)
119 {
120 throw OrthancException(ErrorCode_InternalError);
121 }
122
123 #if defined(_WIN32)
124 return ::GetProcAddress((HMODULE)handle_, name.c_str());
125 #elif defined(__linux__) || (defined(__APPLE__) && defined(__MACH__)) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__)
126 return ::dlsym(handle_, name.c_str());
127 #else
128 #error Support your platform here
129 #endif
130 }
131
132
133 SharedLibrary::FunctionPointer SharedLibrary::GetFunction(const std::string& name)
134 {
135 SharedLibrary::FunctionPointer result = GetFunctionInternal(name);
136
137 if (result == NULL)
138 {
139 throw OrthancException(
140 ErrorCode_SharedLibrary,
141 "Shared library does not expose function \"" + name + "\"");
142 }
143 else
144 {
145 return result;
146 }
147 }
148
149
150 bool SharedLibrary::HasFunction(const std::string& name)
151 {
152 return GetFunctionInternal(name) != NULL;
153 }
154 }