ホーム › System.Threading › TryAcquireSRWLockShared

TryAcquireSRWLockShared

関数

SRWロックの共有取得をブロックせず試行する。

DLLKERNEL32.dll呼出規約winapi対応OSWindows 7 以降

シグネチャ

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

BOOLEAN TryAcquireSRWLockShared(
    SRWLOCK* SRWLock
);

パラメーター

名前	型	方向
SRWLock	SRWLOCK*	inout

戻り値の型: BOOLEAN

各言語での呼び出し定義

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

BOOLEAN TryAcquireSRWLockShared(
    SRWLOCK* SRWLock
);

[DllImport("KERNEL32.dll", ExactSpelling = true)]
static extern byte TryAcquireSRWLockShared(
    IntPtr SRWLock   // SRWLOCK* in/out
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function TryAcquireSRWLockShared(
    SRWLock As IntPtr   ' SRWLOCK* in/out
) As Byte
End Function

' SRWLock : SRWLOCK* in/out
Declare PtrSafe Function TryAcquireSRWLockShared Lib "kernel32" ( _
    ByVal SRWLock As LongPtr) As Byte
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

TryAcquireSRWLockShared = ctypes.windll.kernel32.TryAcquireSRWLockShared
TryAcquireSRWLockShared.restype = ctypes.c_byte
TryAcquireSRWLockShared.argtypes = [
    ctypes.c_void_p,  # SRWLock : SRWLOCK* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
TryAcquireSRWLockShared = Fiddle::Function.new(
  lib['TryAcquireSRWLockShared'],
  [
    Fiddle::TYPE_VOIDP,  # SRWLock : SRWLOCK* in/out
  ],
  Fiddle::TYPE_CHAR)

#[link(name = "kernel32")]
extern "system" {
    fn TryAcquireSRWLockShared(
        SRWLock: *mut SRWLOCK  // SRWLOCK* in/out
    ) -> u8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern byte TryAcquireSRWLockShared(IntPtr SRWLock);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_TryAcquireSRWLockShared' -Namespace Win32 -PassThru
# $api::TryAcquireSRWLockShared(SRWLock)

#uselib "KERNEL32.dll"
#func global TryAcquireSRWLockShared "TryAcquireSRWLockShared" sptr
; TryAcquireSRWLockShared varptr(SRWLock)   ; 戻り値は stat
; SRWLock : SRWLOCK* in/out -> "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 TryAcquireSRWLockShared "TryAcquireSRWLockShared" var
; res = TryAcquireSRWLockShared(SRWLock)
; SRWLock : SRWLOCK* 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"
#cfunc global TryAcquireSRWLockShared "TryAcquireSRWLockShared" sptr
; res = TryAcquireSRWLockShared(varptr(SRWLock))
; SRWLock : SRWLOCK* 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:

; BOOLEAN TryAcquireSRWLockShared(SRWLOCK* SRWLock)
#uselib "KERNEL32.dll"
#cfunc global TryAcquireSRWLockShared "TryAcquireSRWLockShared" var
; res = TryAcquireSRWLockShared(SRWLock)
; SRWLock : SRWLOCK* 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。; BOOLEAN TryAcquireSRWLockShared(SRWLOCK* SRWLock)
#uselib "KERNEL32.dll"
#cfunc global TryAcquireSRWLockShared "TryAcquireSRWLockShared" intptr
; res = TryAcquireSRWLockShared(varptr(SRWLock))
; SRWLock : SRWLOCK* 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")
	procTryAcquireSRWLockShared = kernel32.NewProc("TryAcquireSRWLockShared")
)

// SRWLock (SRWLOCK* in/out)
r1, _, err := procTryAcquireSRWLockShared.Call(
	uintptr(SRWLock),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOLEAN

function TryAcquireSRWLockShared(
  SRWLock: Pointer   // SRWLOCK* in/out
): ByteBool; stdcall;
  external 'KERNEL32.dll' name 'TryAcquireSRWLockShared';

result := DllCall("KERNEL32\TryAcquireSRWLockShared"
    , "Ptr", SRWLock   ; SRWLOCK* in/out
    , "Char")   ; return: BOOLEAN

●TryAcquireSRWLockShared(SRWLock) = DLL("KERNEL32.dll", "byte TryAcquireSRWLockShared(void*)")
# 呼び出し: TryAcquireSRWLockShared(SRWLock)
# SRWLock : SRWLOCK* 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)。