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35ca020a6b
This patch add an RAII helper class QuotaDatabaseAutoAttacher, which provides an Attach() and Detach() method, and guarantees that the database will be detached in it's destructor when an instance of this class is out of scope. Differential Revision: https://phabricator.services.mozilla.com/D128042
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef DOM_QUOTA_QUOTADATABASEHELPER_H
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#define DOM_QUOTA_QUOTADATABASEHELPER_H
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#include "mozilla/dom/quota/QuotaCommon.h"
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#include "mozIStorageConnection.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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namespace mozilla::dom::quota {
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/**
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* This class provides a RAII wrap of attaching and detaching database
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* in a given C++ scope. It is guaranteed that an attached database will
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* be detached even if you have an exception or return early.
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*
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* @param aConnection
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* The connection to attach a database to.
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* @param aDatabaseFile
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* The database file to attach.
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* @param aSchemaName
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* The schema-name. Can be any string literal which is supported by the
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* underlying database. For more details about schema-name, see
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* https://www.sqlite.org/lang_attach.html
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*/
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class MOZ_STACK_CLASS AutoDatabaseAttacher final {
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public:
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explicit AutoDatabaseAttacher(nsCOMPtr<mozIStorageConnection> aConnection,
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nsCOMPtr<nsIFile> aDatabaseFile,
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const nsLiteralCString& aSchemaName);
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~AutoDatabaseAttacher();
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AutoDatabaseAttacher() = delete;
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[[nodiscard]] nsresult Attach();
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[[nodiscard]] nsresult Detach();
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private:
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nsCOMPtr<mozIStorageConnection> mConnection;
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nsCOMPtr<nsIFile> mDatabaseFile;
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const nsLiteralCString mSchemaName;
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bool mAttached;
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};
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} // namespace mozilla::dom::quota
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#endif // DOM_QUOTA_QUOTADATABASEHELPER_H
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