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