SharedLibrary.hpp revision a230805e1fb8d9da59c706ba13aed2a9f3410c1e 
1// SwiftShader Software Renderer
2//
3// Copyright(c) 2005-2012 TransGaming Inc.
4//
5// All rights reserved. No part of this software may be copied, distributed, transmitted,
6// transcribed, stored in a retrieval system, translated into any human or computer
7// language by any means, or disclosed to third parties without the explicit written
8// agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express
9// or implied, including but not limited to any patent rights, are granted to you.
10//
11
12#ifndef SharedLibrary_hpp
13#define SharedLibrary_hpp
14
15#if defined(_WIN32)
16	#include <Windows.h>
17#else
18	#include <dlfcn.h>
19#endif
20
21void *getLibraryHandle(const char *path);
22void *loadLibrary(const char *path);
23
24template<int n>
25void *loadLibrary(const char *(&names)[n])
26{
27	for(int i = 0; i < n; i++)
28	{
29		void *library = getLibraryHandle(names[i]);
30
31		if(library)
32		{
33			return library;
34		}
35	}
36
37	for(int i = 0; i < n; i++)
38	{
39		void *library = loadLibrary(names[i]);
40
41		if(library)
42		{
43			return library;
44		}
45	}
46
47	return 0;
48}
49
50#if defined(_WIN32)
51	inline void *loadLibrary(const char *path)
52	{
53		return (void*)LoadLibrary(path);
54	}
55
56	inline void *getLibraryHandle(const char *path)
57	{
58		HMODULE module = 0;
59		GetModuleHandleEx(0, path, &module);
60		return (void*)module;
61	}
62
63	inline void freeLibrary(void *library)
64	{
65		FreeLibrary((HMODULE)library);
66	}
67
68	inline void *getProcAddress(void *library, const char *name)
69	{
70		return (void*)GetProcAddress((HMODULE)library, name);
71	}
72#else
73	inline void *loadLibrary(const char *path)
74	{
75		return dlopen(path, RTLD_LAZY);
76	}
77
78	inline void *getLibraryHandle(const char *path)
79	{
80		#ifdef __ANDROID__
81			// bionic doesn't support RTLD_NOLOAD before L
82			return dlopen(path, RTLD_NOW);
83		#else
84			void *resident = dlopen(path, RTLD_LAZY | RTLD_NOLOAD);
85
86			if(resident)
87			{
88				return dlopen(path, RTLD_LAZY);   // Increment reference count
89			}
90
91			return 0;
92		#endif
93	}
94
95    inline void freeLibrary(void *library)
96    {
97        if(library)
98        {
99            dlclose(library);
100        }
101    }
102
103	inline void *getProcAddress(void *library, const char *name)
104	{
105		return library ? dlsym(library, name) : 0;
106	}
107#endif
108
109#endif   // SharedLibrary_hpp
110