libcruft-util/alloc/raw/aligned.hpp

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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2016 Danny Robson <danny@nerdcruft.net>
*/
#ifndef CRUFT_UTIL_ALLOC_RAW_ALIGNED_HPP
#define CRUFT_UTIL_ALLOC_RAW_ALIGNED_HPP
#include <cstddef>
#include <utility>
#include "../../debug.hpp"
namespace util::alloc::raw {
/// wraps a child allocator and enforces a fixed alignment
template <typename ChildT>
class aligned {
public:
///////////////////////////////////////////////////////////////////////
template <typename ...Args>
aligned (std::size_t _alignment, Args &&...args):
m_successor (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;
CHECK_EQ (alignment, m_alignment);
return m_successor.allocate (bytes, m_alignment);
}
//---------------------------------------------------------------------
auto
deallocate (void *ptr, std::size_t bytes)
{
return m_successor.deallocate (ptr, bytes);
}
//---------------------------------------------------------------------
auto
deallocate (void *ptr, std::size_t bytes, std::size_t alignment)
{
(void)alignment;
CHECK_EQ (alignment, m_alignment);
return m_successor.deallocate (ptr, bytes, m_alignment);
}
///////////////////////////////////////////////////////////////////////
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auto data (void) { return m_successor.data (); }
//---------------------------------------------------------------------
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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;
};
}
#endif