SetThreadIdealProcessor

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

DWORD SetThreadIdealProcessor(
    HANDLE hThread,
    DWORD dwIdealProcessor
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetThreadIdealProcessor(
    hThread As IntPtr,   ' HANDLE
    dwIdealProcessor As UInteger   ' DWORD
) As UInteger
End Function

' hThread : HANDLE
' dwIdealProcessor : DWORD
Declare PtrSafe Function SetThreadIdealProcessor Lib "kernel32" ( _
    ByVal hThread As LongPtr, _
    ByVal dwIdealProcessor 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

SetThreadIdealProcessor = ctypes.windll.kernel32.SetThreadIdealProcessor
SetThreadIdealProcessor.restype = wintypes.DWORD
SetThreadIdealProcessor.argtypes = [
    wintypes.HANDLE,  # hThread : HANDLE
    wintypes.DWORD,  # dwIdealProcessor : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetThreadIdealProcessor = Fiddle::Function.new(
  lib['SetThreadIdealProcessor'],
  [
    Fiddle::TYPE_VOIDP,  # hThread : HANDLE
    -Fiddle::TYPE_INT,  # dwIdealProcessor : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetThreadIdealProcessor(
        hThread: *mut core::ffi::c_void,  // HANDLE
        dwIdealProcessor: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern uint SetThreadIdealProcessor(IntPtr hThread, uint dwIdealProcessor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetThreadIdealProcessor' -Namespace Win32 -PassThru
# $api::SetThreadIdealProcessor(hThread, dwIdealProcessor)

#uselib "KERNEL32.dll"
#func global SetThreadIdealProcessor "SetThreadIdealProcessor" sptr, sptr
; SetThreadIdealProcessor hThread, dwIdealProcessor   ; 戻り値は stat
; hThread : HANDLE -> "sptr"
; dwIdealProcessor : 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。

#uselib "KERNEL32.dll"
#cfunc global SetThreadIdealProcessor "SetThreadIdealProcessor" sptr, int
; res = SetThreadIdealProcessor(hThread, dwIdealProcessor)
; hThread : HANDLE -> "sptr"
; dwIdealProcessor : DWORD -> "int"

; DWORD SetThreadIdealProcessor(HANDLE hThread, DWORD dwIdealProcessor)
#uselib "KERNEL32.dll"
#cfunc global SetThreadIdealProcessor "SetThreadIdealProcessor" intptr, int
; res = SetThreadIdealProcessor(hThread, dwIdealProcessor)
; hThread : HANDLE -> "intptr"
; dwIdealProcessor : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetThreadIdealProcessor = kernel32.NewProc("SetThreadIdealProcessor")
)

// hThread (HANDLE), dwIdealProcessor (DWORD)
r1, _, err := procSetThreadIdealProcessor.Call(
	uintptr(hThread),
	uintptr(dwIdealProcessor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SetThreadIdealProcessor(
  hThread: THandle;   // HANDLE
  dwIdealProcessor: DWORD   // DWORD
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'SetThreadIdealProcessor';

result := DllCall("KERNEL32\SetThreadIdealProcessor"
    , "Ptr", hThread   ; HANDLE
    , "UInt", dwIdealProcessor   ; DWORD
    , "UInt")   ; return: DWORD

●SetThreadIdealProcessor(hThread, dwIdealProcessor) = DLL("KERNEL32.dll", "dword SetThreadIdealProcessor(void*, dword)")
# 呼び出し: SetThreadIdealProcessor(hThread, dwIdealProcessor)
# hThread : HANDLE -> "void*"
# dwIdealProcessor : 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)。