PeerDistServerOpenContentInformationEx

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

DWORD PeerDistServerOpenContentInformationEx(
    INT_PTR hPeerDist,
    DWORD cbContentIdentifier,
    BYTE* pContentIdentifier,
    ULONGLONG ullContentOffset,
    ULONGLONG cbContentLength,
    PEERDIST_RETRIEVAL_OPTIONS* pRetrievalOptions,
    HANDLE hCompletionPort,   // optional
    UINT_PTR ulCompletionKey,   // optional
    INT_PTR* phContentInfo
);

<DllImport("PeerDist.dll", ExactSpelling:=True)>
Public Shared Function PeerDistServerOpenContentInformationEx(
    hPeerDist As IntPtr,   ' INT_PTR
    cbContentIdentifier As UInteger,   ' DWORD
    pContentIdentifier As IntPtr,   ' BYTE*
    ullContentOffset As ULong,   ' ULONGLONG
    cbContentLength As ULong,   ' ULONGLONG
    pRetrievalOptions As IntPtr,   ' PEERDIST_RETRIEVAL_OPTIONS*
    hCompletionPort As IntPtr,   ' HANDLE optional
    ulCompletionKey As UIntPtr,   ' UINT_PTR optional
    <Out> ByRef phContentInfo As IntPtr   ' INT_PTR* out
) As UInteger
End Function

' hPeerDist : INT_PTR
' cbContentIdentifier : DWORD
' pContentIdentifier : BYTE*
' ullContentOffset : ULONGLONG
' cbContentLength : ULONGLONG
' pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*
' hCompletionPort : HANDLE optional
' ulCompletionKey : UINT_PTR optional
' phContentInfo : INT_PTR* out
Declare PtrSafe Function PeerDistServerOpenContentInformationEx Lib "peerdist" ( _
    ByVal hPeerDist As LongPtr, _
    ByVal cbContentIdentifier As Long, _
    ByVal pContentIdentifier As LongPtr, _
    ByVal ullContentOffset As LongLong, _
    ByVal cbContentLength As LongLong, _
    ByVal pRetrievalOptions As LongPtr, _
    ByVal hCompletionPort As LongPtr, _
    ByVal ulCompletionKey As LongPtr, _
    ByRef phContentInfo 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

PeerDistServerOpenContentInformationEx = ctypes.windll.peerdist.PeerDistServerOpenContentInformationEx
PeerDistServerOpenContentInformationEx.restype = wintypes.DWORD
PeerDistServerOpenContentInformationEx.argtypes = [
    ctypes.c_ssize_t,  # hPeerDist : INT_PTR
    wintypes.DWORD,  # cbContentIdentifier : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # pContentIdentifier : BYTE*
    ctypes.c_ulonglong,  # ullContentOffset : ULONGLONG
    ctypes.c_ulonglong,  # cbContentLength : ULONGLONG
    ctypes.c_void_p,  # pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*
    wintypes.HANDLE,  # hCompletionPort : HANDLE optional
    ctypes.c_size_t,  # ulCompletionKey : UINT_PTR optional
    ctypes.POINTER(ctypes.c_ssize_t),  # phContentInfo : INT_PTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PeerDist.dll')
PeerDistServerOpenContentInformationEx = Fiddle::Function.new(
  lib['PeerDistServerOpenContentInformationEx'],
  [
    Fiddle::TYPE_INTPTR_T,  # hPeerDist : INT_PTR
    -Fiddle::TYPE_INT,  # cbContentIdentifier : DWORD
    Fiddle::TYPE_VOIDP,  # pContentIdentifier : BYTE*
    -Fiddle::TYPE_LONG_LONG,  # ullContentOffset : ULONGLONG
    -Fiddle::TYPE_LONG_LONG,  # cbContentLength : ULONGLONG
    Fiddle::TYPE_VOIDP,  # pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*
    Fiddle::TYPE_VOIDP,  # hCompletionPort : HANDLE optional
    Fiddle::TYPE_UINTPTR_T,  # ulCompletionKey : UINT_PTR optional
    Fiddle::TYPE_VOIDP,  # phContentInfo : INT_PTR* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "peerdist")]
extern "system" {
    fn PeerDistServerOpenContentInformationEx(
        hPeerDist: isize,  // INT_PTR
        cbContentIdentifier: u32,  // DWORD
        pContentIdentifier: *mut u8,  // BYTE*
        ullContentOffset: u64,  // ULONGLONG
        cbContentLength: u64,  // ULONGLONG
        pRetrievalOptions: *mut PEERDIST_RETRIEVAL_OPTIONS,  // PEERDIST_RETRIEVAL_OPTIONS*
        hCompletionPort: *mut core::ffi::c_void,  // HANDLE optional
        ulCompletionKey: usize,  // UINT_PTR optional
        phContentInfo: *mut isize  // INT_PTR* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PeerDist.dll")]
public static extern uint PeerDistServerOpenContentInformationEx(IntPtr hPeerDist, uint cbContentIdentifier, IntPtr pContentIdentifier, ulong ullContentOffset, ulong cbContentLength, IntPtr pRetrievalOptions, IntPtr hCompletionPort, UIntPtr ulCompletionKey, out IntPtr phContentInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PeerDist_PeerDistServerOpenContentInformationEx' -Namespace Win32 -PassThru
# $api::PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)

#uselib "PeerDist.dll"
#func global PeerDistServerOpenContentInformationEx "PeerDistServerOpenContentInformationEx" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; PeerDistServerOpenContentInformationEx hPeerDist, cbContentIdentifier, varptr(pContentIdentifier), ullContentOffset, cbContentLength, varptr(pRetrievalOptions), hCompletionPort, ulCompletionKey, varptr(phContentInfo)   ; 戻り値は stat
; hPeerDist : INT_PTR -> "sptr"
; cbContentIdentifier : DWORD -> "sptr"
; pContentIdentifier : BYTE* -> "sptr"
; ullContentOffset : ULONGLONG -> "sptr"
; cbContentLength : ULONGLONG -> "sptr"
; pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> "sptr"
; hCompletionPort : HANDLE optional -> "sptr"
; ulCompletionKey : UINT_PTR optional -> "sptr"
; phContentInfo : INT_PTR* out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 (
	peerdist = windows.NewLazySystemDLL("PeerDist.dll")
	procPeerDistServerOpenContentInformationEx = peerdist.NewProc("PeerDistServerOpenContentInformationEx")
)

// hPeerDist (INT_PTR), cbContentIdentifier (DWORD), pContentIdentifier (BYTE*), ullContentOffset (ULONGLONG), cbContentLength (ULONGLONG), pRetrievalOptions (PEERDIST_RETRIEVAL_OPTIONS*), hCompletionPort (HANDLE optional), ulCompletionKey (UINT_PTR optional), phContentInfo (INT_PTR* out)
r1, _, err := procPeerDistServerOpenContentInformationEx.Call(
	uintptr(hPeerDist),
	uintptr(cbContentIdentifier),
	uintptr(pContentIdentifier),
	uintptr(ullContentOffset),
	uintptr(cbContentLength),
	uintptr(pRetrievalOptions),
	uintptr(hCompletionPort),
	uintptr(ulCompletionKey),
	uintptr(phContentInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PeerDistServerOpenContentInformationEx(
  hPeerDist: NativeInt;   // INT_PTR
  cbContentIdentifier: DWORD;   // DWORD
  pContentIdentifier: Pointer;   // BYTE*
  ullContentOffset: UInt64;   // ULONGLONG
  cbContentLength: UInt64;   // ULONGLONG
  pRetrievalOptions: Pointer;   // PEERDIST_RETRIEVAL_OPTIONS*
  hCompletionPort: THandle;   // HANDLE optional
  ulCompletionKey: NativeUInt;   // UINT_PTR optional
  phContentInfo: Pointer   // INT_PTR* out
): DWORD; stdcall;
  external 'PeerDist.dll' name 'PeerDistServerOpenContentInformationEx';

result := DllCall("PeerDist\PeerDistServerOpenContentInformationEx"
    , "Ptr", hPeerDist   ; INT_PTR
    , "UInt", cbContentIdentifier   ; DWORD
    , "Ptr", pContentIdentifier   ; BYTE*
    , "Int64", ullContentOffset   ; ULONGLONG
    , "Int64", cbContentLength   ; ULONGLONG
    , "Ptr", pRetrievalOptions   ; PEERDIST_RETRIEVAL_OPTIONS*
    , "Ptr", hCompletionPort   ; HANDLE optional
    , "UPtr", ulCompletionKey   ; UINT_PTR optional
    , "Ptr", phContentInfo   ; INT_PTR* out
    , "UInt")   ; return: DWORD

●PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo) = DLL("PeerDist.dll", "dword PeerDistServerOpenContentInformationEx(int, dword, void*, qword, qword, void*, void*, int, void*)")
# 呼び出し: PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)
# hPeerDist : INT_PTR -> "int"
# cbContentIdentifier : DWORD -> "dword"
# pContentIdentifier : BYTE* -> "void*"
# ullContentOffset : ULONGLONG -> "qword"
# cbContentLength : ULONGLONG -> "qword"
# pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> "void*"
# hCompletionPort : HANDLE optional -> "void*"
# ulCompletionKey : UINT_PTR optional -> "int"
# phContentInfo : INT_PTR* 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 "peerdist" fn PeerDistServerOpenContentInformationEx(
    hPeerDist: isize, // INT_PTR
    cbContentIdentifier: u32, // DWORD
    pContentIdentifier: [*c]u8, // BYTE*
    ullContentOffset: u64, // ULONGLONG
    cbContentLength: u64, // ULONGLONG
    pRetrievalOptions: [*c]PEERDIST_RETRIEVAL_OPTIONS, // PEERDIST_RETRIEVAL_OPTIONS*
    hCompletionPort: ?*anyopaque, // HANDLE optional
    ulCompletionKey: usize, // UINT_PTR optional
    phContentInfo: [*c]isize // INT_PTR* out
) callconv(std.os.windows.WINAPI) u32;

proc PeerDistServerOpenContentInformationEx(
    hPeerDist: int,  # INT_PTR
    cbContentIdentifier: uint32,  # DWORD
    pContentIdentifier: ptr uint8,  # BYTE*
    ullContentOffset: uint64,  # ULONGLONG
    cbContentLength: uint64,  # ULONGLONG
    pRetrievalOptions: ptr PEERDIST_RETRIEVAL_OPTIONS,  # PEERDIST_RETRIEVAL_OPTIONS*
    hCompletionPort: pointer,  # HANDLE optional
    ulCompletionKey: uint,  # UINT_PTR optional
    phContentInfo: ptr int  # INT_PTR* out
): uint32 {.importc: "PeerDistServerOpenContentInformationEx", stdcall, dynlib: "PeerDist.dll".}

pragma(lib, "peerdist");
extern(Windows)
uint PeerDistServerOpenContentInformationEx(
    ptrdiff_t hPeerDist,   // INT_PTR
    uint cbContentIdentifier,   // DWORD
    ubyte* pContentIdentifier,   // BYTE*
    ulong ullContentOffset,   // ULONGLONG
    ulong cbContentLength,   // ULONGLONG
    PEERDIST_RETRIEVAL_OPTIONS* pRetrievalOptions,   // PEERDIST_RETRIEVAL_OPTIONS*
    void* hCompletionPort,   // HANDLE optional
    size_t ulCompletionKey,   // UINT_PTR optional
    ptrdiff_t* phContentInfo   // INT_PTR* out
);

ccall((:PeerDistServerOpenContentInformationEx, "PeerDist.dll"), stdcall, UInt32,
      (Int, UInt32, Ptr{UInt8}, UInt64, UInt64, Ptr{PEERDIST_RETRIEVAL_OPTIONS}, Ptr{Cvoid}, Csize_t, Ptr{Int}),
      hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)
# hPeerDist : INT_PTR -> Int
# cbContentIdentifier : DWORD -> UInt32
# pContentIdentifier : BYTE* -> Ptr{UInt8}
# ullContentOffset : ULONGLONG -> UInt64
# cbContentLength : ULONGLONG -> UInt64
# pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> Ptr{PEERDIST_RETRIEVAL_OPTIONS}
# hCompletionPort : HANDLE optional -> Ptr{Cvoid}
# ulCompletionKey : UINT_PTR optional -> Csize_t
# phContentInfo : INT_PTR* out -> Ptr{Int}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t PeerDistServerOpenContentInformationEx(
    intptr_t hPeerDist,
    uint32_t cbContentIdentifier,
    uint8_t* pContentIdentifier,
    uint64_t ullContentOffset,
    uint64_t cbContentLength,
    void* pRetrievalOptions,
    void* hCompletionPort,
    uintptr_t ulCompletionKey,
    intptr_t* phContentInfo);
]]
local peerdist = ffi.load("peerdist")
-- peerdist.PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)
-- hPeerDist : INT_PTR
-- cbContentIdentifier : DWORD
-- pContentIdentifier : BYTE*
-- ullContentOffset : ULONGLONG
-- cbContentLength : ULONGLONG
-- pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*
-- hCompletionPort : HANDLE optional
-- ulCompletionKey : UINT_PTR optional
-- phContentInfo : INT_PTR* 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('PeerDist.dll');
const PeerDistServerOpenContentInformationEx = lib.func('__stdcall', 'PeerDistServerOpenContentInformationEx', 'uint32_t', ['intptr_t', 'uint32_t', 'uint8_t *', 'uint64_t', 'uint64_t', 'void *', 'void *', 'uintptr_t', 'intptr_t *']);
// PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)
// hPeerDist : INT_PTR -> 'intptr_t'
// cbContentIdentifier : DWORD -> 'uint32_t'
// pContentIdentifier : BYTE* -> 'uint8_t *'
// ullContentOffset : ULONGLONG -> 'uint64_t'
// cbContentLength : ULONGLONG -> 'uint64_t'
// pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> 'void *'
// hCompletionPort : HANDLE optional -> 'void *'
// ulCompletionKey : UINT_PTR optional -> 'uintptr_t'
// phContentInfo : INT_PTR* out -> 'intptr_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("PeerDist.dll", {
  PeerDistServerOpenContentInformationEx: { parameters: ["isize", "u32", "pointer", "u64", "u64", "pointer", "pointer", "usize", "pointer"], result: "u32" },
});
// lib.symbols.PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo)
// hPeerDist : INT_PTR -> "isize"
// cbContentIdentifier : DWORD -> "u32"
// pContentIdentifier : BYTE* -> "pointer"
// ullContentOffset : ULONGLONG -> "u64"
// cbContentLength : ULONGLONG -> "u64"
// pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> "pointer"
// hCompletionPort : HANDLE optional -> "pointer"
// ulCompletionKey : UINT_PTR optional -> "usize"
// phContentInfo : INT_PTR* 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
uint32_t PeerDistServerOpenContentInformationEx(
    intptr_t hPeerDist,
    uint32_t cbContentIdentifier,
    uint8_t* pContentIdentifier,
    uint64_t ullContentOffset,
    uint64_t cbContentLength,
    void* pRetrievalOptions,
    void* hCompletionPort,
    size_t ulCompletionKey,
    intptr_t* phContentInfo);
C, "PeerDist.dll");
// $ffi->PeerDistServerOpenContentInformationEx(hPeerDist, cbContentIdentifier, pContentIdentifier, ullContentOffset, cbContentLength, pRetrievalOptions, hCompletionPort, ulCompletionKey, phContentInfo);
// hPeerDist : INT_PTR
// cbContentIdentifier : DWORD
// pContentIdentifier : BYTE*
// ullContentOffset : ULONGLONG
// cbContentLength : ULONGLONG
// pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*
// hCompletionPort : HANDLE optional
// ulCompletionKey : UINT_PTR optional
// phContentInfo : INT_PTR* 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 Peerdist extends StdCallLibrary {
    Peerdist INSTANCE = Native.load("peerdist", Peerdist.class);
    int PeerDistServerOpenContentInformationEx(
        long hPeerDist,   // INT_PTR
        int cbContentIdentifier,   // DWORD
        byte[] pContentIdentifier,   // BYTE*
        long ullContentOffset,   // ULONGLONG
        long cbContentLength,   // ULONGLONG
        Pointer pRetrievalOptions,   // PEERDIST_RETRIEVAL_OPTIONS*
        Pointer hCompletionPort,   // HANDLE optional
        long ulCompletionKey,   // UINT_PTR optional
        LongByReference phContentInfo   // INT_PTR* out
    );
}

@[Link("peerdist")]
lib LibPeerDist
  fun PeerDistServerOpenContentInformationEx = PeerDistServerOpenContentInformationEx(
    hPeerDist : LibC::SSizeT,   # INT_PTR
    cbContentIdentifier : UInt32,   # DWORD
    pContentIdentifier : UInt8*,   # BYTE*
    ullContentOffset : UInt64,   # ULONGLONG
    cbContentLength : UInt64,   # ULONGLONG
    pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS*,   # PEERDIST_RETRIEVAL_OPTIONS*
    hCompletionPort : Void*,   # HANDLE optional
    ulCompletionKey : LibC::SizeT,   # UINT_PTR optional
    phContentInfo : LibC::SSizeT*   # INT_PTR* out
  ) : UInt32
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 PeerDistServerOpenContentInformationExNative = Uint32 Function(IntPtr, Uint32, Pointer<Uint8>, Uint64, Uint64, Pointer<Void>, Pointer<Void>, UintPtr, Pointer<IntPtr>);
typedef PeerDistServerOpenContentInformationExDart = int Function(int, int, Pointer<Uint8>, int, int, Pointer<Void>, Pointer<Void>, int, Pointer<IntPtr>);
final PeerDistServerOpenContentInformationEx = DynamicLibrary.open('PeerDist.dll')
    .lookupFunction<PeerDistServerOpenContentInformationExNative, PeerDistServerOpenContentInformationExDart>('PeerDistServerOpenContentInformationEx');
// hPeerDist : INT_PTR -> IntPtr
// cbContentIdentifier : DWORD -> Uint32
// pContentIdentifier : BYTE* -> Pointer<Uint8>
// ullContentOffset : ULONGLONG -> Uint64
// cbContentLength : ULONGLONG -> Uint64
// pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> Pointer<Void>
// hCompletionPort : HANDLE optional -> Pointer<Void>
// ulCompletionKey : UINT_PTR optional -> UintPtr
// phContentInfo : INT_PTR* out -> Pointer<IntPtr>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function PeerDistServerOpenContentInformationEx(
  hPeerDist: NativeInt;   // INT_PTR
  cbContentIdentifier: DWORD;   // DWORD
  pContentIdentifier: Pointer;   // BYTE*
  ullContentOffset: UInt64;   // ULONGLONG
  cbContentLength: UInt64;   // ULONGLONG
  pRetrievalOptions: Pointer;   // PEERDIST_RETRIEVAL_OPTIONS*
  hCompletionPort: THandle;   // HANDLE optional
  ulCompletionKey: NativeUInt;   // UINT_PTR optional
  phContentInfo: Pointer   // INT_PTR* out
): DWORD; stdcall;
  external 'PeerDist.dll' name 'PeerDistServerOpenContentInformationEx';

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

foreign import stdcall safe "PeerDistServerOpenContentInformationEx"
  c_PeerDistServerOpenContentInformationEx :: CIntPtr -> Word32 -> Ptr Word8 -> Word64 -> Word64 -> Ptr () -> Ptr () -> CUIntPtr -> Ptr CIntPtr -> IO Word32
-- hPeerDist : INT_PTR -> CIntPtr
-- cbContentIdentifier : DWORD -> Word32
-- pContentIdentifier : BYTE* -> Ptr Word8
-- ullContentOffset : ULONGLONG -> Word64
-- cbContentLength : ULONGLONG -> Word64
-- pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> Ptr ()
-- hCompletionPort : HANDLE optional -> Ptr ()
-- ulCompletionKey : UINT_PTR optional -> CUIntPtr
-- phContentInfo : INT_PTR* out -> Ptr CIntPtr
-- 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 peerdistserveropencontentinformationex =
  foreign "PeerDistServerOpenContentInformationEx"
    (intptr_t @-> uint32_t @-> (ptr uint8_t) @-> uint64_t @-> uint64_t @-> (ptr void) @-> (ptr void) @-> size_t @-> (ptr intptr_t) @-> returning uint32_t)
(* hPeerDist : INT_PTR -> intptr_t *)
(* cbContentIdentifier : DWORD -> uint32_t *)
(* pContentIdentifier : BYTE* -> (ptr uint8_t) *)
(* ullContentOffset : ULONGLONG -> uint64_t *)
(* cbContentLength : ULONGLONG -> uint64_t *)
(* pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> (ptr void) *)
(* hCompletionPort : HANDLE optional -> (ptr void) *)
(* ulCompletionKey : UINT_PTR optional -> size_t *)
(* phContentInfo : INT_PTR* out -> (ptr intptr_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 peerdist (t "PeerDist.dll"))
(cffi:use-foreign-library peerdist)

(cffi:defcfun ("PeerDistServerOpenContentInformationEx" peer-dist-server-open-content-information-ex :convention :stdcall) :uint32
  (h-peer-dist :int64)   ; INT_PTR
  (cb-content-identifier :uint32)   ; DWORD
  (p-content-identifier :pointer)   ; BYTE*
  (ull-content-offset :uint64)   ; ULONGLONG
  (cb-content-length :uint64)   ; ULONGLONG
  (p-retrieval-options :pointer)   ; PEERDIST_RETRIEVAL_OPTIONS*
  (h-completion-port :pointer)   ; HANDLE optional
  (ul-completion-key :uint64)   ; UINT_PTR optional
  (ph-content-info :pointer))   ; INT_PTR* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $PeerDistServerOpenContentInformationEx = Win32::API::More->new('PeerDist',
    'DWORD PeerDistServerOpenContentInformationEx(LPARAM hPeerDist, DWORD cbContentIdentifier, LPVOID pContentIdentifier, UINT64 ullContentOffset, UINT64 cbContentLength, LPVOID pRetrievalOptions, HANDLE hCompletionPort, WPARAM ulCompletionKey, LPVOID phContentInfo)');
# my $ret = $PeerDistServerOpenContentInformationEx->Call($hPeerDist, $cbContentIdentifier, $pContentIdentifier, $ullContentOffset, $cbContentLength, $pRetrievalOptions, $hCompletionPort, $ulCompletionKey, $phContentInfo);
# hPeerDist : INT_PTR -> LPARAM
# cbContentIdentifier : DWORD -> DWORD
# pContentIdentifier : BYTE* -> LPVOID
# ullContentOffset : ULONGLONG -> UINT64
# cbContentLength : ULONGLONG -> UINT64
# pRetrievalOptions : PEERDIST_RETRIEVAL_OPTIONS* -> LPVOID
# hCompletionPort : HANDLE optional -> HANDLE
# ulCompletionKey : UINT_PTR optional -> WPARAM
# phContentInfo : INT_PTR* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。