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GetPhysicallyInstalledSystemMemory

関数

物理的に搭載された総メモリ量をキロバイト単位で取得する。

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 GetPhysicallyInstalledSystemMemory(
    ULONGLONG* TotalMemoryInKilobytes
);

パラメーター

名前	型	方向
TotalMemoryInKilobytes	ULONGLONG*	out

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetPhysicallyInstalledSystemMemory(
    ULONGLONG* TotalMemoryInKilobytes
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetPhysicallyInstalledSystemMemory(
    out ulong TotalMemoryInKilobytes   // ULONGLONG* out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetPhysicallyInstalledSystemMemory(
    <Out> ByRef TotalMemoryInKilobytes As ULong   ' ULONGLONG* out
) As Boolean
End Function

' TotalMemoryInKilobytes : ULONGLONG* out
Declare PtrSafe Function GetPhysicallyInstalledSystemMemory Lib "kernel32" ( _
    ByRef TotalMemoryInKilobytes As LongLong) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetPhysicallyInstalledSystemMemory = ctypes.windll.kernel32.GetPhysicallyInstalledSystemMemory
GetPhysicallyInstalledSystemMemory.restype = wintypes.BOOL
GetPhysicallyInstalledSystemMemory.argtypes = [
    ctypes.POINTER(ctypes.c_ulonglong),  # TotalMemoryInKilobytes : ULONGLONG* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetPhysicallyInstalledSystemMemory = Fiddle::Function.new(
  lib['GetPhysicallyInstalledSystemMemory'],
  [
    Fiddle::TYPE_VOIDP,  # TotalMemoryInKilobytes : ULONGLONG* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetPhysicallyInstalledSystemMemory(
        TotalMemoryInKilobytes: *mut u64  // ULONGLONG* out
    ) -> 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 GetPhysicallyInstalledSystemMemory(out ulong TotalMemoryInKilobytes);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetPhysicallyInstalledSystemMemory' -Namespace Win32 -PassThru
# $api::GetPhysicallyInstalledSystemMemory(TotalMemoryInKilobytes)

#uselib "KERNEL32.dll"
#func global GetPhysicallyInstalledSystemMemory "GetPhysicallyInstalledSystemMemory" sptr
; GetPhysicallyInstalledSystemMemory varptr(TotalMemoryInKilobytes)   ; 戻り値は stat
; TotalMemoryInKilobytes : ULONGLONG* 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 GetPhysicallyInstalledSystemMemory "GetPhysicallyInstalledSystemMemory" var
; res = GetPhysicallyInstalledSystemMemory(TotalMemoryInKilobytes)
; TotalMemoryInKilobytes : ULONGLONG* 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 GetPhysicallyInstalledSystemMemory "GetPhysicallyInstalledSystemMemory" sptr
; res = GetPhysicallyInstalledSystemMemory(varptr(TotalMemoryInKilobytes))
; TotalMemoryInKilobytes : ULONGLONG* 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:

; BOOL GetPhysicallyInstalledSystemMemory(ULONGLONG* TotalMemoryInKilobytes)
#uselib "KERNEL32.dll"
#cfunc global GetPhysicallyInstalledSystemMemory "GetPhysicallyInstalledSystemMemory" var
; res = GetPhysicallyInstalledSystemMemory(TotalMemoryInKilobytes)
; TotalMemoryInKilobytes : ULONGLONG* 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。; BOOL GetPhysicallyInstalledSystemMemory(ULONGLONG* TotalMemoryInKilobytes)
#uselib "KERNEL32.dll"
#cfunc global GetPhysicallyInstalledSystemMemory "GetPhysicallyInstalledSystemMemory" intptr
; res = GetPhysicallyInstalledSystemMemory(varptr(TotalMemoryInKilobytes))
; TotalMemoryInKilobytes : ULONGLONG* 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")
	procGetPhysicallyInstalledSystemMemory = kernel32.NewProc("GetPhysicallyInstalledSystemMemory")
)

// TotalMemoryInKilobytes (ULONGLONG* out)
r1, _, err := procGetPhysicallyInstalledSystemMemory.Call(
	uintptr(TotalMemoryInKilobytes),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetPhysicallyInstalledSystemMemory(
  TotalMemoryInKilobytes: Pointer   // ULONGLONG* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetPhysicallyInstalledSystemMemory';

result := DllCall("KERNEL32\GetPhysicallyInstalledSystemMemory"
    , "Ptr", TotalMemoryInKilobytes   ; ULONGLONG* out
    , "Int")   ; return: BOOL

●GetPhysicallyInstalledSystemMemory(TotalMemoryInKilobytes) = DLL("KERNEL32.dll", "bool GetPhysicallyInstalledSystemMemory(void*)")
# 呼び出し: GetPhysicallyInstalledSystemMemory(TotalMemoryInKilobytes)
# TotalMemoryInKilobytes : ULONGLONG* 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)。