VirtualFree

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

BOOL VirtualFree(
    void* lpAddress,
    UINT_PTR dwSize,
    VIRTUAL_FREE_TYPE dwFreeType
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function VirtualFree(
    lpAddress As IntPtr,   ' void* in/out
    dwSize As UIntPtr,   ' UINT_PTR
    dwFreeType As UInteger   ' VIRTUAL_FREE_TYPE
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' lpAddress : void* in/out
' dwSize : UINT_PTR
' dwFreeType : VIRTUAL_FREE_TYPE
Declare PtrSafe Function VirtualFree Lib "kernel32" ( _
    ByVal lpAddress As LongPtr, _
    ByVal dwSize As LongPtr, _
    ByVal dwFreeType 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

VirtualFree = ctypes.windll.kernel32.VirtualFree
VirtualFree.restype = wintypes.BOOL
VirtualFree.argtypes = [
    ctypes.POINTER(None),  # lpAddress : void* in/out
    ctypes.c_size_t,  # dwSize : UINT_PTR
    wintypes.DWORD,  # dwFreeType : VIRTUAL_FREE_TYPE
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
VirtualFree = Fiddle::Function.new(
  lib['VirtualFree'],
  [
    Fiddle::TYPE_VOIDP,  # lpAddress : void* in/out
    Fiddle::TYPE_UINTPTR_T,  # dwSize : UINT_PTR
    -Fiddle::TYPE_INT,  # dwFreeType : VIRTUAL_FREE_TYPE
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn VirtualFree(
        lpAddress: *mut (),  // void* in/out
        dwSize: usize,  // UINT_PTR
        dwFreeType: u32  // VIRTUAL_FREE_TYPE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool VirtualFree(IntPtr lpAddress, UIntPtr dwSize, uint dwFreeType);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_VirtualFree' -Namespace Win32 -PassThru
# $api::VirtualFree(lpAddress, dwSize, dwFreeType)

#uselib "KERNEL32.dll"
#func global VirtualFree "VirtualFree" sptr, sptr, sptr
; VirtualFree lpAddress, dwSize, dwFreeType   ; 戻り値は stat
; lpAddress : void* in/out -> "sptr"
; dwSize : UINT_PTR -> "sptr"
; dwFreeType : VIRTUAL_FREE_TYPE -> "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。

#uselib "KERNEL32.dll"
#cfunc global VirtualFree "VirtualFree" sptr, sptr, int
; res = VirtualFree(lpAddress, dwSize, dwFreeType)
; lpAddress : void* in/out -> "sptr"
; dwSize : UINT_PTR -> "sptr"
; dwFreeType : VIRTUAL_FREE_TYPE -> "int"

; BOOL VirtualFree(void* lpAddress, UINT_PTR dwSize, VIRTUAL_FREE_TYPE dwFreeType)
#uselib "KERNEL32.dll"
#cfunc global VirtualFree "VirtualFree" intptr, intptr, int
; res = VirtualFree(lpAddress, dwSize, dwFreeType)
; lpAddress : void* in/out -> "intptr"
; dwSize : UINT_PTR -> "intptr"
; dwFreeType : VIRTUAL_FREE_TYPE -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procVirtualFree = kernel32.NewProc("VirtualFree")
)

// lpAddress (void* in/out), dwSize (UINT_PTR), dwFreeType (VIRTUAL_FREE_TYPE)
r1, _, err := procVirtualFree.Call(
	uintptr(lpAddress),
	uintptr(dwSize),
	uintptr(dwFreeType),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function VirtualFree(
  lpAddress: Pointer;   // void* in/out
  dwSize: NativeUInt;   // UINT_PTR
  dwFreeType: DWORD   // VIRTUAL_FREE_TYPE
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'VirtualFree';

result := DllCall("KERNEL32\VirtualFree"
    , "Ptr", lpAddress   ; void* in/out
    , "UPtr", dwSize   ; UINT_PTR
    , "UInt", dwFreeType   ; VIRTUAL_FREE_TYPE
    , "Int")   ; return: BOOL

●VirtualFree(lpAddress, dwSize, dwFreeType) = DLL("KERNEL32.dll", "bool VirtualFree(void*, int, dword)")
# 呼び出し: VirtualFree(lpAddress, dwSize, dwFreeType)
# lpAddress : void* in/out -> "void*"
# dwSize : UINT_PTR -> "int"
# dwFreeType : VIRTUAL_FREE_TYPE -> "dword"
# 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 VirtualFree(
    lpAddress: ?*anyopaque, // void* in/out
    dwSize: usize, // UINT_PTR
    dwFreeType: u32 // VIRTUAL_FREE_TYPE
) callconv(std.os.windows.WINAPI) i32;

proc VirtualFree(
    lpAddress: pointer,  # void* in/out
    dwSize: uint,  # UINT_PTR
    dwFreeType: uint32  # VIRTUAL_FREE_TYPE
): int32 {.importc: "VirtualFree", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int VirtualFree(
    void* lpAddress,   // void* in/out
    size_t dwSize,   // UINT_PTR
    uint dwFreeType   // VIRTUAL_FREE_TYPE
);

ccall((:VirtualFree, "KERNEL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Csize_t, UInt32),
      lpAddress, dwSize, dwFreeType)
# lpAddress : void* in/out -> Ptr{Cvoid}
# dwSize : UINT_PTR -> Csize_t
# dwFreeType : VIRTUAL_FREE_TYPE -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VirtualFree(
    void* lpAddress,
    uintptr_t dwSize,
    uint32_t dwFreeType);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.VirtualFree(lpAddress, dwSize, dwFreeType)
-- lpAddress : void* in/out
-- dwSize : UINT_PTR
-- dwFreeType : VIRTUAL_FREE_TYPE
-- 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 VirtualFree = lib.func('__stdcall', 'VirtualFree', 'int32_t', ['void *', 'uintptr_t', 'uint32_t']);
// VirtualFree(lpAddress, dwSize, dwFreeType)
// lpAddress : void* in/out -> 'void *'
// dwSize : UINT_PTR -> 'uintptr_t'
// dwFreeType : VIRTUAL_FREE_TYPE -> 'uint32_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", {
  VirtualFree: { parameters: ["pointer", "usize", "u32"], result: "i32" },
});
// lib.symbols.VirtualFree(lpAddress, dwSize, dwFreeType)
// lpAddress : void* in/out -> "pointer"
// dwSize : UINT_PTR -> "usize"
// dwFreeType : VIRTUAL_FREE_TYPE -> "u32"
// 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 VirtualFree(
    void* lpAddress,
    size_t dwSize,
    uint32_t dwFreeType);
C, "KERNEL32.dll");
// $ffi->VirtualFree(lpAddress, dwSize, dwFreeType);
// lpAddress : void* in/out
// dwSize : UINT_PTR
// dwFreeType : VIRTUAL_FREE_TYPE
// 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);
    boolean VirtualFree(
        Pointer lpAddress,   // void* in/out
        long dwSize,   // UINT_PTR
        int dwFreeType   // VIRTUAL_FREE_TYPE
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun VirtualFree = VirtualFree(
    lpAddress : Void*,   # void* in/out
    dwSize : LibC::SizeT,   # UINT_PTR
    dwFreeType : UInt32   # VIRTUAL_FREE_TYPE
  ) : 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 VirtualFreeNative = Int32 Function(Pointer<Void>, UintPtr, Uint32);
typedef VirtualFreeDart = int Function(Pointer<Void>, int, int);
final VirtualFree = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<VirtualFreeNative, VirtualFreeDart>('VirtualFree');
// lpAddress : void* in/out -> Pointer<Void>
// dwSize : UINT_PTR -> UintPtr
// dwFreeType : VIRTUAL_FREE_TYPE -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VirtualFree(
  lpAddress: Pointer;   // void* in/out
  dwSize: NativeUInt;   // UINT_PTR
  dwFreeType: DWORD   // VIRTUAL_FREE_TYPE
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'VirtualFree';

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

foreign import stdcall safe "VirtualFree"
  c_VirtualFree :: Ptr () -> CUIntPtr -> Word32 -> IO CInt
-- lpAddress : void* in/out -> Ptr ()
-- dwSize : UINT_PTR -> CUIntPtr
-- dwFreeType : VIRTUAL_FREE_TYPE -> Word32
-- 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 virtualfree =
  foreign "VirtualFree"
    ((ptr void) @-> size_t @-> uint32_t @-> returning int32_t)
(* lpAddress : void* in/out -> (ptr void) *)
(* dwSize : UINT_PTR -> size_t *)
(* dwFreeType : VIRTUAL_FREE_TYPE -> uint32_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 ("VirtualFree" virtual-free :convention :stdcall) :int32
  (lp-address :pointer)   ; void* in/out
  (dw-size :uint64)   ; UINT_PTR
  (dw-free-type :uint32))   ; VIRTUAL_FREE_TYPE
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VirtualFree = Win32::API::More->new('KERNEL32',
    'BOOL VirtualFree(LPVOID lpAddress, WPARAM dwSize, DWORD dwFreeType)');
# my $ret = $VirtualFree->Call($lpAddress, $dwSize, $dwFreeType);
# lpAddress : void* in/out -> LPVOID
# dwSize : UINT_PTR -> WPARAM
# dwFreeType : VIRTUAL_FREE_TYPE -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。