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      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 
     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