JsGetExternalData

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

JsErrorCode JsGetExternalData(
    void* object,
    void** externalData
);

<DllImport("chakra.dll", ExactSpelling:=True)>
Public Shared Function JsGetExternalData(
    [object] As IntPtr,   ' void*
    externalData As IntPtr   ' void** out
) As UInteger
End Function

' object : void*
' externalData : void** out
Declare PtrSafe Function JsGetExternalData Lib "chakra" ( _
    ByVal object As LongPtr, _
    ByVal externalData 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

JsGetExternalData = ctypes.windll.chakra.JsGetExternalData
JsGetExternalData.restype = wintypes.DWORD
JsGetExternalData.argtypes = [
    ctypes.POINTER(None),  # object : void*
    ctypes.c_void_p,  # externalData : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('chakra.dll')
JsGetExternalData = Fiddle::Function.new(
  lib['JsGetExternalData'],
  [
    Fiddle::TYPE_VOIDP,  # object : void*
    Fiddle::TYPE_VOIDP,  # externalData : void** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "chakra")]
extern "system" {
    fn JsGetExternalData(
        object: *mut (),  // void*
        externalData: *mut *mut ()  // void** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("chakra.dll")]
public static extern uint JsGetExternalData(IntPtr object, IntPtr externalData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'chakra_JsGetExternalData' -Namespace Win32 -PassThru
# $api::JsGetExternalData(object, externalData)

#uselib "chakra.dll"
#func global JsGetExternalData "JsGetExternalData" sptr, sptr
; JsGetExternalData object, externalData   ; 戻り値は stat
; object : void* -> "sptr"
; externalData : void** 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。

#uselib "chakra.dll"
#cfunc global JsGetExternalData "JsGetExternalData" sptr, sptr
; res = JsGetExternalData(object, externalData)
; object : void* -> "sptr"
; externalData : void** out -> "sptr"

; JsErrorCode JsGetExternalData(void* object, void** externalData)
#uselib "chakra.dll"
#cfunc global JsGetExternalData "JsGetExternalData" intptr, intptr
; res = JsGetExternalData(object, externalData)
; object : void* -> "intptr"
; externalData : void** out -> "intptr"

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

var (
	chakra = windows.NewLazySystemDLL("chakra.dll")
	procJsGetExternalData = chakra.NewProc("JsGetExternalData")
)

// object (void*), externalData (void** out)
r1, _, err := procJsGetExternalData.Call(
	uintptr(object),
	uintptr(externalData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // JsErrorCode

function JsGetExternalData(
  object: Pointer;   // void*
  externalData: Pointer   // void** out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsGetExternalData';

result := DllCall("chakra\JsGetExternalData"
    , "Ptr", object   ; void*
    , "Ptr", externalData   ; void** out
    , "UInt")   ; return: JsErrorCode

●JsGetExternalData(object, externalData) = DLL("chakra.dll", "dword JsGetExternalData(void*, void*)")
# 呼び出し: JsGetExternalData(object, externalData)
# object : void* -> "void*"
# externalData : void** 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 "chakra" fn JsGetExternalData(
    object: ?*anyopaque, // void*
    externalData: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) u32;

proc JsGetExternalData(
    `object`: pointer,  # void*
    externalData: pointer  # void** out
): uint32 {.importc: "JsGetExternalData", stdcall, dynlib: "chakra.dll".}

pragma(lib, "chakra");
extern(Windows)
uint JsGetExternalData(
    void* object,   // void*
    void** externalData   // void** out
);

ccall((:JsGetExternalData, "chakra.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Ptr{Cvoid}),
      object, externalData)
# object : void* -> Ptr{Cvoid}
# externalData : void** 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 JsGetExternalData(
    void* object,
    void** externalData);
]]
local chakra = ffi.load("chakra")
-- chakra.JsGetExternalData(object, externalData)
-- object : void*
-- externalData : void** 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('chakra.dll');
const JsGetExternalData = lib.func('__stdcall', 'JsGetExternalData', 'uint32_t', ['void *', 'void *']);
// JsGetExternalData(object, externalData)
// object : void* -> 'void *'
// externalData : void** 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("chakra.dll", {
  JsGetExternalData: { parameters: ["pointer", "pointer"], result: "u32" },
});
// lib.symbols.JsGetExternalData(object, externalData)
// object : void* -> "pointer"
// externalData : void** 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 JsGetExternalData(
    void* object,
    void** externalData);
C, "chakra.dll");
// $ffi->JsGetExternalData(object, externalData);
// object : void*
// externalData : void** 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 Chakra extends StdCallLibrary {
    Chakra INSTANCE = Native.load("chakra", Chakra.class);
    int JsGetExternalData(
        Pointer object,   // void*
        Pointer externalData   // void** out
    );
}

@[Link("chakra")]
lib Libchakra
  fun JsGetExternalData = JsGetExternalData(
    object : Void*,   # void*
    externalData : Void**   # void** 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 JsGetExternalDataNative = Uint32 Function(Pointer<Void>, Pointer<Void>);
typedef JsGetExternalDataDart = int Function(Pointer<Void>, Pointer<Void>);
final JsGetExternalData = DynamicLibrary.open('chakra.dll')
    .lookupFunction<JsGetExternalDataNative, JsGetExternalDataDart>('JsGetExternalData');
// object : void* -> Pointer<Void>
// externalData : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function JsGetExternalData(
  object: Pointer;   // void*
  externalData: Pointer   // void** out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsGetExternalData';

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

foreign import stdcall safe "JsGetExternalData"
  c_JsGetExternalData :: Ptr () -> Ptr () -> IO Word32
-- object : void* -> Ptr ()
-- externalData : void** 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 jsgetexternaldata =
  foreign "JsGetExternalData"
    ((ptr void) @-> (ptr void) @-> returning uint32_t)
(* object : void* -> (ptr void) *)
(* externalData : void** 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 chakra (t "chakra.dll"))
(cffi:use-foreign-library chakra)

(cffi:defcfun ("JsGetExternalData" js-get-external-data :convention :stdcall) :uint32
  (object :pointer)   ; void*
  (external-data :pointer))   ; void** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $JsGetExternalData = Win32::API::More->new('chakra',
    'DWORD JsGetExternalData(LPVOID object, LPVOID externalData)');
# my $ret = $JsGetExternalData->Call($object, $externalData);
# object : void* -> LPVOID
# externalData : void** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。