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WlanAllocateMemory

関数

WLAN API用に指定サイズのメモリを確保する。

DLLwlanapi.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

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

void* WlanAllocateMemory(
    DWORD dwMemorySize
);

パラメーター

名前	型	方向
dwMemorySize	DWORD	in

戻り値の型: void*

各言語での呼び出し定義

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

void* WlanAllocateMemory(
    DWORD dwMemorySize
);

[DllImport("wlanapi.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr WlanAllocateMemory(
    uint dwMemorySize   // DWORD
);

<DllImport("wlanapi.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WlanAllocateMemory(
    dwMemorySize As UInteger   ' DWORD
) As IntPtr
End Function

' dwMemorySize : DWORD
Declare PtrSafe Function WlanAllocateMemory Lib "wlanapi" ( _
    ByVal dwMemorySize As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WlanAllocateMemory = ctypes.windll.wlanapi.WlanAllocateMemory
WlanAllocateMemory.restype = ctypes.c_void_p
WlanAllocateMemory.argtypes = [
    wintypes.DWORD,  # dwMemorySize : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('wlanapi.dll')
WlanAllocateMemory = Fiddle::Function.new(
  lib['WlanAllocateMemory'],
  [
    -Fiddle::TYPE_INT,  # dwMemorySize : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "wlanapi")]
extern "system" {
    fn WlanAllocateMemory(
        dwMemorySize: u32  // DWORD
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("wlanapi.dll", SetLastError = true)]
public static extern IntPtr WlanAllocateMemory(uint dwMemorySize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'wlanapi_WlanAllocateMemory' -Namespace Win32 -PassThru
# $api::WlanAllocateMemory(dwMemorySize)

#uselib "wlanapi.dll"
#func global WlanAllocateMemory "WlanAllocateMemory" sptr
; WlanAllocateMemory dwMemorySize   ; 戻り値は stat
; dwMemorySize : DWORD -> "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 "wlanapi.dll"
#cfunc global WlanAllocateMemory "WlanAllocateMemory" int
; res = WlanAllocateMemory(dwMemorySize)
; dwMemorySize : DWORD -> "int"

; void* WlanAllocateMemory(DWORD dwMemorySize)
#uselib "wlanapi.dll"
#cfunc global WlanAllocateMemory "WlanAllocateMemory" int
; res = WlanAllocateMemory(dwMemorySize)
; dwMemorySize : DWORD -> "int"

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

var (
	wlanapi = windows.NewLazySystemDLL("wlanapi.dll")
	procWlanAllocateMemory = wlanapi.NewProc("WlanAllocateMemory")
)

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

function WlanAllocateMemory(
  dwMemorySize: DWORD   // DWORD
): Pointer; stdcall;
  external 'wlanapi.dll' name 'WlanAllocateMemory';

result := DllCall("wlanapi\WlanAllocateMemory"
    , "UInt", dwMemorySize   ; DWORD
    , "Ptr")   ; return: void*

●WlanAllocateMemory(dwMemorySize) = DLL("wlanapi.dll", "void* WlanAllocateMemory(dword)")
# 呼び出し: WlanAllocateMemory(dwMemorySize)
# dwMemorySize : DWORD -> "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)。