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)
41typedef struct _GModule GModule;
42#endif
43
44namespace WebKit {
45
46class Module {
47    WTF_MAKE_NONCOPYABLE(Module);
48public:
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
63private:
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
81template<typename FunctionType> FunctionType Module::functionPointer(const char* functionName) const
82{
83    return reinterpret_cast<FunctionType>(platformFunctionPointer(functionName));
84}
85
86}
87
88#endif
89