GetIScsiSessionListA

// ISCSIDSC.dll  (ANSI / -A)
#include <windows.h>

DWORD GetIScsiSessionListA(
    DWORD* BufferSize,
    DWORD* SessionCount,
    ISCSI_SESSION_INFOA* SessionInfo
);

<DllImport("ISCSIDSC.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function GetIScsiSessionListA(
    ByRef BufferSize As UInteger,   ' DWORD* in/out
    ByRef SessionCount As UInteger,   ' DWORD* in/out
    SessionInfo As IntPtr   ' ISCSI_SESSION_INFOA* in/out
) As UInteger
End Function

' BufferSize : DWORD* in/out
' SessionCount : DWORD* in/out
' SessionInfo : ISCSI_SESSION_INFOA* in/out
Declare PtrSafe Function GetIScsiSessionListA Lib "iscsidsc" ( _
    ByRef BufferSize As Long, _
    ByRef SessionCount As Long, _
    ByVal SessionInfo 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

GetIScsiSessionListA = ctypes.windll.iscsidsc.GetIScsiSessionListA
GetIScsiSessionListA.restype = wintypes.DWORD
GetIScsiSessionListA.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # BufferSize : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # SessionCount : DWORD* in/out
    ctypes.c_void_p,  # SessionInfo : ISCSI_SESSION_INFOA* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ISCSIDSC.dll')
GetIScsiSessionListA = Fiddle::Function.new(
  lib['GetIScsiSessionListA'],
  [
    Fiddle::TYPE_VOIDP,  # BufferSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # SessionCount : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # SessionInfo : ISCSI_SESSION_INFOA* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iscsidsc")]
extern "system" {
    fn GetIScsiSessionListA(
        BufferSize: *mut u32,  // DWORD* in/out
        SessionCount: *mut u32,  // DWORD* in/out
        SessionInfo: *mut ISCSI_SESSION_INFOA  // ISCSI_SESSION_INFOA* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ISCSIDSC.dll", CharSet = CharSet.Ansi)]
public static extern uint GetIScsiSessionListA(ref uint BufferSize, ref uint SessionCount, IntPtr SessionInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ISCSIDSC_GetIScsiSessionListA' -Namespace Win32 -PassThru
# $api::GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo)

#uselib "ISCSIDSC.dll"
#func global GetIScsiSessionListA "GetIScsiSessionListA" sptr, sptr, sptr
; GetIScsiSessionListA varptr(BufferSize), varptr(SessionCount), varptr(SessionInfo)   ; 戻り値は stat
; BufferSize : DWORD* in/out -> "sptr"
; SessionCount : DWORD* in/out -> "sptr"
; SessionInfo : ISCSI_SESSION_INFOA* in/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。

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

var (
	iscsidsc = windows.NewLazySystemDLL("ISCSIDSC.dll")
	procGetIScsiSessionListA = iscsidsc.NewProc("GetIScsiSessionListA")
)

// BufferSize (DWORD* in/out), SessionCount (DWORD* in/out), SessionInfo (ISCSI_SESSION_INFOA* in/out)
r1, _, err := procGetIScsiSessionListA.Call(
	uintptr(BufferSize),
	uintptr(SessionCount),
	uintptr(SessionInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetIScsiSessionListA(
  BufferSize: Pointer;   // DWORD* in/out
  SessionCount: Pointer;   // DWORD* in/out
  SessionInfo: Pointer   // ISCSI_SESSION_INFOA* in/out
): DWORD; stdcall;
  external 'ISCSIDSC.dll' name 'GetIScsiSessionListA';

result := DllCall("ISCSIDSC\GetIScsiSessionListA"
    , "Ptr", BufferSize   ; DWORD* in/out
    , "Ptr", SessionCount   ; DWORD* in/out
    , "Ptr", SessionInfo   ; ISCSI_SESSION_INFOA* in/out
    , "UInt")   ; return: DWORD

●GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo) = DLL("ISCSIDSC.dll", "dword GetIScsiSessionListA(void*, void*, void*)")
# 呼び出し: GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo)
# BufferSize : DWORD* in/out -> "void*"
# SessionCount : DWORD* in/out -> "void*"
# SessionInfo : ISCSI_SESSION_INFOA* in/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 "iscsidsc" fn GetIScsiSessionListA(
    BufferSize: [*c]u32, // DWORD* in/out
    SessionCount: [*c]u32, // DWORD* in/out
    SessionInfo: [*c]ISCSI_SESSION_INFOA // ISCSI_SESSION_INFOA* in/out
) callconv(std.os.windows.WINAPI) u32;

proc GetIScsiSessionListA(
    BufferSize: ptr uint32,  # DWORD* in/out
    SessionCount: ptr uint32,  # DWORD* in/out
    SessionInfo: ptr ISCSI_SESSION_INFOA  # ISCSI_SESSION_INFOA* in/out
): uint32 {.importc: "GetIScsiSessionListA", stdcall, dynlib: "ISCSIDSC.dll".}

pragma(lib, "iscsidsc");
extern(Windows)
uint GetIScsiSessionListA(
    uint* BufferSize,   // DWORD* in/out
    uint* SessionCount,   // DWORD* in/out
    ISCSI_SESSION_INFOA* SessionInfo   // ISCSI_SESSION_INFOA* in/out
);

ccall((:GetIScsiSessionListA, "ISCSIDSC.dll"), stdcall, UInt32,
      (Ptr{UInt32}, Ptr{UInt32}, Ptr{ISCSI_SESSION_INFOA}),
      BufferSize, SessionCount, SessionInfo)
# BufferSize : DWORD* in/out -> Ptr{UInt32}
# SessionCount : DWORD* in/out -> Ptr{UInt32}
# SessionInfo : ISCSI_SESSION_INFOA* in/out -> Ptr{ISCSI_SESSION_INFOA}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t GetIScsiSessionListA(
    uint32_t* BufferSize,
    uint32_t* SessionCount,
    void* SessionInfo);
]]
local iscsidsc = ffi.load("iscsidsc")
-- iscsidsc.GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo)
-- BufferSize : DWORD* in/out
-- SessionCount : DWORD* in/out
-- SessionInfo : ISCSI_SESSION_INFOA* in/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('ISCSIDSC.dll');
const GetIScsiSessionListA = lib.func('__stdcall', 'GetIScsiSessionListA', 'uint32_t', ['uint32_t *', 'uint32_t *', 'void *']);
// GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo)
// BufferSize : DWORD* in/out -> 'uint32_t *'
// SessionCount : DWORD* in/out -> 'uint32_t *'
// SessionInfo : ISCSI_SESSION_INFOA* in/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("ISCSIDSC.dll", {
  GetIScsiSessionListA: { parameters: ["pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo)
// BufferSize : DWORD* in/out -> "pointer"
// SessionCount : DWORD* in/out -> "pointer"
// SessionInfo : ISCSI_SESSION_INFOA* in/out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t GetIScsiSessionListA(
    uint32_t* BufferSize,
    uint32_t* SessionCount,
    void* SessionInfo);
C, "ISCSIDSC.dll");
// $ffi->GetIScsiSessionListA(BufferSize, SessionCount, SessionInfo);
// BufferSize : DWORD* in/out
// SessionCount : DWORD* in/out
// SessionInfo : ISCSI_SESSION_INFOA* in/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 Iscsidsc extends StdCallLibrary {
    Iscsidsc INSTANCE = Native.load("iscsidsc", Iscsidsc.class, W32APIOptions.ASCII_OPTIONS);
    int GetIScsiSessionListA(
        IntByReference BufferSize,   // DWORD* in/out
        IntByReference SessionCount,   // DWORD* in/out
        Pointer SessionInfo   // ISCSI_SESSION_INFOA* in/out
    );
}

@[Link("iscsidsc")]
lib LibISCSIDSC
  fun GetIScsiSessionListA = GetIScsiSessionListA(
    BufferSize : UInt32*,   # DWORD* in/out
    SessionCount : UInt32*,   # DWORD* in/out
    SessionInfo : ISCSI_SESSION_INFOA*   # ISCSI_SESSION_INFOA* in/out
  ) : UInt32
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 GetIScsiSessionListANative = Uint32 Function(Pointer<Uint32>, Pointer<Uint32>, Pointer<Void>);
typedef GetIScsiSessionListADart = int Function(Pointer<Uint32>, Pointer<Uint32>, Pointer<Void>);
final GetIScsiSessionListA = DynamicLibrary.open('ISCSIDSC.dll')
    .lookupFunction<GetIScsiSessionListANative, GetIScsiSessionListADart>('GetIScsiSessionListA');
// BufferSize : DWORD* in/out -> Pointer<Uint32>
// SessionCount : DWORD* in/out -> Pointer<Uint32>
// SessionInfo : ISCSI_SESSION_INFOA* in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetIScsiSessionListA(
  BufferSize: Pointer;   // DWORD* in/out
  SessionCount: Pointer;   // DWORD* in/out
  SessionInfo: Pointer   // ISCSI_SESSION_INFOA* in/out
): DWORD; stdcall;
  external 'ISCSIDSC.dll' name 'GetIScsiSessionListA';

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

foreign import stdcall safe "GetIScsiSessionListA"
  c_GetIScsiSessionListA :: Ptr Word32 -> Ptr Word32 -> Ptr () -> IO Word32
-- BufferSize : DWORD* in/out -> Ptr Word32
-- SessionCount : DWORD* in/out -> Ptr Word32
-- SessionInfo : ISCSI_SESSION_INFOA* in/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 getiscsisessionlista =
  foreign "GetIScsiSessionListA"
    ((ptr uint32_t) @-> (ptr uint32_t) @-> (ptr void) @-> returning uint32_t)
(* BufferSize : DWORD* in/out -> (ptr uint32_t) *)
(* SessionCount : DWORD* in/out -> (ptr uint32_t) *)
(* SessionInfo : ISCSI_SESSION_INFOA* in/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 iscsidsc (t "ISCSIDSC.dll"))
(cffi:use-foreign-library iscsidsc)

(cffi:defcfun ("GetIScsiSessionListA" get-iscsi-session-list-a :convention :stdcall) :uint32
  (buffer-size :pointer)   ; DWORD* in/out
  (session-count :pointer)   ; DWORD* in/out
  (session-info :pointer))   ; ISCSI_SESSION_INFOA* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetIScsiSessionListA = Win32::API::More->new('ISCSIDSC',
    'DWORD GetIScsiSessionListA(LPVOID BufferSize, LPVOID SessionCount, LPVOID SessionInfo)');
# my $ret = $GetIScsiSessionListA->Call($BufferSize, $SessionCount, $SessionInfo);
# BufferSize : DWORD* in/out -> LPVOID
# SessionCount : DWORD* in/out -> LPVOID
# SessionInfo : ISCSI_SESSION_INFOA* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。