libcruft-util/alloc/raw/aligned/direct.hpp

102 lines
3.2 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 2016-2018 Danny Robson <danny@nerdcruft.net>
*/
#pragma once
#include "../../../std.hpp"
#include "../../../debug.hpp"
#include "../../../view.hpp"
#include <utility>
namespace cruft::alloc::raw::aligned {
/// wraps a child allocator and enforces a fixed alignment
template <typename ChildT>
class direct {
public:
///////////////////////////////////////////////////////////////////////
template <typename ...Args>
direct (
cruft::view<u08*> _data,
std::size_t _alignment,
Args &&...args
)
: m_successor (_data, std::forward<Args> (args)...)
, m_alignment (_alignment)
{ ; }
///////////////////////////////////////////////////////////////////////
auto allocate (std::size_t bytes)
{
return m_successor.allocate (bytes, m_alignment);
}
//---------------------------------------------------------------------
auto allocate (std::size_t bytes, std::size_t alignment)
{
(void)alignment;
return m_successor.allocate (bytes, m_alignment);
}
//---------------------------------------------------------------------
auto deallocate (u08 *ptr, std::size_t bytes, std::size_t alignment)
{
(void)alignment;
return m_successor.deallocate (ptr, bytes, m_alignment);
}
//---------------------------------------------------------------------
auto deallocate (u08 *ptr, std::size_t bytes)
{
return m_successor.deallocate (ptr, bytes, m_alignment);
}
///////////////////////////////////////////////////////////////////////
constexpr auto alignment (void) const noexcept { return m_alignment; }
///////////////////////////////////////////////////////////////////////
auto data (void) { return m_successor.data (); }
//---------------------------------------------------------------------
auto begin (void) { return m_successor.begin (); }
auto begin (void) const { return m_successor.begin (); }
auto end (void) { return m_successor.end (); }
auto end (void) const { return m_successor.end (); }
//---------------------------------------------------------------------
auto
offset (const void *ptr) const
{
return m_successor.offset (ptr);
}
///////////////////////////////////////////////////////////////////////
auto reset (void) { return m_successor.reset (); }
///////////////////////////////////////////////////////////////////////
auto capacity (void) const { return m_successor.capacity (); }
auto used (void) const { return m_successor.used (); }
auto remain (void) const { return m_successor.remain (); }
private:
ChildT m_successor;
std::size_t m_alignment;
};
}