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ホームSystem.Rpc › IUnknown_QueryInterface_Proxy

IUnknown_QueryInterface_Proxy

関数
IUnknownのQueryInterfaceをプロキシ経由で呼ぶ。
DLLRPCRT4.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// RPCRT4.dll
#include <windows.h>

HRESULT IUnknown_QueryInterface_Proxy(
    IUnknown* This,
    const GUID* riid,
    void** ppvObject
);

パラメーター

名前方向説明
ThisIUnknown*in対象となるCOMオブジェクトの IUnknown インターフェイスポインター。
riidGUID*in問い合わせるインターフェイスの識別子(IID)へのポインター。
ppvObjectvoid**out取得したインターフェイスポインターを受け取る変数のアドレス。

戻り値の型: HRESULT

各言語での呼び出し定義

// RPCRT4.dll
#include <windows.h>

HRESULT IUnknown_QueryInterface_Proxy(
    IUnknown* This,
    const GUID* riid,
    void** ppvObject
);
[DllImport("RPCRT4.dll", ExactSpelling = true)]
static extern int IUnknown_QueryInterface_Proxy(
    IntPtr This,   // IUnknown*
    ref Guid riid,   // GUID*
    IntPtr ppvObject   // void** out
);
<DllImport("RPCRT4.dll", ExactSpelling:=True)>
Public Shared Function IUnknown_QueryInterface_Proxy(
    This As IntPtr,   ' IUnknown*
    ByRef riid As Guid,   ' GUID*
    ppvObject As IntPtr   ' void** out
) As Integer
End Function
' This : IUnknown*
' riid : GUID*
' ppvObject : void** out
Declare PtrSafe Function IUnknown_QueryInterface_Proxy Lib "rpcrt4" ( _
    ByVal This As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal ppvObject 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

IUnknown_QueryInterface_Proxy = ctypes.windll.rpcrt4.IUnknown_QueryInterface_Proxy
IUnknown_QueryInterface_Proxy.restype = ctypes.c_int
IUnknown_QueryInterface_Proxy.argtypes = [
    ctypes.c_void_p,  # This : IUnknown*
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppvObject : void** out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RPCRT4.dll')
IUnknown_QueryInterface_Proxy = Fiddle::Function.new(
  lib['IUnknown_QueryInterface_Proxy'],
  [
    Fiddle::TYPE_VOIDP,  # This : IUnknown*
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppvObject : void** out
  ],
  Fiddle::TYPE_INT)
#[link(name = "rpcrt4")]
extern "system" {
    fn IUnknown_QueryInterface_Proxy(
        This: *mut core::ffi::c_void,  // IUnknown*
        riid: *const GUID,  // GUID*
        ppvObject: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("RPCRT4.dll")]
public static extern int IUnknown_QueryInterface_Proxy(IntPtr This, ref Guid riid, IntPtr ppvObject);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RPCRT4_IUnknown_QueryInterface_Proxy' -Namespace Win32 -PassThru
# $api::IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
#uselib "RPCRT4.dll"
#func global IUnknown_QueryInterface_Proxy "IUnknown_QueryInterface_Proxy" sptr, sptr, sptr
; IUnknown_QueryInterface_Proxy This, varptr(riid), ppvObject   ; 戻り値は stat
; This : IUnknown* -> "sptr"
; riid : GUID* -> "sptr"
; ppvObject : 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。
出力引数:
#uselib "RPCRT4.dll"
#cfunc global IUnknown_QueryInterface_Proxy "IUnknown_QueryInterface_Proxy" sptr, var, sptr
; res = IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
; This : IUnknown* -> "sptr"
; riid : GUID* -> "var"
; ppvObject : void** out -> "sptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
出力引数:
; HRESULT IUnknown_QueryInterface_Proxy(IUnknown* This, GUID* riid, void** ppvObject)
#uselib "RPCRT4.dll"
#cfunc global IUnknown_QueryInterface_Proxy "IUnknown_QueryInterface_Proxy" intptr, var, intptr
; res = IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
; This : IUnknown* -> "intptr"
; riid : GUID* -> "var"
; ppvObject : void** out -> "intptr"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	rpcrt4 = windows.NewLazySystemDLL("RPCRT4.dll")
	procIUnknown_QueryInterface_Proxy = rpcrt4.NewProc("IUnknown_QueryInterface_Proxy")
)

// This (IUnknown*), riid (GUID*), ppvObject (void** out)
r1, _, err := procIUnknown_QueryInterface_Proxy.Call(
	uintptr(This),
	uintptr(riid),
	uintptr(ppvObject),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT
function IUnknown_QueryInterface_Proxy(
  This: Pointer;   // IUnknown*
  riid: PGUID;   // GUID*
  ppvObject: Pointer   // void** out
): Integer; stdcall;
  external 'RPCRT4.dll' name 'IUnknown_QueryInterface_Proxy';
result := DllCall("RPCRT4\IUnknown_QueryInterface_Proxy"
    , "Ptr", This   ; IUnknown*
    , "Ptr", riid   ; GUID*
    , "Ptr", ppvObject   ; void** out
    , "Int")   ; return: HRESULT
●IUnknown_QueryInterface_Proxy(This, riid, ppvObject) = DLL("RPCRT4.dll", "int IUnknown_QueryInterface_Proxy(void*, void*, void*)")
# 呼び出し: IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
# This : IUnknown* -> "void*"
# riid : GUID* -> "void*"
# ppvObject : 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 "rpcrt4" fn IUnknown_QueryInterface_Proxy(
    This: ?*anyopaque, // IUnknown*
    riid: [*c]GUID, // GUID*
    ppvObject: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) i32;
proc IUnknown_QueryInterface_Proxy(
    This: pointer,  # IUnknown*
    riid: ptr GUID,  # GUID*
    ppvObject: pointer  # void** out
): int32 {.importc: "IUnknown_QueryInterface_Proxy", stdcall, dynlib: "RPCRT4.dll".}
pragma(lib, "rpcrt4");
extern(Windows)
int IUnknown_QueryInterface_Proxy(
    void* This,   // IUnknown*
    GUID* riid,   // GUID*
    void** ppvObject   // void** out
);
ccall((:IUnknown_QueryInterface_Proxy, "RPCRT4.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{GUID}, Ptr{Cvoid}),
      This, riid, ppvObject)
# This : IUnknown* -> Ptr{Cvoid}
# riid : GUID* -> Ptr{GUID}
# ppvObject : 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[[
int32_t IUnknown_QueryInterface_Proxy(
    void* This,
    void* riid,
    void** ppvObject);
]]
local rpcrt4 = ffi.load("rpcrt4")
-- rpcrt4.IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
-- This : IUnknown*
-- riid : GUID*
-- ppvObject : 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('RPCRT4.dll');
const IUnknown_QueryInterface_Proxy = lib.func('__stdcall', 'IUnknown_QueryInterface_Proxy', 'int32_t', ['void *', 'void *', 'void *']);
// IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
// This : IUnknown* -> 'void *'
// riid : GUID* -> 'void *'
// ppvObject : 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("RPCRT4.dll", {
  IUnknown_QueryInterface_Proxy: { parameters: ["pointer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.IUnknown_QueryInterface_Proxy(This, riid, ppvObject)
// This : IUnknown* -> "pointer"
// riid : GUID* -> "pointer"
// ppvObject : 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
int32_t IUnknown_QueryInterface_Proxy(
    void* This,
    void* riid,
    void** ppvObject);
C, "RPCRT4.dll");
// $ffi->IUnknown_QueryInterface_Proxy(This, riid, ppvObject);
// This : IUnknown*
// riid : GUID*
// ppvObject : 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 Rpcrt4 extends StdCallLibrary {
    Rpcrt4 INSTANCE = Native.load("rpcrt4", Rpcrt4.class);
    int IUnknown_QueryInterface_Proxy(
        Pointer This,   // IUnknown*
        Pointer riid,   // GUID*
        Pointer ppvObject   // void** out
    );
}
@[Link("rpcrt4")]
lib LibRPCRT4
  fun IUnknown_QueryInterface_Proxy = IUnknown_QueryInterface_Proxy(
    This : Void*,   # IUnknown*
    riid : GUID*,   # GUID*
    ppvObject : Void**   # void** out
  ) : Int32
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 IUnknown_QueryInterface_ProxyNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Void>);
typedef IUnknown_QueryInterface_ProxyDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Void>);
final IUnknown_QueryInterface_Proxy = DynamicLibrary.open('RPCRT4.dll')
    .lookupFunction<IUnknown_QueryInterface_ProxyNative, IUnknown_QueryInterface_ProxyDart>('IUnknown_QueryInterface_Proxy');
// This : IUnknown* -> Pointer<Void>
// riid : GUID* -> Pointer<Void>
// ppvObject : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function IUnknown_QueryInterface_Proxy(
  This: Pointer;   // IUnknown*
  riid: PGUID;   // GUID*
  ppvObject: Pointer   // void** out
): Integer; stdcall;
  external 'RPCRT4.dll' name 'IUnknown_QueryInterface_Proxy';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "IUnknown_QueryInterface_Proxy"
  c_IUnknown_QueryInterface_Proxy :: Ptr () -> Ptr () -> Ptr () -> IO Int32
-- This : IUnknown* -> Ptr ()
-- riid : GUID* -> Ptr ()
-- ppvObject : 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 iunknown_queryinterface_proxy =
  foreign "IUnknown_QueryInterface_Proxy"
    ((ptr void) @-> (ptr void) @-> (ptr void) @-> returning int32_t)
(* This : IUnknown* -> (ptr void) *)
(* riid : GUID* -> (ptr void) *)
(* ppvObject : 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 rpcrt4 (t "RPCRT4.dll"))
(cffi:use-foreign-library rpcrt4)

(cffi:defcfun ("IUnknown_QueryInterface_Proxy" iunknown-query-interface-proxy :convention :stdcall) :int32
  (this :pointer)   ; IUnknown*
  (riid :pointer)   ; GUID*
  (ppv-object :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 $IUnknown_QueryInterface_Proxy = Win32::API::More->new('RPCRT4',
    'int IUnknown_QueryInterface_Proxy(LPVOID This, LPVOID riid, LPVOID ppvObject)');
# my $ret = $IUnknown_QueryInterface_Proxy->Call($This, $riid, $ppvObject);
# This : IUnknown* -> LPVOID
# riid : GUID* -> LPVOID
# ppvObject : 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。

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