mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#pragma once
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#include "td/utils/buffer.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Span.h"
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#include "td/utils/Status.h"
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#include "td/utils/port/IoSlice.h"
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namespace td {
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// Generic stream interface
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// Will to hide implementations details.
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// CyclicBuffer, ChainBuffer, Bounded ChainBuffer, some clever writers. They all should be interchangable
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// Most implementaions will assume that reading and writing may happen concurrently
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class StreamReaderInterface {
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public:
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virtual ~StreamReaderInterface() {
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}
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virtual size_t reader_size() = 0;
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virtual Slice prepare_read() = 0;
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virtual Span<IoSlice> prepare_readv() = 0;
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virtual void confirm_read(size_t size) = 0;
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virtual void close_reader(Status error) = 0;
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virtual bool is_writer_closed() const = 0;
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virtual Status &writer_status() = 0;
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};
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class StreamWriterInterface {
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public:
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virtual ~StreamWriterInterface() {
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}
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virtual size_t writer_size() = 0;
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virtual MutableSlice prepare_write() = 0;
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virtual MutableSlice prepare_write_at_least(size_t size) = 0;
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virtual void confirm_write(size_t size) = 0;
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virtual void append(Slice data) = 0;
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virtual void append(BufferSlice data) {
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append(data.as_slice());
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}
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virtual void append(std::string data) {
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append(Slice(data));
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}
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virtual void close_writer(Status error) = 0;
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virtual bool is_reader_closed() const = 0;
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virtual Status &reader_status() = 0;
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};
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// Hide shared_ptr
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class StreamReader : public StreamReaderInterface {
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public:
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StreamReader() = default;
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StreamReader(std::shared_ptr<StreamReaderInterface> self);
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size_t reader_size() override;
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Slice prepare_read() override;
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Span<IoSlice> prepare_readv() override;
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void confirm_read(size_t size) override;
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void close_reader(Status error) override;
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bool is_writer_closed() const override;
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Status &writer_status() override;
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private:
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std::shared_ptr<StreamReaderInterface> self;
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};
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class StreamWriter : public StreamWriterInterface {
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public:
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StreamWriter() = default;
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StreamWriter(std::shared_ptr<StreamWriterInterface> self);
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size_t writer_size() override;
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MutableSlice prepare_write() override;
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MutableSlice prepare_write_at_least(size_t size) override;
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void confirm_write(size_t size) override;
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void append(Slice data) override;
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void append(BufferSlice data) override;
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void append(std::string data) override;
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void close_writer(Status error) override;
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bool is_reader_closed() const override;
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Status &reader_status() override;
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private:
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std::shared_ptr<StreamWriterInterface> self;
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};
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} // namespace td
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