JetRollback

関数

現在のトランザクションをロールバックして変更を取り消す。

DLLESENT.dll呼出規約winapi

シグネチャ

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

INT JetRollback(
    JET_SESID sesid,
    DWORD grbit
);

パラメーター

名前	型	方向
sesid	JET_SESID	in
grbit	DWORD	in

戻り値の型: INT

各言語での呼び出し定義

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

INT JetRollback(
    JET_SESID sesid,
    DWORD grbit
);

[DllImport("ESENT.dll", ExactSpelling = true)]
static extern int JetRollback(
    UIntPtr sesid,   // JET_SESID
    uint grbit   // DWORD
);

<DllImport("ESENT.dll", ExactSpelling:=True)>
Public Shared Function JetRollback(
    sesid As UIntPtr,   ' JET_SESID
    grbit As UInteger   ' DWORD
) As Integer
End Function

' sesid : JET_SESID
' grbit : DWORD
Declare PtrSafe Function JetRollback Lib "esent" ( _
    ByVal sesid As LongPtr, _
    ByVal grbit 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

JetRollback = ctypes.windll.esent.JetRollback
JetRollback.restype = ctypes.c_int
JetRollback.argtypes = [
    ctypes.c_size_t,  # sesid : JET_SESID
    wintypes.DWORD,  # grbit : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetRollback = Fiddle::Function.new(
  lib['JetRollback'],
  [
    Fiddle::TYPE_UINTPTR_T,  # sesid : JET_SESID
    -Fiddle::TYPE_INT,  # grbit : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "esent")]
extern "system" {
    fn JetRollback(
        sesid: usize,  // JET_SESID
        grbit: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll")]
public static extern int JetRollback(UIntPtr sesid, uint grbit);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetRollback' -Namespace Win32 -PassThru
# $api::JetRollback(sesid, grbit)

#uselib "ESENT.dll"
#func global JetRollback "JetRollback" sptr, sptr
; JetRollback sesid, grbit   ; 戻り値は stat
; sesid : JET_SESID -> "sptr"
; grbit : DWORD -> "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 "ESENT.dll"
#cfunc global JetRollback "JetRollback" sptr, int
; res = JetRollback(sesid, grbit)
; sesid : JET_SESID -> "sptr"
; grbit : DWORD -> "int"

; INT JetRollback(JET_SESID sesid, DWORD grbit)
#uselib "ESENT.dll"
#cfunc global JetRollback "JetRollback" intptr, int
; res = JetRollback(sesid, grbit)
; sesid : JET_SESID -> "intptr"
; grbit : DWORD -> "int"

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

var (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetRollback = esent.NewProc("JetRollback")
)

// sesid (JET_SESID), grbit (DWORD)
r1, _, err := procJetRollback.Call(
	uintptr(sesid),
	uintptr(grbit),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetRollback(
  sesid: NativeUInt;   // JET_SESID
  grbit: DWORD   // DWORD
): Integer; stdcall;
  external 'ESENT.dll' name 'JetRollback';

result := DllCall("ESENT\JetRollback"
    , "UPtr", sesid   ; JET_SESID
    , "UInt", grbit   ; DWORD
    , "Int")   ; return: INT

●JetRollback(sesid, grbit) = DLL("ESENT.dll", "int JetRollback(int, dword)")
# 呼び出し: JetRollback(sesid, grbit)
# sesid : JET_SESID -> "int"
# grbit : DWORD -> "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)。