xbmc/platform/linux/powermanagement/UPowerSyscall.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 "UPowerSyscall.h"
  10
  11 #include "utils/log.h"
  12
  13 CUPowerSource::CUPowerSource(const char *powerSource)
  14 {
  15   if(powerSource == NULL)
  16     m_powerSource = "";
  17   else
  18     m_powerSource = powerSource;
  19
  20   CVariant properties = CDBusUtil::GetAll("org.freedesktop.UPower", m_powerSource.c_str(), "org.freedesktop.UPower.Device");
  21   m_isRechargeable = properties["IsRechargeable"].asBoolean();
  22   Update();
  23 }
  24
  25 CUPowerSource::~CUPowerSource() = default;
  26
  27 void CUPowerSource::Update()
  28 {
  29   CVariant properties = CDBusUtil::GetAll("org.freedesktop.UPower", m_powerSource.c_str(), "org.freedesktop.UPower.Device");
  30   m_batteryLevel = properties["Percentage"].asDouble();
  31 }
  32
  33 bool CUPowerSource::IsRechargeable()
  34 {
  35   return m_isRechargeable;
  36 }
  37
  38 double CUPowerSource::BatteryLevel()
  39 {
  40   return m_batteryLevel;
  41 }
  42
  43 CUPowerSyscall::CUPowerSyscall()
  44 {
  45   CLog::Log(LOGINFO, "Selected UPower as PowerSyscall");
  46
  47   m_lowBattery = false;
  48
  49   //! @todo do not use dbus_connection_pop_message() that requires the use of a
  50   //! private connection
  51   if (m_connection.Connect(DBUS_BUS_SYSTEM, true))
  52   {
  53     dbus_connection_set_exit_on_disconnect(m_connection, false);
  54
  55     CDBusError error;
  56     dbus_bus_add_match(m_connection, "type='signal',interface='org.freedesktop.UPower'", error);
  57     dbus_connection_flush(m_connection);
  58
  59     if (error)
  60     {
  61       error.Log("UPower: Failed to attach to signal");
  62       m_connection.Destroy();
  63     }
  64   }
  65
  66   m_CanPowerdown = false;
  67   m_CanReboot    = false;
  68
  69   UpdateCapabilities();
  70
  71   EnumeratePowerSources();
  72 }
  73
  74 bool CUPowerSyscall::Powerdown()
  75 {
  76   return false;
  77 }
  78
  79 bool CUPowerSyscall::Suspend()
  80 {
  81   // UPower 0.9.1 does not signal sleeping unless you tell that its about to sleep...
  82   CDBusMessage aboutToSleepMessage("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "AboutToSleep");
  83   aboutToSleepMessage.SendAsyncSystem();
  84
  85   CDBusMessage message("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "Suspend");
  86   return message.SendAsyncSystem();
  87 }
  88
  89 bool CUPowerSyscall::Hibernate()
  90 {
  91   // UPower 0.9.1 does not signal sleeping unless you tell that its about to sleep...
  92   CDBusMessage aboutToSleepMessage("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "AboutToSleep");
  93   aboutToSleepMessage.SendAsyncSystem();
  94
  95   CDBusMessage message("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "Hibernate");
  96   return message.SendAsyncSystem();
  97 }
  98
  99 bool CUPowerSyscall::Reboot()
 100 {
 101   return false;
 102 }
 103
 104 bool CUPowerSyscall::CanPowerdown()
 105 {
 106   return m_CanPowerdown;
 107 }
 108
 109 bool CUPowerSyscall::CanSuspend()
 110 {
 111   return m_CanSuspend;
 112 }
 113
 114 bool CUPowerSyscall::CanHibernate()
 115 {
 116   return m_CanHibernate;
 117 }
 118
 119 bool CUPowerSyscall::CanReboot()
 120 {
 121   return m_CanReboot;
 122 }
 123
 124 int CUPowerSyscall::BatteryLevel()
 125 {
 126   unsigned int nBatteryCount  = 0;
 127   double       subCapacity    = 0;
 128   double       batteryLevel   = 0;
 129
 130   for (auto& itr : m_powerSources)
 131   {
 132     itr.Update();
 133     if (itr.IsRechargeable())
 134     {
 135       nBatteryCount++;
 136       subCapacity += itr.BatteryLevel();
 137     }
 138   }
 139
 140   if(nBatteryCount)
 141     batteryLevel = subCapacity / (double)nBatteryCount;
 142
 143   return (int) batteryLevel;
 144 }
 145
 146 void CUPowerSyscall::EnumeratePowerSources()
 147 {
 148   CDBusMessage message("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "EnumerateDevices");
 149   DBusMessage *reply = message.SendSystem();
 150   if (reply)
 151   {
 152     char** source  = NULL;
 153     int    length = 0;
 154
 155     if (dbus_message_get_args (reply, NULL, DBUS_TYPE_ARRAY, DBUS_TYPE_OBJECT_PATH, &source, &length, DBUS_TYPE_INVALID))
 156     {
 157       for (int i = 0; i < length; i++)
 158       {
 159         m_powerSources.emplace_back(source[i]);
 160       }
 161
 162       dbus_free_string_array(source);
 163     }
 164   }
 165 }
 166
 167 bool CUPowerSyscall::HasUPower()
 168 {
 169   return CDBusUtil::TryMethodCall(DBUS_BUS_SYSTEM, "org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "EnumerateDevices");
 170 }
 171
 172 bool CUPowerSyscall::PumpPowerEvents(IPowerEventsCallback *callback)
 173 {
 174   bool result = false;
 175
 176   if (m_connection)
 177   {
 178     dbus_connection_read_write(m_connection, 0);
 179     DBusMessagePtr msg(dbus_connection_pop_message(m_connection));
 180
 181     if (msg)
 182     {
 183       result = true;
 184       if (dbus_message_is_signal(msg.get(), "org.freedesktop.UPower", "Sleeping"))
 185         callback->OnSleep();
 186       else if (dbus_message_is_signal(msg.get(), "org.freedesktop.UPower", "Resuming"))
 187         callback->OnWake();
 188       else if (dbus_message_is_signal(msg.get(), "org.freedesktop.UPower", "Changed"))
 189       {
 190         bool lowBattery = m_lowBattery;
 191         UpdateCapabilities();
 192         if (m_lowBattery && !lowBattery)
 193           callback->OnLowBattery();
 194       }
 195       else
 196         CLog::Log(LOGDEBUG, "UPower: Received an unknown signal {}",
 197                   dbus_message_get_member(msg.get()));
 198     }
 199   }
 200   return result;
 201 }
 202
 203 void CUPowerSyscall::UpdateCapabilities()
 204 {
 205   m_CanSuspend   = CDBusUtil::GetVariant("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "CanSuspend").asBoolean(false);
 206   m_CanHibernate = CDBusUtil::GetVariant("org.freedesktop.UPower", "/org/freedesktop/UPower", "org.freedesktop.UPower", "CanHibernate").asBoolean(false);
 207 }