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Showing content from http://java-native-access.github.io/jna/5.17.0/javadoc/com/sun/jna/platform/win32/Pdh.html below:

Pdh (JNA API)

Alle Superschnittstellen:: AltCallingConvention, Library, StdCall, StdCallLibrary

Windows Performance Data Helper (a.k.a. PDH).

Autor:

Lyor Goldstein

Siehe auch:

Performance Counters

Verschachtelte Klassen - Übersicht
Verschachtelte Klassen

static class

Components of a counter path

static class

The data as it was collected from the counter provider.

static class

Information on time intervals as applied to the sampling of performance data.
Feldübersicht
Felder

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

static final int

Maximum counter name length.

static final int

Maximum full counter path length.

static final int

Maximum full counter log name length.

static final int

Maximum counter instance name length.

static final int

static final int

static final int

static final int

static final int

static final int

static final int
Methodenübersicht
int

Adds the specified counter to the query.

int

int

Closes all counters contained in the specified query, closes all handles related to the query, and frees all memory associated with the query.

int

Collects the current raw data value for all counters in the specified query and updates the status code of each counter.

int

Uses a separate thread to collect the current raw data value for all counters in the specified query.

int

Collects the current raw data value for all counters in the specified query and updates the status code of each counter.

int

Connects to the specified computer.

int

Returns the specified object's counter and instance names that exist on the specified computer or in the specified log file.

int

Returns the version of the currently installed Pdh.dll file.

int

int

Returns the counter index corresponding to the specified counter name.

int

Returns the performance object name or counter name corresponding to the specified index.

int

int

Creates a new query that is used to manage the collection of performance data.

int

Removes a counter from a query.

int

int

Validates that the counter is present on the computer specified in the counter path.

Felddetails
- INSTANCE static final Pdh INSTANCE
- PDH_MAX_COUNTER_NAME
  static final int PDH_MAX_COUNTER_NAME
  
  Maximum counter name length.
  Siehe auch:
  - Konstantenfeldwerte
- PDH_MAX_INSTANCE_NAME
  static final int PDH_MAX_INSTANCE_NAME
  
  Maximum counter instance name length.
  Siehe auch:
  - Konstantenfeldwerte
- PDH_MAX_COUNTER_PATH
  static final int PDH_MAX_COUNTER_PATH
  
  Maximum full counter path length.
  Siehe auch:
  - Konstantenfeldwerte
- PDH_MAX_DATASOURCE_PATH
  static final int PDH_MAX_DATASOURCE_PATH
  
  Maximum full counter log name length.
  Siehe auch:
  - Konstantenfeldwerte
- PDH_MORE_DATA
  static final int PDH_MORE_DATA
  Siehe auch:
  - Konstantenfeldwerte
- PDH_INSUFFICIENT_BUFFER
  static final int PDH_INSUFFICIENT_BUFFER
  Siehe auch:
  - Konstantenfeldwerte
- PDH_INVALID_ARGUMENT
  static final int PDH_INVALID_ARGUMENT
  Siehe auch:
  - Konstantenfeldwerte
- PDH_MEMORY_ALLOCATION_FAILURE
  static final int PDH_MEMORY_ALLOCATION_FAILURE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_CSTATUS_NO_MACHINE
  static final int PDH_CSTATUS_NO_MACHINE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_CSTATUS_NO_OBJECT
  static final int PDH_CSTATUS_NO_OBJECT
  Siehe auch:
  - Konstantenfeldwerte
- PDH_CVERSION_WIN40
  static final int PDH_CVERSION_WIN40
  Siehe auch:
  - Konstantenfeldwerte
- PDH_CVERSION_WIN50
  static final int PDH_CVERSION_WIN50
  Siehe auch:
  - Konstantenfeldwerte
- PDH_VERSION
  static final int PDH_VERSION
  Siehe auch:
  - Konstantenfeldwerte
- PDH_PATH_WBEM_RESULT
  static final int PDH_PATH_WBEM_RESULT
  Siehe auch:
  - Konstantenfeldwerte
- PDH_PATH_WBEM_INPUT
  static final int PDH_PATH_WBEM_INPUT
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_RAW
  static final int PDH_FMT_RAW
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_ANSI
  static final int PDH_FMT_ANSI
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_UNICODE
  static final int PDH_FMT_UNICODE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_LONG
  static final int PDH_FMT_LONG
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_DOUBLE
  static final int PDH_FMT_DOUBLE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_LARGE
  static final int PDH_FMT_LARGE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_NOSCALE
  static final int PDH_FMT_NOSCALE
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_1000
  static final int PDH_FMT_1000
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_NODATA
  static final int PDH_FMT_NODATA
  Siehe auch:
  - Konstantenfeldwerte
- PDH_FMT_NOCAP100
  static final int PDH_FMT_NOCAP100
  Siehe auch:
  - Konstantenfeldwerte
- PERF_DETAIL_COSTLY
  static final int PERF_DETAIL_COSTLY
  Siehe auch:
  - Konstantenfeldwerte
- PERF_DETAIL_STANDARD
  static final int PERF_DETAIL_STANDARD
  Siehe auch:
  - Konstantenfeldwerte
Methodendetails
- PdhConnectMachine int PdhConnectMachine(String szMachineName)
  Connects to the specified computer.
  Parameter:
  
  szMachineName - The name of the computer to connect to. If null, PDH connects to the local computer.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhConnectMachine
- PdhGetDllVersion
  Returns the version of the currently installed Pdh.dll file.
  Parameter:
  
  lpdwVersion - A variable that receives the version of Pdh.dll.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhGetDllVersion
- PdhOpenQuery
  Creates a new query that is used to manage the collection of performance data.
  Parameter:
  
  szDataSource - The name of the log file from which to retrieve performance data. If null, performance data is collected from a real-time data source.
  
  dwUserData - User-defined value to associate with this query.
  
  phQuery - (Out) Handle to the query. You use this handle in subsequent calls.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhOpenQuery
- PdhCloseQuery
  Closes all counters contained in the specified query, closes all handles related to the query, and frees all memory associated with the query.
  Parameter:
  
  hQuery - Handle to the query to close.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhCloseQuery
- PdhMakeCounterPath
  Parameter:
  
  pCounterPathElements - Structure that contains the members used to make up the path
  
  szFullPathBuffer - Caller-allocated buffer that receives a null-terminated counter path. The maximum length of a counter path is PDH_MAX_COUNTER_PATH. Set to null if pcchBufferSize is zero.
  
  pcchBufferSize - Size of the szFullPathBuffer buffer. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used.
  
  dwFlags - Format of the input and output counter values.
  
  Gibt zurück:
  
  ERROR_SUCCESS (or PDH_MORE_DATA)
  
  Siehe auch:
  - PdhMakeCounterPath
- PdhAddCounter
  Adds the specified counter to the query.
  Parameter:
  
  hQuery - Handle to the query to which you want to add the counter.
  
  szFullCounterPath - String that contains the counter path. The maximum length of a counter path is PDH_MAX_COUNTER_PATH.
  
  dwUserData - User-defined value.
  
  phCounter - (Out) Handle to the counter that was added to the query.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhAddCounter
  - Specifying a Counter Path
- PdhAddEnglishCounter
- PdhRemoveCounter
  Removes a counter from a query.
  Parameter:
  
  hCounter - Handle of the counter to remove from its query.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhRemoveCounter
- PdhGetRawCounterValue
  Parameter:
  
  hCounter - Handle of the counter from which to retrieve the current raw value.
  
  lpdwType - Receives the counter type - this parameter is optional
  
  pValue - The Pdh.PDH_RAW_COUNTER structure to receive the data
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhGetRawCounterValue
- PdhValidatePath int PdhValidatePath(String szFullCounterPath)
  Validates that the counter is present on the computer specified in the counter path.
  Parameter:
  
  szFullCounterPath - The counter path to validate
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhValidatePath
- PdhCollectQueryData
  Collects the current raw data value for all counters in the specified query and updates the status code of each counter.
  Parameter:
  
  hQuery - Handle to the query
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhCollectQueryData
- PdhCollectQueryDataEx
  Uses a separate thread to collect the current raw data value for all counters in the specified query. The function then signals the application-defined event and waits the specified time interval before returning.
  Parameter:
  
  hQuery - Handle to the query
  
  dwIntervalTime - Time interval to wait, in seconds.
  
  hNewDataEvent - Handle to the event that you want PDH to signal after the time interval expires. To create an event object, call the Kernel32.CreateEvent(com.sun.jna.platform.win32.WinBase.SECURITY_ATTRIBUTES, boolean, boolean, String) function
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhCollectQueryDataEx
- PdhCollectQueryDataWithTime
  Collects the current raw data value for all counters in the specified query and updates the status code of each counter.
  Parameter:
  
  hQuery - Handle to the query
  
  pllTimeStamp - Time stamp when the first counter value in the query was retrieved. The time is specified as WinBase.FILETIME.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhCollectQueryDataWithTime
- PdhSetQueryTimeRange
  Parameter:
  
  hQuery - Handle to the query.
  
  pInfo - A Pdh.PDH_TIME_INFO structure that specifies the time range.
  
  Gibt zurück:
  
  ERROR_SUCCESS if successful
  
  Siehe auch:
  - PdhSetQueryTimeRange
- PdhEnumObjectItems
  Returns the specified object's counter and instance names that exist on the specified computer or in the specified log file.
  Parameter:
  
  szDataSource - String that specifies the name of the log file used to enumerate the counter and instance names. If NULL, the function uses the computer specified in the szMachineName parameter to enumerate the names.
  
  szMachineName - String that specifies the name of the computer that contains the counter and instance names that you want to enumerate. Include the leading slashes in the computer name, for example, \\computername. If the szDataSource parameter is NULL, you can set szMachineName to NULL to specify the local computer.
  
  szObjectName - String that specifies the name of the object whose counter and instance names you want to enumerate.
  
  mszCounterList - Caller-allocated buffer that receives a list of null-terminated counter names provided by the specified object. The list contains unique counter names. The list is terminated by two NULL characters. Set to NULL if the pcchCounterListLengthparameter is zero.
  
  pcchCounterListLength - Size of the mszCounterList buffer, in TCHARs. If zero on input and the object exists, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer.
  
  mszInstanceList - Caller-allocated buffer that receives a list of null-terminated instance names provided by the specified object. The list contains unique instance names. The list is terminated by two NULL characters. Set to NULL if pcchInstanceListLength is zero.
  
  pcchInstanceListLength - Size of the mszInstanceList buffer, in TCHARs. If zero on input and the object exists, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. If the specified object does not support variable instances, then the returned value will be zero. If the specified object does support variable instances, but does not currently have any instances, then the value returned is 2, which is the size of an empty MULTI_SZ list string.
  
  dwDetailLevel - Detail level of the performance items to return. All items that are of the specified detail level or less will be returned.
  
  dwFlags - This parameter must be zero.
  
  Gibt zurück:
  
  If the function succeeds, it returns ERROR_SUCCESS. If the function fails, the return value is a system error code or a PDH error code.
  
  Siehe auch:
  - PdhEnumObjectItems
- PdhLookupPerfIndexByName
  Returns the counter index corresponding to the specified counter name.
  Parameter:
  
  szMachineName - Null-terminated string that specifies the name of the computer where the specified counter is located. The computer name can be specified by the DNS name or the IP address. If NULL, the function uses the local computer.
  
  szNameBuffer - Null-terminated string that contains the counter name.
  
  pdwIndex - Index of the counter.
  
  Gibt zurück:
  
  If the function succeeds, it returns ERROR_SUCCESS. If the function fails, the return value is a system error code or a PDH error code.
  
  Siehe auch:
  - PdhLookupPerfIndexByName
- PdhLookupPerfNameByIndex
  Returns the performance object name or counter name corresponding to the specified index.
  Parameter:
  
  szMachineName - Null-terminated string that specifies the name of the computer where the specified performance object or counter is located. The computer name can be specified by the DNS name or the IP address. If NULL, the function uses the local computer.
  
  dwNameIndex - Index of the performance object or counter.
  
  szNameBuffer - Caller-allocated buffer that receives the null-terminated name of the performance object or counter. Set to NULL if pcchNameBufferSize is zero.
  
  pcchNameBufferSize - Size of the szNameBuffer buffer, in TCHARs. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer.
  
  Gibt zurück:
  
  If the function succeeds, it returns ERROR_SUCCESS. If the function fails, the return value is a system error code or a PDH error code.
  
  Siehe auch:
  - PdhLookupPerfNameByIndex

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