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