lm::LoadMonitor::MemoryEnumCache Class Reference

Cache for memory monitoring data. More...

Inheritance diagram for lm::LoadMonitor::MemoryEnumCache:


Public Member Functions
	MemoryEnumCache (void)
	Create new cache object.
virtual	~MemoryEnumCache (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.
unsigned long long	GetSize ()
	Get total size of physcial memory in bytes.
Protected Member Functions
virtual bool	CacheImpl (IWbemObjectAccess *access_object)
	Cache property handles.
Private Attributes
IWbemHiPerfEnum *	enum_memory_usage
	Enumerator for Win32_PerfRawData_PerfOS_Memory or Win32_PerfFormattedData_PerfOS_Memory classes.
long	enum_memory_usage_id
	ID of the memory enumerator.
long	id_available
	ID of the "AvailableBytes" property.

Detailed Description

Cache for memory monitoring data.

Constructor & Destructor Documentation

lm::LoadMonitor::MemoryEnumCache::MemoryEnumCache ( void )

Create new cache object.

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

Free used resources.

Member Function Documentation

bool lm::LoadMonitor::MemoryEnumCache::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::MemoryEnumCache::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.

unsigned long long lm::LoadMonitor::MemoryEnumCache::GetSize ( )

Get total size of physcial memory in bytes.

Gets total size of physical memory in bytes. This method does not use WMI, just pure WinAPI (GlobalMemoryStatusEx).

Returns:: Size of physical memory in bytes.

bool lm::LoadMonitor::MemoryEnumCache::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.