SetThreadSelectedCpuSetMasks

// KERNEL32.dll
#include <windows.h>

BOOL SetThreadSelectedCpuSetMasks(
    HANDLE Thread,
    GROUP_AFFINITY* CpuSetMasks,   // optional
    WORD CpuSetMaskCount
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function SetThreadSelectedCpuSetMasks(
    Thread As IntPtr,   ' HANDLE
    CpuSetMasks As IntPtr,   ' GROUP_AFFINITY* optional
    CpuSetMaskCount As UShort   ' WORD
) As Boolean
End Function

' Thread : HANDLE
' CpuSetMasks : GROUP_AFFINITY* optional
' CpuSetMaskCount : WORD
Declare PtrSafe Function SetThreadSelectedCpuSetMasks Lib "kernel32" ( _
    ByVal Thread As LongPtr, _
    ByVal CpuSetMasks As LongPtr, _
    ByVal CpuSetMaskCount As Integer) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SetThreadSelectedCpuSetMasks = ctypes.windll.kernel32.SetThreadSelectedCpuSetMasks
SetThreadSelectedCpuSetMasks.restype = wintypes.BOOL
SetThreadSelectedCpuSetMasks.argtypes = [
    wintypes.HANDLE,  # Thread : HANDLE
    ctypes.c_void_p,  # CpuSetMasks : GROUP_AFFINITY* optional
    ctypes.c_ushort,  # CpuSetMaskCount : WORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetThreadSelectedCpuSetMasks = Fiddle::Function.new(
  lib['SetThreadSelectedCpuSetMasks'],
  [
    Fiddle::TYPE_VOIDP,  # Thread : HANDLE
    Fiddle::TYPE_VOIDP,  # CpuSetMasks : GROUP_AFFINITY* optional
    -Fiddle::TYPE_SHORT,  # CpuSetMaskCount : WORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetThreadSelectedCpuSetMasks(
        Thread: *mut core::ffi::c_void,  // HANDLE
        CpuSetMasks: *mut GROUP_AFFINITY,  // GROUP_AFFINITY* optional
        CpuSetMaskCount: u16  // WORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll")]
public static extern bool SetThreadSelectedCpuSetMasks(IntPtr Thread, IntPtr CpuSetMasks, ushort CpuSetMaskCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetThreadSelectedCpuSetMasks' -Namespace Win32 -PassThru
# $api::SetThreadSelectedCpuSetMasks(Thread, CpuSetMasks, CpuSetMaskCount)

#uselib "KERNEL32.dll"
#func global SetThreadSelectedCpuSetMasks "SetThreadSelectedCpuSetMasks" sptr, sptr, sptr
; SetThreadSelectedCpuSetMasks Thread, varptr(CpuSetMasks), CpuSetMaskCount   ; 戻り値は stat
; Thread : HANDLE -> "sptr"
; CpuSetMasks : GROUP_AFFINITY* optional -> "sptr"
; CpuSetMaskCount : WORD -> "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 "KERNEL32.dll"
#cfunc global SetThreadSelectedCpuSetMasks "SetThreadSelectedCpuSetMasks" sptr, var, int
; res = SetThreadSelectedCpuSetMasks(Thread, CpuSetMasks, CpuSetMaskCount)
; Thread : HANDLE -> "sptr"
; CpuSetMasks : GROUP_AFFINITY* optional -> "var"
; CpuSetMaskCount : WORD -> "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。

; BOOL SetThreadSelectedCpuSetMasks(HANDLE Thread, GROUP_AFFINITY* CpuSetMasks, WORD CpuSetMaskCount)
#uselib "KERNEL32.dll"
#cfunc global SetThreadSelectedCpuSetMasks "SetThreadSelectedCpuSetMasks" intptr, var, int
; res = SetThreadSelectedCpuSetMasks(Thread, CpuSetMasks, CpuSetMaskCount)
; Thread : HANDLE -> "intptr"
; CpuSetMasks : GROUP_AFFINITY* optional -> "var"
; CpuSetMaskCount : WORD -> "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。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetThreadSelectedCpuSetMasks = kernel32.NewProc("SetThreadSelectedCpuSetMasks")
)

// Thread (HANDLE), CpuSetMasks (GROUP_AFFINITY* optional), CpuSetMaskCount (WORD)
r1, _, err := procSetThreadSelectedCpuSetMasks.Call(
	uintptr(Thread),
	uintptr(CpuSetMasks),
	uintptr(CpuSetMaskCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetThreadSelectedCpuSetMasks(
  Thread: THandle;   // HANDLE
  CpuSetMasks: Pointer;   // GROUP_AFFINITY* optional
  CpuSetMaskCount: Word   // WORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetThreadSelectedCpuSetMasks';

result := DllCall("KERNEL32\SetThreadSelectedCpuSetMasks"
    , "Ptr", Thread   ; HANDLE
    , "Ptr", CpuSetMasks   ; GROUP_AFFINITY* optional
    , "UShort", CpuSetMaskCount   ; WORD
    , "Int")   ; return: BOOL

●SetThreadSelectedCpuSetMasks(Thread, CpuSetMasks, CpuSetMaskCount) = DLL("KERNEL32.dll", "bool SetThreadSelectedCpuSetMasks(void*, void*, int)")
# 呼び出し: SetThreadSelectedCpuSetMasks(Thread, CpuSetMasks, CpuSetMaskCount)
# Thread : HANDLE -> "void*"
# CpuSetMasks : GROUP_AFFINITY* optional -> "void*"
# CpuSetMaskCount : WORD -> "int"
# 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)。