1 /**************************************************************************
2  *
3  * Copyright 2012 Jose Fonseca
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  *
24  **************************************************************************/
25 
26 /*
27  * Dynamic library linking abstraction.
28  */
29 
30 #pragma once
31 
32 
33 #if defined(_WIN32)
34 #include <windows.h>
35 #else
36 #include <dlfcn.h>
37 #endif
38 
39 
40 #if defined(_WIN32)
41 #define OS_LIBRARY_EXTENSION ".dll"
42 #elif defined(__APPLE__)
43 #define OS_LIBRARY_EXTENSION ".dylib"
44 #else
45 #define OS_LIBRARY_EXTENSION ".so"
46 #endif
47 
48 
49 namespace os {
50 
51     // TODO: Wrap in a class
52 #if defined(_WIN32)
53     typedef HMODULE Library;
54 #else
55     typedef void * Library;
56 #endif
57 
58     inline Library
openLibrary(const char * filename)59     openLibrary(const char *filename) {
60 #if defined(_WIN32)
61         return LoadLibraryA(filename);
62 #else
63         return dlopen(filename, RTLD_LOCAL | RTLD_LAZY);
64 #endif
65     }
66 
67     inline void *
getLibrarySymbol(Library library,const char * symbol)68     getLibrarySymbol(Library library, const char *symbol) {
69 #if defined(_WIN32)
70         return (void *)GetProcAddress(library, symbol);
71 #else
72         return dlsym(library, symbol);
73 #endif
74     }
75 
76     inline void
closeLibrary(Library library)77     closeLibrary(Library library) {
78 #if defined(_WIN32)
79         FreeLibrary(library);
80 #else
81         dlclose(library);
82 #endif
83     }
84 
85 
86 } /* namespace os */
87 
88