libcruft-util/cruft/util/alloc/fallback.hpp

41 lines
993 B
C++

/*
* 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 2015-2017 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "../view.hpp"
#include <cstddef>
#include <tuple>
namespace cruft::alloc {
/// A raw memory allocator that allocates memory series of child
/// allocators, preferring earlier allocators.
template <typename ...ChildT>
class fallback {
public:
fallback (ChildT &..._children):
m_children (_children...)
{ ; }
template <typename T>
cruft::view<T*>
allocate (size_t bytes);
template <typename T>
cruft::view<T*>
allocate (size_t bytes, size_t align);
template <typename T>
void deallocate (cruft::view<std::byte*> ptr);
private:
std::tuple<ChildT&...> m_children;
};
}