57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "../view.hpp"
|
|
|
|
#include <cstddef>
|
|
|
|
namespace cruft::buffer {
|
|
// buffer size is advisory and will likely depend on page size. the user
|
|
// must check the size after creation if this field is important for
|
|
// their usage.
|
|
template <typename ValueT>
|
|
class circular {
|
|
public:
|
|
using value_type = ValueT;
|
|
using iterator = value_type*;
|
|
using const_iterator = const value_type*;
|
|
|
|
explicit circular (size_t bytes);
|
|
~circular ();
|
|
|
|
circular (const circular&) = delete;
|
|
circular (circular&&) = delete;
|
|
circular& operator= (const circular&) = delete;
|
|
circular& operator= (circular&&) = delete;
|
|
|
|
value_type& operator[] (size_t)&;
|
|
const value_type& operator[] (size_t) const&;
|
|
|
|
iterator begin (void)&;
|
|
iterator end (void)&;
|
|
|
|
const_iterator begin (void) const&;
|
|
const_iterator end (void) const&;
|
|
|
|
size_t size (void) const;
|
|
|
|
/// rebases the pointer so that it points to within the first
|
|
/// repetition of the data buffer.
|
|
iterator constrain (iterator);
|
|
/// rebases a pair of pointers so they fall within a contiguous span of
|
|
/// the data buffer.
|
|
cruft::view<iterator> constrain (cruft::view<iterator>);
|
|
|
|
private:
|
|
value_type *m_begin, *m_end;
|
|
|
|
};
|
|
}
|