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GetLogicalProcessorInformation

関数

論理プロセッサとその関連情報を取得する。

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 GetLogicalProcessorInformation(
    SYSTEM_LOGICAL_PROCESSOR_INFORMATION* Buffer,   // optional
    DWORD* ReturnedLength
);

パラメーター

名前	型	方向
Buffer	SYSTEM_LOGICAL_PROCESSOR_INFORMATION*	outoptional
ReturnedLength	DWORD*	inout

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetLogicalProcessorInformation(
    SYSTEM_LOGICAL_PROCESSOR_INFORMATION* Buffer,   // optional
    DWORD* ReturnedLength
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetLogicalProcessorInformation(
    IntPtr Buffer,   // SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
    ref uint ReturnedLength   // DWORD* in/out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetLogicalProcessorInformation(
    Buffer As IntPtr,   ' SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
    ByRef ReturnedLength As UInteger   ' DWORD* in/out
) As Boolean
End Function

' Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
' ReturnedLength : DWORD* in/out
Declare PtrSafe Function GetLogicalProcessorInformation Lib "kernel32" ( _
    ByVal Buffer As LongPtr, _
    ByRef ReturnedLength 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

GetLogicalProcessorInformation = ctypes.windll.kernel32.GetLogicalProcessorInformation
GetLogicalProcessorInformation.restype = wintypes.BOOL
GetLogicalProcessorInformation.argtypes = [
    ctypes.c_void_p,  # Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
    ctypes.POINTER(wintypes.DWORD),  # ReturnedLength : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetLogicalProcessorInformation = Fiddle::Function.new(
  lib['GetLogicalProcessorInformation'],
  [
    Fiddle::TYPE_VOIDP,  # Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
    Fiddle::TYPE_VOIDP,  # ReturnedLength : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetLogicalProcessorInformation(
        Buffer: *mut SYSTEM_LOGICAL_PROCESSOR_INFORMATION,  // SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
        ReturnedLength: *mut u32  // DWORD* in/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 GetLogicalProcessorInformation(IntPtr Buffer, ref uint ReturnedLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetLogicalProcessorInformation' -Namespace Win32 -PassThru
# $api::GetLogicalProcessorInformation(Buffer, ReturnedLength)

#uselib "KERNEL32.dll"
#func global GetLogicalProcessorInformation "GetLogicalProcessorInformation" sptr, sptr
; GetLogicalProcessorInformation varptr(Buffer), varptr(ReturnedLength)   ; 戻り値は stat
; Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "sptr"
; ReturnedLength : DWORD* 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 GetLogicalProcessorInformation "GetLogicalProcessorInformation" var, var
; res = GetLogicalProcessorInformation(Buffer, ReturnedLength)
; Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "var"
; ReturnedLength : DWORD* 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 GetLogicalProcessorInformation "GetLogicalProcessorInformation" sptr, sptr
; res = GetLogicalProcessorInformation(varptr(Buffer), varptr(ReturnedLength))
; Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "sptr"
; ReturnedLength : DWORD* 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:

; BOOL GetLogicalProcessorInformation(SYSTEM_LOGICAL_PROCESSOR_INFORMATION* Buffer, DWORD* ReturnedLength)
#uselib "KERNEL32.dll"
#cfunc global GetLogicalProcessorInformation "GetLogicalProcessorInformation" var, var
; res = GetLogicalProcessorInformation(Buffer, ReturnedLength)
; Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "var"
; ReturnedLength : DWORD* 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。; BOOL GetLogicalProcessorInformation(SYSTEM_LOGICAL_PROCESSOR_INFORMATION* Buffer, DWORD* ReturnedLength)
#uselib "KERNEL32.dll"
#cfunc global GetLogicalProcessorInformation "GetLogicalProcessorInformation" intptr, intptr
; res = GetLogicalProcessorInformation(varptr(Buffer), varptr(ReturnedLength))
; Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "intptr"
; ReturnedLength : DWORD* 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")
	procGetLogicalProcessorInformation = kernel32.NewProc("GetLogicalProcessorInformation")
)

// Buffer (SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out), ReturnedLength (DWORD* in/out)
r1, _, err := procGetLogicalProcessorInformation.Call(
	uintptr(Buffer),
	uintptr(ReturnedLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetLogicalProcessorInformation(
  Buffer: Pointer;   // SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
  ReturnedLength: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetLogicalProcessorInformation';

result := DllCall("KERNEL32\GetLogicalProcessorInformation"
    , "Ptr", Buffer   ; SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out
    , "Ptr", ReturnedLength   ; DWORD* in/out
    , "Int")   ; return: BOOL

●GetLogicalProcessorInformation(Buffer, ReturnedLength) = DLL("KERNEL32.dll", "bool GetLogicalProcessorInformation(void*, void*)")
# 呼び出し: GetLogicalProcessorInformation(Buffer, ReturnedLength)
# Buffer : SYSTEM_LOGICAL_PROCESSOR_INFORMATION* optional, out -> "void*"
# ReturnedLength : DWORD* 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)。