Device Class Reference

device abstraction of a powermanagable device More...

#include <device.h>

Inheritance diagram for Device:

List of all members.

Public Member Functions
	Device (const std::string &udi)
	constructor
virtual	~Device ()
	destructor
virtual bool	suspend (DPM_POWER_STATE state=DPM_STATE_D3, bool force=false)
	Set device into powersave state.
virtual bool	resume ()
	resumes a device from a powersave state
virtual bool	isActive ()=0
	check whether device is currently busy
virtual DPM_DEVICE_CLASS	deviceClass ()
	get the DPM_DEVICE_CLASS of the device
virtual std::string	udi ()
	get the udi assigned by hal of the device
virtual DPM_POWER_STATE	updateState ()
	get the current DPM_POWER_STATE of the device
DPM_POWER_STATE	readState (const std::string &state_file)
	read out current power state from file
Protected Attributes
std::string	_udi
	holding the udi assigned by hal
DPM_DEVICE_CLASS	_device_class
	the device class (DPM_DEVICE_CLASS)
std::string	_device_path
	the device path in system
std::string	_state_file
	the full path of the power state file
Private Attributes
DPM_POWER_STATE	_current_state
	the current power state the device is in

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Detailed Description

device abstraction of a powermanagable device

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Constructor & Destructor Documentation

Device::Device (  const std::string &  udi  )

constructor Parameters: udi  the udi of the device given by hal

Device::~Device (   )  [virtual]

destructor

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Member Function Documentation

DPM_DEVICE_CLASS Device::deviceClass (   )  [virtual]

get the DPM_DEVICE_CLASS of the device Return values: @ref  DPM_DEVICE_CLASS

virtual bool Device::isActive (   )  [pure virtual]

check whether device is currently busy pure virtual Returns: true if device is busy Implemented in UsbDevice, WlanDevice, SoundDevice, and LanDevice.

DPM_POWER_STATE Device::readState (  const std::string &  state_file  )

read out current power state from file Parameters: state_file  power state file to read from Returns: DPM_POWER_STATE

bool Device::resume (   )  [virtual]

resumes a device from a powersave state Returns: true if successfull, false on error

bool Device::suspend (  DPM_POWER_STATE  state = DPM_STATE_D3, bool  force = false )  [virtual]

Set device into powersave state. Parameters: state  the power state to set (default is DPM_STATE_D3) force  suspend device even if active (default is false) Returns: true if successfull, false on error

string Device::udi (   )  [virtual]

get the udi assigned by hal of the device Return values: udi  of device

DPM_POWER_STATE Device::updateState (   )  [virtual]

get the current DPM_POWER_STATE of the device reads out current power state from state file and updates local _current_state variable Returns: DPM_POWER_STATE

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Member Data Documentation

DPM_POWER_STATE Device::_current_state [private]

the current power state the device is in

DPM_DEVICE_CLASS Device::_device_class [protected]

the device class (DPM_DEVICE_CLASS)

std::string Device::_device_path [protected]

the device path in system returned by linux.sysfs_path capability

std::string Device::_state_file [protected]

the full path of the power state file e.g. _device_path + /device/power/state

std::string Device::_udi [protected]

holding the udi assigned by hal

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The documentation for this class was generated from the following files:

• /home/hmacht/devel/powersave/daemon/device.h
• /home/hmacht/devel/powersave/daemon/device.cpp

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