зеркало из https://github.com/mozilla/pjs.git
180 строки
5.3 KiB
C++
180 строки
5.3 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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* Ben Turner <bent.mozilla@gmail.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_transactionthreadpool_h__
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#define mozilla_dom_indexeddb_transactionthreadpool_h__
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// Only meant to be included in IndexedDB source files, not exported.
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#include "IndexedDatabase.h"
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#include "nsIObserver.h"
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#include "nsIRunnable.h"
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#include "mozilla/Monitor.h"
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#include "nsClassHashtable.h"
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#include "nsHashKeys.h"
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#include "nsRefPtrHashtable.h"
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#include "IDBTransaction.h"
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class nsIThreadPool;
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BEGIN_INDEXEDDB_NAMESPACE
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class FinishTransactionRunnable;
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class QueuedDispatchInfo;
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class TransactionThreadPool
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{
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friend class nsAutoPtr<TransactionThreadPool>;
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friend class FinishTransactionRunnable;
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public:
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// returns a non-owning ref!
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static TransactionThreadPool* GetOrCreate();
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// returns a non-owning ref!
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static TransactionThreadPool* Get();
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static void Shutdown();
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nsresult Dispatch(IDBTransaction* aTransaction,
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nsIRunnable* aRunnable,
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bool aFinish,
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nsIRunnable* aFinishRunnable);
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bool WaitForAllDatabasesToComplete(
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nsTArray<nsRefPtr<IDBDatabase> >& aDatabases,
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nsIRunnable* aCallback);
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// Abort all transactions, unless they are already in the process of being
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// committed, for aDatabase.
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void AbortTransactionsForDatabase(IDBDatabase* aDatabase);
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// Returns true if there are running or pending transactions for aDatabase.
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bool HasTransactionsForDatabase(IDBDatabase* aDatabase);
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protected:
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class TransactionQueue : public nsIRunnable
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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inline TransactionQueue(IDBTransaction* aTransaction,
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nsIRunnable* aRunnable);
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inline void Dispatch(nsIRunnable* aRunnable);
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inline void Finish(nsIRunnable* aFinishRunnable);
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private:
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mozilla::Monitor mMonitor;
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IDBTransaction* mTransaction;
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nsAutoTArray<nsCOMPtr<nsIRunnable>, 10> mQueue;
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nsCOMPtr<nsIRunnable> mFinishRunnable;
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bool mShouldFinish;
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};
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struct TransactionInfo
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{
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nsRefPtr<IDBTransaction> transaction;
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nsRefPtr<TransactionQueue> queue;
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nsTArray<nsString> objectStoreNames;
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};
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struct DatabaseTransactionInfo
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{
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nsTArray<TransactionInfo> transactions;
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nsTArray<nsString> storesReading;
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nsTArray<nsString> storesWriting;
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};
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struct QueuedDispatchInfo
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{
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QueuedDispatchInfo()
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: finish(false)
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{ }
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nsRefPtr<IDBTransaction> transaction;
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nsCOMPtr<nsIRunnable> runnable;
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nsCOMPtr<nsIRunnable> finishRunnable;
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bool finish;
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};
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struct DatabasesCompleteCallback
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{
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nsTArray<nsRefPtr<IDBDatabase> > mDatabases;
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nsCOMPtr<nsIRunnable> mCallback;
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};
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TransactionThreadPool();
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~TransactionThreadPool();
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nsresult Init();
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nsresult Cleanup();
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void FinishTransaction(IDBTransaction* aTransaction);
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nsresult TransactionCanRun(IDBTransaction* aTransaction,
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bool* aCanRun,
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TransactionQueue** aExistingQueue);
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nsresult Dispatch(const QueuedDispatchInfo& aInfo)
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{
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return Dispatch(aInfo.transaction, aInfo.runnable, aInfo.finish,
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aInfo.finishRunnable);
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}
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void MaybeFireCallback(PRUint32 aCallbackIndex);
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nsCOMPtr<nsIThreadPool> mThreadPool;
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nsClassHashtable<nsISupportsHashKey, DatabaseTransactionInfo>
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mTransactionsInProgress;
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nsTArray<QueuedDispatchInfo> mDelayedDispatchQueue;
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nsTArray<DatabasesCompleteCallback> mCompleteCallbacks;
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};
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END_INDEXEDDB_NAMESPACE
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#endif // mozilla_dom_indexeddb_transactionthreadpool_h__
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