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

44 lines
1.2 KiB
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 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "../view.hpp"
#include <cstddef>
namespace cruft::alloc {
/// a raw memory allocator which initialises an instance of PrefixT
/// immediately before each allocation and, if specified, an instance
/// of SuffixT after the allocation.
///
/// uses an instance of ParentT to actually perform the bulk allocations.
///
/// useful for sentinels, reference counts, etc.
template <class ParentT, class PrefixT, class SuffixT>
class affix {
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*>);
std::byte* begin (void);
const std::byte* begin (void) const;
std::byte* end (void);
const std::byte* end (void) const;
size_t offset (const void*) const;
};
}