DiscardVirtualMemory

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

DWORD DiscardVirtualMemory(
    void* VirtualAddress,
    UINT_PTR Size
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function DiscardVirtualMemory(
    VirtualAddress As IntPtr,   ' void* in/out
    Size As UIntPtr   ' UINT_PTR
) As UInteger
End Function

' VirtualAddress : void* in/out
' Size : UINT_PTR
Declare PtrSafe Function DiscardVirtualMemory Lib "kernel32" ( _
    ByVal VirtualAddress As LongPtr, _
    ByVal Size 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

DiscardVirtualMemory = ctypes.windll.kernel32.DiscardVirtualMemory
DiscardVirtualMemory.restype = wintypes.DWORD
DiscardVirtualMemory.argtypes = [
    ctypes.POINTER(None),  # VirtualAddress : void* in/out
    ctypes.c_size_t,  # Size : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
DiscardVirtualMemory = Fiddle::Function.new(
  lib['DiscardVirtualMemory'],
  [
    Fiddle::TYPE_VOIDP,  # VirtualAddress : void* in/out
    Fiddle::TYPE_UINTPTR_T,  # Size : UINT_PTR
  ],
  -Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern uint DiscardVirtualMemory(IntPtr VirtualAddress, UIntPtr Size);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_DiscardVirtualMemory' -Namespace Win32 -PassThru
# $api::DiscardVirtualMemory(VirtualAddress, Size)

#uselib "KERNEL32.dll"
#func global DiscardVirtualMemory "DiscardVirtualMemory" sptr, sptr
; DiscardVirtualMemory VirtualAddress, Size   ; 戻り値は stat
; VirtualAddress : void* in/out -> "sptr"
; Size : UINT_PTR -> "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 DiscardVirtualMemory "DiscardVirtualMemory" sptr, sptr
; res = DiscardVirtualMemory(VirtualAddress, Size)
; VirtualAddress : void* in/out -> "sptr"
; Size : UINT_PTR -> "sptr"

; DWORD DiscardVirtualMemory(void* VirtualAddress, UINT_PTR Size)
#uselib "KERNEL32.dll"
#cfunc global DiscardVirtualMemory "DiscardVirtualMemory" intptr, intptr
; res = DiscardVirtualMemory(VirtualAddress, Size)
; VirtualAddress : void* in/out -> "intptr"
; Size : UINT_PTR -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procDiscardVirtualMemory = kernel32.NewProc("DiscardVirtualMemory")
)

// VirtualAddress (void* in/out), Size (UINT_PTR)
r1, _, err := procDiscardVirtualMemory.Call(
	uintptr(VirtualAddress),
	uintptr(Size),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DiscardVirtualMemory(
  VirtualAddress: Pointer;   // void* in/out
  Size: NativeUInt   // UINT_PTR
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'DiscardVirtualMemory';

result := DllCall("KERNEL32\DiscardVirtualMemory"
    , "Ptr", VirtualAddress   ; void* in/out
    , "UPtr", Size   ; UINT_PTR
    , "UInt")   ; return: DWORD

●DiscardVirtualMemory(VirtualAddress, Size) = DLL("KERNEL32.dll", "dword DiscardVirtualMemory(void*, int)")
# 呼び出し: DiscardVirtualMemory(VirtualAddress, Size)
# VirtualAddress : void* in/out -> "void*"
# Size : UINT_PTR -> "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 DiscardVirtualMemory(
    VirtualAddress: ?*anyopaque, // void* in/out
    Size: usize // UINT_PTR
) callconv(std.os.windows.WINAPI) u32;

proc DiscardVirtualMemory(
    VirtualAddress: pointer,  # void* in/out
    Size: uint  # UINT_PTR
): uint32 {.importc: "DiscardVirtualMemory", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
uint DiscardVirtualMemory(
    void* VirtualAddress,   // void* in/out
    size_t Size   // UINT_PTR
);

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

local ffi = require("ffi")
ffi.cdef[[
uint32_t DiscardVirtualMemory(
    void* VirtualAddress,
    uintptr_t Size);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.DiscardVirtualMemory(VirtualAddress, Size)
-- VirtualAddress : void* in/out
-- Size : UINT_PTR
-- 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 DiscardVirtualMemory = lib.func('__stdcall', 'DiscardVirtualMemory', 'uint32_t', ['void *', 'uintptr_t']);
// DiscardVirtualMemory(VirtualAddress, Size)
// VirtualAddress : void* in/out -> 'void *'
// Size : UINT_PTR -> 'uintptr_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", {
  DiscardVirtualMemory: { parameters: ["pointer", "usize"], result: "u32" },
});
// lib.symbols.DiscardVirtualMemory(VirtualAddress, Size)
// VirtualAddress : void* in/out -> "pointer"
// Size : UINT_PTR -> "usize"
// 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
uint32_t DiscardVirtualMemory(
    void* VirtualAddress,
    size_t Size);
C, "KERNEL32.dll");
// $ffi->DiscardVirtualMemory(VirtualAddress, Size);
// VirtualAddress : void* in/out
// Size : UINT_PTR
// 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 DiscardVirtualMemory(
        Pointer VirtualAddress,   // void* in/out
        long Size   // UINT_PTR
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun DiscardVirtualMemory = DiscardVirtualMemory(
    VirtualAddress : Void*,   # void* in/out
    Size : LibC::SizeT   # UINT_PTR
  ) : 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 DiscardVirtualMemoryNative = Uint32 Function(Pointer<Void>, UintPtr);
typedef DiscardVirtualMemoryDart = int Function(Pointer<Void>, int);
final DiscardVirtualMemory = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<DiscardVirtualMemoryNative, DiscardVirtualMemoryDart>('DiscardVirtualMemory');
// VirtualAddress : void* in/out -> Pointer<Void>
// Size : UINT_PTR -> UintPtr
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DiscardVirtualMemory(
  VirtualAddress: Pointer;   // void* in/out
  Size: NativeUInt   // UINT_PTR
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'DiscardVirtualMemory';

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

foreign import stdcall safe "DiscardVirtualMemory"
  c_DiscardVirtualMemory :: Ptr () -> CUIntPtr -> IO Word32
-- VirtualAddress : void* in/out -> Ptr ()
-- Size : UINT_PTR -> CUIntPtr
-- 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 discardvirtualmemory =
  foreign "DiscardVirtualMemory"
    ((ptr void) @-> size_t @-> returning uint32_t)
(* VirtualAddress : void* in/out -> (ptr void) *)
(* Size : UINT_PTR -> size_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 ("DiscardVirtualMemory" discard-virtual-memory :convention :stdcall) :uint32
  (virtual-address :pointer)   ; void* in/out
  (size :uint64))   ; UINT_PTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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