LCOV - code coverage report
Current view: directory - dom/indexedDB - TransactionThreadPool.h (source / functions) Found Hit Coverage
Test: app.info Lines: 10 10 100.0 %
Date: 2012-06-02 Functions: 10 10 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim: set ts=2 et sw=2 tw=80: */
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Indexed Database.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * The Mozilla Foundation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Ben Turner <bent.mozilla@gmail.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef mozilla_dom_indexeddb_transactionthreadpool_h__
      41                 : #define mozilla_dom_indexeddb_transactionthreadpool_h__
      42                 : 
      43                 : // Only meant to be included in IndexedDB source files, not exported.
      44                 : #include "IndexedDatabase.h"
      45                 : 
      46                 : #include "nsIObserver.h"
      47                 : #include "nsIRunnable.h"
      48                 : 
      49                 : #include "mozilla/Monitor.h"
      50                 : #include "nsClassHashtable.h"
      51                 : #include "nsHashKeys.h"
      52                 : #include "nsRefPtrHashtable.h"
      53                 : 
      54                 : #include "IDBTransaction.h"
      55                 : 
      56                 : class nsIThreadPool;
      57                 : 
      58                 : BEGIN_INDEXEDDB_NAMESPACE
      59                 : 
      60                 : class FinishTransactionRunnable;
      61                 : class QueuedDispatchInfo;
      62                 : 
      63                 : class TransactionThreadPool
      64                 : {
      65                 :   friend class nsAutoPtr<TransactionThreadPool>;
      66                 :   friend class FinishTransactionRunnable;
      67                 : 
      68                 : public:
      69                 :   // returns a non-owning ref!
      70                 :   static TransactionThreadPool* GetOrCreate();
      71                 : 
      72                 :   // returns a non-owning ref!
      73                 :   static TransactionThreadPool* Get();
      74                 : 
      75                 :   static void Shutdown();
      76                 : 
      77                 :   nsresult Dispatch(IDBTransaction* aTransaction,
      78                 :                     nsIRunnable* aRunnable,
      79                 :                     bool aFinish,
      80                 :                     nsIRunnable* aFinishRunnable);
      81                 : 
      82                 :   bool WaitForAllDatabasesToComplete(
      83                 :                                    nsTArray<nsRefPtr<IDBDatabase> >& aDatabases,
      84                 :                                    nsIRunnable* aCallback);
      85                 : 
      86                 :   // Abort all transactions, unless they are already in the process of being
      87                 :   // committed, for aDatabase.
      88                 :   void AbortTransactionsForDatabase(IDBDatabase* aDatabase);
      89                 : 
      90                 :   // Returns true if there are running or pending transactions for aDatabase.
      91                 :   bool HasTransactionsForDatabase(IDBDatabase* aDatabase);
      92                 : 
      93                 : protected:
      94                 :   class TransactionQueue : public nsIRunnable
      95             540 :   {
      96                 :   public:
      97                 :     NS_DECL_ISUPPORTS
      98                 :     NS_DECL_NSIRUNNABLE
      99                 : 
     100                 :     inline TransactionQueue(IDBTransaction* aTransaction,
     101                 :                             nsIRunnable* aRunnable);
     102                 : 
     103                 :     inline void Dispatch(nsIRunnable* aRunnable);
     104                 : 
     105                 :     inline void Finish(nsIRunnable* aFinishRunnable);
     106                 : 
     107                 :   private:
     108                 :     mozilla::Monitor mMonitor;
     109                 :     IDBTransaction* mTransaction;
     110                 :     nsAutoTArray<nsCOMPtr<nsIRunnable>, 10> mQueue;
     111                 :     nsCOMPtr<nsIRunnable> mFinishRunnable;
     112                 :     bool mShouldFinish;
     113                 :   };
     114                 : 
     115                 :   struct TransactionInfo
     116            1080 :   {
     117                 :     nsRefPtr<IDBTransaction> transaction;
     118                 :     nsRefPtr<TransactionQueue> queue;
     119                 :     nsTArray<nsString> objectStoreNames;
     120                 :   };
     121                 : 
     122                 :   struct DatabaseTransactionInfo
     123             808 :   {
     124                 :     nsTArray<TransactionInfo> transactions;
     125                 :     nsTArray<nsString> storesReading;
     126                 :     nsTArray<nsString> storesWriting;
     127                 :   };
     128                 : 
     129                 :   struct QueuedDispatchInfo
     130            1133 :   {
     131            1133 :     QueuedDispatchInfo()
     132            1133 :     : finish(false)
     133            1133 :     { }
     134                 : 
     135                 :     nsRefPtr<IDBTransaction> transaction;
     136                 :     nsCOMPtr<nsIRunnable> runnable;
     137                 :     nsCOMPtr<nsIRunnable> finishRunnable;
     138                 :     bool finish;
     139                 :   };
     140                 : 
     141                 :   struct DatabasesCompleteCallback
     142               6 :   {
     143                 :     nsTArray<nsRefPtr<IDBDatabase> > mDatabases;
     144                 :     nsCOMPtr<nsIRunnable> mCallback;
     145                 :   };
     146                 : 
     147                 :   TransactionThreadPool();
     148                 :   ~TransactionThreadPool();
     149                 : 
     150                 :   nsresult Init();
     151                 :   nsresult Cleanup();
     152                 : 
     153                 :   void FinishTransaction(IDBTransaction* aTransaction);
     154                 : 
     155                 :   nsresult TransactionCanRun(IDBTransaction* aTransaction,
     156                 :                              bool* aCanRun,
     157                 :                              TransactionQueue** aExistingQueue);
     158                 : 
     159            1133 :   nsresult Dispatch(const QueuedDispatchInfo& aInfo)
     160                 :   {
     161                 :     return Dispatch(aInfo.transaction, aInfo.runnable, aInfo.finish,
     162            1133 :                     aInfo.finishRunnable);
     163                 :   }
     164                 : 
     165                 :   void MaybeFireCallback(PRUint32 aCallbackIndex);
     166                 : 
     167                 :   nsCOMPtr<nsIThreadPool> mThreadPool;
     168                 : 
     169                 :   nsClassHashtable<nsISupportsHashKey, DatabaseTransactionInfo>
     170                 :     mTransactionsInProgress;
     171                 : 
     172                 :   nsTArray<QueuedDispatchInfo> mDelayedDispatchQueue;
     173                 : 
     174                 :   nsTArray<DatabasesCompleteCallback> mCompleteCallbacks;
     175                 : };
     176                 : 
     177                 : END_INDEXEDDB_NAMESPACE
     178                 : 
     179                 : #endif // mozilla_dom_indexeddb_transactionthreadpool_h__

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