/* * 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/. * * Copyright 2015-2018 Danny Robson <danny@nerdcruft.net> */ #pragma once #include "../view.hpp" #include <cstddef> #include <utility> // C++11 allocator concept conformant(ish) allocator adaptor, going from our // allocator interface to that of the STL and friends. namespace cruft::alloc { template <typename ValueT, typename BackingT> class allocator { public: typedef ValueT value_type; template <typename ...Args> explicit allocator (Args&& ...args): m_backing (std::forward<Args> (args)...) { ; } cruft::view<ValueT*> allocate (size_t count) { return { reinterpret_cast<ValueT*> ( m_backing.template allocate ( sizeof (ValueT) * count, alignof (ValueT) ) ), count }; } void deallocate (ValueT *t, size_t count) { return m_backing.template deallocate (t, sizeof (ValueT) * count); } private: BackingT &m_backing; }; /////////////////////////////////////////////////////////////////////////// // convenience type-inferring constructor for allocators. template <typename ValueT, typename BackingT> auto make_allocator (BackingT &backing) { return allocator<ValueT,BackingT> (backing); } }