SHUnlockShared

関数

共有メモリブロックのマッピングを解除する。

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

シグネチャ

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

BOOL SHUnlockShared(
    void* pvData
);

パラメーター

名前	型	方向
pvData	void*	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL SHUnlockShared(
    void* pvData
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHLWAPI.dll", SetLastError = true, ExactSpelling = true)]
static extern bool SHUnlockShared(
    IntPtr pvData   // void*
);

<DllImport("SHLWAPI.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SHUnlockShared(
    pvData As IntPtr   ' void*
) As Boolean
End Function

' pvData : void*
Declare PtrSafe Function SHUnlockShared Lib "shlwapi" ( _
    ByVal pvData 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

SHUnlockShared = ctypes.windll.shlwapi.SHUnlockShared
SHUnlockShared.restype = wintypes.BOOL
SHUnlockShared.argtypes = [
    ctypes.POINTER(None),  # pvData : void*
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHUnlockShared = Fiddle::Function.new(
  lib['SHUnlockShared'],
  [
    Fiddle::TYPE_VOIDP,  # pvData : void*
  ],
  Fiddle::TYPE_INT)

#[link(name = "shlwapi")]
extern "system" {
    fn SHUnlockShared(
        pvData: *mut ()  // void*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHLWAPI.dll", SetLastError = true)]
public static extern bool SHUnlockShared(IntPtr pvData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHUnlockShared' -Namespace Win32 -PassThru
# $api::SHUnlockShared(pvData)

#uselib "SHLWAPI.dll"
#func global SHUnlockShared "SHUnlockShared" sptr
; SHUnlockShared pvData   ; 戻り値は stat
; pvData : void* -> "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 "SHLWAPI.dll"
#cfunc global SHUnlockShared "SHUnlockShared" sptr
; res = SHUnlockShared(pvData)
; pvData : void* -> "sptr"

; BOOL SHUnlockShared(void* pvData)
#uselib "SHLWAPI.dll"
#cfunc global SHUnlockShared "SHUnlockShared" intptr
; res = SHUnlockShared(pvData)
; pvData : void* -> "intptr"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHUnlockShared = shlwapi.NewProc("SHUnlockShared")
)

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

function SHUnlockShared(
  pvData: Pointer   // void*
): BOOL; stdcall;
  external 'SHLWAPI.dll' name 'SHUnlockShared';

result := DllCall("SHLWAPI\SHUnlockShared"
    , "Ptr", pvData   ; void*
    , "Int")   ; return: BOOL

●SHUnlockShared(pvData) = DLL("SHLWAPI.dll", "bool SHUnlockShared(void*)")
# 呼び出し: SHUnlockShared(pvData)
# pvData : void* -> "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)。