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EnterCriticalSection

関数

クリティカルセクションの所有権を取得し待機する。

DLLKERNEL32.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

void EnterCriticalSection(
    CRITICAL_SECTION* lpCriticalSection
);

パラメーター

名前	型	方向
lpCriticalSection	CRITICAL_SECTION*	inout

戻り値の型: void

各言語での呼び出し定義

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

void EnterCriticalSection(
    CRITICAL_SECTION* lpCriticalSection
);

[DllImport("KERNEL32.dll", ExactSpelling = true)]
static extern void EnterCriticalSection(
    IntPtr lpCriticalSection   // CRITICAL_SECTION* in/out
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Sub EnterCriticalSection(
    lpCriticalSection As IntPtr   ' CRITICAL_SECTION* in/out
)
End Sub

' lpCriticalSection : CRITICAL_SECTION* in/out
Declare PtrSafe Sub EnterCriticalSection Lib "kernel32" ( _
    ByVal lpCriticalSection As LongPtr)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EnterCriticalSection = ctypes.windll.kernel32.EnterCriticalSection
EnterCriticalSection.restype = None
EnterCriticalSection.argtypes = [
    ctypes.c_void_p,  # lpCriticalSection : CRITICAL_SECTION* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
EnterCriticalSection = Fiddle::Function.new(
  lib['EnterCriticalSection'],
  [
    Fiddle::TYPE_VOIDP,  # lpCriticalSection : CRITICAL_SECTION* in/out
  ],
  Fiddle::TYPE_VOID)

#[link(name = "kernel32")]
extern "system" {
    fn EnterCriticalSection(
        lpCriticalSection: *mut CRITICAL_SECTION  // CRITICAL_SECTION* in/out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern void EnterCriticalSection(IntPtr lpCriticalSection);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_EnterCriticalSection' -Namespace Win32 -PassThru
# $api::EnterCriticalSection(lpCriticalSection)

#uselib "KERNEL32.dll"
#func global EnterCriticalSection "EnterCriticalSection" sptr
; EnterCriticalSection varptr(lpCriticalSection)
; lpCriticalSection : CRITICAL_SECTION* in/out -> "sptr"

出力引数:

#uselib "KERNEL32.dll"
#func global EnterCriticalSection "EnterCriticalSection" var
; EnterCriticalSection lpCriticalSection
; lpCriticalSection : CRITICAL_SECTION* in/out -> "var"
; ※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"
#func global EnterCriticalSection "EnterCriticalSection" sptr
; EnterCriticalSection varptr(lpCriticalSection)
; lpCriticalSection : CRITICAL_SECTION* in/out -> "sptr"
; ※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:

; void EnterCriticalSection(CRITICAL_SECTION* lpCriticalSection)
#uselib "KERNEL32.dll"
#func global EnterCriticalSection "EnterCriticalSection" var
; EnterCriticalSection lpCriticalSection
; lpCriticalSection : CRITICAL_SECTION* in/out -> "var"
; ※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。; void EnterCriticalSection(CRITICAL_SECTION* lpCriticalSection)
#uselib "KERNEL32.dll"
#func global EnterCriticalSection "EnterCriticalSection" intptr
; EnterCriticalSection varptr(lpCriticalSection)
; lpCriticalSection : CRITICAL_SECTION* in/out -> "intptr"
; ※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")
	procEnterCriticalSection = kernel32.NewProc("EnterCriticalSection")
)

// lpCriticalSection (CRITICAL_SECTION* in/out)
r1, _, err := procEnterCriticalSection.Call(
	uintptr(lpCriticalSection),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure EnterCriticalSection(
  lpCriticalSection: Pointer   // CRITICAL_SECTION* in/out
); stdcall;
  external 'KERNEL32.dll' name 'EnterCriticalSection';

result := DllCall("KERNEL32\EnterCriticalSection"
    , "Ptr", lpCriticalSection   ; CRITICAL_SECTION* in/out
    , "Int")   ; return: void

●EnterCriticalSection(lpCriticalSection) = DLL("KERNEL32.dll", "int EnterCriticalSection(void*)")
# 呼び出し: EnterCriticalSection(lpCriticalSection)
# lpCriticalSection : CRITICAL_SECTION* in/out -> "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)。