CreateIoCompletionPort

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

HANDLE CreateIoCompletionPort(
    HANDLE FileHandle,
    HANDLE ExistingCompletionPort,   // optional
    UINT_PTR CompletionKey,
    DWORD NumberOfConcurrentThreads
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CreateIoCompletionPort(
    FileHandle As IntPtr,   ' HANDLE
    ExistingCompletionPort As IntPtr,   ' HANDLE optional
    CompletionKey As UIntPtr,   ' UINT_PTR
    NumberOfConcurrentThreads As UInteger   ' DWORD
) As IntPtr
End Function

' FileHandle : HANDLE
' ExistingCompletionPort : HANDLE optional
' CompletionKey : UINT_PTR
' NumberOfConcurrentThreads : DWORD
Declare PtrSafe Function CreateIoCompletionPort Lib "kernel32" ( _
    ByVal FileHandle As LongPtr, _
    ByVal ExistingCompletionPort As LongPtr, _
    ByVal CompletionKey As LongPtr, _
    ByVal NumberOfConcurrentThreads As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

CreateIoCompletionPort = ctypes.windll.kernel32.CreateIoCompletionPort
CreateIoCompletionPort.restype = ctypes.c_void_p
CreateIoCompletionPort.argtypes = [
    wintypes.HANDLE,  # FileHandle : HANDLE
    wintypes.HANDLE,  # ExistingCompletionPort : HANDLE optional
    ctypes.c_size_t,  # CompletionKey : UINT_PTR
    wintypes.DWORD,  # NumberOfConcurrentThreads : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
CreateIoCompletionPort = Fiddle::Function.new(
  lib['CreateIoCompletionPort'],
  [
    Fiddle::TYPE_VOIDP,  # FileHandle : HANDLE
    Fiddle::TYPE_VOIDP,  # ExistingCompletionPort : HANDLE optional
    Fiddle::TYPE_UINTPTR_T,  # CompletionKey : UINT_PTR
    -Fiddle::TYPE_INT,  # NumberOfConcurrentThreads : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn CreateIoCompletionPort(
        FileHandle: *mut core::ffi::c_void,  // HANDLE
        ExistingCompletionPort: *mut core::ffi::c_void,  // HANDLE optional
        CompletionKey: usize,  // UINT_PTR
        NumberOfConcurrentThreads: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern IntPtr CreateIoCompletionPort(IntPtr FileHandle, IntPtr ExistingCompletionPort, UIntPtr CompletionKey, uint NumberOfConcurrentThreads);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_CreateIoCompletionPort' -Namespace Win32 -PassThru
# $api::CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)

#uselib "KERNEL32.dll"
#func global CreateIoCompletionPort "CreateIoCompletionPort" sptr, sptr, sptr, sptr
; CreateIoCompletionPort FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads   ; 戻り値は stat
; FileHandle : HANDLE -> "sptr"
; ExistingCompletionPort : HANDLE optional -> "sptr"
; CompletionKey : UINT_PTR -> "sptr"
; NumberOfConcurrentThreads : 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 CreateIoCompletionPort "CreateIoCompletionPort" sptr, sptr, sptr, int
; res = CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
; FileHandle : HANDLE -> "sptr"
; ExistingCompletionPort : HANDLE optional -> "sptr"
; CompletionKey : UINT_PTR -> "sptr"
; NumberOfConcurrentThreads : DWORD -> "int"

; HANDLE CreateIoCompletionPort(HANDLE FileHandle, HANDLE ExistingCompletionPort, UINT_PTR CompletionKey, DWORD NumberOfConcurrentThreads)
#uselib "KERNEL32.dll"
#cfunc global CreateIoCompletionPort "CreateIoCompletionPort" intptr, intptr, intptr, int
; res = CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
; FileHandle : HANDLE -> "intptr"
; ExistingCompletionPort : HANDLE optional -> "intptr"
; CompletionKey : UINT_PTR -> "intptr"
; NumberOfConcurrentThreads : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procCreateIoCompletionPort = kernel32.NewProc("CreateIoCompletionPort")
)

// FileHandle (HANDLE), ExistingCompletionPort (HANDLE optional), CompletionKey (UINT_PTR), NumberOfConcurrentThreads (DWORD)
r1, _, err := procCreateIoCompletionPort.Call(
	uintptr(FileHandle),
	uintptr(ExistingCompletionPort),
	uintptr(CompletionKey),
	uintptr(NumberOfConcurrentThreads),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function CreateIoCompletionPort(
  FileHandle: THandle;   // HANDLE
  ExistingCompletionPort: THandle;   // HANDLE optional
  CompletionKey: NativeUInt;   // UINT_PTR
  NumberOfConcurrentThreads: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'CreateIoCompletionPort';

result := DllCall("KERNEL32\CreateIoCompletionPort"
    , "Ptr", FileHandle   ; HANDLE
    , "Ptr", ExistingCompletionPort   ; HANDLE optional
    , "UPtr", CompletionKey   ; UINT_PTR
    , "UInt", NumberOfConcurrentThreads   ; DWORD
    , "Ptr")   ; return: HANDLE

●CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads) = DLL("KERNEL32.dll", "void* CreateIoCompletionPort(void*, void*, int, dword)")
# 呼び出し: CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
# FileHandle : HANDLE -> "void*"
# ExistingCompletionPort : HANDLE optional -> "void*"
# CompletionKey : UINT_PTR -> "int"
# NumberOfConcurrentThreads : 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)。

const std = @import("std");

extern "kernel32" fn CreateIoCompletionPort(
    FileHandle: ?*anyopaque, // HANDLE
    ExistingCompletionPort: ?*anyopaque, // HANDLE optional
    CompletionKey: usize, // UINT_PTR
    NumberOfConcurrentThreads: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc CreateIoCompletionPort(
    FileHandle: pointer,  # HANDLE
    ExistingCompletionPort: pointer,  # HANDLE optional
    CompletionKey: uint,  # UINT_PTR
    NumberOfConcurrentThreads: uint32  # DWORD
): pointer {.importc: "CreateIoCompletionPort", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
void* CreateIoCompletionPort(
    void* FileHandle,   // HANDLE
    void* ExistingCompletionPort,   // HANDLE optional
    size_t CompletionKey,   // UINT_PTR
    uint NumberOfConcurrentThreads   // DWORD
);

ccall((:CreateIoCompletionPort, "KERNEL32.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid}, Ptr{Cvoid}, Csize_t, UInt32),
      FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
# FileHandle : HANDLE -> Ptr{Cvoid}
# ExistingCompletionPort : HANDLE optional -> Ptr{Cvoid}
# CompletionKey : UINT_PTR -> Csize_t
# NumberOfConcurrentThreads : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* CreateIoCompletionPort(
    void* FileHandle,
    void* ExistingCompletionPort,
    uintptr_t CompletionKey,
    uint32_t NumberOfConcurrentThreads);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
-- FileHandle : HANDLE
-- ExistingCompletionPort : HANDLE optional
-- CompletionKey : UINT_PTR
-- NumberOfConcurrentThreads : DWORD
-- 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 CreateIoCompletionPort = lib.func('__stdcall', 'CreateIoCompletionPort', 'void *', ['void *', 'void *', 'uintptr_t', 'uint32_t']);
// CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
// FileHandle : HANDLE -> 'void *'
// ExistingCompletionPort : HANDLE optional -> 'void *'
// CompletionKey : UINT_PTR -> 'uintptr_t'
// NumberOfConcurrentThreads : DWORD -> 'uint32_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", {
  CreateIoCompletionPort: { parameters: ["pointer", "pointer", "usize", "u32"], result: "pointer" },
});
// lib.symbols.CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads)
// FileHandle : HANDLE -> "pointer"
// ExistingCompletionPort : HANDLE optional -> "pointer"
// CompletionKey : UINT_PTR -> "usize"
// NumberOfConcurrentThreads : DWORD -> "u32"
// 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
void* CreateIoCompletionPort(
    void* FileHandle,
    void* ExistingCompletionPort,
    size_t CompletionKey,
    uint32_t NumberOfConcurrentThreads);
C, "KERNEL32.dll");
// $ffi->CreateIoCompletionPort(FileHandle, ExistingCompletionPort, CompletionKey, NumberOfConcurrentThreads);
// FileHandle : HANDLE
// ExistingCompletionPort : HANDLE optional
// CompletionKey : UINT_PTR
// NumberOfConcurrentThreads : DWORD
// 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);
    Pointer CreateIoCompletionPort(
        Pointer FileHandle,   // HANDLE
        Pointer ExistingCompletionPort,   // HANDLE optional
        long CompletionKey,   // UINT_PTR
        int NumberOfConcurrentThreads   // DWORD
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun CreateIoCompletionPort = CreateIoCompletionPort(
    FileHandle : Void*,   # HANDLE
    ExistingCompletionPort : Void*,   # HANDLE optional
    CompletionKey : LibC::SizeT,   # UINT_PTR
    NumberOfConcurrentThreads : UInt32   # DWORD
  ) : Void*
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 CreateIoCompletionPortNative = Pointer<Void> Function(Pointer<Void>, Pointer<Void>, UintPtr, Uint32);
typedef CreateIoCompletionPortDart = Pointer<Void> Function(Pointer<Void>, Pointer<Void>, int, int);
final CreateIoCompletionPort = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<CreateIoCompletionPortNative, CreateIoCompletionPortDart>('CreateIoCompletionPort');
// FileHandle : HANDLE -> Pointer<Void>
// ExistingCompletionPort : HANDLE optional -> Pointer<Void>
// CompletionKey : UINT_PTR -> UintPtr
// NumberOfConcurrentThreads : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CreateIoCompletionPort(
  FileHandle: THandle;   // HANDLE
  ExistingCompletionPort: THandle;   // HANDLE optional
  CompletionKey: NativeUInt;   // UINT_PTR
  NumberOfConcurrentThreads: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'CreateIoCompletionPort';

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

foreign import stdcall safe "CreateIoCompletionPort"
  c_CreateIoCompletionPort :: Ptr () -> Ptr () -> CUIntPtr -> Word32 -> IO (Ptr ())
-- FileHandle : HANDLE -> Ptr ()
-- ExistingCompletionPort : HANDLE optional -> Ptr ()
-- CompletionKey : UINT_PTR -> CUIntPtr
-- NumberOfConcurrentThreads : DWORD -> Word32
-- 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 createiocompletionport =
  foreign "CreateIoCompletionPort"
    ((ptr void) @-> (ptr void) @-> size_t @-> uint32_t @-> returning (ptr void))
(* FileHandle : HANDLE -> (ptr void) *)
(* ExistingCompletionPort : HANDLE optional -> (ptr void) *)
(* CompletionKey : UINT_PTR -> size_t *)
(* NumberOfConcurrentThreads : DWORD -> uint32_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 ("CreateIoCompletionPort" create-io-completion-port :convention :stdcall) :pointer
  (file-handle :pointer)   ; HANDLE
  (existing-completion-port :pointer)   ; HANDLE optional
  (completion-key :uint64)   ; UINT_PTR
  (number-of-concurrent-threads :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CreateIoCompletionPort = Win32::API::More->new('KERNEL32',
    'HANDLE CreateIoCompletionPort(HANDLE FileHandle, HANDLE ExistingCompletionPort, WPARAM CompletionKey, DWORD NumberOfConcurrentThreads)');
# my $ret = $CreateIoCompletionPort->Call($FileHandle, $ExistingCompletionPort, $CompletionKey, $NumberOfConcurrentThreads);
# FileHandle : HANDLE -> HANDLE
# ExistingCompletionPort : HANDLE optional -> HANDLE
# CompletionKey : UINT_PTR -> WPARAM
# NumberOfConcurrentThreads : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。