Skip to content
This repository
Fetching contributors…

Cannot retrieve contributors at this time

file 142 lines (123 sloc) 4.284 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
/*
* Copyright (C) 2005-2012 Team XBMC
* http://www.xbmc.org
*
* 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; either version 2, or (at your option)
* any later version.
*
* 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/

#include "threads/SystemClock.h"
#include "system.h"
#include "SectionLoader.h"
#include "cores/DllLoader/DllLoaderContainer.h"
#include "threads/SingleLock.h"
#include "utils/log.h"
#include "utils/TimeUtils.h"

using namespace std;

#define g_sectionLoader XBMC_GLOBAL_USE(CSectionLoader)

// delay for unloading dll's
#define UNLOAD_DELAY 30*1000 // 30 sec.

//Define this to get loggin on all calls to load/unload sections/dlls
//#define LOGALL

CSectionLoader::CSectionLoader(void)
{}

CSectionLoader::~CSectionLoader(void)
{
  UnloadAll();
}

LibraryLoader *CSectionLoader::LoadDLL(const CStdString &dllname, bool bDelayUnload /*=true*/, bool bLoadSymbols /*=false*/)
{
  CSingleLock lock(g_sectionLoader.m_critSection);

  if (!dllname) return NULL;
  // check if it's already loaded, and increase the reference count if so
  for (int i = 0; i < (int)g_sectionLoader.m_vecLoadedDLLs.size(); ++i)
  {
    CDll& dll = g_sectionLoader.m_vecLoadedDLLs[i];
    if (dll.m_strDllName.Equals(dllname))
    {
      dll.m_lReferenceCount++;
      return dll.m_pDll;
    }
  }

  // ok, now load the dll
  CLog::Log(LOGDEBUG, "SECTION:LoadDLL(%s)\n", dllname.c_str());
  LibraryLoader* pDll = DllLoaderContainer::LoadModule(dllname.c_str(), NULL, bLoadSymbols);
  if (!pDll)
    return NULL;

  CDll newDLL;
  newDLL.m_strDllName = dllname;
  newDLL.m_lReferenceCount = 1;
  newDLL.m_bDelayUnload=bDelayUnload;
  newDLL.m_pDll=pDll;
  g_sectionLoader.m_vecLoadedDLLs.push_back(newDLL);

  return newDLL.m_pDll;
}

void CSectionLoader::UnloadDLL(const CStdString &dllname)
{
  CSingleLock lock(g_sectionLoader.m_critSection);

  if (!dllname) return;
  // check if it's already loaded, and decrease the reference count if so
  for (int i = 0; i < (int)g_sectionLoader.m_vecLoadedDLLs.size(); ++i)
  {
    CDll& dll = g_sectionLoader.m_vecLoadedDLLs[i];
    if (dll.m_strDllName.Equals(dllname))
    {
      dll.m_lReferenceCount--;
      if (0 == dll.m_lReferenceCount)
      {
        if (dll.m_bDelayUnload)
          dll.m_unloadDelayStartTick = XbmcThreads::SystemClockMillis();
        else
        {
          CLog::Log(LOGDEBUG,"SECTION:UnloadDll(%s)", dllname.c_str());
          if (dll.m_pDll)
            DllLoaderContainer::ReleaseModule(dll.m_pDll);
          g_sectionLoader.m_vecLoadedDLLs.erase(g_sectionLoader.m_vecLoadedDLLs.begin() + i);
        }

        return;
      }
    }
  }
}

void CSectionLoader::UnloadDelayed()
{
  CSingleLock lock(g_sectionLoader.m_critSection);

  // check if we can unload any unreferenced dlls
  for (int i = 0; i < (int)g_sectionLoader.m_vecLoadedDLLs.size(); ++i)
  {
    CDll& dll = g_sectionLoader.m_vecLoadedDLLs[i];
    if (dll.m_lReferenceCount == 0 && XbmcThreads::SystemClockMillis() - dll.m_unloadDelayStartTick > UNLOAD_DELAY)
    {
      CLog::Log(LOGDEBUG,"SECTION:UnloadDelayed(DLL: %s)", dll.m_strDllName.c_str());

      if (dll.m_pDll)
        DllLoaderContainer::ReleaseModule(dll.m_pDll);
      g_sectionLoader.m_vecLoadedDLLs.erase(g_sectionLoader.m_vecLoadedDLLs.begin() + i);
      return;
    }
  }
}

void CSectionLoader::UnloadAll()
{
  // delete the dll's
  CSingleLock lock(g_sectionLoader.m_critSection);
  vector<CDll>::iterator it = g_sectionLoader.m_vecLoadedDLLs.begin();
  while (it != g_sectionLoader.m_vecLoadedDLLs.end())
  {
    CDll& dll = *it;
    CLog::Log(LOGDEBUG,"SECTION:UnloadAll(DLL: %s)", dll.m_strDllName.c_str());
    if (dll.m_pDll)
      DllLoaderContainer::ReleaseModule(dll.m_pDll);
    it = g_sectionLoader.m_vecLoadedDLLs.erase(it);
  }
}
Something went wrong with that request. Please try again.