ホーム › Storage.FileSystem › ReadNextLogRecord

ReadNextLogRecord

関数

CLFSログの読み取りコンテキストで次のレコードを取得する。

DLLclfsw32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// clfsw32.dll
#include <windows.h>

BOOL ReadNextLogRecord(
    void* pvReadContext,
    void** ppvBuffer,
    DWORD* pcbBuffer,
    BYTE* peRecordType,
    CLS_LSN* plsnUser,
    CLS_LSN* plsnUndoNext,
    CLS_LSN* plsnPrevious,
    CLS_LSN* plsnRecord,
    OVERLAPPED* pOverlapped
);

パラメーター

名前	型	方向
pvReadContext	void*	inout
ppvBuffer	void**	inout
pcbBuffer	DWORD*	inout
peRecordType	BYTE*	inout
plsnUser	CLS_LSN*	inout
plsnUndoNext	CLS_LSN*	inout
plsnPrevious	CLS_LSN*	inout
plsnRecord	CLS_LSN*	inout
pOverlapped	OVERLAPPED*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// clfsw32.dll
#include <windows.h>

BOOL ReadNextLogRecord(
    void* pvReadContext,
    void** ppvBuffer,
    DWORD* pcbBuffer,
    BYTE* peRecordType,
    CLS_LSN* plsnUser,
    CLS_LSN* plsnUndoNext,
    CLS_LSN* plsnPrevious,
    CLS_LSN* plsnRecord,
    OVERLAPPED* pOverlapped
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("clfsw32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool ReadNextLogRecord(
    IntPtr pvReadContext,   // void* in/out
    IntPtr ppvBuffer,   // void** in/out
    ref uint pcbBuffer,   // DWORD* in/out
    IntPtr peRecordType,   // BYTE* in/out
    IntPtr plsnUser,   // CLS_LSN* in/out
    IntPtr plsnUndoNext,   // CLS_LSN* in/out
    IntPtr plsnPrevious,   // CLS_LSN* in/out
    IntPtr plsnRecord,   // CLS_LSN* in/out
    IntPtr pOverlapped   // OVERLAPPED* in/out
);

<DllImport("clfsw32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadNextLogRecord(
    pvReadContext As IntPtr,   ' void* in/out
    ppvBuffer As IntPtr,   ' void** in/out
    ByRef pcbBuffer As UInteger,   ' DWORD* in/out
    peRecordType As IntPtr,   ' BYTE* in/out
    plsnUser As IntPtr,   ' CLS_LSN* in/out
    plsnUndoNext As IntPtr,   ' CLS_LSN* in/out
    plsnPrevious As IntPtr,   ' CLS_LSN* in/out
    plsnRecord As IntPtr,   ' CLS_LSN* in/out
    pOverlapped As IntPtr   ' OVERLAPPED* in/out
) As Boolean
End Function

' pvReadContext : void* in/out
' ppvBuffer : void** in/out
' pcbBuffer : DWORD* in/out
' peRecordType : BYTE* in/out
' plsnUser : CLS_LSN* in/out
' plsnUndoNext : CLS_LSN* in/out
' plsnPrevious : CLS_LSN* in/out
' plsnRecord : CLS_LSN* in/out
' pOverlapped : OVERLAPPED* in/out
Declare PtrSafe Function ReadNextLogRecord Lib "clfsw32" ( _
    ByVal pvReadContext As LongPtr, _
    ByVal ppvBuffer As LongPtr, _
    ByRef pcbBuffer As Long, _
    ByVal peRecordType As LongPtr, _
    ByVal plsnUser As LongPtr, _
    ByVal plsnUndoNext As LongPtr, _
    ByVal plsnPrevious As LongPtr, _
    ByVal plsnRecord As LongPtr, _
    ByVal pOverlapped 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

ReadNextLogRecord = ctypes.windll.clfsw32.ReadNextLogRecord
ReadNextLogRecord.restype = wintypes.BOOL
ReadNextLogRecord.argtypes = [
    ctypes.POINTER(None),  # pvReadContext : void* in/out
    ctypes.c_void_p,  # ppvBuffer : void** in/out
    ctypes.POINTER(wintypes.DWORD),  # pcbBuffer : DWORD* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # peRecordType : BYTE* in/out
    ctypes.c_void_p,  # plsnUser : CLS_LSN* in/out
    ctypes.c_void_p,  # plsnUndoNext : CLS_LSN* in/out
    ctypes.c_void_p,  # plsnPrevious : CLS_LSN* in/out
    ctypes.c_void_p,  # plsnRecord : CLS_LSN* in/out
    ctypes.c_void_p,  # pOverlapped : OVERLAPPED* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('clfsw32.dll')
ReadNextLogRecord = Fiddle::Function.new(
  lib['ReadNextLogRecord'],
  [
    Fiddle::TYPE_VOIDP,  # pvReadContext : void* in/out
    Fiddle::TYPE_VOIDP,  # ppvBuffer : void** in/out
    Fiddle::TYPE_VOIDP,  # pcbBuffer : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # peRecordType : BYTE* in/out
    Fiddle::TYPE_VOIDP,  # plsnUser : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # plsnUndoNext : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # plsnPrevious : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # plsnRecord : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # pOverlapped : OVERLAPPED* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "clfsw32")]
extern "system" {
    fn ReadNextLogRecord(
        pvReadContext: *mut (),  // void* in/out
        ppvBuffer: *mut *mut (),  // void** in/out
        pcbBuffer: *mut u32,  // DWORD* in/out
        peRecordType: *mut u8,  // BYTE* in/out
        plsnUser: *mut CLS_LSN,  // CLS_LSN* in/out
        plsnUndoNext: *mut CLS_LSN,  // CLS_LSN* in/out
        plsnPrevious: *mut CLS_LSN,  // CLS_LSN* in/out
        plsnRecord: *mut CLS_LSN,  // CLS_LSN* in/out
        pOverlapped: *mut OVERLAPPED  // OVERLAPPED* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("clfsw32.dll", SetLastError = true)]
public static extern bool ReadNextLogRecord(IntPtr pvReadContext, IntPtr ppvBuffer, ref uint pcbBuffer, IntPtr peRecordType, IntPtr plsnUser, IntPtr plsnUndoNext, IntPtr plsnPrevious, IntPtr plsnRecord, IntPtr pOverlapped);
"@
$api = Add-Type -MemberDefinition $sig -Name 'clfsw32_ReadNextLogRecord' -Namespace Win32 -PassThru
# $api::ReadNextLogRecord(pvReadContext, ppvBuffer, pcbBuffer, peRecordType, plsnUser, plsnUndoNext, plsnPrevious, plsnRecord, pOverlapped)

#uselib "clfsw32.dll"
#func global ReadNextLogRecord "ReadNextLogRecord" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; ReadNextLogRecord pvReadContext, ppvBuffer, varptr(pcbBuffer), varptr(peRecordType), varptr(plsnUser), varptr(plsnUndoNext), varptr(plsnPrevious), varptr(plsnRecord), varptr(pOverlapped)   ; 戻り値は stat
; pvReadContext : void* in/out -> "sptr"
; ppvBuffer : void** in/out -> "sptr"
; pcbBuffer : DWORD* in/out -> "sptr"
; peRecordType : BYTE* in/out -> "sptr"
; plsnUser : CLS_LSN* in/out -> "sptr"
; plsnUndoNext : CLS_LSN* in/out -> "sptr"
; plsnPrevious : CLS_LSN* in/out -> "sptr"
; plsnRecord : CLS_LSN* in/out -> "sptr"
; pOverlapped : OVERLAPPED* 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 "clfsw32.dll"
#cfunc global ReadNextLogRecord "ReadNextLogRecord" sptr, sptr, var, var, var, var, var, var, var
; res = ReadNextLogRecord(pvReadContext, ppvBuffer, pcbBuffer, peRecordType, plsnUser, plsnUndoNext, plsnPrevious, plsnRecord, pOverlapped)
; pvReadContext : void* in/out -> "sptr"
; ppvBuffer : void** in/out -> "sptr"
; pcbBuffer : DWORD* in/out -> "var"
; peRecordType : BYTE* in/out -> "var"
; plsnUser : CLS_LSN* in/out -> "var"
; plsnUndoNext : CLS_LSN* in/out -> "var"
; plsnPrevious : CLS_LSN* in/out -> "var"
; plsnRecord : CLS_LSN* in/out -> "var"
; pOverlapped : OVERLAPPED* 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 "clfsw32.dll"
#cfunc global ReadNextLogRecord "ReadNextLogRecord" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; res = ReadNextLogRecord(pvReadContext, ppvBuffer, varptr(pcbBuffer), varptr(peRecordType), varptr(plsnUser), varptr(plsnUndoNext), varptr(plsnPrevious), varptr(plsnRecord), varptr(pOverlapped))
; pvReadContext : void* in/out -> "sptr"
; ppvBuffer : void** in/out -> "sptr"
; pcbBuffer : DWORD* in/out -> "sptr"
; peRecordType : BYTE* in/out -> "sptr"
; plsnUser : CLS_LSN* in/out -> "sptr"
; plsnUndoNext : CLS_LSN* in/out -> "sptr"
; plsnPrevious : CLS_LSN* in/out -> "sptr"
; plsnRecord : CLS_LSN* in/out -> "sptr"
; pOverlapped : OVERLAPPED* 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 ReadNextLogRecord(void* pvReadContext, void** ppvBuffer, DWORD* pcbBuffer, BYTE* peRecordType, CLS_LSN* plsnUser, CLS_LSN* plsnUndoNext, CLS_LSN* plsnPrevious, CLS_LSN* plsnRecord, OVERLAPPED* pOverlapped)
#uselib "clfsw32.dll"
#cfunc global ReadNextLogRecord "ReadNextLogRecord" intptr, intptr, var, var, var, var, var, var, var
; res = ReadNextLogRecord(pvReadContext, ppvBuffer, pcbBuffer, peRecordType, plsnUser, plsnUndoNext, plsnPrevious, plsnRecord, pOverlapped)
; pvReadContext : void* in/out -> "intptr"
; ppvBuffer : void** in/out -> "intptr"
; pcbBuffer : DWORD* in/out -> "var"
; peRecordType : BYTE* in/out -> "var"
; plsnUser : CLS_LSN* in/out -> "var"
; plsnUndoNext : CLS_LSN* in/out -> "var"
; plsnPrevious : CLS_LSN* in/out -> "var"
; plsnRecord : CLS_LSN* in/out -> "var"
; pOverlapped : OVERLAPPED* 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 ReadNextLogRecord(void* pvReadContext, void** ppvBuffer, DWORD* pcbBuffer, BYTE* peRecordType, CLS_LSN* plsnUser, CLS_LSN* plsnUndoNext, CLS_LSN* plsnPrevious, CLS_LSN* plsnRecord, OVERLAPPED* pOverlapped)
#uselib "clfsw32.dll"
#cfunc global ReadNextLogRecord "ReadNextLogRecord" intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr, intptr
; res = ReadNextLogRecord(pvReadContext, ppvBuffer, varptr(pcbBuffer), varptr(peRecordType), varptr(plsnUser), varptr(plsnUndoNext), varptr(plsnPrevious), varptr(plsnRecord), varptr(pOverlapped))
; pvReadContext : void* in/out -> "intptr"
; ppvBuffer : void** in/out -> "intptr"
; pcbBuffer : DWORD* in/out -> "intptr"
; peRecordType : BYTE* in/out -> "intptr"
; plsnUser : CLS_LSN* in/out -> "intptr"
; plsnUndoNext : CLS_LSN* in/out -> "intptr"
; plsnPrevious : CLS_LSN* in/out -> "intptr"
; plsnRecord : CLS_LSN* in/out -> "intptr"
; pOverlapped : OVERLAPPED* 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 (
	clfsw32 = windows.NewLazySystemDLL("clfsw32.dll")
	procReadNextLogRecord = clfsw32.NewProc("ReadNextLogRecord")
)

// pvReadContext (void* in/out), ppvBuffer (void** in/out), pcbBuffer (DWORD* in/out), peRecordType (BYTE* in/out), plsnUser (CLS_LSN* in/out), plsnUndoNext (CLS_LSN* in/out), plsnPrevious (CLS_LSN* in/out), plsnRecord (CLS_LSN* in/out), pOverlapped (OVERLAPPED* in/out)
r1, _, err := procReadNextLogRecord.Call(
	uintptr(pvReadContext),
	uintptr(ppvBuffer),
	uintptr(pcbBuffer),
	uintptr(peRecordType),
	uintptr(plsnUser),
	uintptr(plsnUndoNext),
	uintptr(plsnPrevious),
	uintptr(plsnRecord),
	uintptr(pOverlapped),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadNextLogRecord(
  pvReadContext: Pointer;   // void* in/out
  ppvBuffer: Pointer;   // void** in/out
  pcbBuffer: Pointer;   // DWORD* in/out
  peRecordType: Pointer;   // BYTE* in/out
  plsnUser: Pointer;   // CLS_LSN* in/out
  plsnUndoNext: Pointer;   // CLS_LSN* in/out
  plsnPrevious: Pointer;   // CLS_LSN* in/out
  plsnRecord: Pointer;   // CLS_LSN* in/out
  pOverlapped: Pointer   // OVERLAPPED* in/out
): BOOL; stdcall;
  external 'clfsw32.dll' name 'ReadNextLogRecord';

result := DllCall("clfsw32\ReadNextLogRecord"
    , "Ptr", pvReadContext   ; void* in/out
    , "Ptr", ppvBuffer   ; void** in/out
    , "Ptr", pcbBuffer   ; DWORD* in/out
    , "Ptr", peRecordType   ; BYTE* in/out
    , "Ptr", plsnUser   ; CLS_LSN* in/out
    , "Ptr", plsnUndoNext   ; CLS_LSN* in/out
    , "Ptr", plsnPrevious   ; CLS_LSN* in/out
    , "Ptr", plsnRecord   ; CLS_LSN* in/out
    , "Ptr", pOverlapped   ; OVERLAPPED* in/out
    , "Int")   ; return: BOOL

●ReadNextLogRecord(pvReadContext, ppvBuffer, pcbBuffer, peRecordType, plsnUser, plsnUndoNext, plsnPrevious, plsnRecord, pOverlapped) = DLL("clfsw32.dll", "bool ReadNextLogRecord(void*, void*, void*, void*, void*, void*, void*, void*, void*)")
# 呼び出し: ReadNextLogRecord(pvReadContext, ppvBuffer, pcbBuffer, peRecordType, plsnUser, plsnUndoNext, plsnPrevious, plsnRecord, pOverlapped)
# pvReadContext : void* in/out -> "void*"
# ppvBuffer : void** in/out -> "void*"
# pcbBuffer : DWORD* in/out -> "void*"
# peRecordType : BYTE* in/out -> "void*"
# plsnUser : CLS_LSN* in/out -> "void*"
# plsnUndoNext : CLS_LSN* in/out -> "void*"
# plsnPrevious : CLS_LSN* in/out -> "void*"
# plsnRecord : CLS_LSN* in/out -> "void*"
# pOverlapped : OVERLAPPED* 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)。