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CreateSemaphoreExA

関数

アクセス権とフラグを指定してセマフォを作成する(ANSI版)。

DLLKERNEL32.dll文字セットANSI (-A)呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

HANDLE CreateSemaphoreExA(
    SECURITY_ATTRIBUTES* lpSemaphoreAttributes,   // optional
    INT lInitialCount,
    INT lMaximumCount,
    LPCSTR lpName,   // optional
    DWORD dwFlags,   // optional
    DWORD dwDesiredAccess
);

パラメーター

名前	型	方向
lpSemaphoreAttributes	SECURITY_ATTRIBUTES*	inoptional
lInitialCount	INT	in
lMaximumCount	INT	in
lpName	LPCSTR	inoptional
dwFlags	DWORD	optional
dwDesiredAccess	DWORD	in

戻り値の型: HANDLE

各言語での呼び出し定義

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

HANDLE CreateSemaphoreExA(
    SECURITY_ATTRIBUTES* lpSemaphoreAttributes,   // optional
    INT lInitialCount,
    INT lMaximumCount,
    LPCSTR lpName,   // optional
    DWORD dwFlags,   // optional
    DWORD dwDesiredAccess
);

[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
static extern IntPtr CreateSemaphoreExA(
    IntPtr lpSemaphoreAttributes,   // SECURITY_ATTRIBUTES* optional
    int lInitialCount,   // INT
    int lMaximumCount,   // INT
    [MarshalAs(UnmanagedType.LPStr)] string lpName,   // LPCSTR optional
    uint dwFlags,   // DWORD optional
    uint dwDesiredAccess   // DWORD
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CreateSemaphoreExA(
    lpSemaphoreAttributes As IntPtr,   ' SECURITY_ATTRIBUTES* optional
    lInitialCount As Integer,   ' INT
    lMaximumCount As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPStr)> lpName As String,   ' LPCSTR optional
    dwFlags As UInteger,   ' DWORD optional
    dwDesiredAccess As UInteger   ' DWORD
) As IntPtr
End Function

' lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional
' lInitialCount : INT
' lMaximumCount : INT
' lpName : LPCSTR optional
' dwFlags : DWORD optional
' dwDesiredAccess : DWORD
Declare PtrSafe Function CreateSemaphoreExA Lib "kernel32" ( _
    ByVal lpSemaphoreAttributes As LongPtr, _
    ByVal lInitialCount As Long, _
    ByVal lMaximumCount As Long, _
    ByVal lpName As String, _
    ByVal dwFlags As Long, _
    ByVal dwDesiredAccess 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

CreateSemaphoreExA = ctypes.windll.kernel32.CreateSemaphoreExA
CreateSemaphoreExA.restype = ctypes.c_void_p
CreateSemaphoreExA.argtypes = [
    ctypes.c_void_p,  # lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional
    ctypes.c_int,  # lInitialCount : INT
    ctypes.c_int,  # lMaximumCount : INT
    wintypes.LPCSTR,  # lpName : LPCSTR optional
    wintypes.DWORD,  # dwFlags : DWORD optional
    wintypes.DWORD,  # dwDesiredAccess : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
CreateSemaphoreExA = Fiddle::Function.new(
  lib['CreateSemaphoreExA'],
  [
    Fiddle::TYPE_VOIDP,  # lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional
    Fiddle::TYPE_INT,  # lInitialCount : INT
    Fiddle::TYPE_INT,  # lMaximumCount : INT
    Fiddle::TYPE_VOIDP,  # lpName : LPCSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD optional
    -Fiddle::TYPE_INT,  # dwDesiredAccess : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "kernel32")]
extern "system" {
    fn CreateSemaphoreExA(
        lpSemaphoreAttributes: *mut SECURITY_ATTRIBUTES,  // SECURITY_ATTRIBUTES* optional
        lInitialCount: i32,  // INT
        lMaximumCount: i32,  // INT
        lpName: *const u8,  // LPCSTR optional
        dwFlags: u32,  // DWORD optional
        dwDesiredAccess: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern IntPtr CreateSemaphoreExA(IntPtr lpSemaphoreAttributes, int lInitialCount, int lMaximumCount, [MarshalAs(UnmanagedType.LPStr)] string lpName, uint dwFlags, uint dwDesiredAccess);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_CreateSemaphoreExA' -Namespace Win32 -PassThru
# $api::CreateSemaphoreExA(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)

#uselib "KERNEL32.dll"
#func global CreateSemaphoreExA "CreateSemaphoreExA" sptr, sptr, sptr, sptr, sptr, sptr
; CreateSemaphoreExA varptr(lpSemaphoreAttributes), lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess   ; 戻り値は stat
; lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "sptr"
; lInitialCount : INT -> "sptr"
; lMaximumCount : INT -> "sptr"
; lpName : LPCSTR optional -> "sptr"
; dwFlags : DWORD optional -> "sptr"
; dwDesiredAccess : 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。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global CreateSemaphoreExA "CreateSemaphoreExA" var, int, int, str, int, int
; res = CreateSemaphoreExA(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)
; lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "var"
; lInitialCount : INT -> "int"
; lMaximumCount : INT -> "int"
; lpName : LPCSTR optional -> "str"
; dwFlags : DWORD optional -> "int"
; dwDesiredAccess : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "KERNEL32.dll"
#cfunc global CreateSemaphoreExA "CreateSemaphoreExA" sptr, int, int, str, int, int
; res = CreateSemaphoreExA(varptr(lpSemaphoreAttributes), lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)
; lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "sptr"
; lInitialCount : INT -> "int"
; lMaximumCount : INT -> "int"
; lpName : LPCSTR optional -> "str"
; dwFlags : DWORD optional -> "int"
; dwDesiredAccess : DWORD -> "int"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HANDLE CreateSemaphoreExA(SECURITY_ATTRIBUTES* lpSemaphoreAttributes, INT lInitialCount, INT lMaximumCount, LPCSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess)
#uselib "KERNEL32.dll"
#cfunc global CreateSemaphoreExA "CreateSemaphoreExA" var, int, int, str, int, int
; res = CreateSemaphoreExA(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)
; lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "var"
; lInitialCount : INT -> "int"
; lMaximumCount : INT -> "int"
; lpName : LPCSTR optional -> "str"
; dwFlags : DWORD optional -> "int"
; dwDesiredAccess : DWORD -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; HANDLE CreateSemaphoreExA(SECURITY_ATTRIBUTES* lpSemaphoreAttributes, INT lInitialCount, INT lMaximumCount, LPCSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess)
#uselib "KERNEL32.dll"
#cfunc global CreateSemaphoreExA "CreateSemaphoreExA" intptr, int, int, str, int, int
; res = CreateSemaphoreExA(varptr(lpSemaphoreAttributes), lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)
; lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "intptr"
; lInitialCount : INT -> "int"
; lMaximumCount : INT -> "int"
; lpName : LPCSTR optional -> "str"
; dwFlags : DWORD optional -> "int"
; dwDesiredAccess : DWORD -> "int"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procCreateSemaphoreExA = kernel32.NewProc("CreateSemaphoreExA")
)

// lpSemaphoreAttributes (SECURITY_ATTRIBUTES* optional), lInitialCount (INT), lMaximumCount (INT), lpName (LPCSTR optional), dwFlags (DWORD optional), dwDesiredAccess (DWORD)
r1, _, err := procCreateSemaphoreExA.Call(
	uintptr(lpSemaphoreAttributes),
	uintptr(lInitialCount),
	uintptr(lMaximumCount),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpName))),
	uintptr(dwFlags),
	uintptr(dwDesiredAccess),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function CreateSemaphoreExA(
  lpSemaphoreAttributes: Pointer;   // SECURITY_ATTRIBUTES* optional
  lInitialCount: Integer;   // INT
  lMaximumCount: Integer;   // INT
  lpName: PAnsiChar;   // LPCSTR optional
  dwFlags: DWORD;   // DWORD optional
  dwDesiredAccess: DWORD   // DWORD
): THandle; stdcall;
  external 'KERNEL32.dll' name 'CreateSemaphoreExA';

result := DllCall("KERNEL32\CreateSemaphoreExA"
    , "Ptr", lpSemaphoreAttributes   ; SECURITY_ATTRIBUTES* optional
    , "Int", lInitialCount   ; INT
    , "Int", lMaximumCount   ; INT
    , "AStr", lpName   ; LPCSTR optional
    , "UInt", dwFlags   ; DWORD optional
    , "UInt", dwDesiredAccess   ; DWORD
    , "Ptr")   ; return: HANDLE

●CreateSemaphoreExA(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess) = DLL("KERNEL32.dll", "void* CreateSemaphoreExA(void*, int, int, char*, dword, dword)")
# 呼び出し: CreateSemaphoreExA(lpSemaphoreAttributes, lInitialCount, lMaximumCount, lpName, dwFlags, dwDesiredAccess)
# lpSemaphoreAttributes : SECURITY_ATTRIBUTES* optional -> "void*"
# lInitialCount : INT -> "int"
# lMaximumCount : INT -> "int"
# lpName : LPCSTR optional -> "char*"
# dwFlags : DWORD optional -> "dword"
# dwDesiredAccess : 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)。