| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| /* 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/. */ |
| |
| /* Useful extensions to UniquePtr. */ |
| |
| #ifndef mozilla_UniquePtrExtensions_h |
| #define mozilla_UniquePtrExtensions_h |
| |
| #include "mozilla/fallible.h" |
| #include "mozilla/UniquePtr.h" |
| |
| namespace mozilla { |
| |
| /** |
| * MakeUniqueFallible works exactly like MakeUnique, except that the memory |
| * allocation performed is done fallibly, i.e. it can return nullptr. |
| */ |
| template<typename T, typename... Args> |
| typename detail::UniqueSelector<T>::SingleObject |
| MakeUniqueFallible(Args&&... aArgs) |
| { |
| return UniquePtr<T>(new (fallible) T(Forward<Args>(aArgs)...)); |
| } |
| |
| template<typename T> |
| typename detail::UniqueSelector<T>::UnknownBound |
| MakeUniqueFallible(decltype(sizeof(int)) aN) |
| { |
| typedef typename RemoveExtent<T>::Type ArrayType; |
| return UniquePtr<T>(new (fallible) ArrayType[aN]()); |
| } |
| |
| template<typename T, typename... Args> |
| typename detail::UniqueSelector<T>::KnownBound |
| MakeUniqueFallible(Args&&... aArgs) = delete; |
| |
| } // namespace mozilla |
| |
| #endif // mozilla_UniquePtrExtensions_h |
