ReleaseMutex

関数

ミューテックスの所有権を解放する。

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 ReleaseMutex(
    HANDLE hMutex
);

パラメーター

名前	型	方向
hMutex	HANDLE	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL ReleaseMutex(
    HANDLE hMutex
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool ReleaseMutex(
    IntPtr hMutex   // HANDLE
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReleaseMutex(
    hMutex As IntPtr   ' HANDLE
) As Boolean
End Function

' hMutex : HANDLE
Declare PtrSafe Function ReleaseMutex Lib "kernel32" ( _
    ByVal hMutex 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

ReleaseMutex = ctypes.windll.kernel32.ReleaseMutex
ReleaseMutex.restype = wintypes.BOOL
ReleaseMutex.argtypes = [
    wintypes.HANDLE,  # hMutex : HANDLE
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
ReleaseMutex = Fiddle::Function.new(
  lib['ReleaseMutex'],
  [
    Fiddle::TYPE_VOIDP,  # hMutex : HANDLE
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn ReleaseMutex(
        hMutex: *mut core::ffi::c_void  // HANDLE
    ) -> 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 ReleaseMutex(IntPtr hMutex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_ReleaseMutex' -Namespace Win32 -PassThru
# $api::ReleaseMutex(hMutex)

#uselib "KERNEL32.dll"
#func global ReleaseMutex "ReleaseMutex" sptr
; ReleaseMutex hMutex   ; 戻り値は stat
; hMutex : HANDLE -> "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 ReleaseMutex "ReleaseMutex" sptr
; res = ReleaseMutex(hMutex)
; hMutex : HANDLE -> "sptr"

; BOOL ReleaseMutex(HANDLE hMutex)
#uselib "KERNEL32.dll"
#cfunc global ReleaseMutex "ReleaseMutex" intptr
; res = ReleaseMutex(hMutex)
; hMutex : HANDLE -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procReleaseMutex = kernel32.NewProc("ReleaseMutex")
)

// hMutex (HANDLE)
r1, _, err := procReleaseMutex.Call(
	uintptr(hMutex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReleaseMutex(
  hMutex: THandle   // HANDLE
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'ReleaseMutex';

result := DllCall("KERNEL32\ReleaseMutex"
    , "Ptr", hMutex   ; HANDLE
    , "Int")   ; return: BOOL

●ReleaseMutex(hMutex) = DLL("KERNEL32.dll", "bool ReleaseMutex(void*)")
# 呼び出し: ReleaseMutex(hMutex)
# hMutex : HANDLE -> "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)。