1 /*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #ifndef Module_h
27 #define Module_h
28
29 #include <wtf/Noncopyable.h>
30 #include <wtf/text/WTFString.h>
31
32 #if PLATFORM(MAC)
33 #include <wtf/RetainPtr.h>
34 #endif
35
36 #if PLATFORM(QT)
37 #include <QLibrary>
38 #endif
39
40 #if PLATFORM(GTK)
41 typedef struct _GModule GModule;
42 #endif
43
44 namespace WebKit {
45
46 class Module {
47 WTF_MAKE_NONCOPYABLE(Module);
48 public:
49 Module(const String& path);
50 ~Module();
51
52 bool load();
53 // Note: On Mac this leaks the CFBundle to avoid crashes when a bundle is unloaded and there are
54 // live Objective-C objects whose methods come from that bundle.
55 void unload();
56
57 template<typename FunctionType> FunctionType functionPointer(const char* functionName) const;
58
59 #if PLATFORM(MAC) && !defined(__LP64__)
60 CFBundleRefNum bundleResourceMap();
61 #endif
62
63 private:
64 void* platformFunctionPointer(const char* functionName) const;
65
66 String m_path;
67 #if PLATFORM(MAC)
68 RetainPtr<CFBundleRef> m_bundle;
69 #if !defined(__LP64__)
70 CFBundleRefNum m_bundleResourceMap;
71 #endif
72 #elif PLATFORM(WIN)
73 HMODULE m_module;
74 #elif PLATFORM(QT)
75 QLibrary m_lib;
76 #elif PLATFORM(GTK)
77 GModule* m_handle;
78 #endif
79 };
80
functionPointer(const char * functionName)81 template<typename FunctionType> FunctionType Module::functionPointer(const char* functionName) const
82 {
83 return reinterpret_cast<FunctionType>(platformFunctionPointer(functionName));
84 }
85
86 }
87
88 #endif
89