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SetHandleCount

関数

プロセスで使用可能なファイルハンドル数を設定する旧式関数。

DLLKERNEL32.dll呼出規約winapi

シグネチャ

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

DWORD SetHandleCount(
    DWORD uNumber
);

パラメーター

名前	型	方向
uNumber	DWORD	in

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD SetHandleCount(
    DWORD uNumber
);

[DllImport("KERNEL32.dll", ExactSpelling = true)]
static extern uint SetHandleCount(
    uint uNumber   // DWORD
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function SetHandleCount(
    uNumber As UInteger   ' DWORD
) As UInteger
End Function

' uNumber : DWORD
Declare PtrSafe Function SetHandleCount Lib "kernel32" ( _
    ByVal uNumber 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

SetHandleCount = ctypes.windll.kernel32.SetHandleCount
SetHandleCount.restype = wintypes.DWORD
SetHandleCount.argtypes = [
    wintypes.DWORD,  # uNumber : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetHandleCount = Fiddle::Function.new(
  lib['SetHandleCount'],
  [
    -Fiddle::TYPE_INT,  # uNumber : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetHandleCount(
        uNumber: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern uint SetHandleCount(uint uNumber);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetHandleCount' -Namespace Win32 -PassThru
# $api::SetHandleCount(uNumber)

#uselib "KERNEL32.dll"
#func global SetHandleCount "SetHandleCount" sptr
; SetHandleCount uNumber   ; 戻り値は stat
; uNumber : 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。

#uselib "KERNEL32.dll"
#cfunc global SetHandleCount "SetHandleCount" int
; res = SetHandleCount(uNumber)
; uNumber : DWORD -> "int"

; DWORD SetHandleCount(DWORD uNumber)
#uselib "KERNEL32.dll"
#cfunc global SetHandleCount "SetHandleCount" int
; res = SetHandleCount(uNumber)
; uNumber : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetHandleCount = kernel32.NewProc("SetHandleCount")
)

// uNumber (DWORD)
r1, _, err := procSetHandleCount.Call(
	uintptr(uNumber),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SetHandleCount(
  uNumber: DWORD   // DWORD
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'SetHandleCount';

result := DllCall("KERNEL32\SetHandleCount"
    , "UInt", uNumber   ; DWORD
    , "UInt")   ; return: DWORD

●SetHandleCount(uNumber) = DLL("KERNEL32.dll", "dword SetHandleCount(dword)")
# 呼び出し: SetHandleCount(uNumber)
# uNumber : 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)。