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sharedlibrary.cpp

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00001 /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*-
00002 
00003    this file is part of rcssserver3D
00004    Fri May 9 2003
00005    Copyright (C) 2002,2003 Koblenz University
00006    Copyright (C) 2003 RoboCup Soccer Server 3D Maintenance Group
00007    $Id: sharedlibrary.cpp,v 1.6 2004/06/13 06:30:29 fruit Exp $
00008 
00009    This program is free software; you can redistribute it and/or modify
00010    it under the terms of the GNU General Public License as published by
00011    the Free Software Foundation; version 2 of the License.
00012 
00013    This program is distributed in the hope that it will be useful,
00014    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016    GNU General Public License for more details.
00017 
00018    You should have received a copy of the GNU General Public License
00019    along with this program; if not, write to the Free Software
00020    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00021 */
00022 #include "../sharedlibrary.h"
00023 #include <dlfcn.h>
00024 #include <iostream>
00025 
00026 using namespace salt;
00027 
00028 bool
00029 SharedLibrary::Open(const std::string &libName)
00030 {
00031     if (mLibHandle)
00032     {
00033         Close();
00034     }
00035 #if INIT_DEBUG
00036     std::cerr << "(SharedLibrary) Opening " << libName + ".so\n";
00037 #endif
00038     mLibHandle = ::dlopen((libName + ".so").c_str(), RTLD_LAZY);
00039 
00040     if (mLibHandle == NULL)
00041     {
00042         std::cerr << "(SharedLibrary) ERROR: dlopen faild for " << libName
00043                   << " with: \n\t" << dlerror() << std::endl;
00044     }
00045 
00046     return (mLibHandle!=NULL);
00047 }
00048 
00049 void*
00050 SharedLibrary::GetProcAddress(const std::string &procName)
00051 {
00052     if (mLibHandle)
00053     {
00054         return ::dlsym(mLibHandle, procName.c_str());
00055     }
00056     return NULL;
00057 }
00058 
00059 void
00060 SharedLibrary::Close()
00061 {
00062     if (mLibHandle)
00063     {
00064         ::dlclose(mLibHandle);
00065         mLibHandle = NULL;
00066     }
00067 }

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