HttpFilterProc

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

DWORD HttpFilterProc(
    HTTP_FILTER_CONTEXT* pfc,
    DWORD NotificationType,
    void* pvNotification
);

<DllImport("RpcProxy.dll", ExactSpelling:=True)>
Public Shared Function HttpFilterProc(
    pfc As IntPtr,   ' HTTP_FILTER_CONTEXT* in/out
    NotificationType As UInteger,   ' DWORD
    pvNotification As IntPtr   ' void* in/out
) As UInteger
End Function

' pfc : HTTP_FILTER_CONTEXT* in/out
' NotificationType : DWORD
' pvNotification : void* in/out
Declare PtrSafe Function HttpFilterProc Lib "rpcproxy" ( _
    ByVal pfc As LongPtr, _
    ByVal NotificationType As Long, _
    ByVal pvNotification 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

HttpFilterProc = ctypes.windll.rpcproxy.HttpFilterProc
HttpFilterProc.restype = wintypes.DWORD
HttpFilterProc.argtypes = [
    ctypes.c_void_p,  # pfc : HTTP_FILTER_CONTEXT* in/out
    wintypes.DWORD,  # NotificationType : DWORD
    ctypes.POINTER(None),  # pvNotification : void* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RpcProxy.dll')
HttpFilterProc = Fiddle::Function.new(
  lib['HttpFilterProc'],
  [
    Fiddle::TYPE_VOIDP,  # pfc : HTTP_FILTER_CONTEXT* in/out
    -Fiddle::TYPE_INT,  # NotificationType : DWORD
    Fiddle::TYPE_VOIDP,  # pvNotification : void* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rpcproxy")]
extern "system" {
    fn HttpFilterProc(
        pfc: *mut HTTP_FILTER_CONTEXT,  // HTTP_FILTER_CONTEXT* in/out
        NotificationType: u32,  // DWORD
        pvNotification: *mut ()  // void* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RpcProxy.dll")]
public static extern uint HttpFilterProc(IntPtr pfc, uint NotificationType, IntPtr pvNotification);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RpcProxy_HttpFilterProc' -Namespace Win32 -PassThru
# $api::HttpFilterProc(pfc, NotificationType, pvNotification)

#uselib "RpcProxy.dll"
#func global HttpFilterProc "HttpFilterProc" sptr, sptr, sptr
; HttpFilterProc varptr(pfc), NotificationType, pvNotification   ; 戻り値は stat
; pfc : HTTP_FILTER_CONTEXT* in/out -> "sptr"
; NotificationType : DWORD -> "sptr"
; pvNotification : void* in/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 (
	rpcproxy = windows.NewLazySystemDLL("RpcProxy.dll")
	procHttpFilterProc = rpcproxy.NewProc("HttpFilterProc")
)

// pfc (HTTP_FILTER_CONTEXT* in/out), NotificationType (DWORD), pvNotification (void* in/out)
r1, _, err := procHttpFilterProc.Call(
	uintptr(pfc),
	uintptr(NotificationType),
	uintptr(pvNotification),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function HttpFilterProc(
  pfc: Pointer;   // HTTP_FILTER_CONTEXT* in/out
  NotificationType: DWORD;   // DWORD
  pvNotification: Pointer   // void* in/out
): DWORD; stdcall;
  external 'RpcProxy.dll' name 'HttpFilterProc';

result := DllCall("RpcProxy\HttpFilterProc"
    , "Ptr", pfc   ; HTTP_FILTER_CONTEXT* in/out
    , "UInt", NotificationType   ; DWORD
    , "Ptr", pvNotification   ; void* in/out
    , "UInt")   ; return: DWORD

●HttpFilterProc(pfc, NotificationType, pvNotification) = DLL("RpcProxy.dll", "dword HttpFilterProc(void*, dword, void*)")
# 呼び出し: HttpFilterProc(pfc, NotificationType, pvNotification)
# pfc : HTTP_FILTER_CONTEXT* in/out -> "void*"
# NotificationType : DWORD -> "dword"
# pvNotification : void* in/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 "rpcproxy" fn HttpFilterProc(
    pfc: [*c]HTTP_FILTER_CONTEXT, // HTTP_FILTER_CONTEXT* in/out
    NotificationType: u32, // DWORD
    pvNotification: ?*anyopaque // void* in/out
) callconv(std.os.windows.WINAPI) u32;

proc HttpFilterProc(
    pfc: ptr HTTP_FILTER_CONTEXT,  # HTTP_FILTER_CONTEXT* in/out
    NotificationType: uint32,  # DWORD
    pvNotification: pointer  # void* in/out
): uint32 {.importc: "HttpFilterProc", stdcall, dynlib: "RpcProxy.dll".}

pragma(lib, "rpcproxy");
extern(Windows)
uint HttpFilterProc(
    HTTP_FILTER_CONTEXT* pfc,   // HTTP_FILTER_CONTEXT* in/out
    uint NotificationType,   // DWORD
    void* pvNotification   // void* in/out
);

ccall((:HttpFilterProc, "RpcProxy.dll"), stdcall, UInt32,
      (Ptr{HTTP_FILTER_CONTEXT}, UInt32, Ptr{Cvoid}),
      pfc, NotificationType, pvNotification)
# pfc : HTTP_FILTER_CONTEXT* in/out -> Ptr{HTTP_FILTER_CONTEXT}
# NotificationType : DWORD -> UInt32
# pvNotification : void* in/out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t HttpFilterProc(
    void* pfc,
    uint32_t NotificationType,
    void* pvNotification);
]]
local rpcproxy = ffi.load("rpcproxy")
-- rpcproxy.HttpFilterProc(pfc, NotificationType, pvNotification)
-- pfc : HTTP_FILTER_CONTEXT* in/out
-- NotificationType : DWORD
-- pvNotification : void* in/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('RpcProxy.dll');
const HttpFilterProc = lib.func('__stdcall', 'HttpFilterProc', 'uint32_t', ['void *', 'uint32_t', 'void *']);
// HttpFilterProc(pfc, NotificationType, pvNotification)
// pfc : HTTP_FILTER_CONTEXT* in/out -> 'void *'
// NotificationType : DWORD -> 'uint32_t'
// pvNotification : void* in/out -> 'void *'
// 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("RpcProxy.dll", {
  HttpFilterProc: { parameters: ["pointer", "u32", "pointer"], result: "u32" },
});
// lib.symbols.HttpFilterProc(pfc, NotificationType, pvNotification)
// pfc : HTTP_FILTER_CONTEXT* in/out -> "pointer"
// NotificationType : DWORD -> "u32"
// pvNotification : void* in/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 HttpFilterProc(
    void* pfc,
    uint32_t NotificationType,
    void* pvNotification);
C, "RpcProxy.dll");
// $ffi->HttpFilterProc(pfc, NotificationType, pvNotification);
// pfc : HTTP_FILTER_CONTEXT* in/out
// NotificationType : DWORD
// pvNotification : void* in/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 Rpcproxy extends StdCallLibrary {
    Rpcproxy INSTANCE = Native.load("rpcproxy", Rpcproxy.class);
    int HttpFilterProc(
        Pointer pfc,   // HTTP_FILTER_CONTEXT* in/out
        int NotificationType,   // DWORD
        Pointer pvNotification   // void* in/out
    );
}

@[Link("rpcproxy")]
lib LibRpcProxy
  fun HttpFilterProc = HttpFilterProc(
    pfc : HTTP_FILTER_CONTEXT*,   # HTTP_FILTER_CONTEXT* in/out
    NotificationType : UInt32,   # DWORD
    pvNotification : Void*   # void* in/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 HttpFilterProcNative = Uint32 Function(Pointer<Void>, Uint32, Pointer<Void>);
typedef HttpFilterProcDart = int Function(Pointer<Void>, int, Pointer<Void>);
final HttpFilterProc = DynamicLibrary.open('RpcProxy.dll')
    .lookupFunction<HttpFilterProcNative, HttpFilterProcDart>('HttpFilterProc');
// pfc : HTTP_FILTER_CONTEXT* in/out -> Pointer<Void>
// NotificationType : DWORD -> Uint32
// pvNotification : void* in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function HttpFilterProc(
  pfc: Pointer;   // HTTP_FILTER_CONTEXT* in/out
  NotificationType: DWORD;   // DWORD
  pvNotification: Pointer   // void* in/out
): DWORD; stdcall;
  external 'RpcProxy.dll' name 'HttpFilterProc';

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

foreign import stdcall safe "HttpFilterProc"
  c_HttpFilterProc :: Ptr () -> Word32 -> Ptr () -> IO Word32
-- pfc : HTTP_FILTER_CONTEXT* in/out -> Ptr ()
-- NotificationType : DWORD -> Word32
-- pvNotification : void* in/out -> Ptr ()
-- 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 httpfilterproc =
  foreign "HttpFilterProc"
    ((ptr void) @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* pfc : HTTP_FILTER_CONTEXT* in/out -> (ptr void) *)
(* NotificationType : DWORD -> uint32_t *)
(* pvNotification : void* in/out -> (ptr void) *)
(* 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 rpcproxy (t "RpcProxy.dll"))
(cffi:use-foreign-library rpcproxy)

(cffi:defcfun ("HttpFilterProc" http-filter-proc :convention :stdcall) :uint32
  (pfc :pointer)   ; HTTP_FILTER_CONTEXT* in/out
  (notification-type :uint32)   ; DWORD
  (pv-notification :pointer))   ; void* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $HttpFilterProc = Win32::API::More->new('RpcProxy',
    'DWORD HttpFilterProc(LPVOID pfc, DWORD NotificationType, LPVOID pvNotification)');
# my $ret = $HttpFilterProc->Call($pfc, $NotificationType, $pvNotification);
# pfc : HTTP_FILTER_CONTEXT* in/out -> LPVOID
# NotificationType : DWORD -> DWORD
# pvNotification : void* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。