WHvGetPartitionCounters

// WinHvPlatform.dll
#include <windows.h>

HRESULT WHvGetPartitionCounters(
    WHV_PARTITION_HANDLE Partition,
    WHV_PARTITION_COUNTER_SET CounterSet,
    void* Buffer,
    DWORD BufferSizeInBytes,
    DWORD* BytesWritten   // optional
);

<DllImport("WinHvPlatform.dll", ExactSpelling:=True)>
Public Shared Function WHvGetPartitionCounters(
    Partition As IntPtr,   ' WHV_PARTITION_HANDLE
    CounterSet As Integer,   ' WHV_PARTITION_COUNTER_SET
    Buffer As IntPtr,   ' void* out
    BufferSizeInBytes As UInteger,   ' DWORD
    BytesWritten As IntPtr   ' DWORD* optional, out
) As Integer
End Function

' Partition : WHV_PARTITION_HANDLE
' CounterSet : WHV_PARTITION_COUNTER_SET
' Buffer : void* out
' BufferSizeInBytes : DWORD
' BytesWritten : DWORD* optional, out
Declare PtrSafe Function WHvGetPartitionCounters Lib "winhvplatform" ( _
    ByVal Partition As LongPtr, _
    ByVal CounterSet As Long, _
    ByVal Buffer As LongPtr, _
    ByVal BufferSizeInBytes As Long, _
    ByVal BytesWritten 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

WHvGetPartitionCounters = ctypes.windll.winhvplatform.WHvGetPartitionCounters
WHvGetPartitionCounters.restype = ctypes.c_int
WHvGetPartitionCounters.argtypes = [
    ctypes.c_ssize_t,  # Partition : WHV_PARTITION_HANDLE
    ctypes.c_int,  # CounterSet : WHV_PARTITION_COUNTER_SET
    ctypes.POINTER(None),  # Buffer : void* out
    wintypes.DWORD,  # BufferSizeInBytes : DWORD
    ctypes.POINTER(wintypes.DWORD),  # BytesWritten : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinHvPlatform.dll')
WHvGetPartitionCounters = Fiddle::Function.new(
  lib['WHvGetPartitionCounters'],
  [
    Fiddle::TYPE_INTPTR_T,  # Partition : WHV_PARTITION_HANDLE
    Fiddle::TYPE_INT,  # CounterSet : WHV_PARTITION_COUNTER_SET
    Fiddle::TYPE_VOIDP,  # Buffer : void* out
    -Fiddle::TYPE_INT,  # BufferSizeInBytes : DWORD
    Fiddle::TYPE_VOIDP,  # BytesWritten : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winhvplatform")]
extern "system" {
    fn WHvGetPartitionCounters(
        Partition: isize,  // WHV_PARTITION_HANDLE
        CounterSet: i32,  // WHV_PARTITION_COUNTER_SET
        Buffer: *mut (),  // void* out
        BufferSizeInBytes: u32,  // DWORD
        BytesWritten: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinHvPlatform.dll")]
public static extern int WHvGetPartitionCounters(IntPtr Partition, int CounterSet, IntPtr Buffer, uint BufferSizeInBytes, IntPtr BytesWritten);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinHvPlatform_WHvGetPartitionCounters' -Namespace Win32 -PassThru
# $api::WHvGetPartitionCounters(Partition, CounterSet, Buffer, BufferSizeInBytes, BytesWritten)

#uselib "WinHvPlatform.dll"
#func global WHvGetPartitionCounters "WHvGetPartitionCounters" sptr, sptr, sptr, sptr, sptr
; WHvGetPartitionCounters Partition, CounterSet, Buffer, BufferSizeInBytes, varptr(BytesWritten)   ; 戻り値は stat
; Partition : WHV_PARTITION_HANDLE -> "sptr"
; CounterSet : WHV_PARTITION_COUNTER_SET -> "sptr"
; Buffer : void* out -> "sptr"
; BufferSizeInBytes : DWORD -> "sptr"
; BytesWritten : DWORD* 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 "WinHvPlatform.dll"
#cfunc global WHvGetPartitionCounters "WHvGetPartitionCounters" sptr, int, sptr, int, var
; res = WHvGetPartitionCounters(Partition, CounterSet, Buffer, BufferSizeInBytes, BytesWritten)
; Partition : WHV_PARTITION_HANDLE -> "sptr"
; CounterSet : WHV_PARTITION_COUNTER_SET -> "int"
; Buffer : void* out -> "sptr"
; BufferSizeInBytes : DWORD -> "int"
; BytesWritten : DWORD* 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。

; HRESULT WHvGetPartitionCounters(WHV_PARTITION_HANDLE Partition, WHV_PARTITION_COUNTER_SET CounterSet, void* Buffer, DWORD BufferSizeInBytes, DWORD* BytesWritten)
#uselib "WinHvPlatform.dll"
#cfunc global WHvGetPartitionCounters "WHvGetPartitionCounters" intptr, int, intptr, int, var
; res = WHvGetPartitionCounters(Partition, CounterSet, Buffer, BufferSizeInBytes, BytesWritten)
; Partition : WHV_PARTITION_HANDLE -> "intptr"
; CounterSet : WHV_PARTITION_COUNTER_SET -> "int"
; Buffer : void* out -> "intptr"
; BufferSizeInBytes : DWORD -> "int"
; BytesWritten : DWORD* 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 (
	winhvplatform = windows.NewLazySystemDLL("WinHvPlatform.dll")
	procWHvGetPartitionCounters = winhvplatform.NewProc("WHvGetPartitionCounters")
)

// Partition (WHV_PARTITION_HANDLE), CounterSet (WHV_PARTITION_COUNTER_SET), Buffer (void* out), BufferSizeInBytes (DWORD), BytesWritten (DWORD* optional, out)
r1, _, err := procWHvGetPartitionCounters.Call(
	uintptr(Partition),
	uintptr(CounterSet),
	uintptr(Buffer),
	uintptr(BufferSizeInBytes),
	uintptr(BytesWritten),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WHvGetPartitionCounters(
  Partition: NativeInt;   // WHV_PARTITION_HANDLE
  CounterSet: Integer;   // WHV_PARTITION_COUNTER_SET
  Buffer: Pointer;   // void* out
  BufferSizeInBytes: DWORD;   // DWORD
  BytesWritten: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'WinHvPlatform.dll' name 'WHvGetPartitionCounters';

result := DllCall("WinHvPlatform\WHvGetPartitionCounters"
    , "Ptr", Partition   ; WHV_PARTITION_HANDLE
    , "Int", CounterSet   ; WHV_PARTITION_COUNTER_SET
    , "Ptr", Buffer   ; void* out
    , "UInt", BufferSizeInBytes   ; DWORD
    , "Ptr", BytesWritten   ; DWORD* optional, out
    , "Int")   ; return: HRESULT

●WHvGetPartitionCounters(Partition, CounterSet, Buffer, BufferSizeInBytes, BytesWritten) = DLL("WinHvPlatform.dll", "int WHvGetPartitionCounters(int, int, void*, dword, void*)")
# 呼び出し: WHvGetPartitionCounters(Partition, CounterSet, Buffer, BufferSizeInBytes, BytesWritten)
# Partition : WHV_PARTITION_HANDLE -> "int"
# CounterSet : WHV_PARTITION_COUNTER_SET -> "int"
# Buffer : void* out -> "void*"
# BufferSizeInBytes : DWORD -> "dword"
# BytesWritten : DWORD* 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)。