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DMA_RESOURCE

構造体
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サイズx64: 28 バイト / x86: 28 バイトパッキング1

サイズ=各フィールドのバイト数(x64/x86 で異なる場合は x64/x86 と併記)。x64/x86 列=フィールドのバイトオフセット(HSPで dupptr / lpoke / wpoke 等に使用)。

フィールド

フィールド型サイズx64x86説明
DMA_HeaderDMA_DES16+0+0DMAリソースの記述子ヘッダ(DMA_DES)。
DMA_DataDMA_RANGE12+16+16DMA範囲データの先頭(DMA_RANGE)。可変長配列の起点。

各言語での定義

#include <windows.h>

// DMA_DES  (x64 16 / x86 16 バイト)
#pragma pack(push, 1)
typedef struct DMA_DES {
    DWORD DD_Count;
    DWORD DD_Type;
    DD_FLAGS DD_Flags;
    DWORD DD_Alloc_Chan;
} DMA_DES;
#pragma pack(pop)

// DMA_RANGE  (x64 12 / x86 12 バイト)
#pragma pack(push, 1)
typedef struct DMA_RANGE {
    DWORD DR_Min;
    DWORD DR_Max;
    DD_FLAGS DR_Flags;
} DMA_RANGE;
#pragma pack(pop)

// DMA_RESOURCE  (x64 28 / x86 28 バイト)
#pragma pack(push, 1)
typedef struct DMA_RESOURCE {
    DMA_DES DMA_Header;
    DMA_RANGE DMA_Data[1];
} DMA_RESOURCE;
#pragma pack(pop)
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct DMA_DES
{
    public uint DD_Count;
    public uint DD_Type;
    public uint DD_Flags;
    public uint DD_Alloc_Chan;
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct DMA_RANGE
{
    public uint DR_Min;
    public uint DR_Max;
    public uint DR_Flags;
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct DMA_RESOURCE
{
    public DMA_DES DMA_Header;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1)] public DMA_RANGE[] DMA_Data;
}
Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure DMA_DES
    Public DD_Count As UInteger
    Public DD_Type As UInteger
    Public DD_Flags As UInteger
    Public DD_Alloc_Chan As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure DMA_RANGE
    Public DR_Min As UInteger
    Public DR_Max As UInteger
    Public DR_Flags As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure DMA_RESOURCE
    Public DMA_Header As DMA_DES
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=1)> Public DMA_Data() As DMA_RANGE
End Structure
import ctypes
from ctypes import wintypes

class DMA_DES(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("DD_Count", wintypes.DWORD),
        ("DD_Type", wintypes.DWORD),
        ("DD_Flags", wintypes.DWORD),
        ("DD_Alloc_Chan", wintypes.DWORD),
    ]

class DMA_RANGE(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("DR_Min", wintypes.DWORD),
        ("DR_Max", wintypes.DWORD),
        ("DR_Flags", wintypes.DWORD),
    ]

class DMA_RESOURCE(ctypes.Structure):
    _pack_ = 1
    _fields_ = [
        ("DMA_Header", DMA_DES),
        ("DMA_Data", DMA_RANGE * 1),
    ]
#[repr(C, packed(1))]
pub struct DMA_DES {
    pub DD_Count: u32,
    pub DD_Type: u32,
    pub DD_Flags: u32,
    pub DD_Alloc_Chan: u32,
}

#[repr(C, packed(1))]
pub struct DMA_RANGE {
    pub DR_Min: u32,
    pub DR_Max: u32,
    pub DR_Flags: u32,
}

#[repr(C, packed(1))]
pub struct DMA_RESOURCE {
    pub DMA_Header: DMA_DES,
    pub DMA_Data: [DMA_RANGE; 1],
}
import "golang.org/x/sys/windows"

type DMA_DES struct {
	DD_Count uint32
	DD_Type uint32
	DD_Flags uint32
	DD_Alloc_Chan uint32
}

type DMA_RANGE struct {
	DR_Min uint32
	DR_Max uint32
	DR_Flags uint32
}

type DMA_RESOURCE struct {
	DMA_Header DMA_DES
	DMA_Data [1]DMA_RANGE
}
type
  DMA_DES = packed record
    DD_Count: DWORD;
    DD_Type: DWORD;
    DD_Flags: DWORD;
    DD_Alloc_Chan: DWORD;
  end;

  DMA_RANGE = packed record
    DR_Min: DWORD;
    DR_Max: DWORD;
    DR_Flags: DWORD;
  end;

  DMA_RESOURCE = packed record
    DMA_Header: DMA_DES;
    DMA_Data: array[0..0] of DMA_RANGE;
  end;
const DMA_DES = extern struct {
    DD_Count: u32,
    DD_Type: u32,
    DD_Flags: u32,
    DD_Alloc_Chan: u32,
};

const DMA_RANGE = extern struct {
    DR_Min: u32,
    DR_Max: u32,
    DR_Flags: u32,
};

const DMA_RESOURCE = extern struct {
    DMA_Header: DMA_DES,
    DMA_Data: [1]DMA_RANGE,
};
type
  DMA_DES {.packed.} = object
    DD_Count: uint32
    DD_Type: uint32
    DD_Flags: uint32
    DD_Alloc_Chan: uint32

  DMA_RANGE {.packed.} = object
    DR_Min: uint32
    DR_Max: uint32
    DR_Flags: uint32

  DMA_RESOURCE {.packed.} = object
    DMA_Header: DMA_DES
    DMA_Data: array[1, DMA_RANGE]
align(1)
struct DMA_DES
{
    uint DD_Count;
    uint DD_Type;
    uint DD_Flags;
    uint DD_Alloc_Chan;
}

align(1)
struct DMA_RANGE
{
    uint DR_Min;
    uint DR_Max;
    uint DR_Flags;
}

align(1)
struct DMA_RESOURCE
{
    DMA_DES DMA_Header;
    DMA_RANGE[1] DMA_Data;
}

HSP用 定義

HSP3.7/3.8 は構造体機能が無いため4byte整数配列(dim)+peek/poke で操作(32/64bitでサイズ・位置が異なる場合はタブで分割)。IronHSP は NSTRUCT(#defstruct/stdim/->)で32/64bit共通。

; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x64 レイアウト)
; DMA_RESOURCE サイズ: 28 バイト(x64)
dim st, 7    ; 4byte整数×7(構造体サイズ 28 / 4 切り上げ)
; DMA_Header : DMA_DES (+0, 16byte)  varptr(st)+0 を基点に操作(16byte:入れ子/配列)
; DMA_Data : DMA_RANGE (+16, 12byte)  varptr(st)+16 を基点に操作(12byte:入れ子/配列)
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。
; IronHSP は NSTRUCT(構造体)をサポート。32bit/64bit どちらでも同じコードで動作します。
; ※GUID・入れ子構造体はデフォルト型でないため、依存する #defstruct を先に定義(下記に同梱)。
#defstruct global DMA_DES, pack=1
    #field int DD_Count
    #field int DD_Type
    #field int DD_Flags
    #field int DD_Alloc_Chan
#endstruct

#defstruct global DMA_RANGE, pack=1
    #field int DR_Min
    #field int DR_Max
    #field int DR_Flags
#endstruct

#defstruct global DMA_RESOURCE, pack=1
    #field DMA_DES DMA_Header
    #field DMA_RANGE DMA_Data 1
#endstruct

stdim st, DMA_RESOURCE        ; NSTRUCT 変数を確保