70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
/*------------------------------------------------------------------------------*
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* Architecture & Implementation of DBMS *
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*------------------------------------------------------------------------------*
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* Copyright 2022 Databases and Information Systems Group TU Dortmund *
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* Visit us at *
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* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
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* OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Authors: *
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* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
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* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
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* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
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*------------------------------------------------------------------------------*
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*/
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#pragma once
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#include <table/tuple.h>
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#include <vector>
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namespace beedb::execution
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{
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/**
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* Buffers tuples; needed by blocking operators.
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*/
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class TupleBuffer
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{
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public:
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TupleBuffer() = default;
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~TupleBuffer() = default;
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void add(table::Tuple &&tuple)
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{
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_buffer.push_back(std::move(tuple));
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}
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void add(std::vector<table::Tuple> &&tuples)
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{
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std::move(tuples.begin(), tuples.end(), std::back_inserter(_buffer));
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}
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[[nodiscard]] bool empty() const
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{
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return _buffer.empty() || _head > _buffer.size() - 1;
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}
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[[nodiscard]] table::Tuple &&pop()
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{
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return std::move(_buffer[_head++]);
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}
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void clear()
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{
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_buffer.clear();
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_head = 0u;
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}
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private:
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std::vector<table::Tuple> _buffer;
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std::size_t _head = 0u;
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};
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} // namespace beedb::execution
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