mirror of
https://github.com/matrix-construct/construct
synced 2024-11-26 08:42:34 +01:00
102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
// 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_UNIQUE_BUFFER_H
|
|
|
|
/// Like unique_ptr, this template holds ownership of an allocated buffer
|
|
///
|
|
template<class buffer,
|
|
uint alignment>
|
|
struct ircd::buffer::unique_buffer
|
|
:buffer
|
|
{
|
|
unique_buffer(std::unique_ptr<uint8_t[]> &&, const size_t &size);
|
|
unique_buffer(const size_t &size);
|
|
unique_buffer();
|
|
unique_buffer(unique_buffer &&) noexcept;
|
|
unique_buffer(const unique_buffer &) = delete;
|
|
unique_buffer &operator=(unique_buffer &&) noexcept;
|
|
unique_buffer &operator=(const unique_buffer &) = delete;
|
|
~unique_buffer() noexcept;
|
|
};
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment>::unique_buffer()
|
|
:buffer
|
|
{
|
|
nullptr, nullptr
|
|
}
|
|
{}
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment>::unique_buffer(std::unique_ptr<uint8_t[]> &&b,
|
|
const size_t &size)
|
|
:buffer
|
|
{
|
|
typename buffer::iterator(b.release()), size
|
|
}
|
|
{}
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment>::unique_buffer(const size_t &size)
|
|
:unique_buffer<buffer, alignment>
|
|
{
|
|
std::unique_ptr<uint8_t[]>
|
|
{
|
|
//TODO: Can't use a template parameter to the attribute even though
|
|
// it's known at compile time. Hardcoding this until fixed with better
|
|
// aligned dynamic memory.
|
|
//new __attribute__((aligned(alignment))) uint8_t[size]
|
|
new __attribute__((aligned(16))) uint8_t[size]
|
|
},
|
|
size
|
|
}
|
|
{
|
|
// Alignment can only be 16 bytes for now
|
|
assert(alignment == 16);
|
|
}
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment>::unique_buffer(unique_buffer &&other)
|
|
noexcept
|
|
:buffer
|
|
{
|
|
std::move(static_cast<buffer &>(other))
|
|
}
|
|
{
|
|
get<0>(other) = nullptr;
|
|
}
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment> &
|
|
ircd::buffer::unique_buffer<buffer, alignment>::operator=(unique_buffer &&other)
|
|
noexcept
|
|
{
|
|
this->~unique_buffer();
|
|
|
|
static_cast<buffer &>(*this) = std::move(static_cast<buffer &>(other));
|
|
get<0>(other) = nullptr;
|
|
|
|
return *this;
|
|
}
|
|
|
|
template<class buffer,
|
|
uint alignment>
|
|
ircd::buffer::unique_buffer<buffer, alignment>::~unique_buffer()
|
|
noexcept
|
|
{
|
|
delete[] data(*this);
|
|
}
|