77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 1998, Microsoft Corp. All rights reserved.
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//
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// FILE
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//
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// localtxn.h
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//
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// SYNOPSIS
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//
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// This file declares the class LocalTransaction.
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//
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// MODIFICATION HISTORY
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//
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// 03/14/1998 Original version.
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _LOCALTXN_H_
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#define _LOCALTXN_H_
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#if _MSC_VER >= 1000
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#pragma once
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#endif
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#include <nocopy.h>
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#include <oledb.h>
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///////////////////////////////////////////////////////////////////////////////
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//
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// CLASS
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//
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// LocalTransaction
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//
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// DESCRIPTION
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//
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// This class creates a scoped transaction on an OLE-DB session. If the
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// transaction is not committed before the object goes out of scope, it
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// will be aborted.
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//
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///////////////////////////////////////////////////////////////////////////////
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class LocalTransaction
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: NonCopyable
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{
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public:
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explicit LocalTransaction(IUnknown* session,
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ISOLEVEL isoLevel = ISOLATIONLEVEL_READCOMMITTED)
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{
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using _com_util::CheckError;
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CheckError(session->QueryInterface(__uuidof(ITransactionLocal),
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(PVOID*)&txn));
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CheckError(txn->StartTransaction(isoLevel, 0, NULL, NULL));
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}
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~LocalTransaction() throw ()
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{
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if (txn != NULL)
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{
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txn->Abort(NULL, FALSE, FALSE);
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}
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}
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void commit()
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{
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_com_util::CheckError(txn->Commit(FALSE, XACTTC_SYNC, 0));
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txn.Release();
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}
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protected:
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CComPtr<ITransactionLocal> txn;
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};
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#endif // _LOCALTXN_H_
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