ホーム › System.Performance › PdhGetDefaultPerfCounterW

PdhGetDefaultPerfCounterW

関数

オブジェクトの既定カウンター名を取得する。

DLLpdh.dll文字セットUnicode (-W)呼出規約winapi対応OSWindows XP 以降

シグネチャ

// pdh.dll  (Unicode / -W)
#include <windows.h>

DWORD PdhGetDefaultPerfCounterW(
    LPCWSTR szDataSource,   // optional
    LPCWSTR szMachineName,   // optional
    LPCWSTR szObjectName,
    LPWSTR szDefaultCounterName,   // optional
    DWORD* pcchBufferSize
);

パラメーター

名前	型	方向
szDataSource	LPCWSTR	inoptional
szMachineName	LPCWSTR	inoptional
szObjectName	LPCWSTR	in
szDefaultCounterName	LPWSTR	outoptional
pcchBufferSize	DWORD*	inout

戻り値の型: DWORD

各言語での呼び出し定義

// pdh.dll  (Unicode / -W)
#include <windows.h>

DWORD PdhGetDefaultPerfCounterW(
    LPCWSTR szDataSource,   // optional
    LPCWSTR szMachineName,   // optional
    LPCWSTR szObjectName,
    LPWSTR szDefaultCounterName,   // optional
    DWORD* pcchBufferSize
);

[DllImport("pdh.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern uint PdhGetDefaultPerfCounterW(
    [MarshalAs(UnmanagedType.LPWStr)] string szDataSource,   // LPCWSTR optional
    [MarshalAs(UnmanagedType.LPWStr)] string szMachineName,   // LPCWSTR optional
    [MarshalAs(UnmanagedType.LPWStr)] string szObjectName,   // LPCWSTR
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder szDefaultCounterName,   // LPWSTR optional, out
    ref uint pcchBufferSize   // DWORD* in/out
);

<DllImport("pdh.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function PdhGetDefaultPerfCounterW(
    <MarshalAs(UnmanagedType.LPWStr)> szDataSource As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> szMachineName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> szObjectName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> szDefaultCounterName As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchBufferSize As UInteger   ' DWORD* in/out
) As UInteger
End Function

' szDataSource : LPCWSTR optional
' szMachineName : LPCWSTR optional
' szObjectName : LPCWSTR
' szDefaultCounterName : LPWSTR optional, out
' pcchBufferSize : DWORD* in/out
Declare PtrSafe Function PdhGetDefaultPerfCounterW Lib "pdh" ( _
    ByVal szDataSource As LongPtr, _
    ByVal szMachineName As LongPtr, _
    ByVal szObjectName As LongPtr, _
    ByVal szDefaultCounterName As LongPtr, _
    ByRef pcchBufferSize As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PdhGetDefaultPerfCounterW = ctypes.windll.pdh.PdhGetDefaultPerfCounterW
PdhGetDefaultPerfCounterW.restype = wintypes.DWORD
PdhGetDefaultPerfCounterW.argtypes = [
    wintypes.LPCWSTR,  # szDataSource : LPCWSTR optional
    wintypes.LPCWSTR,  # szMachineName : LPCWSTR optional
    wintypes.LPCWSTR,  # szObjectName : LPCWSTR
    wintypes.LPWSTR,  # szDefaultCounterName : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBufferSize : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhGetDefaultPerfCounterW = Fiddle::Function.new(
  lib['PdhGetDefaultPerfCounterW'],
  [
    Fiddle::TYPE_VOIDP,  # szDataSource : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # szMachineName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # szObjectName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # szDefaultCounterName : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchBufferSize : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "pdh")]
extern "system" {
    fn PdhGetDefaultPerfCounterW(
        szDataSource: *const u16,  // LPCWSTR optional
        szMachineName: *const u16,  // LPCWSTR optional
        szObjectName: *const u16,  // LPCWSTR
        szDefaultCounterName: *mut u16,  // LPWSTR optional, out
        pcchBufferSize: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Unicode)]
public static extern uint PdhGetDefaultPerfCounterW([MarshalAs(UnmanagedType.LPWStr)] string szDataSource, [MarshalAs(UnmanagedType.LPWStr)] string szMachineName, [MarshalAs(UnmanagedType.LPWStr)] string szObjectName, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder szDefaultCounterName, ref uint pcchBufferSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhGetDefaultPerfCounterW' -Namespace Win32 -PassThru
# $api::PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, szDefaultCounterName, pcchBufferSize)

#uselib "pdh.dll"
#func global PdhGetDefaultPerfCounterW "PdhGetDefaultPerfCounterW" wptr, wptr, wptr, wptr, wptr
; PdhGetDefaultPerfCounterW szDataSource, szMachineName, szObjectName, varptr(szDefaultCounterName), varptr(pcchBufferSize)   ; 戻り値は stat
; szDataSource : LPCWSTR optional -> "wptr"
; szMachineName : LPCWSTR optional -> "wptr"
; szObjectName : LPCWSTR -> "wptr"
; szDefaultCounterName : LPWSTR optional, out -> "wptr"
; pcchBufferSize : DWORD* in/out -> "wptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

出力引数:

#uselib "pdh.dll"
#cfunc global PdhGetDefaultPerfCounterW "PdhGetDefaultPerfCounterW" wstr, wstr, wstr, var, var
; res = PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, szDefaultCounterName, pcchBufferSize)
; szDataSource : LPCWSTR optional -> "wstr"
; szMachineName : LPCWSTR optional -> "wstr"
; szObjectName : LPCWSTR -> "wstr"
; szDefaultCounterName : LPWSTR optional, out -> "var"
; pcchBufferSize : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "pdh.dll"
#cfunc global PdhGetDefaultPerfCounterW "PdhGetDefaultPerfCounterW" wstr, wstr, wstr, sptr, sptr
; res = PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, varptr(szDefaultCounterName), varptr(pcchBufferSize))
; szDataSource : LPCWSTR optional -> "wstr"
; szMachineName : LPCWSTR optional -> "wstr"
; szObjectName : LPCWSTR -> "wstr"
; szDefaultCounterName : LPWSTR optional, out -> "sptr"
; pcchBufferSize : DWORD* in/out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; DWORD PdhGetDefaultPerfCounterW(LPCWSTR szDataSource, LPCWSTR szMachineName, LPCWSTR szObjectName, LPWSTR szDefaultCounterName, DWORD* pcchBufferSize)
#uselib "pdh.dll"
#cfunc global PdhGetDefaultPerfCounterW "PdhGetDefaultPerfCounterW" wstr, wstr, wstr, var, var
; res = PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, szDefaultCounterName, pcchBufferSize)
; szDataSource : LPCWSTR optional -> "wstr"
; szMachineName : LPCWSTR optional -> "wstr"
; szObjectName : LPCWSTR -> "wstr"
; szDefaultCounterName : LPWSTR optional, out -> "var"
; pcchBufferSize : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; DWORD PdhGetDefaultPerfCounterW(LPCWSTR szDataSource, LPCWSTR szMachineName, LPCWSTR szObjectName, LPWSTR szDefaultCounterName, DWORD* pcchBufferSize)
#uselib "pdh.dll"
#cfunc global PdhGetDefaultPerfCounterW "PdhGetDefaultPerfCounterW" wstr, wstr, wstr, intptr, intptr
; res = PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, varptr(szDefaultCounterName), varptr(pcchBufferSize))
; szDataSource : LPCWSTR optional -> "wstr"
; szMachineName : LPCWSTR optional -> "wstr"
; szObjectName : LPCWSTR -> "wstr"
; szDefaultCounterName : LPWSTR optional, out -> "intptr"
; pcchBufferSize : DWORD* in/out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhGetDefaultPerfCounterW = pdh.NewProc("PdhGetDefaultPerfCounterW")
)

// szDataSource (LPCWSTR optional), szMachineName (LPCWSTR optional), szObjectName (LPCWSTR), szDefaultCounterName (LPWSTR optional, out), pcchBufferSize (DWORD* in/out)
r1, _, err := procPdhGetDefaultPerfCounterW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szDataSource))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szMachineName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szObjectName))),
	uintptr(szDefaultCounterName),
	uintptr(pcchBufferSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhGetDefaultPerfCounterW(
  szDataSource: PWideChar;   // LPCWSTR optional
  szMachineName: PWideChar;   // LPCWSTR optional
  szObjectName: PWideChar;   // LPCWSTR
  szDefaultCounterName: PWideChar;   // LPWSTR optional, out
  pcchBufferSize: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhGetDefaultPerfCounterW';

result := DllCall("pdh\PdhGetDefaultPerfCounterW"
    , "WStr", szDataSource   ; LPCWSTR optional
    , "WStr", szMachineName   ; LPCWSTR optional
    , "WStr", szObjectName   ; LPCWSTR
    , "Ptr", szDefaultCounterName   ; LPWSTR optional, out
    , "Ptr", pcchBufferSize   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, szDefaultCounterName, pcchBufferSize) = DLL("pdh.dll", "dword PdhGetDefaultPerfCounterW(char*, char*, char*, char*, void*)")
# 呼び出し: PdhGetDefaultPerfCounterW(szDataSource, szMachineName, szObjectName, szDefaultCounterName, pcchBufferSize)
# szDataSource : LPCWSTR optional -> "char*"
# szMachineName : LPCWSTR optional -> "char*"
# szObjectName : LPCWSTR -> "char*"
# szDefaultCounterName : LPWSTR optional, out -> "char*"
# pcchBufferSize : DWORD* in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。