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MFCreateAsyncResult

関数

非同期操作の結果を表すオブジェクトを生成する。

DLLMFPlat.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFCreateAsyncResult(
    IUnknown* punkObject,
    IMFAsyncCallback* pCallback,
    IUnknown* punkState,
    IMFAsyncResult** ppAsyncResult
);

パラメーター

名前	型	方向	説明
punkObject	IUnknown*	in	結果に関連付ける対象オブジェクトの IUnknown ポインタ。NULL 可。
pCallback	IMFAsyncCallback*	in	結果完了時に呼ばれる IMFAsyncCallback ポインタ。NULL 可。
punkState	IUnknown*	in	コールバックへ渡す状態オブジェクトの IUnknown ポインタ。NULL 可。
ppAsyncResult	IMFAsyncResult**	out	生成された非同期結果 IMFAsyncResult を受け取る出力ポインタ。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFCreateAsyncResult(
    IUnknown* punkObject,
    IMFAsyncCallback* pCallback,
    IUnknown* punkState,
    IMFAsyncResult** ppAsyncResult
);

[DllImport("MFPlat.dll", ExactSpelling = true)]
static extern int MFCreateAsyncResult(
    IntPtr punkObject,   // IUnknown*
    IntPtr pCallback,   // IMFAsyncCallback*
    IntPtr punkState,   // IUnknown*
    IntPtr ppAsyncResult   // IMFAsyncResult** out
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateAsyncResult(
    punkObject As IntPtr,   ' IUnknown*
    pCallback As IntPtr,   ' IMFAsyncCallback*
    punkState As IntPtr,   ' IUnknown*
    ppAsyncResult As IntPtr   ' IMFAsyncResult** out
) As Integer
End Function

' punkObject : IUnknown*
' pCallback : IMFAsyncCallback*
' punkState : IUnknown*
' ppAsyncResult : IMFAsyncResult** out
Declare PtrSafe Function MFCreateAsyncResult Lib "mfplat" ( _
    ByVal punkObject As LongPtr, _
    ByVal pCallback As LongPtr, _
    ByVal punkState As LongPtr, _
    ByVal ppAsyncResult 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

MFCreateAsyncResult = ctypes.windll.mfplat.MFCreateAsyncResult
MFCreateAsyncResult.restype = ctypes.c_int
MFCreateAsyncResult.argtypes = [
    ctypes.c_void_p,  # punkObject : IUnknown*
    ctypes.c_void_p,  # pCallback : IMFAsyncCallback*
    ctypes.c_void_p,  # punkState : IUnknown*
    ctypes.c_void_p,  # ppAsyncResult : IMFAsyncResult** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateAsyncResult = Fiddle::Function.new(
  lib['MFCreateAsyncResult'],
  [
    Fiddle::TYPE_VOIDP,  # punkObject : IUnknown*
    Fiddle::TYPE_VOIDP,  # pCallback : IMFAsyncCallback*
    Fiddle::TYPE_VOIDP,  # punkState : IUnknown*
    Fiddle::TYPE_VOIDP,  # ppAsyncResult : IMFAsyncResult** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateAsyncResult(
        punkObject: *mut core::ffi::c_void,  // IUnknown*
        pCallback: *mut core::ffi::c_void,  // IMFAsyncCallback*
        punkState: *mut core::ffi::c_void,  // IUnknown*
        ppAsyncResult: *mut *mut core::ffi::c_void  // IMFAsyncResult** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCreateAsyncResult(IntPtr punkObject, IntPtr pCallback, IntPtr punkState, IntPtr ppAsyncResult);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateAsyncResult' -Namespace Win32 -PassThru
# $api::MFCreateAsyncResult(punkObject, pCallback, punkState, ppAsyncResult)

#uselib "MFPlat.dll"
#func global MFCreateAsyncResult "MFCreateAsyncResult" sptr, sptr, sptr, sptr
; MFCreateAsyncResult punkObject, pCallback, punkState, ppAsyncResult   ; 戻り値は stat
; punkObject : IUnknown* -> "sptr"
; pCallback : IMFAsyncCallback* -> "sptr"
; punkState : IUnknown* -> "sptr"
; ppAsyncResult : IMFAsyncResult** 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 "MFPlat.dll"
#cfunc global MFCreateAsyncResult "MFCreateAsyncResult" sptr, sptr, sptr, sptr
; res = MFCreateAsyncResult(punkObject, pCallback, punkState, ppAsyncResult)
; punkObject : IUnknown* -> "sptr"
; pCallback : IMFAsyncCallback* -> "sptr"
; punkState : IUnknown* -> "sptr"
; ppAsyncResult : IMFAsyncResult** out -> "sptr"

; HRESULT MFCreateAsyncResult(IUnknown* punkObject, IMFAsyncCallback* pCallback, IUnknown* punkState, IMFAsyncResult** ppAsyncResult)
#uselib "MFPlat.dll"
#cfunc global MFCreateAsyncResult "MFCreateAsyncResult" intptr, intptr, intptr, intptr
; res = MFCreateAsyncResult(punkObject, pCallback, punkState, ppAsyncResult)
; punkObject : IUnknown* -> "intptr"
; pCallback : IMFAsyncCallback* -> "intptr"
; punkState : IUnknown* -> "intptr"
; ppAsyncResult : IMFAsyncResult** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateAsyncResult = mfplat.NewProc("MFCreateAsyncResult")
)

// punkObject (IUnknown*), pCallback (IMFAsyncCallback*), punkState (IUnknown*), ppAsyncResult (IMFAsyncResult** out)
r1, _, err := procMFCreateAsyncResult.Call(
	uintptr(punkObject),
	uintptr(pCallback),
	uintptr(punkState),
	uintptr(ppAsyncResult),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateAsyncResult(
  punkObject: Pointer;   // IUnknown*
  pCallback: Pointer;   // IMFAsyncCallback*
  punkState: Pointer;   // IUnknown*
  ppAsyncResult: Pointer   // IMFAsyncResult** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateAsyncResult';

result := DllCall("MFPlat\MFCreateAsyncResult"
    , "Ptr", punkObject   ; IUnknown*
    , "Ptr", pCallback   ; IMFAsyncCallback*
    , "Ptr", punkState   ; IUnknown*
    , "Ptr", ppAsyncResult   ; IMFAsyncResult** out
    , "Int")   ; return: HRESULT

●MFCreateAsyncResult(punkObject, pCallback, punkState, ppAsyncResult) = DLL("MFPlat.dll", "int MFCreateAsyncResult(void*, void*, void*, void*)")
# 呼び出し: MFCreateAsyncResult(punkObject, pCallback, punkState, ppAsyncResult)
# punkObject : IUnknown* -> "void*"
# pCallback : IMFAsyncCallback* -> "void*"
# punkState : IUnknown* -> "void*"
# ppAsyncResult : IMFAsyncResult** 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)。