FlushViewOfFile

関数

マップされたビューの変更内容をディスク上のファイルへ書き込む。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

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

BOOL FlushViewOfFile(
    const void* lpBaseAddress,
    UINT_PTR dwNumberOfBytesToFlush
);

パラメーター

名前	型	方向
lpBaseAddress	void*	in
dwNumberOfBytesToFlush	UINT_PTR	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL FlushViewOfFile(
    const void* lpBaseAddress,
    UINT_PTR dwNumberOfBytesToFlush
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool FlushViewOfFile(
    IntPtr lpBaseAddress,   // void*
    UIntPtr dwNumberOfBytesToFlush   // UINT_PTR
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FlushViewOfFile(
    lpBaseAddress As IntPtr,   ' void*
    dwNumberOfBytesToFlush As UIntPtr   ' UINT_PTR
) As Boolean
End Function

' lpBaseAddress : void*
' dwNumberOfBytesToFlush : UINT_PTR
Declare PtrSafe Function FlushViewOfFile Lib "kernel32" ( _
    ByVal lpBaseAddress As LongPtr, _
    ByVal dwNumberOfBytesToFlush 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

FlushViewOfFile = ctypes.windll.kernel32.FlushViewOfFile
FlushViewOfFile.restype = wintypes.BOOL
FlushViewOfFile.argtypes = [
    ctypes.POINTER(None),  # lpBaseAddress : void*
    ctypes.c_size_t,  # dwNumberOfBytesToFlush : UINT_PTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FlushViewOfFile = Fiddle::Function.new(
  lib['FlushViewOfFile'],
  [
    Fiddle::TYPE_VOIDP,  # lpBaseAddress : void*
    Fiddle::TYPE_UINTPTR_T,  # dwNumberOfBytesToFlush : UINT_PTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn FlushViewOfFile(
        lpBaseAddress: *const (),  // void*
        dwNumberOfBytesToFlush: usize  // UINT_PTR
    ) -> 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 FlushViewOfFile(IntPtr lpBaseAddress, UIntPtr dwNumberOfBytesToFlush);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FlushViewOfFile' -Namespace Win32 -PassThru
# $api::FlushViewOfFile(lpBaseAddress, dwNumberOfBytesToFlush)

#uselib "KERNEL32.dll"
#func global FlushViewOfFile "FlushViewOfFile" sptr, sptr
; FlushViewOfFile lpBaseAddress, dwNumberOfBytesToFlush   ; 戻り値は stat
; lpBaseAddress : void* -> "sptr"
; dwNumberOfBytesToFlush : 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 FlushViewOfFile "FlushViewOfFile" sptr, sptr
; res = FlushViewOfFile(lpBaseAddress, dwNumberOfBytesToFlush)
; lpBaseAddress : void* -> "sptr"
; dwNumberOfBytesToFlush : UINT_PTR -> "sptr"

; BOOL FlushViewOfFile(void* lpBaseAddress, UINT_PTR dwNumberOfBytesToFlush)
#uselib "KERNEL32.dll"
#cfunc global FlushViewOfFile "FlushViewOfFile" intptr, intptr
; res = FlushViewOfFile(lpBaseAddress, dwNumberOfBytesToFlush)
; lpBaseAddress : void* -> "intptr"
; dwNumberOfBytesToFlush : UINT_PTR -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procFlushViewOfFile = kernel32.NewProc("FlushViewOfFile")
)

// lpBaseAddress (void*), dwNumberOfBytesToFlush (UINT_PTR)
r1, _, err := procFlushViewOfFile.Call(
	uintptr(lpBaseAddress),
	uintptr(dwNumberOfBytesToFlush),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FlushViewOfFile(
  lpBaseAddress: Pointer;   // void*
  dwNumberOfBytesToFlush: NativeUInt   // UINT_PTR
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'FlushViewOfFile';

result := DllCall("KERNEL32\FlushViewOfFile"
    , "Ptr", lpBaseAddress   ; void*
    , "UPtr", dwNumberOfBytesToFlush   ; UINT_PTR
    , "Int")   ; return: BOOL

●FlushViewOfFile(lpBaseAddress, dwNumberOfBytesToFlush) = DLL("KERNEL32.dll", "bool FlushViewOfFile(void*, int)")
# 呼び出し: FlushViewOfFile(lpBaseAddress, dwNumberOfBytesToFlush)
# lpBaseAddress : void* -> "void*"
# dwNumberOfBytesToFlush : 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)。