SnmpRecvMsg

// wsnmp32.dll
#include <windows.h>

DWORD SnmpRecvMsg(
    INT_PTR session,
    INT_PTR* srcEntity,
    INT_PTR* dstEntity,
    INT_PTR* context,
    INT_PTR* PDU
);

<DllImport("wsnmp32.dll", ExactSpelling:=True)>
Public Shared Function SnmpRecvMsg(
    session As IntPtr,   ' INT_PTR
    ByRef srcEntity As IntPtr,   ' INT_PTR* in/out
    ByRef dstEntity As IntPtr,   ' INT_PTR* in/out
    ByRef context As IntPtr,   ' INT_PTR* in/out
    ByRef PDU As IntPtr   ' INT_PTR* in/out
) As UInteger
End Function

' session : INT_PTR
' srcEntity : INT_PTR* in/out
' dstEntity : INT_PTR* in/out
' context : INT_PTR* in/out
' PDU : INT_PTR* in/out
Declare PtrSafe Function SnmpRecvMsg Lib "wsnmp32" ( _
    ByVal session As LongPtr, _
    ByRef srcEntity As LongPtr, _
    ByRef dstEntity As LongPtr, _
    ByRef context As LongPtr, _
    ByRef PDU 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

SnmpRecvMsg = ctypes.windll.wsnmp32.SnmpRecvMsg
SnmpRecvMsg.restype = wintypes.DWORD
SnmpRecvMsg.argtypes = [
    ctypes.c_ssize_t,  # session : INT_PTR
    ctypes.POINTER(ctypes.c_ssize_t),  # srcEntity : INT_PTR* in/out
    ctypes.POINTER(ctypes.c_ssize_t),  # dstEntity : INT_PTR* in/out
    ctypes.POINTER(ctypes.c_ssize_t),  # context : INT_PTR* in/out
    ctypes.POINTER(ctypes.c_ssize_t),  # PDU : INT_PTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wsnmp32.dll')
SnmpRecvMsg = Fiddle::Function.new(
  lib['SnmpRecvMsg'],
  [
    Fiddle::TYPE_INTPTR_T,  # session : INT_PTR
    Fiddle::TYPE_VOIDP,  # srcEntity : INT_PTR* in/out
    Fiddle::TYPE_VOIDP,  # dstEntity : INT_PTR* in/out
    Fiddle::TYPE_VOIDP,  # context : INT_PTR* in/out
    Fiddle::TYPE_VOIDP,  # PDU : INT_PTR* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wsnmp32")]
extern "system" {
    fn SnmpRecvMsg(
        session: isize,  // INT_PTR
        srcEntity: *mut isize,  // INT_PTR* in/out
        dstEntity: *mut isize,  // INT_PTR* in/out
        context: *mut isize,  // INT_PTR* in/out
        PDU: *mut isize  // INT_PTR* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wsnmp32.dll")]
public static extern uint SnmpRecvMsg(IntPtr session, ref IntPtr srcEntity, ref IntPtr dstEntity, ref IntPtr context, ref IntPtr PDU);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wsnmp32_SnmpRecvMsg' -Namespace Win32 -PassThru
# $api::SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU)

#uselib "wsnmp32.dll"
#func global SnmpRecvMsg "SnmpRecvMsg" sptr, sptr, sptr, sptr, sptr
; SnmpRecvMsg session, varptr(srcEntity), varptr(dstEntity), varptr(context), varptr(PDU)   ; 戻り値は stat
; session : INT_PTR -> "sptr"
; srcEntity : INT_PTR* in/out -> "sptr"
; dstEntity : INT_PTR* in/out -> "sptr"
; context : INT_PTR* in/out -> "sptr"
; PDU : INT_PTR* 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 (
	wsnmp32 = windows.NewLazySystemDLL("wsnmp32.dll")
	procSnmpRecvMsg = wsnmp32.NewProc("SnmpRecvMsg")
)

// session (INT_PTR), srcEntity (INT_PTR* in/out), dstEntity (INT_PTR* in/out), context (INT_PTR* in/out), PDU (INT_PTR* in/out)
r1, _, err := procSnmpRecvMsg.Call(
	uintptr(session),
	uintptr(srcEntity),
	uintptr(dstEntity),
	uintptr(context),
	uintptr(PDU),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SnmpRecvMsg(
  session: NativeInt;   // INT_PTR
  srcEntity: Pointer;   // INT_PTR* in/out
  dstEntity: Pointer;   // INT_PTR* in/out
  context: Pointer;   // INT_PTR* in/out
  PDU: Pointer   // INT_PTR* in/out
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpRecvMsg';

result := DllCall("wsnmp32\SnmpRecvMsg"
    , "Ptr", session   ; INT_PTR
    , "Ptr", srcEntity   ; INT_PTR* in/out
    , "Ptr", dstEntity   ; INT_PTR* in/out
    , "Ptr", context   ; INT_PTR* in/out
    , "Ptr", PDU   ; INT_PTR* in/out
    , "UInt")   ; return: DWORD

●SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU) = DLL("wsnmp32.dll", "dword SnmpRecvMsg(int, void*, void*, void*, void*)")
# 呼び出し: SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU)
# session : INT_PTR -> "int"
# srcEntity : INT_PTR* in/out -> "void*"
# dstEntity : INT_PTR* in/out -> "void*"
# context : INT_PTR* in/out -> "void*"
# PDU : INT_PTR* 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 "wsnmp32" fn SnmpRecvMsg(
    session: isize, // INT_PTR
    srcEntity: [*c]isize, // INT_PTR* in/out
    dstEntity: [*c]isize, // INT_PTR* in/out
    context: [*c]isize, // INT_PTR* in/out
    PDU: [*c]isize // INT_PTR* in/out
) callconv(std.os.windows.WINAPI) u32;

proc SnmpRecvMsg(
    session: int,  # INT_PTR
    srcEntity: ptr int,  # INT_PTR* in/out
    dstEntity: ptr int,  # INT_PTR* in/out
    context: ptr int,  # INT_PTR* in/out
    PDU: ptr int  # INT_PTR* in/out
): uint32 {.importc: "SnmpRecvMsg", stdcall, dynlib: "wsnmp32.dll".}

pragma(lib, "wsnmp32");
extern(Windows)
uint SnmpRecvMsg(
    ptrdiff_t session,   // INT_PTR
    ptrdiff_t* srcEntity,   // INT_PTR* in/out
    ptrdiff_t* dstEntity,   // INT_PTR* in/out
    ptrdiff_t* context,   // INT_PTR* in/out
    ptrdiff_t* PDU   // INT_PTR* in/out
);

ccall((:SnmpRecvMsg, "wsnmp32.dll"), stdcall, UInt32,
      (Int, Ptr{Int}, Ptr{Int}, Ptr{Int}, Ptr{Int}),
      session, srcEntity, dstEntity, context, PDU)
# session : INT_PTR -> Int
# srcEntity : INT_PTR* in/out -> Ptr{Int}
# dstEntity : INT_PTR* in/out -> Ptr{Int}
# context : INT_PTR* in/out -> Ptr{Int}
# PDU : INT_PTR* in/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 SnmpRecvMsg(
    intptr_t session,
    intptr_t* srcEntity,
    intptr_t* dstEntity,
    intptr_t* context,
    intptr_t* PDU);
]]
local wsnmp32 = ffi.load("wsnmp32")
-- wsnmp32.SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU)
-- session : INT_PTR
-- srcEntity : INT_PTR* in/out
-- dstEntity : INT_PTR* in/out
-- context : INT_PTR* in/out
-- PDU : INT_PTR* 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('wsnmp32.dll');
const SnmpRecvMsg = lib.func('__stdcall', 'SnmpRecvMsg', 'uint32_t', ['intptr_t', 'intptr_t *', 'intptr_t *', 'intptr_t *', 'intptr_t *']);
// SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU)
// session : INT_PTR -> 'intptr_t'
// srcEntity : INT_PTR* in/out -> 'intptr_t *'
// dstEntity : INT_PTR* in/out -> 'intptr_t *'
// context : INT_PTR* in/out -> 'intptr_t *'
// PDU : INT_PTR* in/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("wsnmp32.dll", {
  SnmpRecvMsg: { parameters: ["isize", "pointer", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU)
// session : INT_PTR -> "isize"
// srcEntity : INT_PTR* in/out -> "pointer"
// dstEntity : INT_PTR* in/out -> "pointer"
// context : INT_PTR* in/out -> "pointer"
// PDU : INT_PTR* 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 SnmpRecvMsg(
    intptr_t session,
    intptr_t* srcEntity,
    intptr_t* dstEntity,
    intptr_t* context,
    intptr_t* PDU);
C, "wsnmp32.dll");
// $ffi->SnmpRecvMsg(session, srcEntity, dstEntity, context, PDU);
// session : INT_PTR
// srcEntity : INT_PTR* in/out
// dstEntity : INT_PTR* in/out
// context : INT_PTR* in/out
// PDU : INT_PTR* 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 Wsnmp32 extends StdCallLibrary {
    Wsnmp32 INSTANCE = Native.load("wsnmp32", Wsnmp32.class);
    int SnmpRecvMsg(
        long session,   // INT_PTR
        LongByReference srcEntity,   // INT_PTR* in/out
        LongByReference dstEntity,   // INT_PTR* in/out
        LongByReference context,   // INT_PTR* in/out
        LongByReference PDU   // INT_PTR* in/out
    );
}

@[Link("wsnmp32")]
lib Libwsnmp32
  fun SnmpRecvMsg = SnmpRecvMsg(
    session : LibC::SSizeT,   # INT_PTR
    srcEntity : LibC::SSizeT*,   # INT_PTR* in/out
    dstEntity : LibC::SSizeT*,   # INT_PTR* in/out
    context : LibC::SSizeT*,   # INT_PTR* in/out
    PDU : LibC::SSizeT*   # INT_PTR* 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 SnmpRecvMsgNative = Uint32 Function(IntPtr, Pointer<IntPtr>, Pointer<IntPtr>, Pointer<IntPtr>, Pointer<IntPtr>);
typedef SnmpRecvMsgDart = int Function(int, Pointer<IntPtr>, Pointer<IntPtr>, Pointer<IntPtr>, Pointer<IntPtr>);
final SnmpRecvMsg = DynamicLibrary.open('wsnmp32.dll')
    .lookupFunction<SnmpRecvMsgNative, SnmpRecvMsgDart>('SnmpRecvMsg');
// session : INT_PTR -> IntPtr
// srcEntity : INT_PTR* in/out -> Pointer<IntPtr>
// dstEntity : INT_PTR* in/out -> Pointer<IntPtr>
// context : INT_PTR* in/out -> Pointer<IntPtr>
// PDU : INT_PTR* in/out -> Pointer<IntPtr>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SnmpRecvMsg(
  session: NativeInt;   // INT_PTR
  srcEntity: Pointer;   // INT_PTR* in/out
  dstEntity: Pointer;   // INT_PTR* in/out
  context: Pointer;   // INT_PTR* in/out
  PDU: Pointer   // INT_PTR* in/out
): DWORD; stdcall;
  external 'wsnmp32.dll' name 'SnmpRecvMsg';

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

foreign import stdcall safe "SnmpRecvMsg"
  c_SnmpRecvMsg :: CIntPtr -> Ptr CIntPtr -> Ptr CIntPtr -> Ptr CIntPtr -> Ptr CIntPtr -> IO Word32
-- session : INT_PTR -> CIntPtr
-- srcEntity : INT_PTR* in/out -> Ptr CIntPtr
-- dstEntity : INT_PTR* in/out -> Ptr CIntPtr
-- context : INT_PTR* in/out -> Ptr CIntPtr
-- PDU : INT_PTR* in/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 snmprecvmsg =
  foreign "SnmpRecvMsg"
    (intptr_t @-> (ptr intptr_t) @-> (ptr intptr_t) @-> (ptr intptr_t) @-> (ptr intptr_t) @-> returning uint32_t)
(* session : INT_PTR -> intptr_t *)
(* srcEntity : INT_PTR* in/out -> (ptr intptr_t) *)
(* dstEntity : INT_PTR* in/out -> (ptr intptr_t) *)
(* context : INT_PTR* in/out -> (ptr intptr_t) *)
(* PDU : INT_PTR* in/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 wsnmp32 (t "wsnmp32.dll"))
(cffi:use-foreign-library wsnmp32)

(cffi:defcfun ("SnmpRecvMsg" snmp-recv-msg :convention :stdcall) :uint32
  (session :int64)   ; INT_PTR
  (src-entity :pointer)   ; INT_PTR* in/out
  (dst-entity :pointer)   ; INT_PTR* in/out
  (context :pointer)   ; INT_PTR* in/out
  (pdu :pointer))   ; INT_PTR* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SnmpRecvMsg = Win32::API::More->new('wsnmp32',
    'DWORD SnmpRecvMsg(LPARAM session, LPVOID srcEntity, LPVOID dstEntity, LPVOID context, LPVOID PDU)');
# my $ret = $SnmpRecvMsg->Call($session, $srcEntity, $dstEntity, $context, $PDU);
# session : INT_PTR -> LPARAM
# srcEntity : INT_PTR* in/out -> LPVOID
# dstEntity : INT_PTR* in/out -> LPVOID
# context : INT_PTR* in/out -> LPVOID
# PDU : INT_PTR* 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。