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a89b67e772
Backed out changeset a8518ea4b594 (bug 1479960)
Backed out changeset 7172762c4b87 (bug 1536697)
Backed out changeset 2ea5ccb8f3a1 (bug 1426526)
Backed out changeset d892a888fe9c (bug 1426526)
Backed out changeset 2c4d12bdfec3 (bug 1479960)
Backed out changeset 8a322064cf6d (bug 1479960)
Backed out changeset 47d387b6cd4a (bug 1479960)
Backed out changeset 8332565a6943 (bug 1479960)
Backed out changeset 9d7f1835f96f (bug 1479960)
Backed out changeset 0aa8af4965c5 (bug 1479960)
Backed out changeset 036809330a51 (bug 1479960)
Backed out changeset 39e18373e3d3 (bug 1479960)
Backed out changeset 6c2b995a9d30 (bug 1479960)
Backed out changeset 3c2b31744645 (bug 1534780)
Backed out changeset 26bb00a94d5d (bug 1534780)
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Useful extensions to UniquePtr. */
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#ifndef mozilla_UniquePtrExtensions_h
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#define mozilla_UniquePtrExtensions_h
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#include "mozilla/fallible.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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/**
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* MakeUniqueFallible works exactly like MakeUnique, except that the memory
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* allocation performed is done fallibly, i.e. it can return nullptr.
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*/
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template <typename T, typename... Args>
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typename detail::UniqueSelector<T>::SingleObject MakeUniqueFallible(
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Args&&... aArgs) {
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return UniquePtr<T>(new (fallible) T(std::forward<Args>(aArgs)...));
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}
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template <typename T>
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typename detail::UniqueSelector<T>::UnknownBound MakeUniqueFallible(
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decltype(sizeof(int)) aN) {
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typedef typename RemoveExtent<T>::Type ArrayType;
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return UniquePtr<T>(new (fallible) ArrayType[aN]());
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}
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template <typename T, typename... Args>
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typename detail::UniqueSelector<T>::KnownBound MakeUniqueFallible(
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Args&&... aArgs) = delete;
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namespace detail {
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template <typename T>
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struct FreePolicy {
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void operator()(const void* ptr) { free(const_cast<void*>(ptr)); }
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};
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} // namespace detail
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template <typename T>
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using UniqueFreePtr = UniquePtr<T, detail::FreePolicy<T>>;
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} // namespace mozilla
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#endif // mozilla_UniquePtrExtensions_h
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