lm::LoadMonitor Class Reference

Load Monitor which collects performance data about computer. More...

#include <LoadMonitor.h>

Public Member Functions
	LoadMonitor (void)
	Ctor.
	~LoadMonitor (void)
	Dtor.
bool	Initialize (void)
	Initialize all counters.
bool	Terminate (void)
	Free all resources and disconnect from WMI provider.
LoadSample	TakeSample (void)
	Take performance sample.
HardwareDescription	GetHardwareDescription (void)
	Get hardware description.
Private Member Functions
LoadMonitor &	operator= (LoadMonitor &)
	Assignment.
	LoadMonitor (const LoadMonitor &)
	Prevent copying of the monitor.
void	LogInfo (const char *message) const
	Log info message to the output.
void	LogError (const char *message) const
	Log error message to the output.
unsigned long long	GetSampleTime () const
	Get current time in 100 ns intervals since Windows epoch.
unsigned long long	GetTSC (void) const
	Get CPU TSC.
Private Attributes
IWbemServices *	services
	WMI Services.
IWbemRefresher *	refresher
	Data refresher.
ProcessorEnumCache	processor
	CPU data cache.
MemoryEnumCache	memory
	Memory data cache.
NetworkEnumCache	network
	Network data cache.
DriveEnumCache	drive
	Drive data cache.
SystemEnumCache	system
	System data cache.
Data Structures
class	DriveEnumCache
	Cache for drive releated data. More...
class	MemoryEnumCache
	Cache for memory monitoring data. More...
class	NetworkEnumCache
	Cache for network monitoring data. More...
class	PerformanceCounterEnumCache
	Base class for enumerator cache. More...
class	ProcessorEnumCache
	Cache for data related to processor usage. More...
class	SystemEnumCache
	Cache for system related counters. More...

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Detailed Description

Load Monitor which collects performance data about computer.

WMI Hi-Perf data providers are used to collect all data. On WindowsXP and newer "formatted counters" are used. On older systems "raw counters" are used.

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Constructor & Destructor Documentation

lm::LoadMonitor::LoadMonitor

(

void

)

Ctor.

lm::LoadMonitor::~LoadMonitor

(

void

)

Dtor.

lm::LoadMonitor::LoadMonitor

(

const LoadMonitor &

)

[inline, private]

Prevent copying of the monitor.

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Member Function Documentation

HardwareDescription lm::LoadMonitor::GetHardwareDescription

(

void

)

Get hardware description.

Returns:

HardwareDescription object with names of drives and network adapters that are being monitored by the library.

unsigned long long lm::LoadMonitor::GetSampleTime

(

)

const [private]

Get current time in 100 ns intervals since Windows epoch.

Returns:

Current time in 100ns intervals since Windows epoch.

unsigned long long lm::LoadMonitor::GetTSC

(

void

)

const [inline, private]

Get CPU TSC.

Returns:

Timestamp counter for the CPU on which current thread is running.

bool lm::LoadMonitor::Initialize

(

void

)

Initialize all counters.

Connect to the WMI provider via COM and initialize all required resources. This will also add performance counters to the refresher. Error messages are written to the log file.

Returns:

true on success, false otherwise.

void lm::LoadMonitor::LogError

(

const char *

message

)

const [private]

Log error message to the output.

Writes error message to the standard output (if logging is enabled). Message is prepended with current time and date and text "ERROR". Each message is written on a new line.

Parameters:

message

Message to write to the output.

void lm::LoadMonitor::LogInfo

(

const char *

message

)

const [private]

Log info message to the output.

Writes info message to the standard output (if logging is enabled). Message is prepended with current time and date and text "INFO". Each message is written on a new line.

Parameters:

message

Message to write to the output.

LoadMonitor& lm::LoadMonitor::operator=

(

LoadMonitor &

)

[inline, private]

Assignment.

LoadSample lm::LoadMonitor::TakeSample

(

void

)

Take performance sample.

Request new data from WMI provider and store it in LoadSample.

Returns:

Sample containing data queried from the system. If an error occured, sample may not contain all data. However it is quarantee, that it will contain at least timestamp and TSC.

bool lm::LoadMonitor::Terminate

(

void

)

Free all resources and disconnect from WMI provider.

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Field Documentation

DriveEnumCache lm::LoadMonitor::drive [private]

Drive data cache.

MemoryEnumCache lm::LoadMonitor::memory [private]

Memory data cache.

NetworkEnumCache lm::LoadMonitor::network [private]

Network data cache.

ProcessorEnumCache lm::LoadMonitor::processor [private]

CPU data cache.

IWbemRefresher* lm::LoadMonitor::refresher [private]

Data refresher.

IWbemServices* lm::LoadMonitor::services [private]

WMI Services.

SystemEnumCache lm::LoadMonitor::system [private]

System data cache.

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

• LoadMonitor.h
• LoadMonitor.cpp

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