WebSocketGetAction

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

HRESULT WebSocketGetAction(
    WEB_SOCKET_HANDLE hWebSocket,
    WEB_SOCKET_ACTION_QUEUE eActionQueue,
    WEB_SOCKET_BUFFER* pDataBuffers,
    DWORD* pulDataBufferCount,
    WEB_SOCKET_ACTION* pAction,
    WEB_SOCKET_BUFFER_TYPE* pBufferType,
    void** pvApplicationContext,   // optional
    void** pvActionContext
);

<DllImport("websocket.dll", ExactSpelling:=True)>
Public Shared Function WebSocketGetAction(
    hWebSocket As IntPtr,   ' WEB_SOCKET_HANDLE
    eActionQueue As Integer,   ' WEB_SOCKET_ACTION_QUEUE
    pDataBuffers As IntPtr,   ' WEB_SOCKET_BUFFER* in/out
    ByRef pulDataBufferCount As UInteger,   ' DWORD* in/out
    <Out> ByRef pAction As Integer,   ' WEB_SOCKET_ACTION* out
    <Out> ByRef pBufferType As Integer,   ' WEB_SOCKET_BUFFER_TYPE* out
    pvApplicationContext As IntPtr,   ' void** optional, out
    pvActionContext As IntPtr   ' void** out
) As Integer
End Function

' hWebSocket : WEB_SOCKET_HANDLE
' eActionQueue : WEB_SOCKET_ACTION_QUEUE
' pDataBuffers : WEB_SOCKET_BUFFER* in/out
' pulDataBufferCount : DWORD* in/out
' pAction : WEB_SOCKET_ACTION* out
' pBufferType : WEB_SOCKET_BUFFER_TYPE* out
' pvApplicationContext : void** optional, out
' pvActionContext : void** out
Declare PtrSafe Function WebSocketGetAction Lib "websocket" ( _
    ByVal hWebSocket As LongPtr, _
    ByVal eActionQueue As Long, _
    ByVal pDataBuffers As LongPtr, _
    ByRef pulDataBufferCount As Long, _
    ByRef pAction As Long, _
    ByRef pBufferType As Long, _
    ByVal pvApplicationContext As LongPtr, _
    ByVal pvActionContext 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

WebSocketGetAction = ctypes.windll.websocket.WebSocketGetAction
WebSocketGetAction.restype = ctypes.c_int
WebSocketGetAction.argtypes = [
    wintypes.HANDLE,  # hWebSocket : WEB_SOCKET_HANDLE
    ctypes.c_int,  # eActionQueue : WEB_SOCKET_ACTION_QUEUE
    ctypes.c_void_p,  # pDataBuffers : WEB_SOCKET_BUFFER* in/out
    ctypes.POINTER(wintypes.DWORD),  # pulDataBufferCount : DWORD* in/out
    ctypes.c_void_p,  # pAction : WEB_SOCKET_ACTION* out
    ctypes.c_void_p,  # pBufferType : WEB_SOCKET_BUFFER_TYPE* out
    ctypes.c_void_p,  # pvApplicationContext : void** optional, out
    ctypes.c_void_p,  # pvActionContext : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('websocket.dll')
WebSocketGetAction = Fiddle::Function.new(
  lib['WebSocketGetAction'],
  [
    Fiddle::TYPE_VOIDP,  # hWebSocket : WEB_SOCKET_HANDLE
    Fiddle::TYPE_INT,  # eActionQueue : WEB_SOCKET_ACTION_QUEUE
    Fiddle::TYPE_VOIDP,  # pDataBuffers : WEB_SOCKET_BUFFER* in/out
    Fiddle::TYPE_VOIDP,  # pulDataBufferCount : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pAction : WEB_SOCKET_ACTION* out
    Fiddle::TYPE_VOIDP,  # pBufferType : WEB_SOCKET_BUFFER_TYPE* out
    Fiddle::TYPE_VOIDP,  # pvApplicationContext : void** optional, out
    Fiddle::TYPE_VOIDP,  # pvActionContext : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "websocket")]
extern "system" {
    fn WebSocketGetAction(
        hWebSocket: *mut core::ffi::c_void,  // WEB_SOCKET_HANDLE
        eActionQueue: i32,  // WEB_SOCKET_ACTION_QUEUE
        pDataBuffers: *mut WEB_SOCKET_BUFFER,  // WEB_SOCKET_BUFFER* in/out
        pulDataBufferCount: *mut u32,  // DWORD* in/out
        pAction: *mut i32,  // WEB_SOCKET_ACTION* out
        pBufferType: *mut i32,  // WEB_SOCKET_BUFFER_TYPE* out
        pvApplicationContext: *mut *mut (),  // void** optional, out
        pvActionContext: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("websocket.dll")]
public static extern int WebSocketGetAction(IntPtr hWebSocket, int eActionQueue, IntPtr pDataBuffers, ref uint pulDataBufferCount, out int pAction, out int pBufferType, IntPtr pvApplicationContext, IntPtr pvActionContext);
"@
$api = Add-Type -MemberDefinition $sig -Name 'websocket_WebSocketGetAction' -Namespace Win32 -PassThru
# $api::WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)

#uselib "websocket.dll"
#func global WebSocketGetAction "WebSocketGetAction" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; WebSocketGetAction hWebSocket, eActionQueue, varptr(pDataBuffers), varptr(pulDataBufferCount), varptr(pAction), varptr(pBufferType), pvApplicationContext, pvActionContext   ; 戻り値は stat
; hWebSocket : WEB_SOCKET_HANDLE -> "sptr"
; eActionQueue : WEB_SOCKET_ACTION_QUEUE -> "sptr"
; pDataBuffers : WEB_SOCKET_BUFFER* in/out -> "sptr"
; pulDataBufferCount : DWORD* in/out -> "sptr"
; pAction : WEB_SOCKET_ACTION* out -> "sptr"
; pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> "sptr"
; pvApplicationContext : void** optional, out -> "sptr"
; pvActionContext : void** 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 (
	websocket = windows.NewLazySystemDLL("websocket.dll")
	procWebSocketGetAction = websocket.NewProc("WebSocketGetAction")
)

// hWebSocket (WEB_SOCKET_HANDLE), eActionQueue (WEB_SOCKET_ACTION_QUEUE), pDataBuffers (WEB_SOCKET_BUFFER* in/out), pulDataBufferCount (DWORD* in/out), pAction (WEB_SOCKET_ACTION* out), pBufferType (WEB_SOCKET_BUFFER_TYPE* out), pvApplicationContext (void** optional, out), pvActionContext (void** out)
r1, _, err := procWebSocketGetAction.Call(
	uintptr(hWebSocket),
	uintptr(eActionQueue),
	uintptr(pDataBuffers),
	uintptr(pulDataBufferCount),
	uintptr(pAction),
	uintptr(pBufferType),
	uintptr(pvApplicationContext),
	uintptr(pvActionContext),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WebSocketGetAction(
  hWebSocket: THandle;   // WEB_SOCKET_HANDLE
  eActionQueue: Integer;   // WEB_SOCKET_ACTION_QUEUE
  pDataBuffers: Pointer;   // WEB_SOCKET_BUFFER* in/out
  pulDataBufferCount: Pointer;   // DWORD* in/out
  pAction: Pointer;   // WEB_SOCKET_ACTION* out
  pBufferType: Pointer;   // WEB_SOCKET_BUFFER_TYPE* out
  pvApplicationContext: Pointer;   // void** optional, out
  pvActionContext: Pointer   // void** out
): Integer; stdcall;
  external 'websocket.dll' name 'WebSocketGetAction';

result := DllCall("websocket\WebSocketGetAction"
    , "Ptr", hWebSocket   ; WEB_SOCKET_HANDLE
    , "Int", eActionQueue   ; WEB_SOCKET_ACTION_QUEUE
    , "Ptr", pDataBuffers   ; WEB_SOCKET_BUFFER* in/out
    , "Ptr", pulDataBufferCount   ; DWORD* in/out
    , "Ptr", pAction   ; WEB_SOCKET_ACTION* out
    , "Ptr", pBufferType   ; WEB_SOCKET_BUFFER_TYPE* out
    , "Ptr", pvApplicationContext   ; void** optional, out
    , "Ptr", pvActionContext   ; void** out
    , "Int")   ; return: HRESULT

●WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext) = DLL("websocket.dll", "int WebSocketGetAction(void*, int, void*, void*, void*, void*, void*, void*)")
# 呼び出し: WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)
# hWebSocket : WEB_SOCKET_HANDLE -> "void*"
# eActionQueue : WEB_SOCKET_ACTION_QUEUE -> "int"
# pDataBuffers : WEB_SOCKET_BUFFER* in/out -> "void*"
# pulDataBufferCount : DWORD* in/out -> "void*"
# pAction : WEB_SOCKET_ACTION* out -> "void*"
# pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> "void*"
# pvApplicationContext : void** optional, out -> "void*"
# pvActionContext : void** 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 "websocket" fn WebSocketGetAction(
    hWebSocket: ?*anyopaque, // WEB_SOCKET_HANDLE
    eActionQueue: i32, // WEB_SOCKET_ACTION_QUEUE
    pDataBuffers: [*c]WEB_SOCKET_BUFFER, // WEB_SOCKET_BUFFER* in/out
    pulDataBufferCount: [*c]u32, // DWORD* in/out
    pAction: [*c]i32, // WEB_SOCKET_ACTION* out
    pBufferType: [*c]i32, // WEB_SOCKET_BUFFER_TYPE* out
    pvApplicationContext: ?*anyopaque, // void** optional, out
    pvActionContext: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) i32;

proc WebSocketGetAction(
    hWebSocket: pointer,  # WEB_SOCKET_HANDLE
    eActionQueue: int32,  # WEB_SOCKET_ACTION_QUEUE
    pDataBuffers: ptr WEB_SOCKET_BUFFER,  # WEB_SOCKET_BUFFER* in/out
    pulDataBufferCount: ptr uint32,  # DWORD* in/out
    pAction: ptr int32,  # WEB_SOCKET_ACTION* out
    pBufferType: ptr int32,  # WEB_SOCKET_BUFFER_TYPE* out
    pvApplicationContext: pointer,  # void** optional, out
    pvActionContext: pointer  # void** out
): int32 {.importc: "WebSocketGetAction", stdcall, dynlib: "websocket.dll".}

pragma(lib, "websocket");
extern(Windows)
int WebSocketGetAction(
    void* hWebSocket,   // WEB_SOCKET_HANDLE
    int eActionQueue,   // WEB_SOCKET_ACTION_QUEUE
    WEB_SOCKET_BUFFER* pDataBuffers,   // WEB_SOCKET_BUFFER* in/out
    uint* pulDataBufferCount,   // DWORD* in/out
    int* pAction,   // WEB_SOCKET_ACTION* out
    int* pBufferType,   // WEB_SOCKET_BUFFER_TYPE* out
    void** pvApplicationContext,   // void** optional, out
    void** pvActionContext   // void** out
);

ccall((:WebSocketGetAction, "websocket.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Int32, Ptr{WEB_SOCKET_BUFFER}, Ptr{UInt32}, Ptr{Int32}, Ptr{Int32}, Ptr{Cvoid}, Ptr{Cvoid}),
      hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)
# hWebSocket : WEB_SOCKET_HANDLE -> Ptr{Cvoid}
# eActionQueue : WEB_SOCKET_ACTION_QUEUE -> Int32
# pDataBuffers : WEB_SOCKET_BUFFER* in/out -> Ptr{WEB_SOCKET_BUFFER}
# pulDataBufferCount : DWORD* in/out -> Ptr{UInt32}
# pAction : WEB_SOCKET_ACTION* out -> Ptr{Int32}
# pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> Ptr{Int32}
# pvApplicationContext : void** optional, out -> Ptr{Cvoid}
# pvActionContext : void** out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t WebSocketGetAction(
    void* hWebSocket,
    int32_t eActionQueue,
    void* pDataBuffers,
    uint32_t* pulDataBufferCount,
    int32_t* pAction,
    int32_t* pBufferType,
    void** pvApplicationContext,
    void** pvActionContext);
]]
local websocket = ffi.load("websocket")
-- websocket.WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)
-- hWebSocket : WEB_SOCKET_HANDLE
-- eActionQueue : WEB_SOCKET_ACTION_QUEUE
-- pDataBuffers : WEB_SOCKET_BUFFER* in/out
-- pulDataBufferCount : DWORD* in/out
-- pAction : WEB_SOCKET_ACTION* out
-- pBufferType : WEB_SOCKET_BUFFER_TYPE* out
-- pvApplicationContext : void** optional, out
-- pvActionContext : void** 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('websocket.dll');
const WebSocketGetAction = lib.func('__stdcall', 'WebSocketGetAction', 'int32_t', ['void *', 'int32_t', 'void *', 'uint32_t *', 'int32_t *', 'int32_t *', 'void *', 'void *']);
// WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)
// hWebSocket : WEB_SOCKET_HANDLE -> 'void *'
// eActionQueue : WEB_SOCKET_ACTION_QUEUE -> 'int32_t'
// pDataBuffers : WEB_SOCKET_BUFFER* in/out -> 'void *'
// pulDataBufferCount : DWORD* in/out -> 'uint32_t *'
// pAction : WEB_SOCKET_ACTION* out -> 'int32_t *'
// pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> 'int32_t *'
// pvApplicationContext : void** optional, out -> 'void *'
// pvActionContext : void** 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("websocket.dll", {
  WebSocketGetAction: { parameters: ["pointer", "i32", "pointer", "pointer", "pointer", "pointer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext)
// hWebSocket : WEB_SOCKET_HANDLE -> "pointer"
// eActionQueue : WEB_SOCKET_ACTION_QUEUE -> "i32"
// pDataBuffers : WEB_SOCKET_BUFFER* in/out -> "pointer"
// pulDataBufferCount : DWORD* in/out -> "pointer"
// pAction : WEB_SOCKET_ACTION* out -> "pointer"
// pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> "pointer"
// pvApplicationContext : void** optional, out -> "pointer"
// pvActionContext : void** out -> "pointer"
// 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 WebSocketGetAction(
    void* hWebSocket,
    int32_t eActionQueue,
    void* pDataBuffers,
    uint32_t* pulDataBufferCount,
    int32_t* pAction,
    int32_t* pBufferType,
    void** pvApplicationContext,
    void** pvActionContext);
C, "websocket.dll");
// $ffi->WebSocketGetAction(hWebSocket, eActionQueue, pDataBuffers, pulDataBufferCount, pAction, pBufferType, pvApplicationContext, pvActionContext);
// hWebSocket : WEB_SOCKET_HANDLE
// eActionQueue : WEB_SOCKET_ACTION_QUEUE
// pDataBuffers : WEB_SOCKET_BUFFER* in/out
// pulDataBufferCount : DWORD* in/out
// pAction : WEB_SOCKET_ACTION* out
// pBufferType : WEB_SOCKET_BUFFER_TYPE* out
// pvApplicationContext : void** optional, out
// pvActionContext : void** 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 Websocket extends StdCallLibrary {
    Websocket INSTANCE = Native.load("websocket", Websocket.class);
    int WebSocketGetAction(
        Pointer hWebSocket,   // WEB_SOCKET_HANDLE
        int eActionQueue,   // WEB_SOCKET_ACTION_QUEUE
        Pointer pDataBuffers,   // WEB_SOCKET_BUFFER* in/out
        IntByReference pulDataBufferCount,   // DWORD* in/out
        IntByReference pAction,   // WEB_SOCKET_ACTION* out
        IntByReference pBufferType,   // WEB_SOCKET_BUFFER_TYPE* out
        Pointer pvApplicationContext,   // void** optional, out
        Pointer pvActionContext   // void** out
    );
}

@[Link("websocket")]
lib Libwebsocket
  fun WebSocketGetAction = WebSocketGetAction(
    hWebSocket : Void*,   # WEB_SOCKET_HANDLE
    eActionQueue : Int32,   # WEB_SOCKET_ACTION_QUEUE
    pDataBuffers : WEB_SOCKET_BUFFER*,   # WEB_SOCKET_BUFFER* in/out
    pulDataBufferCount : UInt32*,   # DWORD* in/out
    pAction : Int32*,   # WEB_SOCKET_ACTION* out
    pBufferType : Int32*,   # WEB_SOCKET_BUFFER_TYPE* out
    pvApplicationContext : Void**,   # void** optional, out
    pvActionContext : Void**   # void** out
  ) : 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 WebSocketGetActionNative = Int32 Function(Pointer<Void>, Int32, Pointer<Void>, Pointer<Uint32>, Pointer<Int32>, Pointer<Int32>, Pointer<Void>, Pointer<Void>);
typedef WebSocketGetActionDart = int Function(Pointer<Void>, int, Pointer<Void>, Pointer<Uint32>, Pointer<Int32>, Pointer<Int32>, Pointer<Void>, Pointer<Void>);
final WebSocketGetAction = DynamicLibrary.open('websocket.dll')
    .lookupFunction<WebSocketGetActionNative, WebSocketGetActionDart>('WebSocketGetAction');
// hWebSocket : WEB_SOCKET_HANDLE -> Pointer<Void>
// eActionQueue : WEB_SOCKET_ACTION_QUEUE -> Int32
// pDataBuffers : WEB_SOCKET_BUFFER* in/out -> Pointer<Void>
// pulDataBufferCount : DWORD* in/out -> Pointer<Uint32>
// pAction : WEB_SOCKET_ACTION* out -> Pointer<Int32>
// pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> Pointer<Int32>
// pvApplicationContext : void** optional, out -> Pointer<Void>
// pvActionContext : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WebSocketGetAction(
  hWebSocket: THandle;   // WEB_SOCKET_HANDLE
  eActionQueue: Integer;   // WEB_SOCKET_ACTION_QUEUE
  pDataBuffers: Pointer;   // WEB_SOCKET_BUFFER* in/out
  pulDataBufferCount: Pointer;   // DWORD* in/out
  pAction: Pointer;   // WEB_SOCKET_ACTION* out
  pBufferType: Pointer;   // WEB_SOCKET_BUFFER_TYPE* out
  pvApplicationContext: Pointer;   // void** optional, out
  pvActionContext: Pointer   // void** out
): Integer; stdcall;
  external 'websocket.dll' name 'WebSocketGetAction';

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

foreign import stdcall safe "WebSocketGetAction"
  c_WebSocketGetAction :: Ptr () -> Int32 -> Ptr () -> Ptr Word32 -> Ptr Int32 -> Ptr Int32 -> Ptr () -> Ptr () -> IO Int32
-- hWebSocket : WEB_SOCKET_HANDLE -> Ptr ()
-- eActionQueue : WEB_SOCKET_ACTION_QUEUE -> Int32
-- pDataBuffers : WEB_SOCKET_BUFFER* in/out -> Ptr ()
-- pulDataBufferCount : DWORD* in/out -> Ptr Word32
-- pAction : WEB_SOCKET_ACTION* out -> Ptr Int32
-- pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> Ptr Int32
-- pvApplicationContext : void** optional, out -> Ptr ()
-- pvActionContext : void** 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 websocketgetaction =
  foreign "WebSocketGetAction"
    ((ptr void) @-> int32_t @-> (ptr void) @-> (ptr uint32_t) @-> (ptr int32_t) @-> (ptr int32_t) @-> (ptr void) @-> (ptr void) @-> returning int32_t)
(* hWebSocket : WEB_SOCKET_HANDLE -> (ptr void) *)
(* eActionQueue : WEB_SOCKET_ACTION_QUEUE -> int32_t *)
(* pDataBuffers : WEB_SOCKET_BUFFER* in/out -> (ptr void) *)
(* pulDataBufferCount : DWORD* in/out -> (ptr uint32_t) *)
(* pAction : WEB_SOCKET_ACTION* out -> (ptr int32_t) *)
(* pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> (ptr int32_t) *)
(* pvApplicationContext : void** optional, out -> (ptr void) *)
(* pvActionContext : void** 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 websocket (t "websocket.dll"))
(cffi:use-foreign-library websocket)

(cffi:defcfun ("WebSocketGetAction" web-socket-get-action :convention :stdcall) :int32
  (h-web-socket :pointer)   ; WEB_SOCKET_HANDLE
  (e-action-queue :int32)   ; WEB_SOCKET_ACTION_QUEUE
  (p-data-buffers :pointer)   ; WEB_SOCKET_BUFFER* in/out
  (pul-data-buffer-count :pointer)   ; DWORD* in/out
  (p-action :pointer)   ; WEB_SOCKET_ACTION* out
  (p-buffer-type :pointer)   ; WEB_SOCKET_BUFFER_TYPE* out
  (pv-application-context :pointer)   ; void** optional, out
  (pv-action-context :pointer))   ; void** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WebSocketGetAction = Win32::API::More->new('websocket',
    'int WebSocketGetAction(HANDLE hWebSocket, int eActionQueue, LPVOID pDataBuffers, LPVOID pulDataBufferCount, LPVOID pAction, LPVOID pBufferType, LPVOID pvApplicationContext, LPVOID pvActionContext)');
# my $ret = $WebSocketGetAction->Call($hWebSocket, $eActionQueue, $pDataBuffers, $pulDataBufferCount, $pAction, $pBufferType, $pvApplicationContext, $pvActionContext);
# hWebSocket : WEB_SOCKET_HANDLE -> HANDLE
# eActionQueue : WEB_SOCKET_ACTION_QUEUE -> int
# pDataBuffers : WEB_SOCKET_BUFFER* in/out -> LPVOID
# pulDataBufferCount : DWORD* in/out -> LPVOID
# pAction : WEB_SOCKET_ACTION* out -> LPVOID
# pBufferType : WEB_SOCKET_BUFFER_TYPE* out -> LPVOID
# pvApplicationContext : void** optional, out -> LPVOID
# pvActionContext : void** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。