xbmc/platform/linux/powermanagement/LinuxPowerSyscall.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "LinuxPowerSyscall.h"
  10 #include "FallbackPowerSyscall.h"
  11 #if defined(HAS_DBUS)
  12 #include "ConsoleUPowerSyscall.h"
  13 #include "LogindUPowerSyscall.h"
  14 #include "UPowerSyscall.h"
  15 #endif // HAS_DBUS
  16
  17 #include <functional>
  18 #include <list>
  19 #include <memory>
  20 #include <utility>
  21
  22 IPowerSyscall* CLinuxPowerSyscall::CreateInstance()
  23 {
  24 #if defined(HAS_DBUS)
  25   std::unique_ptr<IPowerSyscall> bestPowerManager;
  26   std::unique_ptr<IPowerSyscall> currPowerManager;
  27   int bestCount = -1;
  28   int currCount = -1;
  29
  30   std::list< std::pair< std::function<bool()>,
  31                         std::function<IPowerSyscall*()> > > powerManagers =
  32   {
  33     std::make_pair(CConsoleUPowerSyscall::HasConsoleKitAndUPower,
  34                    [] { return new CConsoleUPowerSyscall(); }),
  35     std::make_pair(CLogindUPowerSyscall::HasLogind,
  36                    [] { return new CLogindUPowerSyscall(); }),
  37     std::make_pair(CUPowerSyscall::HasUPower,
  38                    [] { return new CUPowerSyscall(); })
  39   };
  40   for(const auto& powerManager : powerManagers)
  41   {
  42     if (powerManager.first())
  43     {
  44       currPowerManager.reset(powerManager.second());
  45       currCount = currPowerManager->CountPowerFeatures();
  46       if (currCount > bestCount)
  47       {
  48         bestCount = currCount;
  49         bestPowerManager = std::move(currPowerManager);
  50       }
  51       if (bestCount == IPowerSyscall::MAX_COUNT_POWER_FEATURES)
  52         break;
  53     }
  54   }
  55   if (bestPowerManager)
  56     return bestPowerManager.release();
  57   else
  58 #endif // HAS_DBUS
  59     return new CFallbackPowerSyscall();
  60 }
  61
  62 void CLinuxPowerSyscall::Register()
  63 {
  64   IPowerSyscall::RegisterPowerSyscall(CLinuxPowerSyscall::CreateInstance);
  65 }