139 lines
4.3 KiB
C++
Executable File
139 lines
4.3 KiB
C++
Executable File
//
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// detail/memory.hpp
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// ~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2022 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_ASIO_DETAIL_MEMORY_HPP
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#define BOOST_ASIO_DETAIL_MEMORY_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <boost/asio/detail/config.hpp>
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#include <cstddef>
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#include <cstdlib>
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#include <memory>
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#include <new>
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#include <boost/asio/detail/throw_exception.hpp>
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#if !defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
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# include <boost/make_shared.hpp>
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# include <boost/shared_ptr.hpp>
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# include <boost/weak_ptr.hpp>
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#endif // !defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
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#if !defined(BOOST_ASIO_HAS_STD_ADDRESSOF)
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# include <boost/utility/addressof.hpp>
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#endif // !defined(BOOST_ASIO_HAS_STD_ADDRESSOF)
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#if !defined(BOOST_ASIO_HAS_STD_ALIGNED_ALLOC) \
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&& defined(BOOST_ASIO_HAS_BOOST_ALIGN) \
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&& defined(BOOST_ASIO_HAS_ALIGNOF)
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# include <boost/align/aligned_alloc.hpp>
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#endif // !defined(BOOST_ASIO_HAS_STD_ALIGNED_ALLOC)
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// && defined(BOOST_ASIO_HAS_BOOST_ALIGN)
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// && defined(BOOST_ASIO_HAS_ALIGNOF)
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namespace boost {
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namespace asio {
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namespace detail {
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#if defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
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using std::make_shared;
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using std::shared_ptr;
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using std::weak_ptr;
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#else // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
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using boost::make_shared;
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using boost::shared_ptr;
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using boost::weak_ptr;
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#endif // defined(BOOST_ASIO_HAS_STD_SHARED_PTR)
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#if defined(BOOST_ASIO_HAS_STD_ADDRESSOF)
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using std::addressof;
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#else // defined(BOOST_ASIO_HAS_STD_ADDRESSOF)
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using boost::addressof;
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#endif // defined(BOOST_ASIO_HAS_STD_ADDRESSOF)
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} // namespace detail
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#if defined(BOOST_ASIO_HAS_CXX11_ALLOCATORS)
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using std::allocator_arg_t;
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# define BOOST_ASIO_USES_ALLOCATOR(t) \
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namespace std { \
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template <typename Allocator> \
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struct uses_allocator<t, Allocator> : true_type {}; \
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} \
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/**/
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# define BOOST_ASIO_REBIND_ALLOC(alloc, t) \
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typename std::allocator_traits<alloc>::template rebind_alloc<t>
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/**/
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#else // defined(BOOST_ASIO_HAS_CXX11_ALLOCATORS)
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struct allocator_arg_t {};
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# define BOOST_ASIO_USES_ALLOCATOR(t)
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# define BOOST_ASIO_REBIND_ALLOC(alloc, t) \
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typename alloc::template rebind<t>::other
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/**/
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#endif // defined(BOOST_ASIO_HAS_CXX11_ALLOCATORS)
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inline void* aligned_new(std::size_t align, std::size_t size)
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{
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#if defined(BOOST_ASIO_HAS_STD_ALIGNED_ALLOC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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align = (align < BOOST_ASIO_DEFAULT_ALIGN) ? BOOST_ASIO_DEFAULT_ALIGN : align;
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size = (size % align == 0) ? size : size + (align - size % align);
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void* ptr = std::aligned_alloc(align, size);
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if (!ptr)
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{
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std::bad_alloc ex;
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boost::asio::detail::throw_exception(ex);
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}
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return ptr;
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#elif defined(BOOST_ASIO_HAS_BOOST_ALIGN) && defined(BOOST_ASIO_HAS_ALIGNOF)
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align = (align < BOOST_ASIO_DEFAULT_ALIGN) ? BOOST_ASIO_DEFAULT_ALIGN : align;
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size = (size % align == 0) ? size : size + (align - size % align);
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void* ptr = boost::alignment::aligned_alloc(align, size);
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if (!ptr)
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{
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std::bad_alloc ex;
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boost::asio::detail::throw_exception(ex);
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}
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return ptr;
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#elif defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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align = (align < BOOST_ASIO_DEFAULT_ALIGN) ? BOOST_ASIO_DEFAULT_ALIGN : align;
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size = (size % align == 0) ? size : size + (align - size % align);
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void* ptr = _aligned_malloc(size, align);
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if (!ptr)
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{
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std::bad_alloc ex;
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boost::asio::detail::throw_exception(ex);
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}
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return ptr;
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#else // defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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(void)align;
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return ::operator new(size);
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#endif // defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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}
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inline void aligned_delete(void* ptr)
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{
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#if defined(BOOST_ASIO_HAS_STD_ALIGNED_ALLOC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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std::free(ptr);
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#elif defined(BOOST_ASIO_HAS_BOOST_ALIGN) && defined(BOOST_ASIO_HAS_ALIGNOF)
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boost::alignment::aligned_free(ptr);
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#elif defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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_aligned_free(ptr);
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#else // defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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::operator delete(ptr);
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#endif // defined(BOOST_ASIO_MSVC) && defined(BOOST_ASIO_HAS_ALIGNOF)
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}
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} // namespace asio
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} // namespace boost
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#endif // BOOST_ASIO_DETAIL_MEMORY_HPP
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