/* -*- 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 detail { template<typename T> struct FreePolicy { void operator()(const void* ptr) { free(const_cast<void*>(ptr)); } }; } // namespace detail template<typename T> using UniqueFreePtr = UniquePtr<T, detail::FreePolicy<T>>; } // namespace mozilla #endif // mozilla_UniquePtrExtensions_h