ホーム › Storage.FileSystem › BuildIoRingReadFileScatter

BuildIoRingReadFileScatter

関数

I/Oリングに複数バッファへ分散読み取りする操作を構築する。

DLLKERNEL32.dll呼出規約winapi

シグネチャ

// KERNEL32.dll
#include <windows.h>

HRESULT BuildIoRingReadFileScatter(
    HIORING ioRing,
    IORING_HANDLE_REF fileRef,
    DWORD segmentCount,
    FILE_SEGMENT_ELEMENT* segmentArray,
    DWORD numberOfBytesToRead,
    ULONGLONG fileOffset,
    UINT_PTR userData,
    IORING_SQE_FLAGS sqeFlags
);

パラメーター

名前	型	方向	説明
ioRing	HIORING	in	スキャッタ読み取り操作を構築する対象のI/Oリングのハンドル。
fileRef	IORING_HANDLE_REF	in	読み取り元ファイルへの参照(IORING_HANDLE_REF)。
segmentCount	DWORD	in	segmentArrayに含まれるセグメント要素の数。
segmentArray	FILE_SEGMENT_ELEMENT*	in	読み取りデータの分散先ページを記述するFILE_SEGMENT_ELEMENT配列へのポインタ。
numberOfBytesToRead	DWORD	in	読み取る合計バイト数を指定する。
fileOffset	ULONGLONG	in	読み取りを開始するファイル先頭からのオフセット(バイト)。
userData	UINT_PTR	in	完了時に識別用として返される任意のユーザデータ(UINT_PTR)。
sqeFlags	IORING_SQE_FLAGS	in	送信キューエントリの動作を制御するフラグ(IORING_SQE_FLAGS)。

戻り値の型: HRESULT

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

HRESULT BuildIoRingReadFileScatter(
    HIORING ioRing,
    IORING_HANDLE_REF fileRef,
    DWORD segmentCount,
    FILE_SEGMENT_ELEMENT* segmentArray,
    DWORD numberOfBytesToRead,
    ULONGLONG fileOffset,
    UINT_PTR userData,
    IORING_SQE_FLAGS sqeFlags
);

[DllImport("KERNEL32.dll", ExactSpelling = true)]
static extern int BuildIoRingReadFileScatter(
    IntPtr ioRing,   // HIORING
    IORING_HANDLE_REF fileRef,   // IORING_HANDLE_REF
    uint segmentCount,   // DWORD
    IntPtr segmentArray,   // FILE_SEGMENT_ELEMENT*
    uint numberOfBytesToRead,   // DWORD
    ulong fileOffset,   // ULONGLONG
    UIntPtr userData,   // UINT_PTR
    int sqeFlags   // IORING_SQE_FLAGS
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function BuildIoRingReadFileScatter(
    ioRing As IntPtr,   ' HIORING
    fileRef As IORING_HANDLE_REF,   ' IORING_HANDLE_REF
    segmentCount As UInteger,   ' DWORD
    segmentArray As IntPtr,   ' FILE_SEGMENT_ELEMENT*
    numberOfBytesToRead As UInteger,   ' DWORD
    fileOffset As ULong,   ' ULONGLONG
    userData As UIntPtr,   ' UINT_PTR
    sqeFlags As Integer   ' IORING_SQE_FLAGS
) As Integer
End Function

' ioRing : HIORING
' fileRef : IORING_HANDLE_REF
' segmentCount : DWORD
' segmentArray : FILE_SEGMENT_ELEMENT*
' numberOfBytesToRead : DWORD
' fileOffset : ULONGLONG
' userData : UINT_PTR
' sqeFlags : IORING_SQE_FLAGS
Declare PtrSafe Function BuildIoRingReadFileScatter Lib "kernel32" ( _
    ByVal ioRing As LongPtr, _
    ByVal fileRef As LongPtr, _
    ByVal segmentCount As Long, _
    ByVal segmentArray As LongPtr, _
    ByVal numberOfBytesToRead As Long, _
    ByVal fileOffset As LongLong, _
    ByVal userData As LongPtr, _
    ByVal sqeFlags 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

BuildIoRingReadFileScatter = ctypes.windll.kernel32.BuildIoRingReadFileScatter
BuildIoRingReadFileScatter.restype = ctypes.c_int
BuildIoRingReadFileScatter.argtypes = [
    wintypes.HANDLE,  # ioRing : HIORING
    IORING_HANDLE_REF,  # fileRef : IORING_HANDLE_REF
    wintypes.DWORD,  # segmentCount : DWORD
    ctypes.c_void_p,  # segmentArray : FILE_SEGMENT_ELEMENT*
    wintypes.DWORD,  # numberOfBytesToRead : DWORD
    ctypes.c_ulonglong,  # fileOffset : ULONGLONG
    ctypes.c_size_t,  # userData : UINT_PTR
    ctypes.c_int,  # sqeFlags : IORING_SQE_FLAGS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
BuildIoRingReadFileScatter = Fiddle::Function.new(
  lib['BuildIoRingReadFileScatter'],
  [
    Fiddle::TYPE_VOIDP,  # ioRing : HIORING
    Fiddle::TYPE_VOIDP,  # fileRef : IORING_HANDLE_REF
    -Fiddle::TYPE_INT,  # segmentCount : DWORD
    Fiddle::TYPE_VOIDP,  # segmentArray : FILE_SEGMENT_ELEMENT*
    -Fiddle::TYPE_INT,  # numberOfBytesToRead : DWORD
    -Fiddle::TYPE_LONG_LONG,  # fileOffset : ULONGLONG
    Fiddle::TYPE_UINTPTR_T,  # userData : UINT_PTR
    Fiddle::TYPE_INT,  # sqeFlags : IORING_SQE_FLAGS
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn BuildIoRingReadFileScatter(
        ioRing: *mut core::ffi::c_void,  // HIORING
        fileRef: IORING_HANDLE_REF,  // IORING_HANDLE_REF
        segmentCount: u32,  // DWORD
        segmentArray: *mut FILE_SEGMENT_ELEMENT,  // FILE_SEGMENT_ELEMENT*
        numberOfBytesToRead: u32,  // DWORD
        fileOffset: u64,  // ULONGLONG
        userData: usize,  // UINT_PTR
        sqeFlags: i32  // IORING_SQE_FLAGS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern int BuildIoRingReadFileScatter(IntPtr ioRing, IORING_HANDLE_REF fileRef, uint segmentCount, IntPtr segmentArray, uint numberOfBytesToRead, ulong fileOffset, UIntPtr userData, int sqeFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_BuildIoRingReadFileScatter' -Namespace Win32 -PassThru
# $api::BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)

#uselib "KERNEL32.dll"
#func global BuildIoRingReadFileScatter "BuildIoRingReadFileScatter" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; BuildIoRingReadFileScatter ioRing, fileRef, segmentCount, varptr(segmentArray), numberOfBytesToRead, fileOffset, userData, sqeFlags   ; 戻り値は stat
; ioRing : HIORING -> "sptr"
; fileRef : IORING_HANDLE_REF -> "sptr"
; segmentCount : DWORD -> "sptr"
; segmentArray : FILE_SEGMENT_ELEMENT* -> "sptr"
; numberOfBytesToRead : DWORD -> "sptr"
; fileOffset : ULONGLONG -> "sptr"
; userData : UINT_PTR -> "sptr"
; sqeFlags : IORING_SQE_FLAGS -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 "KERNEL32.dll"
#cfunc global BuildIoRingReadFileScatter "BuildIoRingReadFileScatter" sptr, int, int, var, int, int64, sptr, int
; res = BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
; ioRing : HIORING -> "sptr"
; fileRef : IORING_HANDLE_REF -> "int"
; segmentCount : DWORD -> "int"
; segmentArray : FILE_SEGMENT_ELEMENT* -> "var"
; numberOfBytesToRead : DWORD -> "int"
; fileOffset : ULONGLONG -> "int64"
; userData : UINT_PTR -> "sptr"
; sqeFlags : IORING_SQE_FLAGS -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。#uselib "KERNEL32.dll"
#cfunc global BuildIoRingReadFileScatter "BuildIoRingReadFileScatter" sptr, int, int, sptr, int, int64, sptr, int
; res = BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, varptr(segmentArray), numberOfBytesToRead, fileOffset, userData, sqeFlags)
; ioRing : HIORING -> "sptr"
; fileRef : IORING_HANDLE_REF -> "int"
; segmentCount : DWORD -> "int"
; segmentArray : FILE_SEGMENT_ELEMENT* -> "sptr"
; numberOfBytesToRead : DWORD -> "int"
; fileOffset : ULONGLONG -> "int64"
; userData : UINT_PTR -> "sptr"
; sqeFlags : IORING_SQE_FLAGS -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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))。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

出力引数:

; HRESULT BuildIoRingReadFileScatter(HIORING ioRing, IORING_HANDLE_REF fileRef, DWORD segmentCount, FILE_SEGMENT_ELEMENT* segmentArray, DWORD numberOfBytesToRead, ULONGLONG fileOffset, UINT_PTR userData, IORING_SQE_FLAGS sqeFlags)
#uselib "KERNEL32.dll"
#cfunc global BuildIoRingReadFileScatter "BuildIoRingReadFileScatter" intptr, int, int, var, int, int64, intptr, int
; res = BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
; ioRing : HIORING -> "intptr"
; fileRef : IORING_HANDLE_REF -> "int"
; segmentCount : DWORD -> "int"
; segmentArray : FILE_SEGMENT_ELEMENT* -> "var"
; numberOfBytesToRead : DWORD -> "int"
; fileOffset : ULONGLONG -> "int64"
; userData : UINT_PTR -> "intptr"
; sqeFlags : IORING_SQE_FLAGS -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 BuildIoRingReadFileScatter(HIORING ioRing, IORING_HANDLE_REF fileRef, DWORD segmentCount, FILE_SEGMENT_ELEMENT* segmentArray, DWORD numberOfBytesToRead, ULONGLONG fileOffset, UINT_PTR userData, IORING_SQE_FLAGS sqeFlags)
#uselib "KERNEL32.dll"
#cfunc global BuildIoRingReadFileScatter "BuildIoRingReadFileScatter" intptr, int, int, intptr, int, int64, intptr, int
; res = BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, varptr(segmentArray), numberOfBytesToRead, fileOffset, userData, sqeFlags)
; ioRing : HIORING -> "intptr"
; fileRef : IORING_HANDLE_REF -> "int"
; segmentCount : DWORD -> "int"
; segmentArray : FILE_SEGMENT_ELEMENT* -> "intptr"
; numberOfBytesToRead : DWORD -> "int"
; fileOffset : ULONGLONG -> "int64"
; userData : UINT_PTR -> "intptr"
; sqeFlags : IORING_SQE_FLAGS -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procBuildIoRingReadFileScatter = kernel32.NewProc("BuildIoRingReadFileScatter")
)

// ioRing (HIORING), fileRef (IORING_HANDLE_REF), segmentCount (DWORD), segmentArray (FILE_SEGMENT_ELEMENT*), numberOfBytesToRead (DWORD), fileOffset (ULONGLONG), userData (UINT_PTR), sqeFlags (IORING_SQE_FLAGS)
r1, _, err := procBuildIoRingReadFileScatter.Call(
	uintptr(ioRing),
	uintptr(fileRef),
	uintptr(segmentCount),
	uintptr(segmentArray),
	uintptr(numberOfBytesToRead),
	uintptr(fileOffset),
	uintptr(userData),
	uintptr(sqeFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function BuildIoRingReadFileScatter(
  ioRing: THandle;   // HIORING
  fileRef: IORING_HANDLE_REF;   // IORING_HANDLE_REF
  segmentCount: DWORD;   // DWORD
  segmentArray: Pointer;   // FILE_SEGMENT_ELEMENT*
  numberOfBytesToRead: DWORD;   // DWORD
  fileOffset: UInt64;   // ULONGLONG
  userData: NativeUInt;   // UINT_PTR
  sqeFlags: Integer   // IORING_SQE_FLAGS
): Integer; stdcall;
  external 'KERNEL32.dll' name 'BuildIoRingReadFileScatter';

result := DllCall("KERNEL32\BuildIoRingReadFileScatter"
    , "Ptr", ioRing   ; HIORING
    , "Ptr", fileRef   ; IORING_HANDLE_REF
    , "UInt", segmentCount   ; DWORD
    , "Ptr", segmentArray   ; FILE_SEGMENT_ELEMENT*
    , "UInt", numberOfBytesToRead   ; DWORD
    , "Int64", fileOffset   ; ULONGLONG
    , "UPtr", userData   ; UINT_PTR
    , "Int", sqeFlags   ; IORING_SQE_FLAGS
    , "Int")   ; return: HRESULT

●BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags) = DLL("KERNEL32.dll", "int BuildIoRingReadFileScatter(void*, void*, dword, void*, dword, qword, int, int)")
# 呼び出し: BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
# ioRing : HIORING -> "void*"
# fileRef : IORING_HANDLE_REF -> "void*"
# segmentCount : DWORD -> "dword"
# segmentArray : FILE_SEGMENT_ELEMENT* -> "void*"
# numberOfBytesToRead : DWORD -> "dword"
# fileOffset : ULONGLONG -> "qword"
# userData : UINT_PTR -> "int"
# sqeFlags : IORING_SQE_FLAGS -> "int"
# 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 "kernel32" fn BuildIoRingReadFileScatter(
    ioRing: ?*anyopaque, // HIORING
    fileRef: IORING_HANDLE_REF, // IORING_HANDLE_REF
    segmentCount: u32, // DWORD
    segmentArray: [*c]FILE_SEGMENT_ELEMENT, // FILE_SEGMENT_ELEMENT*
    numberOfBytesToRead: u32, // DWORD
    fileOffset: u64, // ULONGLONG
    userData: usize, // UINT_PTR
    sqeFlags: i32 // IORING_SQE_FLAGS
) callconv(std.os.windows.WINAPI) i32;

proc BuildIoRingReadFileScatter(
    ioRing: pointer,  # HIORING
    fileRef: IORING_HANDLE_REF,  # IORING_HANDLE_REF
    segmentCount: uint32,  # DWORD
    segmentArray: ptr FILE_SEGMENT_ELEMENT,  # FILE_SEGMENT_ELEMENT*
    numberOfBytesToRead: uint32,  # DWORD
    fileOffset: uint64,  # ULONGLONG
    userData: uint,  # UINT_PTR
    sqeFlags: int32  # IORING_SQE_FLAGS
): int32 {.importc: "BuildIoRingReadFileScatter", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int BuildIoRingReadFileScatter(
    void* ioRing,   // HIORING
    IORING_HANDLE_REF fileRef,   // IORING_HANDLE_REF
    uint segmentCount,   // DWORD
    FILE_SEGMENT_ELEMENT* segmentArray,   // FILE_SEGMENT_ELEMENT*
    uint numberOfBytesToRead,   // DWORD
    ulong fileOffset,   // ULONGLONG
    size_t userData,   // UINT_PTR
    int sqeFlags   // IORING_SQE_FLAGS
);

ccall((:BuildIoRingReadFileScatter, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, IORING_HANDLE_REF, UInt32, Ptr{FILE_SEGMENT_ELEMENT}, UInt32, UInt64, Csize_t, Int32),
      ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
# ioRing : HIORING -> Ptr{Cvoid}
# fileRef : IORING_HANDLE_REF -> IORING_HANDLE_REF
# segmentCount : DWORD -> UInt32
# segmentArray : FILE_SEGMENT_ELEMENT* -> Ptr{FILE_SEGMENT_ELEMENT}
# numberOfBytesToRead : DWORD -> UInt32
# fileOffset : ULONGLONG -> UInt64
# userData : UINT_PTR -> Csize_t
# sqeFlags : IORING_SQE_FLAGS -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t BuildIoRingReadFileScatter(
    void* ioRing,
    IORING_HANDLE_REF fileRef,
    uint32_t segmentCount,
    void* segmentArray,
    uint32_t numberOfBytesToRead,
    uint64_t fileOffset,
    uintptr_t userData,
    int32_t sqeFlags);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
-- ioRing : HIORING
-- fileRef : IORING_HANDLE_REF
-- segmentCount : DWORD
-- segmentArray : FILE_SEGMENT_ELEMENT*
-- numberOfBytesToRead : DWORD
-- fileOffset : ULONGLONG
-- userData : UINT_PTR
-- sqeFlags : IORING_SQE_FLAGS
-- 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('KERNEL32.dll');
const BuildIoRingReadFileScatter = lib.func('__stdcall', 'BuildIoRingReadFileScatter', 'int32_t', ['void *', 'IORING_HANDLE_REF', 'uint32_t', 'void *', 'uint32_t', 'uint64_t', 'uintptr_t', 'int32_t']);
// BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
// ioRing : HIORING -> 'void *'
// fileRef : IORING_HANDLE_REF -> 'IORING_HANDLE_REF'
// segmentCount : DWORD -> 'uint32_t'
// segmentArray : FILE_SEGMENT_ELEMENT* -> 'void *'
// numberOfBytesToRead : DWORD -> 'uint32_t'
// fileOffset : ULONGLONG -> 'uint64_t'
// userData : UINT_PTR -> 'uintptr_t'
// sqeFlags : IORING_SQE_FLAGS -> 'int32_t'
// 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("KERNEL32.dll", {
  BuildIoRingReadFileScatter: { parameters: ["pointer", "buffer", "u32", "pointer", "u32", "u64", "usize", "i32"], result: "i32" },
});
// lib.symbols.BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags)
// ioRing : HIORING -> "pointer"
// fileRef : IORING_HANDLE_REF -> "buffer"
// segmentCount : DWORD -> "u32"
// segmentArray : FILE_SEGMENT_ELEMENT* -> "pointer"
// numberOfBytesToRead : DWORD -> "u32"
// fileOffset : ULONGLONG -> "u64"
// userData : UINT_PTR -> "usize"
// sqeFlags : IORING_SQE_FLAGS -> "i32"
// 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 BuildIoRingReadFileScatter(
    void* ioRing,
    IORING_HANDLE_REF fileRef,
    uint32_t segmentCount,
    void* segmentArray,
    uint32_t numberOfBytesToRead,
    uint64_t fileOffset,
    size_t userData,
    int32_t sqeFlags);
C, "KERNEL32.dll");
// $ffi->BuildIoRingReadFileScatter(ioRing, fileRef, segmentCount, segmentArray, numberOfBytesToRead, fileOffset, userData, sqeFlags);
// ioRing : HIORING
// fileRef : IORING_HANDLE_REF
// segmentCount : DWORD
// segmentArray : FILE_SEGMENT_ELEMENT*
// numberOfBytesToRead : DWORD
// fileOffset : ULONGLONG
// userData : UINT_PTR
// sqeFlags : IORING_SQE_FLAGS
// 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    int BuildIoRingReadFileScatter(
        Pointer ioRing,   // HIORING
        IORING_HANDLE_REF /* extends Structure (by value) */ fileRef,   // IORING_HANDLE_REF
        int segmentCount,   // DWORD
        Pointer segmentArray,   // FILE_SEGMENT_ELEMENT*
        int numberOfBytesToRead,   // DWORD
        long fileOffset,   // ULONGLONG
        long userData,   // UINT_PTR
        int sqeFlags   // IORING_SQE_FLAGS
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun BuildIoRingReadFileScatter = BuildIoRingReadFileScatter(
    ioRing : Void*,   # HIORING
    fileRef : IORING_HANDLE_REF,   # IORING_HANDLE_REF
    segmentCount : UInt32,   # DWORD
    segmentArray : FILE_SEGMENT_ELEMENT*,   # FILE_SEGMENT_ELEMENT*
    numberOfBytesToRead : UInt32,   # DWORD
    fileOffset : UInt64,   # ULONGLONG
    userData : LibC::SizeT,   # UINT_PTR
    sqeFlags : Int32   # IORING_SQE_FLAGS
  ) : 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 BuildIoRingReadFileScatterNative = Int32 Function(Pointer<Void>, IORING_HANDLE_REF, Uint32, Pointer<Void>, Uint32, Uint64, UintPtr, Int32);
typedef BuildIoRingReadFileScatterDart = int Function(Pointer<Void>, int, int, Pointer<Void>, int, int, int, int);
final BuildIoRingReadFileScatter = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<BuildIoRingReadFileScatterNative, BuildIoRingReadFileScatterDart>('BuildIoRingReadFileScatter');
// ioRing : HIORING -> Pointer<Void>
// fileRef : IORING_HANDLE_REF -> IORING_HANDLE_REF
// segmentCount : DWORD -> Uint32
// segmentArray : FILE_SEGMENT_ELEMENT* -> Pointer<Void>
// numberOfBytesToRead : DWORD -> Uint32
// fileOffset : ULONGLONG -> Uint64
// userData : UINT_PTR -> UintPtr
// sqeFlags : IORING_SQE_FLAGS -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function BuildIoRingReadFileScatter(
  ioRing: THandle;   // HIORING
  fileRef: IORING_HANDLE_REF;   // IORING_HANDLE_REF
  segmentCount: DWORD;   // DWORD
  segmentArray: Pointer;   // FILE_SEGMENT_ELEMENT*
  numberOfBytesToRead: DWORD;   // DWORD
  fileOffset: UInt64;   // ULONGLONG
  userData: NativeUInt;   // UINT_PTR
  sqeFlags: Integer   // IORING_SQE_FLAGS
): Integer; stdcall;
  external 'KERNEL32.dll' name 'BuildIoRingReadFileScatter';

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

foreign import stdcall safe "BuildIoRingReadFileScatter"
  c_BuildIoRingReadFileScatter :: Ptr () -> IORING_HANDLE_REF -> Word32 -> Ptr () -> Word32 -> Word64 -> CUIntPtr -> Int32 -> IO Int32
-- ioRing : HIORING -> Ptr ()
-- fileRef : IORING_HANDLE_REF -> IORING_HANDLE_REF
-- segmentCount : DWORD -> Word32
-- segmentArray : FILE_SEGMENT_ELEMENT* -> Ptr ()
-- numberOfBytesToRead : DWORD -> Word32
-- fileOffset : ULONGLONG -> Word64
-- userData : UINT_PTR -> CUIntPtr
-- sqeFlags : IORING_SQE_FLAGS -> Int32
-- 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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let buildioringreadfilescatter =
  foreign "BuildIoRingReadFileScatter"
    ((ptr void) @-> IORING_HANDLE_REF @-> uint32_t @-> (ptr void) @-> uint32_t @-> uint64_t @-> size_t @-> int32_t @-> returning int32_t)
(* ioRing : HIORING -> (ptr void) *)
(* fileRef : IORING_HANDLE_REF -> IORING_HANDLE_REF *)
(* segmentCount : DWORD -> uint32_t *)
(* segmentArray : FILE_SEGMENT_ELEMENT* -> (ptr void) *)
(* numberOfBytesToRead : DWORD -> uint32_t *)
(* fileOffset : ULONGLONG -> uint64_t *)
(* userData : UINT_PTR -> size_t *)
(* sqeFlags : IORING_SQE_FLAGS -> int32_t *)
(* 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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("BuildIoRingReadFileScatter" build-io-ring-read-file-scatter :convention :stdcall) :int32
  (io-ring :pointer)   ; HIORING
  (file-ref (:struct ioring-handle-ref))   ; IORING_HANDLE_REF
  (segment-count :uint32)   ; DWORD
  (segment-array :pointer)   ; FILE_SEGMENT_ELEMENT*
  (number-of-bytes-to-read :uint32)   ; DWORD
  (file-offset :uint64)   ; ULONGLONG
  (user-data :uint64)   ; UINT_PTR
  (sqe-flags :int32))   ; IORING_SQE_FLAGS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $BuildIoRingReadFileScatter = Win32::API::More->new('KERNEL32',
    'int BuildIoRingReadFileScatter(HANDLE ioRing, LPVOID fileRef, DWORD segmentCount, LPVOID segmentArray, DWORD numberOfBytesToRead, UINT64 fileOffset, WPARAM userData, int sqeFlags)');
# my $ret = $BuildIoRingReadFileScatter->Call($ioRing, $fileRef, $segmentCount, $segmentArray, $numberOfBytesToRead, $fileOffset, $userData, $sqeFlags);
# ioRing : HIORING -> HANDLE
# fileRef : IORING_HANDLE_REF -> LPVOID
# segmentCount : DWORD -> DWORD
# segmentArray : FILE_SEGMENT_ELEMENT* -> LPVOID
# numberOfBytesToRead : DWORD -> DWORD
# fileOffset : ULONGLONG -> UINT64
# userData : UINT_PTR -> WPARAM
# sqeFlags : IORING_SQE_FLAGS -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

BuildIoRingReadFileScatter

シグネチャ

パラメーター

各言語での呼び出し定義

関連項目