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GetProcessIoCounters

関数

プロセスの入出力操作のカウンタ情報を取得する。

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 GetProcessIoCounters(
    HANDLE hProcess,
    IO_COUNTERS* lpIoCounters
);

パラメーター

名前	型	方向
hProcess	HANDLE	in
lpIoCounters	IO_COUNTERS*	out

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL GetProcessIoCounters(
    HANDLE hProcess,
    IO_COUNTERS* lpIoCounters
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool GetProcessIoCounters(
    IntPtr hProcess,   // HANDLE
    IntPtr lpIoCounters   // IO_COUNTERS* out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetProcessIoCounters(
    hProcess As IntPtr,   ' HANDLE
    lpIoCounters As IntPtr   ' IO_COUNTERS* out
) As Boolean
End Function

' hProcess : HANDLE
' lpIoCounters : IO_COUNTERS* out
Declare PtrSafe Function GetProcessIoCounters Lib "kernel32" ( _
    ByVal hProcess As LongPtr, _
    ByVal lpIoCounters 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

GetProcessIoCounters = ctypes.windll.kernel32.GetProcessIoCounters
GetProcessIoCounters.restype = wintypes.BOOL
GetProcessIoCounters.argtypes = [
    wintypes.HANDLE,  # hProcess : HANDLE
    ctypes.c_void_p,  # lpIoCounters : IO_COUNTERS* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetProcessIoCounters = Fiddle::Function.new(
  lib['GetProcessIoCounters'],
  [
    Fiddle::TYPE_VOIDP,  # hProcess : HANDLE
    Fiddle::TYPE_VOIDP,  # lpIoCounters : IO_COUNTERS* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetProcessIoCounters(
        hProcess: *mut core::ffi::c_void,  // HANDLE
        lpIoCounters: *mut IO_COUNTERS  // IO_COUNTERS* 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 GetProcessIoCounters(IntPtr hProcess, IntPtr lpIoCounters);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetProcessIoCounters' -Namespace Win32 -PassThru
# $api::GetProcessIoCounters(hProcess, lpIoCounters)

#uselib "KERNEL32.dll"
#func global GetProcessIoCounters "GetProcessIoCounters" sptr, sptr
; GetProcessIoCounters hProcess, varptr(lpIoCounters)   ; 戻り値は stat
; hProcess : HANDLE -> "sptr"
; lpIoCounters : IO_COUNTERS* 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 GetProcessIoCounters "GetProcessIoCounters" sptr, var
; res = GetProcessIoCounters(hProcess, lpIoCounters)
; hProcess : HANDLE -> "sptr"
; lpIoCounters : IO_COUNTERS* 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 GetProcessIoCounters "GetProcessIoCounters" sptr, sptr
; res = GetProcessIoCounters(hProcess, varptr(lpIoCounters))
; hProcess : HANDLE -> "sptr"
; lpIoCounters : IO_COUNTERS* 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 GetProcessIoCounters(HANDLE hProcess, IO_COUNTERS* lpIoCounters)
#uselib "KERNEL32.dll"
#cfunc global GetProcessIoCounters "GetProcessIoCounters" intptr, var
; res = GetProcessIoCounters(hProcess, lpIoCounters)
; hProcess : HANDLE -> "intptr"
; lpIoCounters : IO_COUNTERS* 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 GetProcessIoCounters(HANDLE hProcess, IO_COUNTERS* lpIoCounters)
#uselib "KERNEL32.dll"
#cfunc global GetProcessIoCounters "GetProcessIoCounters" intptr, intptr
; res = GetProcessIoCounters(hProcess, varptr(lpIoCounters))
; hProcess : HANDLE -> "intptr"
; lpIoCounters : IO_COUNTERS* 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")
	procGetProcessIoCounters = kernel32.NewProc("GetProcessIoCounters")
)

// hProcess (HANDLE), lpIoCounters (IO_COUNTERS* out)
r1, _, err := procGetProcessIoCounters.Call(
	uintptr(hProcess),
	uintptr(lpIoCounters),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function GetProcessIoCounters(
  hProcess: THandle;   // HANDLE
  lpIoCounters: Pointer   // IO_COUNTERS* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'GetProcessIoCounters';

result := DllCall("KERNEL32\GetProcessIoCounters"
    , "Ptr", hProcess   ; HANDLE
    , "Ptr", lpIoCounters   ; IO_COUNTERS* out
    , "Int")   ; return: BOOL

●GetProcessIoCounters(hProcess, lpIoCounters) = DLL("KERNEL32.dll", "bool GetProcessIoCounters(void*, void*)")
# 呼び出し: GetProcessIoCounters(hProcess, lpIoCounters)
# hProcess : HANDLE -> "void*"
# lpIoCounters : IO_COUNTERS* 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)。