1 | |
2 | // |
3 | // This source file is part of appleseed. |
4 | // Visit http://appleseedhq.net/ for additional information and resources. |
5 | // |
6 | // This software is released under the MIT license. |
7 | // |
8 | // Copyright (c) 2014-2017 Esteban Tovagliari, The appleseedhq Organization |
9 | // |
10 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
11 | // of this software and associated documentation files (the "Software"), to deal |
12 | // in the Software without restriction, including without limitation the rights |
13 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
14 | // copies of the Software, and to permit persons to whom the Software is |
15 | // furnished to do so, subject to the following conditions: |
16 | // |
17 | // The above copyright notice and this permission notice shall be included in |
18 | // all copies or substantial portions of the Software. |
19 | // |
20 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
21 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
22 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
23 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
24 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
25 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
26 | // THE SOFTWARE. |
27 | // |
28 | |
29 | // Interface header. |
30 | #include "sharedlibrary.h" |
31 | |
32 | // Standard headers. |
33 | #include <string> |
34 | |
35 | // Platform headers. |
36 | #ifndef _WIN32 |
37 | #include <dlfcn.h> |
38 | #endif |
39 | |
40 | using namespace std; |
41 | |
42 | namespace foundation |
43 | { |
44 | |
45 | // |
46 | // ExceptionCannotLoadSharedLib class implementation. |
47 | // |
48 | |
49 | ExceptionCannotLoadSharedLib::ExceptionCannotLoadSharedLib( |
50 | const char* path, |
51 | const char* error_msg) |
52 | { |
53 | string err("Cannot load shared library " ); |
54 | err += path; |
55 | err += ". Error = " ; |
56 | err += error_msg; |
57 | set_what(err.c_str()); |
58 | } |
59 | |
60 | |
61 | // |
62 | // ExceptionSharedLibCannotGetSymbol class implementation. |
63 | // |
64 | |
65 | ExceptionSharedLibCannotGetSymbol::ExceptionSharedLibCannotGetSymbol( |
66 | const char* symbol_name, |
67 | const char* error_msg) |
68 | { |
69 | string err("Cannot get symbol " ); |
70 | err += symbol_name; |
71 | err += ". Error = " ; |
72 | err += error_msg; |
73 | set_what(err.c_str()); |
74 | } |
75 | |
76 | |
77 | // |
78 | // SharedLibrary class implementation. |
79 | // |
80 | |
81 | namespace |
82 | { |
83 | |
84 | string get_last_error_message() |
85 | { |
86 | #ifdef _WIN32 |
87 | return get_windows_last_error_message(); |
88 | #else |
89 | return dlerror(); |
90 | #endif |
91 | } |
92 | |
93 | } |
94 | |
95 | SharedLibrary::SharedLibrary(const char* path) |
96 | { |
97 | #ifdef _WIN32 |
98 | m_handle = LoadLibraryA(path); |
99 | #else |
100 | m_handle = dlopen(path, RTLD_NOW | RTLD_GLOBAL); |
101 | #endif |
102 | |
103 | if (m_handle == 0) |
104 | { |
105 | throw ExceptionCannotLoadSharedLib( |
106 | path, |
107 | get_last_error_message().c_str()); |
108 | } |
109 | } |
110 | |
111 | SharedLibrary::~SharedLibrary() |
112 | { |
113 | #ifdef _WIN32 |
114 | FreeLibrary(m_handle); |
115 | #else |
116 | dlclose(m_handle); |
117 | #endif |
118 | } |
119 | |
120 | void* SharedLibrary::get_symbol(const char* name, const bool no_throw) const |
121 | { |
122 | #ifdef _WIN32 |
123 | void* symbol = GetProcAddress(m_handle, name); |
124 | #else |
125 | void* symbol = dlsym(m_handle, name); |
126 | #endif |
127 | |
128 | if (symbol == 0 && !no_throw) |
129 | { |
130 | throw ExceptionSharedLibCannotGetSymbol( |
131 | name, |
132 | get_last_error_message().c_str()); |
133 | } |
134 | |
135 | return symbol; |
136 | } |
137 | |
138 | } // namespace foundation |
139 | |