HeapCompact

関数

ヒープの空き領域を結合し最大空きブロックを取得する。

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>

UINT_PTR HeapCompact(
    HANDLE hHeap,
    HEAP_FLAGS dwFlags
);

パラメーター

名前	型	方向
hHeap	HANDLE	in
dwFlags	HEAP_FLAGS	in

戻り値の型: UINT_PTR

各言語での呼び出し定義

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

UINT_PTR HeapCompact(
    HANDLE hHeap,
    HEAP_FLAGS dwFlags
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern UIntPtr HeapCompact(
    IntPtr hHeap,   // HANDLE
    uint dwFlags   // HEAP_FLAGS
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function HeapCompact(
    hHeap As IntPtr,   ' HANDLE
    dwFlags As UInteger   ' HEAP_FLAGS
) As UIntPtr
End Function

' hHeap : HANDLE
' dwFlags : HEAP_FLAGS
Declare PtrSafe Function HeapCompact Lib "kernel32" ( _
    ByVal hHeap As LongPtr, _
    ByVal dwFlags As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

HeapCompact = ctypes.windll.kernel32.HeapCompact
HeapCompact.restype = ctypes.c_size_t
HeapCompact.argtypes = [
    wintypes.HANDLE,  # hHeap : HANDLE
    wintypes.DWORD,  # dwFlags : HEAP_FLAGS
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
HeapCompact = Fiddle::Function.new(
  lib['HeapCompact'],
  [
    Fiddle::TYPE_VOIDP,  # hHeap : HANDLE
    -Fiddle::TYPE_INT,  # dwFlags : HEAP_FLAGS
  ],
  Fiddle::TYPE_UINTPTR_T)

#[link(name = "kernel32")]
extern "system" {
    fn HeapCompact(
        hHeap: *mut core::ffi::c_void,  // HANDLE
        dwFlags: u32  // HEAP_FLAGS
    ) -> usize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern UIntPtr HeapCompact(IntPtr hHeap, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_HeapCompact' -Namespace Win32 -PassThru
# $api::HeapCompact(hHeap, dwFlags)

#uselib "KERNEL32.dll"
#func global HeapCompact "HeapCompact" sptr, sptr
; HeapCompact hHeap, dwFlags   ; 戻り値は stat
; hHeap : HANDLE -> "sptr"
; dwFlags : HEAP_FLAGS -> "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 HeapCompact "HeapCompact" sptr, int
; res = HeapCompact(hHeap, dwFlags)
; hHeap : HANDLE -> "sptr"
; dwFlags : HEAP_FLAGS -> "int"

; UINT_PTR HeapCompact(HANDLE hHeap, HEAP_FLAGS dwFlags)
#uselib "KERNEL32.dll"
#cfunc global HeapCompact "HeapCompact" intptr, int
; res = HeapCompact(hHeap, dwFlags)
; hHeap : HANDLE -> "intptr"
; dwFlags : HEAP_FLAGS -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procHeapCompact = kernel32.NewProc("HeapCompact")
)

// hHeap (HANDLE), dwFlags (HEAP_FLAGS)
r1, _, err := procHeapCompact.Call(
	uintptr(hHeap),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UINT_PTR

function HeapCompact(
  hHeap: THandle;   // HANDLE
  dwFlags: DWORD   // HEAP_FLAGS
): NativeUInt; stdcall;
  external 'KERNEL32.dll' name 'HeapCompact';

result := DllCall("KERNEL32\HeapCompact"
    , "Ptr", hHeap   ; HANDLE
    , "UInt", dwFlags   ; HEAP_FLAGS
    , "UPtr")   ; return: UINT_PTR

●HeapCompact(hHeap, dwFlags) = DLL("KERNEL32.dll", "int HeapCompact(void*, dword)")
# 呼び出し: HeapCompact(hHeap, dwFlags)
# hHeap : HANDLE -> "void*"
# dwFlags : HEAP_FLAGS -> "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)。