xbmc/DynamicDll.cpp

   1 /*
   2  *      Copyright (C) 2005-2013 Team XBMC
   3  *      http://xbmc.org
   4  *
   5  *  This Program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This Program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with XBMC; see the file COPYING.  If not, see
  17  *  <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "DynamicDll.h"
  22 #include "SectionLoader.h"
  23 #include "filesystem/File.h"
  24 #include "utils/log.h"
  25
  26 using namespace XFILE;
  27
  28 DllDynamic::DllDynamic()
  29 {
  30   m_dll=NULL;
  31   m_DelayUnload=true;
  32 }
  33
  34 DllDynamic::DllDynamic(const std::string& strDllName):
  35   m_strDllName(strDllName)
  36 {
  37   m_dll=NULL;
  38   m_DelayUnload=true;
  39 }
  40
  41 DllDynamic::~DllDynamic()
  42 {
  43   Unload();
  44 }
  45
  46 bool DllDynamic::Load()
  47 {
  48   if (m_dll)
  49     return true;
  50
  51   if (!(m_dll=CSectionLoader::LoadDLL(m_strDllName, m_DelayUnload, LoadSymbols())))
  52     return false;
  53
  54   if (!ResolveExports())
  55   {
  56     CLog::Log(LOGERROR, "Unable to resolve exports from dll %s", m_strDllName.c_str());
  57     Unload();
  58     return false;
  59   }
  60
  61   return true;
  62 }
  63
  64 void DllDynamic::Unload()
  65 {
  66   if(m_dll)
  67     CSectionLoader::UnloadDLL(m_strDllName);
  68   m_dll=NULL;
  69 }
  70
  71 bool DllDynamic::CanLoad()
  72 {
  73   return CFile::Exists(m_strDllName);
  74 }
  75
  76 bool DllDynamic::EnableDelayedUnload(bool bOnOff)
  77 {
  78   if (m_dll)
  79     return false;
  80
  81   m_DelayUnload=bOnOff;
  82
  83   return true;
  84 }
  85
  86 bool DllDynamic::SetFile(const std::string& strDllName)
  87 {
  88   if (m_dll)
  89     return false;
  90
  91   m_strDllName=strDllName;
  92   return true;
  93 }
  94