oshi.util.platform.windows

Class PdhUtil

java.lang.Object

oshi.util.platform.windows.PdhUtil

public class PdhUtil
extends Object

Provides access to open pdh queries and add/query counters

Author:

widdis[at]gmail[dot]com

Constructor Summary

Constructors

Constructor and Description
PdhUtil()

Method Summary

Modifier and Type	Method and Description
static void	addCounter(com.sun.jna.ptr.PointerByReference query, String path, com.sun.jna.ptr.PointerByReference p) Adds a pdh counter to a query
static boolean	openQuery(com.sun.jna.ptr.PointerByReference p) Open a pdh query
static long	queryCounter(com.sun.jna.ptr.PointerByReference counter) Get value of pdh counter
static boolean	updateCounters(com.sun.jna.ptr.PointerByReference query) Update counters to values since the last call

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PdhUtil

public PdhUtil()

Method Detail

openQuery

public static boolean openQuery(com.sun.jna.ptr.PointerByReference p)

Open a pdh query

Parameters:

p - pointer to the query

Returns:

true if successful

addCounter

public static void addCounter(com.sun.jna.ptr.PointerByReference query,
                              String path,
                              com.sun.jna.ptr.PointerByReference p)

Adds a pdh counter to a query

Parameters:

query - Pointer to the query to add the counter

path - String name of the PerfMon counter

p - Pointer to the counter

updateCounters

public static boolean updateCounters(com.sun.jna.ptr.PointerByReference query)

Update counters to values since the last call

Parameters:

query - The query whose counters to update

Returns:

True if successful

queryCounter

public static long queryCounter(com.sun.jna.ptr.PointerByReference counter)

Get value of pdh counter

Parameters:

counter - The counter to get the value of

Returns:

long value of the counter x 1000