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InitializeCriticalSectionAndSpinCount

関数

スピンカウント付きでクリティカルセクションを初期化する。

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

シグネチャ

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

BOOL InitializeCriticalSectionAndSpinCount(
    CRITICAL_SECTION* lpCriticalSection,
    DWORD dwSpinCount
);

パラメーター

名前	型	方向
lpCriticalSection	CRITICAL_SECTION*	out
dwSpinCount	DWORD	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL InitializeCriticalSectionAndSpinCount(
    CRITICAL_SECTION* lpCriticalSection,
    DWORD dwSpinCount
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool InitializeCriticalSectionAndSpinCount(
    IntPtr lpCriticalSection,   // CRITICAL_SECTION* out
    uint dwSpinCount   // DWORD
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InitializeCriticalSectionAndSpinCount(
    lpCriticalSection As IntPtr,   ' CRITICAL_SECTION* out
    dwSpinCount As UInteger   ' DWORD
) As Boolean
End Function

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

import ctypes
from ctypes import wintypes

InitializeCriticalSectionAndSpinCount = ctypes.windll.kernel32.InitializeCriticalSectionAndSpinCount
InitializeCriticalSectionAndSpinCount.restype = wintypes.BOOL
InitializeCriticalSectionAndSpinCount.argtypes = [
    ctypes.c_void_p,  # lpCriticalSection : CRITICAL_SECTION* out
    wintypes.DWORD,  # dwSpinCount : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
InitializeCriticalSectionAndSpinCount = Fiddle::Function.new(
  lib['InitializeCriticalSectionAndSpinCount'],
  [
    Fiddle::TYPE_VOIDP,  # lpCriticalSection : CRITICAL_SECTION* out
    -Fiddle::TYPE_INT,  # dwSpinCount : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn InitializeCriticalSectionAndSpinCount(
        lpCriticalSection: *mut CRITICAL_SECTION,  // CRITICAL_SECTION* out
        dwSpinCount: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool InitializeCriticalSectionAndSpinCount(IntPtr lpCriticalSection, uint dwSpinCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_InitializeCriticalSectionAndSpinCount' -Namespace Win32 -PassThru
# $api::InitializeCriticalSectionAndSpinCount(lpCriticalSection, dwSpinCount)

#uselib "KERNEL32.dll"
#func global InitializeCriticalSectionAndSpinCount "InitializeCriticalSectionAndSpinCount" sptr, sptr
; InitializeCriticalSectionAndSpinCount varptr(lpCriticalSection), dwSpinCount   ; 戻り値は stat
; lpCriticalSection : CRITICAL_SECTION* out -> "sptr"
; dwSpinCount : 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 InitializeCriticalSectionAndSpinCount "InitializeCriticalSectionAndSpinCount" var, int
; res = InitializeCriticalSectionAndSpinCount(lpCriticalSection, dwSpinCount)
; lpCriticalSection : CRITICAL_SECTION* out -> "var"
; dwSpinCount : 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 InitializeCriticalSectionAndSpinCount "InitializeCriticalSectionAndSpinCount" sptr, int
; res = InitializeCriticalSectionAndSpinCount(varptr(lpCriticalSection), dwSpinCount)
; lpCriticalSection : CRITICAL_SECTION* out -> "sptr"
; dwSpinCount : 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:

; BOOL InitializeCriticalSectionAndSpinCount(CRITICAL_SECTION* lpCriticalSection, DWORD dwSpinCount)
#uselib "KERNEL32.dll"
#cfunc global InitializeCriticalSectionAndSpinCount "InitializeCriticalSectionAndSpinCount" var, int
; res = InitializeCriticalSectionAndSpinCount(lpCriticalSection, dwSpinCount)
; lpCriticalSection : CRITICAL_SECTION* out -> "var"
; dwSpinCount : 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。; BOOL InitializeCriticalSectionAndSpinCount(CRITICAL_SECTION* lpCriticalSection, DWORD dwSpinCount)
#uselib "KERNEL32.dll"
#cfunc global InitializeCriticalSectionAndSpinCount "InitializeCriticalSectionAndSpinCount" intptr, int
; res = InitializeCriticalSectionAndSpinCount(varptr(lpCriticalSection), dwSpinCount)
; lpCriticalSection : CRITICAL_SECTION* out -> "intptr"
; dwSpinCount : 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")
	procInitializeCriticalSectionAndSpinCount = kernel32.NewProc("InitializeCriticalSectionAndSpinCount")
)

// lpCriticalSection (CRITICAL_SECTION* out), dwSpinCount (DWORD)
r1, _, err := procInitializeCriticalSectionAndSpinCount.Call(
	uintptr(lpCriticalSection),
	uintptr(dwSpinCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InitializeCriticalSectionAndSpinCount(
  lpCriticalSection: Pointer;   // CRITICAL_SECTION* out
  dwSpinCount: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'InitializeCriticalSectionAndSpinCount';

result := DllCall("KERNEL32\InitializeCriticalSectionAndSpinCount"
    , "Ptr", lpCriticalSection   ; CRITICAL_SECTION* out
    , "UInt", dwSpinCount   ; DWORD
    , "Int")   ; return: BOOL

●InitializeCriticalSectionAndSpinCount(lpCriticalSection, dwSpinCount) = DLL("KERNEL32.dll", "bool InitializeCriticalSectionAndSpinCount(void*, dword)")
# 呼び出し: InitializeCriticalSectionAndSpinCount(lpCriticalSection, dwSpinCount)
# lpCriticalSection : CRITICAL_SECTION* out -> "void*"
# dwSpinCount : 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)。