sharedlibrary.cpp

来自「rcssserver3d Robocup 3D比赛官方指定平台」· C++ 代码 · 共 137 行

/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*-

   this file is part of rcssserver3D
   Fri May 9 2003
   Copyright (C) 2002,2003 Koblenz University
   Copyright (C) 2003 RoboCup Soccer Server 3D Maintenance Group
   $Id: sharedlibrary.cpp,v 1.1 2007/06/20 01:00:47 fruit Exp $

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "sharedlibrary.h"
#include "fileclasses.h"
#include <iostream>

#ifdef WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif

using namespace salt;

#ifdef WIN32

bool SharedLibrary::Open(const std::string &libName)
{
        if (mLibHandle)
        {
                Close();
        }

#if INIT_DEBUG
    std::cerr << "(SharedLibrary) Opening " << libName + ".so\n";
#endif
        mLibHandle = ::LoadLibrary((libName + ".dll").c_str());

        return (mLibHandle!=NULL);
}

void* SharedLibrary::GetProcAddress(const std::string &procName)
{
        if (mLibHandle)
        {
                return ::GetProcAddress((HMODULE)mLibHandle, procName.c_str());
        }
        return NULL;
}

void SharedLibrary::Close()
{
        if (mLibHandle)
        {
                ::FreeLibrary((HMODULE)mLibHandle);
                mLibHandle = NULL;
        }
}

#else

bool
SharedLibrary::Open(const std::string &libName)
{
    if (mLibHandle)
    {
        Close();
    }
#if INIT_DEBUG
    std::cerr << "(SharedLibrary) Opening " << libName + ".so\n";
#endif
    mLibHandle = ::dlopen((libName + ".so").c_str(), RTLD_LAZY);

    if (mLibHandle == 0)
    {   // we didn't find the plugin, so we try again...
        /* mainly to work with MacOS bundles, so that plugins can be located like this:
           application.app/
           |
           \- Contents/
              |
              --MacOS/   < - application lives here - >
              |
              --plugins/ < - plugins live here - >
        */
        mLibHandle = ::dlopen((RFile::BundlePath() + "Contents/plugins/" + libName + ".so").c_str(), RTLD_LAZY);
    }
    if (mLibHandle == 0)
    {
        std::cerr << "(SharedLibrary) ERROR: dlopen failed for " << libName
                  << " with: \n\t" << dlerror() << std::endl;
    }

    mName = libName;

    return (mLibHandle!=NULL);
}

void*
SharedLibrary::GetProcAddress(const std::string &procName)
{
    if (mLibHandle)
    {
        return ::dlsym(mLibHandle, procName.c_str());
    }
    return NULL;
}

void
SharedLibrary::Close()
{
    if (mLibHandle)
    {
        mName = "";
        ::dlclose(mLibHandle);
        mLibHandle = NULL;
    }
}

#endif // WIN32

const std::string&
SharedLibrary::GetName() const
{
    return mName;
}