ホーム › Media.MediaFoundation › MFAllocateWorkQueue

MFAllocateWorkQueue

関数

新しい非公開作業キューを割り当てる。

DLLMFPlat.dll呼出規約winapi対応OSWindows Vista 以降

シグネチャ

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

HRESULT MFAllocateWorkQueue(
    DWORD* pdwWorkQueue
);

パラメーター

名前	型	方向
pdwWorkQueue	DWORD*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT MFAllocateWorkQueue(
    DWORD* pdwWorkQueue
);

[DllImport("MFPlat.dll", ExactSpelling = true)]
static extern int MFAllocateWorkQueue(
    out uint pdwWorkQueue   // DWORD* out
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFAllocateWorkQueue(
    <Out> ByRef pdwWorkQueue As UInteger   ' DWORD* out
) As Integer
End Function

' pdwWorkQueue : DWORD* out
Declare PtrSafe Function MFAllocateWorkQueue Lib "mfplat" ( _
    ByRef pdwWorkQueue As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

MFAllocateWorkQueue = ctypes.windll.mfplat.MFAllocateWorkQueue
MFAllocateWorkQueue.restype = ctypes.c_int
MFAllocateWorkQueue.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # pdwWorkQueue : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFAllocateWorkQueue = Fiddle::Function.new(
  lib['MFAllocateWorkQueue'],
  [
    Fiddle::TYPE_VOIDP,  # pdwWorkQueue : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFAllocateWorkQueue(
        pdwWorkQueue: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFAllocateWorkQueue(out uint pdwWorkQueue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFAllocateWorkQueue' -Namespace Win32 -PassThru
# $api::MFAllocateWorkQueue(pdwWorkQueue)

#uselib "MFPlat.dll"
#func global MFAllocateWorkQueue "MFAllocateWorkQueue" sptr
; MFAllocateWorkQueue varptr(pdwWorkQueue)   ; 戻り値は stat
; pdwWorkQueue : DWORD* 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 "MFPlat.dll"
#cfunc global MFAllocateWorkQueue "MFAllocateWorkQueue" var
; res = MFAllocateWorkQueue(pdwWorkQueue)
; pdwWorkQueue : DWORD* out -> "var"
; ※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。#uselib "MFPlat.dll"
#cfunc global MFAllocateWorkQueue "MFAllocateWorkQueue" sptr
; res = MFAllocateWorkQueue(varptr(pdwWorkQueue))
; pdwWorkQueue : DWORD* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT MFAllocateWorkQueue(DWORD* pdwWorkQueue)
#uselib "MFPlat.dll"
#cfunc global MFAllocateWorkQueue "MFAllocateWorkQueue" var
; res = MFAllocateWorkQueue(pdwWorkQueue)
; pdwWorkQueue : DWORD* out -> "var"
; ※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。; HRESULT MFAllocateWorkQueue(DWORD* pdwWorkQueue)
#uselib "MFPlat.dll"
#cfunc global MFAllocateWorkQueue "MFAllocateWorkQueue" intptr
; res = MFAllocateWorkQueue(varptr(pdwWorkQueue))
; pdwWorkQueue : DWORD* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFAllocateWorkQueue = mfplat.NewProc("MFAllocateWorkQueue")
)

// pdwWorkQueue (DWORD* out)
r1, _, err := procMFAllocateWorkQueue.Call(
	uintptr(pdwWorkQueue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFAllocateWorkQueue(
  pdwWorkQueue: Pointer   // DWORD* out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFAllocateWorkQueue';

result := DllCall("MFPlat\MFAllocateWorkQueue"
    , "Ptr", pdwWorkQueue   ; DWORD* out
    , "Int")   ; return: HRESULT

●MFAllocateWorkQueue(pdwWorkQueue) = DLL("MFPlat.dll", "int MFAllocateWorkQueue(void*)")
# 呼び出し: MFAllocateWorkQueue(pdwWorkQueue)
# pdwWorkQueue : DWORD* 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)。