storage/mozStorageBindingParamsArray.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozStorageBindingParamsArray.h"
   8 #include "mozStorageBindingParams.h"
   9 #include "StorageBaseStatementInternal.h"
  10
  11 namespace mozilla {
  12 namespace storage {
  13
  14 ////////////////////////////////////////////////////////////////////////////////
  15 //// BindingParamsArray
  16
  17 BindingParamsArray::BindingParamsArray(
  18     StorageBaseStatementInternal* aOwningStatement)
  19     : mOwningStatement(aOwningStatement), mLocked(false) {}
  20
  21 void BindingParamsArray::lock() {
  22   NS_ASSERTION(mLocked == false, "Array has already been locked!");
  23   mLocked = true;
  24
  25   // We also no longer need to hold a reference to our statement since it owns
  26   // us.
  27   mOwningStatement = nullptr;
  28 }
  29
  30 const StorageBaseStatementInternal* BindingParamsArray::getOwner() const {
  31   return mOwningStatement;
  32 }
  33
  34 NS_IMPL_ISUPPORTS(BindingParamsArray, mozIStorageBindingParamsArray)
  35
  36 ///////////////////////////////////////////////////////////////////////////////
  37 //// mozIStorageBindingParamsArray
  38
  39 NS_IMETHODIMP
  40 BindingParamsArray::NewBindingParams(mozIStorageBindingParams** _params) {
  41   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
  42
  43   nsCOMPtr<mozIStorageBindingParams> params(
  44       mOwningStatement->newBindingParams(this));
  45   NS_ENSURE_TRUE(params, NS_ERROR_UNEXPECTED);
  46
  47   params.forget(_params);
  48   return NS_OK;
  49 }
  50
  51 NS_IMETHODIMP
  52 BindingParamsArray::AddParams(mozIStorageBindingParams* aParameters) {
  53   NS_ENSURE_FALSE(mLocked, NS_ERROR_UNEXPECTED);
  54
  55   BindingParams* params = static_cast<BindingParams*>(aParameters);
  56
  57   // Check to make sure that this set of parameters was created with us.
  58   if (params->getOwner() != this) return NS_ERROR_UNEXPECTED;
  59
  60   mArray.AppendElement(params);
  61
  62   // Lock the parameters only after we've successfully added them.
  63   params->lock();
  64
  65   return NS_OK;
  66 }
  67
  68 NS_IMETHODIMP
  69 BindingParamsArray::GetLength(uint32_t* _length) {
  70   *_length = length();
  71   return NS_OK;
  72 }
  73
  74 }  // namespace storage
  75 }  // namespace mozilla