QueryIdleProcessorCycleTime

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

BOOL QueryIdleProcessorCycleTime(
    DWORD* BufferLength,
    ULONGLONG* ProcessorIdleCycleTime   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function QueryIdleProcessorCycleTime(
    ByRef BufferLength As UInteger,   ' DWORD* in/out
    ProcessorIdleCycleTime As IntPtr   ' ULONGLONG* optional, out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' BufferLength : DWORD* in/out
' ProcessorIdleCycleTime : ULONGLONG* optional, out
Declare PtrSafe Function QueryIdleProcessorCycleTime Lib "kernel32" ( _
    ByRef BufferLength As Long, _
    ByVal ProcessorIdleCycleTime 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

QueryIdleProcessorCycleTime = ctypes.windll.kernel32.QueryIdleProcessorCycleTime
QueryIdleProcessorCycleTime.restype = wintypes.BOOL
QueryIdleProcessorCycleTime.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # BufferLength : DWORD* in/out
    ctypes.POINTER(ctypes.c_ulonglong),  # ProcessorIdleCycleTime : ULONGLONG* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
QueryIdleProcessorCycleTime = Fiddle::Function.new(
  lib['QueryIdleProcessorCycleTime'],
  [
    Fiddle::TYPE_VOIDP,  # BufferLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # ProcessorIdleCycleTime : ULONGLONG* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn QueryIdleProcessorCycleTime(
        BufferLength: *mut u32,  // DWORD* in/out
        ProcessorIdleCycleTime: *mut u64  // ULONGLONG* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool QueryIdleProcessorCycleTime(ref uint BufferLength, IntPtr ProcessorIdleCycleTime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_QueryIdleProcessorCycleTime' -Namespace Win32 -PassThru
# $api::QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime)

#uselib "KERNEL32.dll"
#func global QueryIdleProcessorCycleTime "QueryIdleProcessorCycleTime" sptr, sptr
; QueryIdleProcessorCycleTime varptr(BufferLength), varptr(ProcessorIdleCycleTime)   ; 戻り値は stat
; BufferLength : DWORD* in/out -> "sptr"
; ProcessorIdleCycleTime : ULONGLONG* 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。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procQueryIdleProcessorCycleTime = kernel32.NewProc("QueryIdleProcessorCycleTime")
)

// BufferLength (DWORD* in/out), ProcessorIdleCycleTime (ULONGLONG* optional, out)
r1, _, err := procQueryIdleProcessorCycleTime.Call(
	uintptr(BufferLength),
	uintptr(ProcessorIdleCycleTime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function QueryIdleProcessorCycleTime(
  BufferLength: Pointer;   // DWORD* in/out
  ProcessorIdleCycleTime: Pointer   // ULONGLONG* optional, out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'QueryIdleProcessorCycleTime';

result := DllCall("KERNEL32\QueryIdleProcessorCycleTime"
    , "Ptr", BufferLength   ; DWORD* in/out
    , "Ptr", ProcessorIdleCycleTime   ; ULONGLONG* optional, out
    , "Int")   ; return: BOOL

●QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime) = DLL("KERNEL32.dll", "bool QueryIdleProcessorCycleTime(void*, void*)")
# 呼び出し: QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime)
# BufferLength : DWORD* in/out -> "void*"
# ProcessorIdleCycleTime : ULONGLONG* 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)。

const std = @import("std");

extern "kernel32" fn QueryIdleProcessorCycleTime(
    BufferLength: [*c]u32, // DWORD* in/out
    ProcessorIdleCycleTime: [*c]u64 // ULONGLONG* optional, out
) callconv(std.os.windows.WINAPI) i32;

proc QueryIdleProcessorCycleTime(
    BufferLength: ptr uint32,  # DWORD* in/out
    ProcessorIdleCycleTime: ptr uint64  # ULONGLONG* optional, out
): int32 {.importc: "QueryIdleProcessorCycleTime", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int QueryIdleProcessorCycleTime(
    uint* BufferLength,   // DWORD* in/out
    ulong* ProcessorIdleCycleTime   // ULONGLONG* optional, out
);

ccall((:QueryIdleProcessorCycleTime, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{UInt32}, Ptr{UInt64}),
      BufferLength, ProcessorIdleCycleTime)
# BufferLength : DWORD* in/out -> Ptr{UInt32}
# ProcessorIdleCycleTime : ULONGLONG* optional, out -> Ptr{UInt64}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t QueryIdleProcessorCycleTime(
    uint32_t* BufferLength,
    uint64_t* ProcessorIdleCycleTime);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime)
-- BufferLength : DWORD* in/out
-- ProcessorIdleCycleTime : ULONGLONG* optional, out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('KERNEL32.dll');
const QueryIdleProcessorCycleTime = lib.func('__stdcall', 'QueryIdleProcessorCycleTime', 'int32_t', ['uint32_t *', 'uint64_t *']);
// QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime)
// BufferLength : DWORD* in/out -> 'uint32_t *'
// ProcessorIdleCycleTime : ULONGLONG* optional, out -> 'uint64_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("KERNEL32.dll", {
  QueryIdleProcessorCycleTime: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime)
// BufferLength : DWORD* in/out -> "pointer"
// ProcessorIdleCycleTime : ULONGLONG* optional, out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t QueryIdleProcessorCycleTime(
    uint32_t* BufferLength,
    uint64_t* ProcessorIdleCycleTime);
C, "KERNEL32.dll");
// $ffi->QueryIdleProcessorCycleTime(BufferLength, ProcessorIdleCycleTime);
// BufferLength : DWORD* in/out
// ProcessorIdleCycleTime : ULONGLONG* optional, out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    boolean QueryIdleProcessorCycleTime(
        IntByReference BufferLength,   // DWORD* in/out
        LongByReference ProcessorIdleCycleTime   // ULONGLONG* optional, out
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun QueryIdleProcessorCycleTime = QueryIdleProcessorCycleTime(
    BufferLength : UInt32*,   # DWORD* in/out
    ProcessorIdleCycleTime : UInt64*   # ULONGLONG* optional, out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef QueryIdleProcessorCycleTimeNative = Int32 Function(Pointer<Uint32>, Pointer<Uint64>);
typedef QueryIdleProcessorCycleTimeDart = int Function(Pointer<Uint32>, Pointer<Uint64>);
final QueryIdleProcessorCycleTime = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<QueryIdleProcessorCycleTimeNative, QueryIdleProcessorCycleTimeDart>('QueryIdleProcessorCycleTime');
// BufferLength : DWORD* in/out -> Pointer<Uint32>
// ProcessorIdleCycleTime : ULONGLONG* optional, out -> Pointer<Uint64>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function QueryIdleProcessorCycleTime(
  BufferLength: Pointer;   // DWORD* in/out
  ProcessorIdleCycleTime: Pointer   // ULONGLONG* optional, out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'QueryIdleProcessorCycleTime';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "QueryIdleProcessorCycleTime"
  c_QueryIdleProcessorCycleTime :: Ptr Word32 -> Ptr Word64 -> IO CInt
-- BufferLength : DWORD* in/out -> Ptr Word32
-- ProcessorIdleCycleTime : ULONGLONG* optional, out -> Ptr Word64
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let queryidleprocessorcycletime =
  foreign "QueryIdleProcessorCycleTime"
    ((ptr uint32_t) @-> (ptr uint64_t) @-> returning int32_t)
(* BufferLength : DWORD* in/out -> (ptr uint32_t) *)
(* ProcessorIdleCycleTime : ULONGLONG* optional, out -> (ptr uint64_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("QueryIdleProcessorCycleTime" query-idle-processor-cycle-time :convention :stdcall) :int32
  (buffer-length :pointer)   ; DWORD* in/out
  (processor-idle-cycle-time :pointer))   ; ULONGLONG* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $QueryIdleProcessorCycleTime = Win32::API::More->new('KERNEL32',
    'BOOL QueryIdleProcessorCycleTime(LPVOID BufferLength, LPVOID ProcessorIdleCycleTime)');
# my $ret = $QueryIdleProcessorCycleTime->Call($BufferLength, $ProcessorIdleCycleTime);
# BufferLength : DWORD* in/out -> LPVOID
# ProcessorIdleCycleTime : ULONGLONG* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。