lm::LoadMonitor::DriveEnumCache Class Reference

Cache for drive releated data. More...

Inheritance diagram for lm::LoadMonitor::DriveEnumCache:


Public Member Functions
	DriveEnumCache (void)
	Create new cache object.
virtual	~DriveEnumCache (void)
	Free used resources.
virtual bool	AddToRefresher (IWbemConfigureRefresher configure, IWbemServices services)
	Add object to the refresher.
virtual void	Release (void)
	Free resources.
virtual bool	QueryData (LoadSample &target)
	Query data.
bool	QueryNames (HardwareDescription &target)
	Query names of all drives.
Protected Member Functions
virtual bool	CacheImpl (IWbemObjectAccess *access_object)
	Cache property handles.
Private Attributes
IWbemHiPerfEnum *	enum_drives
	Enumerator for Win32_PerfRawData_PerfDisk_PhysicalDisk or Win32_PerfFormattedData_PerfDisk_PhysicalDisk.
long	enum_drives_id
	ID of the drive enumerator.
long	id_disk_write_bytes
	ID of the "DiskWriteBytesPerSec" property.
long	id_disk_read_bytes
	ID of the "DiskReadBytesPerSec" property.
long	id_disk_name
	ID of the "Name" property.

Detailed Description

Cache for drive releated data.

Constructor & Destructor Documentation

lm::LoadMonitor::DriveEnumCache::DriveEnumCache ( void )

Create new cache object.

lm::LoadMonitor::DriveEnumCache::~DriveEnumCache ( void ) [virtual]

Free used resources.

Member Function Documentation

bool lm::LoadMonitor::DriveEnumCache::AddToRefresher	(	IWbemConfigureRefresher *	configure,
		IWbemServices *	services
	)			`[virtual]`

Add object to the refresher.

Parameters:

	configure	Configure refresher which will be used to add required objects to the refresher.
	services	WMI service provider.

Returns:: true on success, false otherwise.

Implements lm::LoadMonitor::PerformanceCounterEnumCache.

bool lm::LoadMonitor::DriveEnumCache::CacheImpl ( IWbemObjectAccess * access_object ) [protected, virtual]

Cache property handles.

Parameters:

access_object

Object which contains all properties that need to be cached.

Returns:: true on success, false otherwise.

Implements lm::LoadMonitor::PerformanceCounterEnumCache.

bool lm::LoadMonitor::DriveEnumCache::QueryData ( LoadSample & target ) [virtual]

Query data.

Query data after it has been refreshed. This will collect all data from enumerators previously registered with refresher via AddToRefresher method and store resulting data in provided load sample. If data are stored in array (e.g. CPU usage on multi-processor machines), arrays will be automatically allocated. If query fails, sample will remain unmodified.

Parameters:

target

Reference to the load sample which will receive data.