LocalSize

関数

ローカルメモリオブジェクトのサイズを取得する。

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>

UINT_PTR LocalSize(
    HLOCAL hMem
);

パラメーター

名前	型	方向
hMem	HLOCAL	in

戻り値の型: UINT_PTR

各言語での呼び出し定義

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

UINT_PTR LocalSize(
    HLOCAL hMem
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern UIntPtr LocalSize(
    IntPtr hMem   // HLOCAL
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function LocalSize(
    hMem As IntPtr   ' HLOCAL
) As UIntPtr
End Function

' hMem : HLOCAL
Declare PtrSafe Function LocalSize Lib "kernel32" ( _
    ByVal hMem As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

LocalSize = ctypes.windll.kernel32.LocalSize
LocalSize.restype = ctypes.c_size_t
LocalSize.argtypes = [
    wintypes.HANDLE,  # hMem : HLOCAL
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
LocalSize = Fiddle::Function.new(
  lib['LocalSize'],
  [
    Fiddle::TYPE_VOIDP,  # hMem : HLOCAL
  ],
  Fiddle::TYPE_UINTPTR_T)

#[link(name = "kernel32")]
extern "system" {
    fn LocalSize(
        hMem: *mut core::ffi::c_void  // HLOCAL
    ) -> usize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern UIntPtr LocalSize(IntPtr hMem);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_LocalSize' -Namespace Win32 -PassThru
# $api::LocalSize(hMem)

#uselib "KERNEL32.dll"
#func global LocalSize "LocalSize" sptr
; LocalSize hMem   ; 戻り値は stat
; hMem : HLOCAL -> "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 LocalSize "LocalSize" sptr
; res = LocalSize(hMem)
; hMem : HLOCAL -> "sptr"

; UINT_PTR LocalSize(HLOCAL hMem)
#uselib "KERNEL32.dll"
#cfunc global LocalSize "LocalSize" intptr
; res = LocalSize(hMem)
; hMem : HLOCAL -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procLocalSize = kernel32.NewProc("LocalSize")
)

// hMem (HLOCAL)
r1, _, err := procLocalSize.Call(
	uintptr(hMem),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UINT_PTR

function LocalSize(
  hMem: THandle   // HLOCAL
): NativeUInt; stdcall;
  external 'KERNEL32.dll' name 'LocalSize';

result := DllCall("KERNEL32\LocalSize"
    , "Ptr", hMem   ; HLOCAL
    , "UPtr")   ; return: UINT_PTR

●LocalSize(hMem) = DLL("KERNEL32.dll", "int LocalSize(void*)")
# 呼び出し: LocalSize(hMem)
# hMem : HLOCAL -> "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)。