FlsAlloc

関数

ファイバーローカルストレージのインデックスを割り当てる。

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

シグネチャ

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

DWORD FlsAlloc(
    PFLS_CALLBACK_FUNCTION lpCallback   // optional
);

パラメーター

名前	型	方向
lpCallback	PFLS_CALLBACK_FUNCTION	inoptional

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD FlsAlloc(
    PFLS_CALLBACK_FUNCTION lpCallback   // optional
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern uint FlsAlloc(
    IntPtr lpCallback   // PFLS_CALLBACK_FUNCTION optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FlsAlloc(
    lpCallback As IntPtr   ' PFLS_CALLBACK_FUNCTION optional
) As UInteger
End Function

' lpCallback : PFLS_CALLBACK_FUNCTION optional
Declare PtrSafe Function FlsAlloc Lib "kernel32" ( _
    ByVal lpCallback 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

FlsAlloc = ctypes.windll.kernel32.FlsAlloc
FlsAlloc.restype = wintypes.DWORD
FlsAlloc.argtypes = [
    ctypes.c_void_p,  # lpCallback : PFLS_CALLBACK_FUNCTION optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FlsAlloc = Fiddle::Function.new(
  lib['FlsAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # lpCallback : PFLS_CALLBACK_FUNCTION optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn FlsAlloc(
        lpCallback: *const core::ffi::c_void  // PFLS_CALLBACK_FUNCTION optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern uint FlsAlloc(IntPtr lpCallback);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FlsAlloc' -Namespace Win32 -PassThru
# $api::FlsAlloc(lpCallback)

#uselib "KERNEL32.dll"
#func global FlsAlloc "FlsAlloc" sptr
; FlsAlloc lpCallback   ; 戻り値は stat
; lpCallback : PFLS_CALLBACK_FUNCTION optional -> "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 FlsAlloc "FlsAlloc" sptr
; res = FlsAlloc(lpCallback)
; lpCallback : PFLS_CALLBACK_FUNCTION optional -> "sptr"

; DWORD FlsAlloc(PFLS_CALLBACK_FUNCTION lpCallback)
#uselib "KERNEL32.dll"
#cfunc global FlsAlloc "FlsAlloc" intptr
; res = FlsAlloc(lpCallback)
; lpCallback : PFLS_CALLBACK_FUNCTION optional -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procFlsAlloc = kernel32.NewProc("FlsAlloc")
)

// lpCallback (PFLS_CALLBACK_FUNCTION optional)
r1, _, err := procFlsAlloc.Call(
	uintptr(lpCallback),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function FlsAlloc(
  lpCallback: Pointer   // PFLS_CALLBACK_FUNCTION optional
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'FlsAlloc';

result := DllCall("KERNEL32\FlsAlloc"
    , "Ptr", lpCallback   ; PFLS_CALLBACK_FUNCTION optional
    , "UInt")   ; return: DWORD

●FlsAlloc(lpCallback) = DLL("KERNEL32.dll", "dword FlsAlloc(void*)")
# 呼び出し: FlsAlloc(lpCallback)
# lpCallback : PFLS_CALLBACK_FUNCTION optional -> "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)。