639 lines
31 KiB
Go
639 lines
31 KiB
Go
// Copyright (c) 2010-2024 The win Authors. All rights reserved.
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// Copyright (c) 2024 The prometheus-community Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The names of the authors may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// This is the official list of 'win' authors for copyright purposes.
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//
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// Alexander Neumann <an2048@googlemail.com>
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// Joseph Watson <jtwatson@linux-consulting.us>
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// Kevin Pors <krpors@gmail.com>
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//go:build windows
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package perfdata
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import (
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"fmt"
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"time"
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"unsafe"
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"github.com/prometheus-community/windows_exporter/pkg/headers/kernel32"
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"golang.org/x/sys/windows"
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)
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// Error codes.
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const (
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ErrorSuccess = 0
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ErrorFailure = 1
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ErrorInvalidFunction = 1
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EpochDifferenceMicros int64 = 11644473600000000
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)
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type (
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HANDLE uintptr
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)
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// PDH error codes, which can be returned by all Pdh* functions. Taken from mingw-w64 pdhmsg.h
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const (
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PdhCstatusValidData = 0x00000000 // The returned data is valid.
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PdhCstatusNewData = 0x00000001 // The return data value is valid and different from the last sample.
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PdhCstatusNoMachine = 0x800007D0 // Unable to connect to the specified computer, or the computer is offline.
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PdhCstatusNoInstance = 0x800007D1
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PdhMoreData = 0x800007D2 // The PdhGetFormattedCounterArray* function can return this if there's 'more data to be displayed'.
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PdhCstatusItemNotValidated = 0x800007D3
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PdhRetry = 0x800007D4
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PdhNoData = 0x800007D5 // The query does not currently contain any counters (for example, limited access)
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PdhCalcNegativeDenominator = 0x800007D6
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PdhCalcNegativeTimebase = 0x800007D7
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PdhCalcNegativeValue = 0x800007D8
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PdhDialogCancelled = 0x800007D9
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PdhEndOfLogFile = 0x800007DA
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PdhAsyncQueryTimeout = 0x800007DB
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PdhCannotSetDefaultRealtimeDatasource = 0x800007DC
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PdhCstatusNoObject = 0xC0000BB8
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PdhCstatusNoCounter = 0xC0000BB9 // The specified counter could not be found.
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PdhCstatusInvalidData = 0xC0000BBA // The counter was successfully found, but the data returned is not valid.
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PdhMemoryAllocationFailure = 0xC0000BBB
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PdhInvalidHandle = 0xC0000BBC
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PdhInvalidArgument = 0xC0000BBD // Required argument is missing or incorrect.
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PdhFunctionNotFound = 0xC0000BBE
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PdhCstatusNoCountername = 0xC0000BBF
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PdhCstatusBadCountername = 0xC0000BC0 // Unable to parse the counter path. Check the format and syntax of the specified path.
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PdhInvalidBuffer = 0xC0000BC1
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PdhInsufficientBuffer = 0xC0000BC2
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PdhCannotConnectMachine = 0xC0000BC3
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PdhInvalidPath = 0xC0000BC4
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PdhInvalidInstance = 0xC0000BC5
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PdhInvalidData = 0xC0000BC6 // specified counter does not contain valid data or a successful status code.
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PdhNoDialogData = 0xC0000BC7
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PdhCannotReadNameStrings = 0xC0000BC8
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PdhLogFileCreateError = 0xC0000BC9
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PdhLogFileOpenError = 0xC0000BCA
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PdhLogTypeNotFound = 0xC0000BCB
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PdhNoMoreData = 0xC0000BCC
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PdhEntryNotInLogFile = 0xC0000BCD
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PdhDataSourceIsLogFile = 0xC0000BCE
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PdhDataSourceIsRealTime = 0xC0000BCF
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PdhUnableReadLogHeader = 0xC0000BD0
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PdhFileNotFound = 0xC0000BD1
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PdhFileAlreadyExists = 0xC0000BD2
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PdhNotImplemented = 0xC0000BD3
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PdhStringNotFound = 0xC0000BD4
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PdhUnableMapNameFiles = 0x80000BD5
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PdhUnknownLogFormat = 0xC0000BD6
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PdhUnknownLogsvcCommand = 0xC0000BD7
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PdhLogsvcQueryNotFound = 0xC0000BD8
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PdhLogsvcNotOpened = 0xC0000BD9
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PdhWbemError = 0xC0000BDA
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PdhAccessDenied = 0xC0000BDB
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PdhLogFileTooSmall = 0xC0000BDC
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PdhInvalidDatasource = 0xC0000BDD
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PdhInvalidSqldb = 0xC0000BDE
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PdhNoCounters = 0xC0000BDF
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PdhSQLAllocFailed = 0xC0000BE0
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PdhSQLAllocconFailed = 0xC0000BE1
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PdhSQLExecDirectFailed = 0xC0000BE2
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PdhSQLFetchFailed = 0xC0000BE3
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PdhSQLRowcountFailed = 0xC0000BE4
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PdhSQLMoreResultsFailed = 0xC0000BE5
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PdhSQLConnectFailed = 0xC0000BE6
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PdhSQLBindFailed = 0xC0000BE7
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PdhCannotConnectWmiServer = 0xC0000BE8
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PdhPlaCollectionAlreadyRunning = 0xC0000BE9
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PdhPlaErrorScheduleOverlap = 0xC0000BEA
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PdhPlaCollectionNotFound = 0xC0000BEB
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PdhPlaErrorScheduleElapsed = 0xC0000BEC
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PdhPlaErrorNostart = 0xC0000BED
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PdhPlaErrorAlreadyExists = 0xC0000BEE
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PdhPlaErrorTypeMismatch = 0xC0000BEF
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PdhPlaErrorFilepath = 0xC0000BF0
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PdhPlaServiceError = 0xC0000BF1
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PdhPlaValidationError = 0xC0000BF2
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PdhPlaValidationWarning = 0x80000BF3
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PdhPlaErrorNameTooLong = 0xC0000BF4
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PdhInvalidSQLLogFormat = 0xC0000BF5
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PdhCounterAlreadyInQuery = 0xC0000BF6
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PdhBinaryLogCorrupt = 0xC0000BF7
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PdhLogSampleTooSmall = 0xC0000BF8
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PdhOsLaterVersion = 0xC0000BF9
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PdhOsEarlierVersion = 0xC0000BFA
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PdhIncorrectAppendTime = 0xC0000BFB
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PdhUnmatchedAppendCounter = 0xC0000BFC
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PdhSQLAlterDetailFailed = 0xC0000BFD
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PdhQueryPerfDataTimeout = 0xC0000BFE
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)
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var PDHErrors = map[uint32]string{
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PdhCstatusValidData: "PDH_CSTATUS_VALID_DATA",
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PdhCstatusNewData: "PDH_CSTATUS_NEW_DATA",
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PdhCstatusNoMachine: "PDH_CSTATUS_NO_MACHINE",
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PdhCstatusNoInstance: "PDH_CSTATUS_NO_INSTANCE",
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PdhMoreData: "PDH_MORE_DATA",
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PdhCstatusItemNotValidated: "PDH_CSTATUS_ITEM_NOT_VALIDATED",
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PdhRetry: "PDH_RETRY",
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PdhNoData: "PDH_NO_DATA",
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PdhCalcNegativeDenominator: "PDH_CALC_NEGATIVE_DENOMINATOR",
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PdhCalcNegativeTimebase: "PDH_CALC_NEGATIVE_TIMEBASE",
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PdhCalcNegativeValue: "PDH_CALC_NEGATIVE_VALUE",
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PdhDialogCancelled: "PDH_DIALOG_CANCELLED",
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PdhEndOfLogFile: "PDH_END_OF_LOG_FILE",
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PdhAsyncQueryTimeout: "PDH_ASYNC_QUERY_TIMEOUT",
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PdhCannotSetDefaultRealtimeDatasource: "PDH_CANNOT_SET_DEFAULT_REALTIME_DATASOURCE",
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PdhCstatusNoObject: "PDH_CSTATUS_NO_OBJECT",
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PdhCstatusNoCounter: "PDH_CSTATUS_NO_COUNTER",
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PdhCstatusInvalidData: "PDH_CSTATUS_INVALID_DATA",
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PdhMemoryAllocationFailure: "PDH_MEMORY_ALLOCATION_FAILURE",
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PdhInvalidHandle: "PDH_INVALID_HANDLE",
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PdhInvalidArgument: "PDH_INVALID_ARGUMENT",
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PdhFunctionNotFound: "PDH_FUNCTION_NOT_FOUND",
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PdhCstatusNoCountername: "PDH_CSTATUS_NO_COUNTERNAME",
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PdhCstatusBadCountername: "PDH_CSTATUS_BAD_COUNTERNAME",
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PdhInvalidBuffer: "PDH_INVALID_BUFFER",
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PdhInsufficientBuffer: "PDH_INSUFFICIENT_BUFFER",
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PdhCannotConnectMachine: "PDH_CANNOT_CONNECT_MACHINE",
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PdhInvalidPath: "PDH_INVALID_PATH",
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PdhInvalidInstance: "PDH_INVALID_INSTANCE",
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PdhInvalidData: "PDH_INVALID_DATA",
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PdhNoDialogData: "PDH_NO_DIALOG_DATA",
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PdhCannotReadNameStrings: "PDH_CANNOT_READ_NAME_STRINGS",
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PdhLogFileCreateError: "PDH_LOG_FILE_CREATE_ERROR",
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PdhLogFileOpenError: "PDH_LOG_FILE_OPEN_ERROR",
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PdhLogTypeNotFound: "PDH_LOG_TYPE_NOT_FOUND",
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PdhNoMoreData: "PDH_NO_MORE_DATA",
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PdhEntryNotInLogFile: "PDH_ENTRY_NOT_IN_LOG_FILE",
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PdhDataSourceIsLogFile: "PDH_DATA_SOURCE_IS_LOG_FILE",
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PdhDataSourceIsRealTime: "PDH_DATA_SOURCE_IS_REAL_TIME",
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PdhUnableReadLogHeader: "PDH_UNABLE_READ_LOG_HEADER",
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PdhFileNotFound: "PDH_FILE_NOT_FOUND",
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PdhFileAlreadyExists: "PDH_FILE_ALREADY_EXISTS",
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PdhNotImplemented: "PDH_NOT_IMPLEMENTED",
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PdhStringNotFound: "PDH_STRING_NOT_FOUND",
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PdhUnableMapNameFiles: "PDH_UNABLE_MAP_NAME_FILES",
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PdhUnknownLogFormat: "PDH_UNKNOWN_LOG_FORMAT",
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PdhUnknownLogsvcCommand: "PDH_UNKNOWN_LOGSVC_COMMAND",
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PdhLogsvcQueryNotFound: "PDH_LOGSVC_QUERY_NOT_FOUND",
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PdhLogsvcNotOpened: "PDH_LOGSVC_NOT_OPENED",
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PdhWbemError: "PDH_WBEM_ERROR",
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PdhAccessDenied: "PDH_ACCESS_DENIED",
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PdhLogFileTooSmall: "PDH_LOG_FILE_TOO_SMALL",
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PdhInvalidDatasource: "PDH_INVALID_DATASOURCE",
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PdhInvalidSqldb: "PDH_INVALID_SQLDB",
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PdhNoCounters: "PDH_NO_COUNTERS",
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PdhSQLAllocFailed: "PDH_SQL_ALLOC_FAILED",
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PdhSQLAllocconFailed: "PDH_SQL_ALLOCCON_FAILED",
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PdhSQLExecDirectFailed: "PDH_SQL_EXEC_DIRECT_FAILED",
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PdhSQLFetchFailed: "PDH_SQL_FETCH_FAILED",
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PdhSQLRowcountFailed: "PDH_SQL_ROWCOUNT_FAILED",
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PdhSQLMoreResultsFailed: "PDH_SQL_MORE_RESULTS_FAILED",
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PdhSQLConnectFailed: "PDH_SQL_CONNECT_FAILED",
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PdhSQLBindFailed: "PDH_SQL_BIND_FAILED",
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PdhCannotConnectWmiServer: "PDH_CANNOT_CONNECT_WMI_SERVER",
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PdhPlaCollectionAlreadyRunning: "PDH_PLA_COLLECTION_ALREADY_RUNNING",
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PdhPlaErrorScheduleOverlap: "PDH_PLA_ERROR_SCHEDULE_OVERLAP",
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PdhPlaCollectionNotFound: "PDH_PLA_COLLECTION_NOT_FOUND",
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PdhPlaErrorScheduleElapsed: "PDH_PLA_ERROR_SCHEDULE_ELAPSED",
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PdhPlaErrorNostart: "PDH_PLA_ERROR_NOSTART",
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PdhPlaErrorAlreadyExists: "PDH_PLA_ERROR_ALREADY_EXISTS",
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PdhPlaErrorTypeMismatch: "PDH_PLA_ERROR_TYPE_MISMATCH",
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PdhPlaErrorFilepath: "PDH_PLA_ERROR_FILEPATH",
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PdhPlaServiceError: "PDH_PLA_SERVICE_ERROR",
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PdhPlaValidationError: "PDH_PLA_VALIDATION_ERROR",
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PdhPlaValidationWarning: "PDH_PLA_VALIDATION_WARNING",
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PdhPlaErrorNameTooLong: "PDH_PLA_ERROR_NAME_TOO_LONG",
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PdhInvalidSQLLogFormat: "PDH_INVALID_SQL_LOG_FORMAT",
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PdhCounterAlreadyInQuery: "PDH_COUNTER_ALREADY_IN_QUERY",
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PdhBinaryLogCorrupt: "PDH_BINARY_LOG_CORRUPT",
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PdhLogSampleTooSmall: "PDH_LOG_SAMPLE_TOO_SMALL",
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PdhOsLaterVersion: "PDH_OS_LATER_VERSION",
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PdhOsEarlierVersion: "PDH_OS_EARLIER_VERSION",
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PdhIncorrectAppendTime: "PDH_INCORRECT_APPEND_TIME",
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PdhUnmatchedAppendCounter: "PDH_UNMATCHED_APPEND_COUNTER",
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PdhSQLAlterDetailFailed: "PDH_SQL_ALTER_DETAIL_FAILED",
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PdhQueryPerfDataTimeout: "PDH_QUERY_PERF_DATA_TIMEOUT",
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}
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// Formatting options for GetFormattedCounterValue().
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//
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//goland:noinspection GoUnusedConst
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const (
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PdhFmtRaw = 0x00000010
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PdhFmtAnsi = 0x00000020
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PdhFmtUnicode = 0x00000040
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PdhFmtLong = 0x00000100 // Return data as a long int.
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PdhFmtDouble = 0x00000200 // Return data as a double precision floating point real.
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PdhFmtLarge = 0x00000400 // Return data as a 64 bit integer.
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PdhFmtNoscale = 0x00001000 // can be OR-ed: Do not apply the counter's default scaling factor.
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PdhFmt1000 = 0x00002000 // can be OR-ed: multiply the actual value by 1,000.
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PdhFmtNodata = 0x00004000 // can be OR-ed: unknown what this is for, MSDN says nothing.
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PdhFmtNocap100 = 0x00008000 // can be OR-ed: do not cap values > 100.
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PerfDetailCostly = 0x00010000
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PerfDetailStandard = 0x0000FFFF
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)
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type (
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pdhQueryHandle HANDLE // query handle
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pdhCounterHandle HANDLE // counter handle
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)
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var (
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libPdhDll = windows.NewLazySystemDLL("pdh.dll")
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pdhAddCounterW = libPdhDll.NewProc("PdhAddCounterW")
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pdhAddEnglishCounterW = libPdhDll.NewProc("PdhAddEnglishCounterW")
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pdhCloseQuery = libPdhDll.NewProc("PdhCloseQuery")
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pdhCollectQueryData = libPdhDll.NewProc("PdhCollectQueryData")
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pdhCollectQueryDataWithTime = libPdhDll.NewProc("PdhCollectQueryDataWithTime")
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pdhGetFormattedCounterValue = libPdhDll.NewProc("PdhGetFormattedCounterValue")
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pdhGetFormattedCounterArrayW = libPdhDll.NewProc("PdhGetFormattedCounterArrayW")
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pdhOpenQuery = libPdhDll.NewProc("PdhOpenQuery")
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pdhValidatePathW = libPdhDll.NewProc("PdhValidatePathW")
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pdhExpandWildCardPathW = libPdhDll.NewProc("PdhExpandWildCardPathW")
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pdhGetCounterInfoW = libPdhDll.NewProc("PdhGetCounterInfoW")
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pdhGetRawCounterValue = libPdhDll.NewProc("PdhGetRawCounterValue")
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pdhGetRawCounterArrayW = libPdhDll.NewProc("PdhGetRawCounterArrayW")
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pdhPdhGetCounterTimeBase = libPdhDll.NewProc("PdhGetCounterTimeBase")
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)
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// PdhAddCounter adds the specified counter to the query. This is the internationalized version. Preferably, use the
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// function PdhAddEnglishCounter instead. hQuery is the query handle, which has been fetched by PdhOpenQuery.
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// szFullCounterPath is a full, internationalized counter path (this will differ per Windows language version).
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// dwUserData is a 'user-defined value', which becomes part of the counter information. To retrieve this value
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// later, call PdhGetCounterInfo() and access dwQueryUserData of the PdhCounterInfo structure.
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//
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// Examples of szFullCounterPath (in an English version of Windows):
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//
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// \\Processor(_Total)\\% Idle Time
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// \\Processor(_Total)\\% Processor Time
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// \\LogicalDisk(C:)\% Free Space
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//
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// To view all (internationalized...) counters on a system, there are three non-programmatic ways: perfmon utility,
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// the typeperf command, and the registry editor. perfmon.exe is perhaps the easiest way, because it's basically a
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// full implementation of the pdh.dll API, except with a GUI and all that. The registry setting also provides an
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// interface to the available counters, and can be found at the following key:
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//
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// HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Perflib\CurrentLanguage
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//
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// This registry key contains several values as follows:
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//
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// 1
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// 1847
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// 2
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// System
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// 4
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// Memory
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// 6
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// % Processor Time
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// ... many, many more
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//
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// Somehow, these numeric values can be used as szFullCounterPath too:
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//
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// \2\6 will correspond to \\System\% Processor Time
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//
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// The typeperf command may also be pretty easy. To find all performance counters, simply execute:
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//
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// typeperf -qx
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func PdhAddCounter(hQuery pdhQueryHandle, szFullCounterPath string, dwUserData uintptr, phCounter *pdhCounterHandle) uint32 {
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ptxt, _ := windows.UTF16PtrFromString(szFullCounterPath)
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ret, _, _ := pdhAddCounterW.Call(
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uintptr(hQuery),
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uintptr(unsafe.Pointer(ptxt)),
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dwUserData,
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uintptr(unsafe.Pointer(phCounter)))
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return uint32(ret)
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}
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// PdhAddEnglishCounterSupported returns true if PdhAddEnglishCounterW Win API function was found in pdh.dll.
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// PdhAddEnglishCounterW function is not supported on pre-Windows Vista systems.
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func PdhAddEnglishCounterSupported() bool {
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return pdhAddEnglishCounterW != nil
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}
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// PdhAddEnglishCounter adds the specified language-neutral counter to the query. See the PdhAddCounter function. This function only exists on
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// Windows versions higher than Vista.
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func PdhAddEnglishCounter(hQuery pdhQueryHandle, szFullCounterPath string, dwUserData uintptr, phCounter *pdhCounterHandle) uint32 {
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if pdhAddEnglishCounterW == nil {
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return ErrorInvalidFunction
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}
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ptxt, _ := windows.UTF16PtrFromString(szFullCounterPath)
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ret, _, _ := pdhAddEnglishCounterW.Call(
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uintptr(hQuery),
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uintptr(unsafe.Pointer(ptxt)),
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dwUserData,
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uintptr(unsafe.Pointer(phCounter)))
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return uint32(ret)
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}
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// PdhCloseQuery closes all counters contained in the specified query, closes all handles related to the query,
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// and frees all memory associated with the query.
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func PdhCloseQuery(hQuery pdhQueryHandle) uint32 {
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ret, _, _ := pdhCloseQuery.Call(uintptr(hQuery))
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return uint32(ret)
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}
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// PdhCollectQueryData collects the current raw data value for all counters in the specified query and updates the status
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// code of each counter. With some counters, this function needs to be repeatedly called before the value
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// of the counter can be extracted with PdhGetFormattedCounterValue(). For example, the following code
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// requires at least two calls:
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//
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// var handle win.PDH_HQUERY
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// var counterHandle win.PDH_HCOUNTER
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// ret := win.PdhOpenQuery(0, 0, &handle)
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// ret = win.PdhAddEnglishCounter(handle, "\\Processor(_Total)\\% Idle Time", 0, &counterHandle)
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// var derp win.PDH_FMT_COUNTERVALUE_DOUBLE
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//
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// ret = win.PdhCollectQueryData(handle)
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// fmt.Printf("Collect return code is %x\n", ret) // return code will be PDH_CSTATUS_INVALID_DATA
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// ret = win.PdhGetFormattedCounterValueDouble(counterHandle, 0, &derp)
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//
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// ret = win.PdhCollectQueryData(handle)
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// fmt.Printf("Collect return code is %x\n", ret) // return code will be ERROR_SUCCESS
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// ret = win.PdhGetFormattedCounterValueDouble(counterHandle, 0, &derp)
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//
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// The PdhCollectQueryData will return an error in the first call because it needs two values for
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// displaying the correct data for the processor idle time. The second call will have a 0 return code.
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func PdhCollectQueryData(hQuery pdhQueryHandle) uint32 {
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ret, _, _ := pdhCollectQueryData.Call(uintptr(hQuery))
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return uint32(ret)
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}
|
|
|
|
// PdhCollectQueryDataWithTime queries data from perfmon, retrieving the device/windows timestamp from the node it was collected on.
|
|
// Converts the filetime structure to a GO time class and returns the native time.
|
|
func PdhCollectQueryDataWithTime(hQuery pdhQueryHandle) (uint32, time.Time) {
|
|
var localFileTime windows.Filetime
|
|
|
|
ret, _, _ := pdhCollectQueryDataWithTime.Call(uintptr(hQuery), uintptr(unsafe.Pointer(&localFileTime)))
|
|
|
|
if ret == ErrorSuccess {
|
|
var utcFileTime windows.Filetime
|
|
|
|
if ret := kernel32.LocalFileTimeToFileTime(&localFileTime, &utcFileTime); ret == 0 {
|
|
return uint32(ErrorFailure), time.Now()
|
|
}
|
|
|
|
retTime := time.Unix(0, utcFileTime.Nanoseconds())
|
|
|
|
return uint32(ErrorSuccess), retTime
|
|
}
|
|
|
|
return uint32(ret), time.Now()
|
|
}
|
|
|
|
// PdhGetFormattedCounterValueDouble formats the given hCounter using a 'double'. The result is set into the specialized union struct pValue.
|
|
// This function does not directly translate to a Windows counterpart due to union specialization tricks.
|
|
func PdhGetFormattedCounterValueDouble(hCounter pdhCounterHandle, lpdwType *uint32, pValue *PdhFmtCountervalueDouble) uint32 {
|
|
ret, _, _ := pdhGetFormattedCounterValue.Call(
|
|
uintptr(hCounter),
|
|
uintptr(PdhFmtDouble|PdhFmtNocap100),
|
|
uintptr(unsafe.Pointer(lpdwType)),
|
|
uintptr(unsafe.Pointer(pValue)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhGetFormattedCounterArrayDouble returns an array of formatted counter values. Use this function when you want to format the counter values of a
|
|
// counter that contains a wildcard character for the instance name. The itemBuffer must a slice of type PdhFmtCountervalueItemDouble.
|
|
// An example of how this function can be used:
|
|
//
|
|
// okPath := "\\Process(*)\\% Processor Time" // notice the wildcard * character
|
|
//
|
|
// // omitted all necessary stuff ...
|
|
//
|
|
// var bufSize uint32
|
|
// var bufCount uint32
|
|
// var size uint32 = uint32(unsafe.Sizeof(win.PDH_FMT_COUNTERVALUE_ITEM_DOUBLE{}))
|
|
// var emptyBuf [1]win.PDH_FMT_COUNTERVALUE_ITEM_DOUBLE // need at least 1 addressable null ptr.
|
|
//
|
|
// for {
|
|
// // collect
|
|
// ret := win.PdhCollectQueryData(queryHandle)
|
|
// if ret == win.ERROR_SUCCESS {
|
|
// ret = win.PdhGetFormattedCounterArrayDouble(counterHandle, &bufSize, &bufCount, &emptyBuf[0]) // uses null ptr here according to MSDN.
|
|
// if ret == win.PDH_MORE_DATA {
|
|
// filledBuf := make([]win.PDH_FMT_COUNTERVALUE_ITEM_DOUBLE, bufCount*size)
|
|
// ret = win.PdhGetFormattedCounterArrayDouble(counterHandle, &bufSize, &bufCount, &filledBuf[0])
|
|
// for i := 0; i < int(bufCount); i++ {
|
|
// c := filledBuf[i]
|
|
// var s string = win.UTF16PtrToString(c.SzName)
|
|
// fmt.Printf("Index %d -> %s, value %v\n", i, s, c.FmtValue.DoubleValue)
|
|
// }
|
|
//
|
|
// filledBuf = nil
|
|
// // Need to at least set bufSize to zero, because if not, the function will not
|
|
// // return PDH_MORE_DATA and will not set the bufSize.
|
|
// bufCount = 0
|
|
// bufSize = 0
|
|
// }
|
|
//
|
|
// time.Sleep(2000 * time.Millisecond)
|
|
// }
|
|
// }
|
|
func PdhGetFormattedCounterArrayDouble(hCounter pdhCounterHandle, lpdwBufferSize *uint32, lpdwBufferCount *uint32, itemBuffer *byte) uint32 {
|
|
ret, _, _ := pdhGetFormattedCounterArrayW.Call(
|
|
uintptr(hCounter),
|
|
uintptr(PdhFmtDouble|PdhFmtNocap100),
|
|
uintptr(unsafe.Pointer(lpdwBufferSize)),
|
|
uintptr(unsafe.Pointer(lpdwBufferCount)),
|
|
uintptr(unsafe.Pointer(itemBuffer)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhOpenQuery creates a new query that is used to manage the collection of performance data.
|
|
// szDataSource is a null terminated string that specifies the name of the log file from which to
|
|
// retrieve the performance data. If 0, performance data is collected from a real-time data source.
|
|
// dwUserData is a user-defined value to associate with this query. To retrieve the user data later,
|
|
// call PdhGetCounterInfo and access dwQueryUserData of the PdhCounterInfo structure. phQuery is
|
|
// the handle to the query, and must be used in subsequent calls. This function returns a PDH_
|
|
// constant error code, or ErrorSuccess if the call succeeded.
|
|
func PdhOpenQuery(szDataSource uintptr, dwUserData uintptr, phQuery *pdhQueryHandle) uint32 {
|
|
ret, _, _ := pdhOpenQuery.Call(
|
|
szDataSource,
|
|
dwUserData,
|
|
uintptr(unsafe.Pointer(phQuery)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhExpandWildCardPath examines the specified computer or log file and returns those counter paths that match the given counter path
|
|
// which contains wildcard characters. The general counter path format is as follows:
|
|
//
|
|
// \\computer\object(parent/instance#index)\counter
|
|
//
|
|
// The parent, instance, index, and counter components of the counter path may contain either a valid name or a wildcard character.
|
|
// The computer, parent, instance, and index components are not necessary for all counters.
|
|
//
|
|
// The following is a list of the possible formats:
|
|
//
|
|
// \\computer\object(parent/instance#index)\counter
|
|
// \\computer\object(parent/instance)\counter
|
|
// \\computer\object(instance#index)\counter
|
|
// \\computer\object(instance)\counter
|
|
// \\computer\object\counter
|
|
// \object(parent/instance#index)\counter
|
|
// \object(parent/instance)\counter
|
|
// \object(instance#index)\counter
|
|
// \object(instance)\counter
|
|
// \object\counter
|
|
// Use an asterisk (*) as the wildcard character, for example, \object(*)\counter.
|
|
//
|
|
// If a wildcard character is specified in the parent name, all instances of the specified object
|
|
// that match the specified instance and counter fields will be returned.
|
|
// For example, \object(*/instance)\counter.
|
|
//
|
|
// If a wildcard character is specified in the instance name, all instances of the specified object and parent object will be returned if all instance names
|
|
// corresponding to the specified index match the wildcard character. For example, \object(parent/*)\counter.
|
|
// If the object does not contain an instance, an error occurs.
|
|
//
|
|
// If a wildcard character is specified in the counter name, all counters of the specified object are returned.
|
|
//
|
|
// Partial counter path string matches (for example, "pro*") are supported.
|
|
func PdhExpandWildCardPath(szWildCardPath string, mszExpandedPathList *uint16, pcchPathListLength *uint32) uint32 {
|
|
ptxt, _ := windows.UTF16PtrFromString(szWildCardPath)
|
|
flags := uint32(0) // expand instances and counters
|
|
ret, _, _ := pdhExpandWildCardPathW.Call(
|
|
0, // search counters on local computer
|
|
uintptr(unsafe.Pointer(ptxt)),
|
|
uintptr(unsafe.Pointer(mszExpandedPathList)),
|
|
uintptr(unsafe.Pointer(pcchPathListLength)),
|
|
uintptr(unsafe.Pointer(&flags)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhValidatePath validates a path. Will return ErrorSuccess when ok, or PdhCstatusBadCountername when the path is erroneous.
|
|
func PdhValidatePath(path string) uint32 {
|
|
ptxt, _ := windows.UTF16PtrFromString(path)
|
|
ret, _, _ := pdhValidatePathW.Call(uintptr(unsafe.Pointer(ptxt)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
func PdhFormatError(msgID uint32) string {
|
|
var flags uint32 = windows.FORMAT_MESSAGE_FROM_HMODULE | windows.FORMAT_MESSAGE_ARGUMENT_ARRAY | windows.FORMAT_MESSAGE_IGNORE_INSERTS
|
|
|
|
buf := make([]uint16, 300)
|
|
_, err := windows.FormatMessage(flags, libPdhDll.Handle(), msgID, 0, buf, nil)
|
|
|
|
if err == nil {
|
|
return windows.UTF16PtrToString(&buf[0])
|
|
}
|
|
|
|
return fmt.Sprintf("(pdhErr=%d) %s", msgID, err.Error())
|
|
}
|
|
|
|
// PdhGetCounterInfo retrieves information about a counter, such as data size, counter type, path, and user-supplied data values
|
|
// hCounter [in]
|
|
// Handle of the counter from which you want to retrieve information. The PdhAddCounter function returns this handle.
|
|
//
|
|
// bRetrieveExplainText [in]
|
|
// Determines whether explain text is retrieved. If you set this parameter to TRUE, the explain text for the counter is retrieved.
|
|
// If you set this parameter to FALSE, the field in the returned buffer is NULL.
|
|
//
|
|
// pdwBufferSize [in, out]
|
|
// Size of the lpBuffer buffer, in bytes. If zero on input, the function returns PdhMoreData 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.
|
|
//
|
|
// lpBuffer [out]
|
|
// Caller-allocated buffer that receives a PdhCounterInfo structure.
|
|
// The structure is variable-length, because the string data is appended to the end of the fixed-format portion of the structure.
|
|
// This is done so that all data is returned in a single buffer allocated by the caller. Set to NULL if pdwBufferSize is zero.
|
|
func PdhGetCounterInfo(hCounter pdhCounterHandle, bRetrieveExplainText int, pdwBufferSize *uint32, lpBuffer *byte) uint32 {
|
|
ret, _, _ := pdhGetCounterInfoW.Call(
|
|
uintptr(hCounter),
|
|
uintptr(bRetrieveExplainText),
|
|
uintptr(unsafe.Pointer(pdwBufferSize)),
|
|
uintptr(unsafe.Pointer(lpBuffer)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhGetRawCounterValue returns the current raw value of the counter.
|
|
// If the specified counter instance does not exist, this function will return ErrorSuccess
|
|
// and the CStatus member of the PdhRawCounter structure will contain PdhCstatusNoInstance.
|
|
//
|
|
// hCounter [in]
|
|
// Handle of the counter from which to retrieve the current raw value. The PdhAddCounter function returns this handle.
|
|
//
|
|
// lpdwType [out]
|
|
// Receives the counter type. For a list of counter types, see the Counter Types section of the Windows Server 2003 Deployment Kit.
|
|
// This parameter is optional.
|
|
//
|
|
// pValue [out]
|
|
// A PdhRawCounter structure that receives the counter value.
|
|
func PdhGetRawCounterValue(hCounter pdhCounterHandle, lpdwType *uint32, pValue *PdhRawCounter) uint32 {
|
|
ret, _, _ := pdhGetRawCounterValue.Call(
|
|
uintptr(hCounter),
|
|
uintptr(unsafe.Pointer(lpdwType)),
|
|
uintptr(unsafe.Pointer(pValue)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhGetRawCounterArray returns an array of raw values from the specified counter. Use this function when you want to retrieve the raw counter values
|
|
// of a counter that contains a wildcard character for the instance name.
|
|
// hCounter
|
|
// Handle of the counter for whose current raw instance values you want to retrieve. The PdhAddCounter function returns this handle.
|
|
//
|
|
// lpdwBufferSize
|
|
// Size of the ItemBuffer buffer, in bytes. If zero on input, the function returns PdhMoreData 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.
|
|
//
|
|
// lpdwItemCount
|
|
// Number of raw counter values in the ItemBuffer buffer.
|
|
//
|
|
// ItemBuffer
|
|
// Caller-allocated buffer that receives the array of PdhRawCounterItem structures; the structures contain the raw instance counter values.
|
|
// Set to NULL if lpdwBufferSize is zero.
|
|
func PdhGetRawCounterArray(hCounter pdhCounterHandle, lpdwBufferSize *uint32, lpdwBufferCount *uint32, itemBuffer *byte) uint32 {
|
|
ret, _, _ := pdhGetRawCounterArrayW.Call(
|
|
uintptr(hCounter),
|
|
uintptr(unsafe.Pointer(lpdwBufferSize)),
|
|
uintptr(unsafe.Pointer(lpdwBufferCount)),
|
|
uintptr(unsafe.Pointer(itemBuffer)))
|
|
|
|
return uint32(ret)
|
|
}
|
|
|
|
// PdhGetCounterTimeBase returns the time base of the specified counter.
|
|
// hCounter
|
|
// Handle of the counter for whose current raw instance values you want to retrieve. The PdhAddCounter function returns this handle.
|
|
//
|
|
// lpdwItemCount
|
|
// Time base that specifies the number of performance values a counter samples per second.
|
|
func PdhGetCounterTimeBase(hCounter pdhCounterHandle, pTimeBase *float64) uint32 {
|
|
ret, _, _ := pdhPdhGetCounterTimeBase.Call(
|
|
uintptr(hCounter),
|
|
uintptr(unsafe.Pointer(pTimeBase)))
|
|
|
|
return uint32(ret)
|
|
}
|