зеркало из https://github.com/mozilla/gecko-dev.git
87 строки
2.7 KiB
C++
87 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Indexed Database.
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*
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* The Initial Developer of the Original Code is
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* The Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Shawn Wilsher <me@shawnwilsher.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef mozilla_dom_indexeddb_savepoint_h__
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#define mozilla_dom_indexeddb_savepoint_h__
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// Only meant to be included in IndexedDB source files, not exported.
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#include "IDBTransaction.h"
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BEGIN_INDEXEDDB_NAMESPACE
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NS_STACK_CLASS
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class Savepoint
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{
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public:
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Savepoint(IDBTransaction* aTransaction)
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: mTransaction(aTransaction)
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, mHasSavepoint(false)
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{
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NS_ASSERTION(mTransaction, "Null pointer!");
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mHasSavepoint = mTransaction->StartSavepoint();
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NS_WARN_IF_FALSE(mHasSavepoint, "Failed to make savepoint!");
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}
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~Savepoint()
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{
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if (mHasSavepoint) {
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mTransaction->RollbackSavepoint();
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}
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}
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nsresult Release()
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{
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nsresult rv = NS_OK;
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if (mHasSavepoint) {
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rv = mTransaction->ReleaseSavepoint();
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mHasSavepoint = false;
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}
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return rv;
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}
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private:
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IDBTransaction* mTransaction;
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bool mHasSavepoint;
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};
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END_INDEXEDDB_NAMESPACE
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#endif // mozilla_dom_indexeddb_savepoint_h__
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