The Tor Browser: storage/src/mozStorageStatementData.h@129ffea94266 (annotated)

storage/src/mozStorageStatementData.h@129ffea94266 (annotated)

storage/src/mozStorageStatementData.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  * vim: sw=2 ts=2 sts=2 et
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef mozStorageStatementData_h
 #define mozStorageStatementData_h
 #include "sqlite3.h"
 #include "nsAutoPtr.h"
 #include "nsTArray.h"
 #include "nsIEventTarget.h"
 #include "MainThreadUtils.h"
 #include "mozStorageBindingParamsArray.h"
 #include "mozIStorageBaseStatement.h"
 #include "mozStorageConnection.h"
 #include "StorageBaseStatementInternal.h"
 struct sqlite3_stmt;
 namespace mozilla {
 namespace storage {
 class StatementData
 {
 public:
   StatementData(sqlite3_stmt *aStatement,
                 already_AddRefed<BindingParamsArray> aParamsArray,
                 StorageBaseStatementInternal *aStatementOwner)
   : mStatement(aStatement)
   , mParamsArray(aParamsArray)
   , mStatementOwner(aStatementOwner)
   {
     NS_PRECONDITION(mStatementOwner, "Must have a statement owner!");
   }
   StatementData(const StatementData &aSource)
   : mStatement(aSource.mStatement)
   , mParamsArray(aSource.mParamsArray)
   , mStatementOwner(aSource.mStatementOwner)
   {
     NS_PRECONDITION(mStatementOwner, "Must have a statement owner!");
   }
   StatementData()
   {
   }
   ~StatementData()
   {
     // We need to ensure that mParamsArray is released on the main thread,
     // as the binding arguments may be XPConnect values, which are safe
     // to release only on the main thread.
     nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
     (void)NS_ProxyRelease(mainThread, mParamsArray);
   }
   /**
    * Return the sqlite statement, fetching it from the storage statement.  In
    * the case of AsyncStatements this may actually create the statement
    */
   inline int getSqliteStatement(sqlite3_stmt **_stmt)
   {
     if (!mStatement) {
       int rc = mStatementOwner->getAsyncStatement(&mStatement);
       NS_ENSURE_TRUE(rc == SQLITE_OK, rc);
     }
     *_stmt = mStatement;
     return SQLITE_OK;
   }
   operator BindingParamsArray *() const { return mParamsArray; }
   /**
    * NULLs out our sqlite3_stmt (it is held by the owner) after reseting it and
    * clear all bindings to it.  This is expected to occur on the async thread.
    */
   inline void reset()
   {
     NS_PRECONDITION(mStatementOwner, "Must have a statement owner!");
 #ifdef DEBUG
     {
       nsCOMPtr<nsIEventTarget> asyncThread =
         mStatementOwner->getOwner()->getAsyncExecutionTarget();
       // It's possible that we are shutting down the async thread, and this
       // method would return nullptr as a result.
       if (asyncThread) {
         bool onAsyncThread;
         NS_ASSERTION(NS_SUCCEEDED(asyncThread->IsOnCurrentThread(&onAsyncThread)) && onAsyncThread,
                      "This should only be running on the async thread!");
       }
     }
 #endif
     // In the AsyncStatement case we may never have populated mStatement if the
     // AsyncExecuteStatements got canceled or a failure occurred in constructing
     // the statement.
     if (mStatement) {
       (void)::sqlite3_reset(mStatement);
       (void)::sqlite3_clear_bindings(mStatement);
       mStatement = nullptr;
     }
   }
   /**
    * Indicates if this statement has parameters to be bound before it is
    * executed.
    *
    * @return true if the statement has parameters to bind against, false
    *         otherwise.
    */
   inline bool hasParametersToBeBound() const { return !!mParamsArray; }
   /**
    * Indicates the number of implicit statements generated by this statement
    * requiring a transaction for execution.  For example a single statement
    * with N BindingParams will execute N implicit staments.
    *
    * @return number of statements requiring a transaction for execution.
    *
    * @note In the case of AsyncStatements this may actually create the
    *       statement.
    */
   inline uint32_t needsTransaction()
   {
     MOZ_ASSERT(!NS_IsMainThread());
     // Be sure to use the getSqliteStatement helper, since sqlite3_stmt_readonly
     // can only analyze prepared statements and AsyncStatements are prepared
     // lazily.
     sqlite3_stmt *stmt;
     int rc = getSqliteStatement(&stmt);
     if (SQLITE_OK != rc || ::sqlite3_stmt_readonly(stmt)) {
       return 0;
     }
     return mParamsArray ? mParamsArray->length() : 1;
   }
 private:
   sqlite3_stmt *mStatement;
   nsRefPtr<BindingParamsArray> mParamsArray;
   /**
    * We hold onto a reference of the statement's owner so it doesn't get
    * destroyed out from under us.
    */
   nsCOMPtr<StorageBaseStatementInternal> mStatementOwner;
 };
 } // namespace storage
 } // namespace mozilla
 #endif // mozStorageStatementData_h

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storage/src/mozStorageStatementData.h@129ffea94266 (annotated)

storage/src/mozStorageStatementData.h