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SetSystemFileCacheSize

関数

システムファイルキャッシュの最小・最大サイズを設定する。

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

シグネチャ

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

BOOL SetSystemFileCacheSize(
    UINT_PTR MinimumFileCacheSize,
    UINT_PTR MaximumFileCacheSize,
    DWORD Flags
);

パラメーター

名前	型	方向
MinimumFileCacheSize	UINT_PTR	in
MaximumFileCacheSize	UINT_PTR	in
Flags	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 SetSystemFileCacheSize(
    UINT_PTR MinimumFileCacheSize,
    UINT_PTR MaximumFileCacheSize,
    DWORD Flags
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool SetSystemFileCacheSize(
    UIntPtr MinimumFileCacheSize,   // UINT_PTR
    UIntPtr MaximumFileCacheSize,   // UINT_PTR
    uint Flags   // DWORD
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetSystemFileCacheSize(
    MinimumFileCacheSize As UIntPtr,   ' UINT_PTR
    MaximumFileCacheSize As UIntPtr,   ' UINT_PTR
    Flags As UInteger   ' DWORD
) As Boolean
End Function

' MinimumFileCacheSize : UINT_PTR
' MaximumFileCacheSize : UINT_PTR
' Flags : DWORD
Declare PtrSafe Function SetSystemFileCacheSize Lib "kernel32" ( _
    ByVal MinimumFileCacheSize As LongPtr, _
    ByVal MaximumFileCacheSize As LongPtr, _
    ByVal Flags 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

SetSystemFileCacheSize = ctypes.windll.kernel32.SetSystemFileCacheSize
SetSystemFileCacheSize.restype = wintypes.BOOL
SetSystemFileCacheSize.argtypes = [
    ctypes.c_size_t,  # MinimumFileCacheSize : UINT_PTR
    ctypes.c_size_t,  # MaximumFileCacheSize : UINT_PTR
    wintypes.DWORD,  # Flags : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
SetSystemFileCacheSize = Fiddle::Function.new(
  lib['SetSystemFileCacheSize'],
  [
    Fiddle::TYPE_UINTPTR_T,  # MinimumFileCacheSize : UINT_PTR
    Fiddle::TYPE_UINTPTR_T,  # MaximumFileCacheSize : UINT_PTR
    -Fiddle::TYPE_INT,  # Flags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn SetSystemFileCacheSize(
        MinimumFileCacheSize: usize,  // UINT_PTR
        MaximumFileCacheSize: usize,  // UINT_PTR
        Flags: 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 SetSystemFileCacheSize(UIntPtr MinimumFileCacheSize, UIntPtr MaximumFileCacheSize, uint Flags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_SetSystemFileCacheSize' -Namespace Win32 -PassThru
# $api::SetSystemFileCacheSize(MinimumFileCacheSize, MaximumFileCacheSize, Flags)

#uselib "KERNEL32.dll"
#func global SetSystemFileCacheSize "SetSystemFileCacheSize" sptr, sptr, sptr
; SetSystemFileCacheSize MinimumFileCacheSize, MaximumFileCacheSize, Flags   ; 戻り値は stat
; MinimumFileCacheSize : UINT_PTR -> "sptr"
; MaximumFileCacheSize : UINT_PTR -> "sptr"
; Flags : 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 SetSystemFileCacheSize "SetSystemFileCacheSize" sptr, sptr, int
; res = SetSystemFileCacheSize(MinimumFileCacheSize, MaximumFileCacheSize, Flags)
; MinimumFileCacheSize : UINT_PTR -> "sptr"
; MaximumFileCacheSize : UINT_PTR -> "sptr"
; Flags : DWORD -> "int"

; BOOL SetSystemFileCacheSize(UINT_PTR MinimumFileCacheSize, UINT_PTR MaximumFileCacheSize, DWORD Flags)
#uselib "KERNEL32.dll"
#cfunc global SetSystemFileCacheSize "SetSystemFileCacheSize" intptr, intptr, int
; res = SetSystemFileCacheSize(MinimumFileCacheSize, MaximumFileCacheSize, Flags)
; MinimumFileCacheSize : UINT_PTR -> "intptr"
; MaximumFileCacheSize : UINT_PTR -> "intptr"
; Flags : DWORD -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procSetSystemFileCacheSize = kernel32.NewProc("SetSystemFileCacheSize")
)

// MinimumFileCacheSize (UINT_PTR), MaximumFileCacheSize (UINT_PTR), Flags (DWORD)
r1, _, err := procSetSystemFileCacheSize.Call(
	uintptr(MinimumFileCacheSize),
	uintptr(MaximumFileCacheSize),
	uintptr(Flags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetSystemFileCacheSize(
  MinimumFileCacheSize: NativeUInt;   // UINT_PTR
  MaximumFileCacheSize: NativeUInt;   // UINT_PTR
  Flags: DWORD   // DWORD
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'SetSystemFileCacheSize';

result := DllCall("KERNEL32\SetSystemFileCacheSize"
    , "UPtr", MinimumFileCacheSize   ; UINT_PTR
    , "UPtr", MaximumFileCacheSize   ; UINT_PTR
    , "UInt", Flags   ; DWORD
    , "Int")   ; return: BOOL

●SetSystemFileCacheSize(MinimumFileCacheSize, MaximumFileCacheSize, Flags) = DLL("KERNEL32.dll", "bool SetSystemFileCacheSize(int, int, dword)")
# 呼び出し: SetSystemFileCacheSize(MinimumFileCacheSize, MaximumFileCacheSize, Flags)
# MinimumFileCacheSize : UINT_PTR -> "int"
# MaximumFileCacheSize : UINT_PTR -> "int"
# Flags : 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)。