C++ (Cpp) ObjectStoreInfoArray::SwapElements示例

示例#1

文件： IDBFactory.cpp 项目： memorais/TC2_impl

// static
nsresult
IDBFactory::SetDatabaseMetadata(DatabaseInfo* aDatabaseInfo,
                                uint64_t aVersion,
                                ObjectStoreInfoArray& aObjectStores)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
  NS_ASSERTION(aDatabaseInfo, "Null pointer!");

  ObjectStoreInfoArray objectStores;
  objectStores.SwapElements(aObjectStores);

#ifdef DEBUG
  {
    nsTArray<nsString> existingNames;
    aDatabaseInfo->GetObjectStoreNames(existingNames);
    NS_ASSERTION(existingNames.IsEmpty(), "Should be an empty DatabaseInfo");
  }
#endif

  aDatabaseInfo->version = aVersion;

  for (uint32_t index = 0; index < objectStores.Length(); index++) {
    nsRefPtr<ObjectStoreInfo>& info = objectStores[index];

    if (!aDatabaseInfo->PutObjectStore(info)) {
      NS_WARNING("Out of memory!");
      return NS_ERROR_OUT_OF_MEMORY;
    }
  }

  return NS_OK;
}

示例#2

文件： IDBFactory.cpp 项目： krad-radio/mozilla-krad

// static
nsresult
IDBFactory::UpdateDatabaseMetadata(DatabaseInfo* aDatabaseInfo,
                                   PRUint64 aVersion,
                                   ObjectStoreInfoArray& aObjectStores)
{
  NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
  NS_ASSERTION(aDatabaseInfo, "Null pointer!");

  ObjectStoreInfoArray objectStores;
  if (!objectStores.SwapElements(aObjectStores)) {
    NS_WARNING("Out of memory!");
    return NS_ERROR_OUT_OF_MEMORY;
  }

  nsAutoTArray<nsString, 10> existingNames;
  if (!aDatabaseInfo->GetObjectStoreNames(existingNames)) {
    NS_WARNING("Out of memory!");
    return NS_ERROR_OUT_OF_MEMORY;
  }

  // Remove all the old ones.
  for (PRUint32 index = 0; index < existingNames.Length(); index++) {
    aDatabaseInfo->RemoveObjectStore(existingNames[index]);
  }

  aDatabaseInfo->version = aVersion;

  for (PRUint32 index = 0; index < objectStores.Length(); index++) {
    nsAutoPtr<ObjectStoreInfo>& info = objectStores[index];
    NS_ASSERTION(info->databaseId == aDatabaseInfo->id, "Huh?!");

    if (!aDatabaseInfo->PutObjectStore(info)) {
      NS_WARNING("Out of memory!");
      return NS_ERROR_OUT_OF_MEMORY;
    }

    info.forget();
  }

  return NS_OK;
}