PdhGetRawCounterArrayA

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

DWORD PdhGetRawCounterArrayA(
    PDH_HCOUNTER hCounter,
    DWORD* lpdwBufferSize,
    DWORD* lpdwItemCount,
    PDH_RAW_COUNTER_ITEM_A* ItemBuffer   // optional
);

<DllImport("pdh.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PdhGetRawCounterArrayA(
    hCounter As IntPtr,   ' PDH_HCOUNTER
    ByRef lpdwBufferSize As UInteger,   ' DWORD* in/out
    <Out> ByRef lpdwItemCount As UInteger,   ' DWORD* out
    ItemBuffer As IntPtr   ' PDH_RAW_COUNTER_ITEM_A* optional, out
) As UInteger
End Function

' hCounter : PDH_HCOUNTER
' lpdwBufferSize : DWORD* in/out
' lpdwItemCount : DWORD* out
' ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, out
Declare PtrSafe Function PdhGetRawCounterArrayA Lib "pdh" ( _
    ByVal hCounter As LongPtr, _
    ByRef lpdwBufferSize As Long, _
    ByRef lpdwItemCount As Long, _
    ByVal ItemBuffer As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PdhGetRawCounterArrayA = ctypes.windll.pdh.PdhGetRawCounterArrayA
PdhGetRawCounterArrayA.restype = wintypes.DWORD
PdhGetRawCounterArrayA.argtypes = [
    wintypes.HANDLE,  # hCounter : PDH_HCOUNTER
    ctypes.POINTER(wintypes.DWORD),  # lpdwBufferSize : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # lpdwItemCount : DWORD* out
    ctypes.c_void_p,  # ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhGetRawCounterArrayA = Fiddle::Function.new(
  lib['PdhGetRawCounterArrayA'],
  [
    Fiddle::TYPE_VOIDP,  # hCounter : PDH_HCOUNTER
    Fiddle::TYPE_VOIDP,  # lpdwBufferSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # lpdwItemCount : DWORD* out
    Fiddle::TYPE_VOIDP,  # ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhGetRawCounterArrayA(
        hCounter: *mut core::ffi::c_void,  // PDH_HCOUNTER
        lpdwBufferSize: *mut u32,  // DWORD* in/out
        lpdwItemCount: *mut u32,  // DWORD* out
        ItemBuffer: *mut PDH_RAW_COUNTER_ITEM_A  // PDH_RAW_COUNTER_ITEM_A* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Ansi)]
public static extern uint PdhGetRawCounterArrayA(IntPtr hCounter, ref uint lpdwBufferSize, out uint lpdwItemCount, IntPtr ItemBuffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhGetRawCounterArrayA' -Namespace Win32 -PassThru
# $api::PdhGetRawCounterArrayA(hCounter, lpdwBufferSize, lpdwItemCount, ItemBuffer)

#uselib "pdh.dll"
#func global PdhGetRawCounterArrayA "PdhGetRawCounterArrayA" sptr, sptr, sptr, sptr
; PdhGetRawCounterArrayA hCounter, varptr(lpdwBufferSize), varptr(lpdwItemCount), varptr(ItemBuffer)   ; 戻り値は stat
; hCounter : PDH_HCOUNTER -> "sptr"
; lpdwBufferSize : DWORD* in/out -> "sptr"
; lpdwItemCount : DWORD* out -> "sptr"
; ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, out -> "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。

#uselib "pdh.dll"
#cfunc global PdhGetRawCounterArrayA "PdhGetRawCounterArrayA" sptr, var, var, var
; res = PdhGetRawCounterArrayA(hCounter, lpdwBufferSize, lpdwItemCount, ItemBuffer)
; hCounter : PDH_HCOUNTER -> "sptr"
; lpdwBufferSize : DWORD* in/out -> "var"
; lpdwItemCount : DWORD* out -> "var"
; ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, 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 PdhGetRawCounterArrayA(PDH_HCOUNTER hCounter, DWORD* lpdwBufferSize, DWORD* lpdwItemCount, PDH_RAW_COUNTER_ITEM_A* ItemBuffer)
#uselib "pdh.dll"
#cfunc global PdhGetRawCounterArrayA "PdhGetRawCounterArrayA" intptr, var, var, var
; res = PdhGetRawCounterArrayA(hCounter, lpdwBufferSize, lpdwItemCount, ItemBuffer)
; hCounter : PDH_HCOUNTER -> "intptr"
; lpdwBufferSize : DWORD* in/out -> "var"
; lpdwItemCount : DWORD* out -> "var"
; ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, 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。

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

var (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhGetRawCounterArrayA = pdh.NewProc("PdhGetRawCounterArrayA")
)

// hCounter (PDH_HCOUNTER), lpdwBufferSize (DWORD* in/out), lpdwItemCount (DWORD* out), ItemBuffer (PDH_RAW_COUNTER_ITEM_A* optional, out)
r1, _, err := procPdhGetRawCounterArrayA.Call(
	uintptr(hCounter),
	uintptr(lpdwBufferSize),
	uintptr(lpdwItemCount),
	uintptr(ItemBuffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhGetRawCounterArrayA(
  hCounter: THandle;   // PDH_HCOUNTER
  lpdwBufferSize: Pointer;   // DWORD* in/out
  lpdwItemCount: Pointer;   // DWORD* out
  ItemBuffer: Pointer   // PDH_RAW_COUNTER_ITEM_A* optional, out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhGetRawCounterArrayA';

result := DllCall("pdh\PdhGetRawCounterArrayA"
    , "Ptr", hCounter   ; PDH_HCOUNTER
    , "Ptr", lpdwBufferSize   ; DWORD* in/out
    , "Ptr", lpdwItemCount   ; DWORD* out
    , "Ptr", ItemBuffer   ; PDH_RAW_COUNTER_ITEM_A* optional, out
    , "UInt")   ; return: DWORD

●PdhGetRawCounterArrayA(hCounter, lpdwBufferSize, lpdwItemCount, ItemBuffer) = DLL("pdh.dll", "dword PdhGetRawCounterArrayA(void*, void*, void*, void*)")
# 呼び出し: PdhGetRawCounterArrayA(hCounter, lpdwBufferSize, lpdwItemCount, ItemBuffer)
# hCounter : PDH_HCOUNTER -> "void*"
# lpdwBufferSize : DWORD* in/out -> "void*"
# lpdwItemCount : DWORD* out -> "void*"
# ItemBuffer : PDH_RAW_COUNTER_ITEM_A* optional, 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)。