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PdhEnumObjectItemsA

関数

オブジェクトのカウンターとインスタンスを列挙する(ANSI版)。

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

シグネチャ

// pdh.dll  (ANSI / -A)
#include <windows.h>

DWORD PdhEnumObjectItemsA(
    LPCSTR szDataSource,   // optional
    LPCSTR szMachineName,   // optional
    LPCSTR szObjectName,
    LPSTR mszCounterList,   // optional
    DWORD* pcchCounterListLength,
    LPSTR mszInstanceList,   // optional
    DWORD* pcchInstanceListLength,
    PERF_DETAIL dwDetailLevel,
    DWORD dwFlags
);

パラメーター

名前	型	方向
szDataSource	LPCSTR	inoptional
szMachineName	LPCSTR	inoptional
szObjectName	LPCSTR	in
mszCounterList	LPSTR	outoptional
pcchCounterListLength	DWORD*	inout
mszInstanceList	LPSTR	outoptional
pcchInstanceListLength	DWORD*	inout
dwDetailLevel	PERF_DETAIL	in
dwFlags	DWORD	in

戻り値の型: DWORD

各言語での呼び出し定義

// pdh.dll  (ANSI / -A)
#include <windows.h>

DWORD PdhEnumObjectItemsA(
    LPCSTR szDataSource,   // optional
    LPCSTR szMachineName,   // optional
    LPCSTR szObjectName,
    LPSTR mszCounterList,   // optional
    DWORD* pcchCounterListLength,
    LPSTR mszInstanceList,   // optional
    DWORD* pcchInstanceListLength,
    PERF_DETAIL dwDetailLevel,
    DWORD dwFlags
);

[DllImport("pdh.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern uint PdhEnumObjectItemsA(
    [MarshalAs(UnmanagedType.LPStr)] string szDataSource,   // LPCSTR optional
    [MarshalAs(UnmanagedType.LPStr)] string szMachineName,   // LPCSTR optional
    [MarshalAs(UnmanagedType.LPStr)] string szObjectName,   // LPCSTR
    [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder mszCounterList,   // LPSTR optional, out
    ref uint pcchCounterListLength,   // DWORD* in/out
    [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder mszInstanceList,   // LPSTR optional, out
    ref uint pcchInstanceListLength,   // DWORD* in/out
    uint dwDetailLevel,   // PERF_DETAIL
    uint dwFlags   // DWORD
);

<DllImport("pdh.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PdhEnumObjectItemsA(
    <MarshalAs(UnmanagedType.LPStr)> szDataSource As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> szMachineName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> szObjectName As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> mszCounterList As System.Text.StringBuilder,   ' LPSTR optional, out
    ByRef pcchCounterListLength As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPStr)> mszInstanceList As System.Text.StringBuilder,   ' LPSTR optional, out
    ByRef pcchInstanceListLength As UInteger,   ' DWORD* in/out
    dwDetailLevel As UInteger,   ' PERF_DETAIL
    dwFlags As UInteger   ' DWORD
) As UInteger
End Function

' szDataSource : LPCSTR optional
' szMachineName : LPCSTR optional
' szObjectName : LPCSTR
' mszCounterList : LPSTR optional, out
' pcchCounterListLength : DWORD* in/out
' mszInstanceList : LPSTR optional, out
' pcchInstanceListLength : DWORD* in/out
' dwDetailLevel : PERF_DETAIL
' dwFlags : DWORD
Declare PtrSafe Function PdhEnumObjectItemsA Lib "pdh" ( _
    ByVal szDataSource As String, _
    ByVal szMachineName As String, _
    ByVal szObjectName As String, _
    ByVal mszCounterList As String, _
    ByRef pcchCounterListLength As Long, _
    ByVal mszInstanceList As String, _
    ByRef pcchInstanceListLength As Long, _
    ByVal dwDetailLevel As Long, _
    ByVal dwFlags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PdhEnumObjectItemsA = ctypes.windll.pdh.PdhEnumObjectItemsA
PdhEnumObjectItemsA.restype = wintypes.DWORD
PdhEnumObjectItemsA.argtypes = [
    wintypes.LPCSTR,  # szDataSource : LPCSTR optional
    wintypes.LPCSTR,  # szMachineName : LPCSTR optional
    wintypes.LPCSTR,  # szObjectName : LPCSTR
    wintypes.LPSTR,  # mszCounterList : LPSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchCounterListLength : DWORD* in/out
    wintypes.LPSTR,  # mszInstanceList : LPSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchInstanceListLength : DWORD* in/out
    wintypes.DWORD,  # dwDetailLevel : PERF_DETAIL
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhEnumObjectItemsA = Fiddle::Function.new(
  lib['PdhEnumObjectItemsA'],
  [
    Fiddle::TYPE_VOIDP,  # szDataSource : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # szMachineName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # szObjectName : LPCSTR
    Fiddle::TYPE_VOIDP,  # mszCounterList : LPSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchCounterListLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # mszInstanceList : LPSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchInstanceListLength : DWORD* in/out
    -Fiddle::TYPE_INT,  # dwDetailLevel : PERF_DETAIL
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhEnumObjectItemsA(
        szDataSource: *const u8,  // LPCSTR optional
        szMachineName: *const u8,  // LPCSTR optional
        szObjectName: *const u8,  // LPCSTR
        mszCounterList: *mut u8,  // LPSTR optional, out
        pcchCounterListLength: *mut u32,  // DWORD* in/out
        mszInstanceList: *mut u8,  // LPSTR optional, out
        pcchInstanceListLength: *mut u32,  // DWORD* in/out
        dwDetailLevel: u32,  // PERF_DETAIL
        dwFlags: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Ansi)]
public static extern uint PdhEnumObjectItemsA([MarshalAs(UnmanagedType.LPStr)] string szDataSource, [MarshalAs(UnmanagedType.LPStr)] string szMachineName, [MarshalAs(UnmanagedType.LPStr)] string szObjectName, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder mszCounterList, ref uint pcchCounterListLength, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder mszInstanceList, ref uint pcchInstanceListLength, uint dwDetailLevel, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhEnumObjectItemsA' -Namespace Win32 -PassThru
# $api::PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags)

#uselib "pdh.dll"
#func global PdhEnumObjectItemsA "PdhEnumObjectItemsA" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; PdhEnumObjectItemsA szDataSource, szMachineName, szObjectName, varptr(mszCounterList), varptr(pcchCounterListLength), varptr(mszInstanceList), varptr(pcchInstanceListLength), dwDetailLevel, dwFlags   ; 戻り値は stat
; szDataSource : LPCSTR optional -> "sptr"
; szMachineName : LPCSTR optional -> "sptr"
; szObjectName : LPCSTR -> "sptr"
; mszCounterList : LPSTR optional, out -> "sptr"
; pcchCounterListLength : DWORD* in/out -> "sptr"
; mszInstanceList : LPSTR optional, out -> "sptr"
; pcchInstanceListLength : DWORD* in/out -> "sptr"
; dwDetailLevel : PERF_DETAIL -> "sptr"
; dwFlags : DWORD -> "sptr"
; ※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 PdhEnumObjectItemsA "PdhEnumObjectItemsA" str, str, str, var, var, var, var, int, int
; res = PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags)
; szDataSource : LPCSTR optional -> "str"
; szMachineName : LPCSTR optional -> "str"
; szObjectName : LPCSTR -> "str"
; mszCounterList : LPSTR optional, out -> "var"
; pcchCounterListLength : DWORD* in/out -> "var"
; mszInstanceList : LPSTR optional, out -> "var"
; pcchInstanceListLength : DWORD* in/out -> "var"
; dwDetailLevel : PERF_DETAIL -> "int"
; dwFlags : DWORD -> "int"
; ※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 PdhEnumObjectItemsA "PdhEnumObjectItemsA" str, str, str, sptr, sptr, sptr, sptr, int, int
; res = PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, varptr(mszCounterList), varptr(pcchCounterListLength), varptr(mszInstanceList), varptr(pcchInstanceListLength), dwDetailLevel, dwFlags)
; szDataSource : LPCSTR optional -> "str"
; szMachineName : LPCSTR optional -> "str"
; szObjectName : LPCSTR -> "str"
; mszCounterList : LPSTR optional, out -> "sptr"
; pcchCounterListLength : DWORD* in/out -> "sptr"
; mszInstanceList : LPSTR optional, out -> "sptr"
; pcchInstanceListLength : DWORD* in/out -> "sptr"
; dwDetailLevel : PERF_DETAIL -> "int"
; dwFlags : DWORD -> "int"
; ※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 PdhEnumObjectItemsA(LPCSTR szDataSource, LPCSTR szMachineName, LPCSTR szObjectName, LPSTR mszCounterList, DWORD* pcchCounterListLength, LPSTR mszInstanceList, DWORD* pcchInstanceListLength, PERF_DETAIL dwDetailLevel, DWORD dwFlags)
#uselib "pdh.dll"
#cfunc global PdhEnumObjectItemsA "PdhEnumObjectItemsA" str, str, str, var, var, var, var, int, int
; res = PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags)
; szDataSource : LPCSTR optional -> "str"
; szMachineName : LPCSTR optional -> "str"
; szObjectName : LPCSTR -> "str"
; mszCounterList : LPSTR optional, out -> "var"
; pcchCounterListLength : DWORD* in/out -> "var"
; mszInstanceList : LPSTR optional, out -> "var"
; pcchInstanceListLength : DWORD* in/out -> "var"
; dwDetailLevel : PERF_DETAIL -> "int"
; dwFlags : DWORD -> "int"
; ※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 PdhEnumObjectItemsA(LPCSTR szDataSource, LPCSTR szMachineName, LPCSTR szObjectName, LPSTR mszCounterList, DWORD* pcchCounterListLength, LPSTR mszInstanceList, DWORD* pcchInstanceListLength, PERF_DETAIL dwDetailLevel, DWORD dwFlags)
#uselib "pdh.dll"
#cfunc global PdhEnumObjectItemsA "PdhEnumObjectItemsA" str, str, str, intptr, intptr, intptr, intptr, int, int
; res = PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, varptr(mszCounterList), varptr(pcchCounterListLength), varptr(mszInstanceList), varptr(pcchInstanceListLength), dwDetailLevel, dwFlags)
; szDataSource : LPCSTR optional -> "str"
; szMachineName : LPCSTR optional -> "str"
; szObjectName : LPCSTR -> "str"
; mszCounterList : LPSTR optional, out -> "intptr"
; pcchCounterListLength : DWORD* in/out -> "intptr"
; mszInstanceList : LPSTR optional, out -> "intptr"
; pcchInstanceListLength : DWORD* in/out -> "intptr"
; dwDetailLevel : PERF_DETAIL -> "int"
; dwFlags : DWORD -> "int"
; ※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")
	procPdhEnumObjectItemsA = pdh.NewProc("PdhEnumObjectItemsA")
)

// szDataSource (LPCSTR optional), szMachineName (LPCSTR optional), szObjectName (LPCSTR), mszCounterList (LPSTR optional, out), pcchCounterListLength (DWORD* in/out), mszInstanceList (LPSTR optional, out), pcchInstanceListLength (DWORD* in/out), dwDetailLevel (PERF_DETAIL), dwFlags (DWORD)
r1, _, err := procPdhEnumObjectItemsA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szDataSource))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szMachineName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szObjectName))),
	uintptr(mszCounterList),
	uintptr(pcchCounterListLength),
	uintptr(mszInstanceList),
	uintptr(pcchInstanceListLength),
	uintptr(dwDetailLevel),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhEnumObjectItemsA(
  szDataSource: PAnsiChar;   // LPCSTR optional
  szMachineName: PAnsiChar;   // LPCSTR optional
  szObjectName: PAnsiChar;   // LPCSTR
  mszCounterList: PAnsiChar;   // LPSTR optional, out
  pcchCounterListLength: Pointer;   // DWORD* in/out
  mszInstanceList: PAnsiChar;   // LPSTR optional, out
  pcchInstanceListLength: Pointer;   // DWORD* in/out
  dwDetailLevel: DWORD;   // PERF_DETAIL
  dwFlags: DWORD   // DWORD
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhEnumObjectItemsA';

result := DllCall("pdh\PdhEnumObjectItemsA"
    , "AStr", szDataSource   ; LPCSTR optional
    , "AStr", szMachineName   ; LPCSTR optional
    , "AStr", szObjectName   ; LPCSTR
    , "Ptr", mszCounterList   ; LPSTR optional, out
    , "Ptr", pcchCounterListLength   ; DWORD* in/out
    , "Ptr", mszInstanceList   ; LPSTR optional, out
    , "Ptr", pcchInstanceListLength   ; DWORD* in/out
    , "UInt", dwDetailLevel   ; PERF_DETAIL
    , "UInt", dwFlags   ; DWORD
    , "UInt")   ; return: DWORD

●PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags) = DLL("pdh.dll", "dword PdhEnumObjectItemsA(char*, char*, char*, char*, void*, char*, void*, dword, dword)")
# 呼び出し: PdhEnumObjectItemsA(szDataSource, szMachineName, szObjectName, mszCounterList, pcchCounterListLength, mszInstanceList, pcchInstanceListLength, dwDetailLevel, dwFlags)
# szDataSource : LPCSTR optional -> "char*"
# szMachineName : LPCSTR optional -> "char*"
# szObjectName : LPCSTR -> "char*"
# mszCounterList : LPSTR optional, out -> "char*"
# pcchCounterListLength : DWORD* in/out -> "void*"
# mszInstanceList : LPSTR optional, out -> "char*"
# pcchInstanceListLength : DWORD* in/out -> "void*"
# dwDetailLevel : PERF_DETAIL -> "dword"
# dwFlags : DWORD -> "dword"
# 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)。