MyGUI_DynLib.cpp

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/*
 * This source file is part of MyGUI. For the latest info, see http://mygui.info/
 * Distributed under the MIT License
 * (See accompanying file COPYING.MIT or copy at http://opensource.org/licenses/MIT)
 */

#include "MyGUI_Precompiled.h"
#include "MyGUI_DynLib.h"

#if MYGUI_PLATFORM == MYGUI_PLATFORM_WIN32
#   include <windows.h>
#elif MYGUI_PLATFORM == MYGUI_PLATFORM_LINUX
#   include <dlfcn.h>
#endif

namespace MyGUI
{
    DynLib::DynLib(const std::string& name) :
        mName(name),
        mInstance(nullptr)
    {
    }

    DynLib::~DynLib()
    {
    }

    bool DynLib::load()
    {
        // Log library load
        MYGUI_LOG(Info, "Loading library " << mName);

#if MYGUI_PLATFORM == MYGUI_PLATFORM_APPLE
        //APPLE SPECIFIC CODE HERE
#else
        mInstance = (MYGUI_DYNLIB_HANDLE)MYGUI_DYNLIB_LOAD( mName.c_str() );
#endif

        return mInstance != 0;
    }


    void DynLib::unload()
    {
        // Log library unload
        MYGUI_LOG(Info, "Unloading library " << mName);
#if MYGUI_PLATFORM == MYGUI_PLATFORM_APPLE
        //APPLE SPECIFIC CODE HERE
#else
        if (MYGUI_DYNLIB_UNLOAD(mInstance))
        {
            MYGUI_EXCEPT("Could not unload dynamic library '" << mName << "'. System Error: " << dynlibError());
        }
#endif
    }

    void* DynLib::getSymbol( const std::string& strName ) const throw()
    {
#if MYGUI_PLATFORM == MYGUI_PLATFORM_APPLE
        //APPLE SPECIFIC CODE HERE
        return nullptr;
#else
        return (void*)MYGUI_DYNLIB_GETSYM(mInstance, strName.c_str());
#endif
    }

    std::string DynLib::dynlibError() const
    {
#if MYGUI_PLATFORM == MYGUI_PLATFORM_WIN32
        LPVOID lpMsgBuf;
        FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_IGNORE_INSERTS,
            NULL,
            GetLastError(),
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
            (LPTSTR) &lpMsgBuf,
            0,
            NULL);
        std::string ret = (char*)lpMsgBuf;
        // Free the buffer.
        LocalFree( lpMsgBuf );
        return ret;
#else
        return "no unix error function defined yet";
#endif
    }

    std::string DynLib::getName(void) const
    {
        return mName;
    }

} // namespace MyGUI