mirror of
https://github.com/matrix-construct/construct
synced 2024-12-28 00:14:07 +01:00
85 lines
2 KiB
C++
85 lines
2 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_BUFFER_SHARED_BUFFER_H
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/// Like shared_ptr, this template shares ownership of an allocated buffer
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///
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template<class buffer>
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struct ircd::buffer::shared_buffer
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:buffer
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{
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std::shared_ptr<char> sp;
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shared_buffer(unique_buffer<buffer> &&) noexcept;
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explicit shared_buffer(const size_t &size, const size_t &align = 0);
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explicit shared_buffer(const const_buffer &);
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shared_buffer() = default;
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shared_buffer(shared_buffer &&) = default;
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shared_buffer(const shared_buffer &) = default;
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shared_buffer &operator=(shared_buffer &&) = default;
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shared_buffer &operator=(const shared_buffer &) = default;
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shared_buffer &operator=(unique_buffer<buffer> &&) noexcept;
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~shared_buffer() = default;
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};
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template<class buffer>
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ircd::buffer::shared_buffer<buffer>::shared_buffer(const const_buffer &src)
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:shared_buffer
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{
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unique_buffer<buffer>
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{
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src
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}
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}
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{}
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template<class buffer>
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ircd::buffer::shared_buffer<buffer>::shared_buffer(const size_t &size,
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const size_t &align)
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:shared_buffer
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{
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unique_buffer<buffer>
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{
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size, align
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}
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}
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{}
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template<class buffer>
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ircd::buffer::shared_buffer<buffer>::shared_buffer(unique_buffer<buffer> &&buf)
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noexcept
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:buffer
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{
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data(buf), size(buf)
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}
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,sp
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{
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data(buf), &std::free
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}
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{
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buf.release();
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}
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template<class buffer>
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ircd::buffer::shared_buffer<buffer> &
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ircd::buffer::shared_buffer<buffer>::operator=(unique_buffer<buffer> &&buf)
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noexcept
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{
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sp.reset(data(buf), &std::free);
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*static_cast<buffer *>(this) = buffer
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{
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sp.get(), size(buf)
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};
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buf.release();
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return *this;
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}
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