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scylladb/utils/limiting_data_source.hh

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/*
* Copyright (C) 2017-present ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stddef.h>
#include <seastar/util/noncopyable_function.hh>
namespace seastar {
class data_source;
}
/// \brief Creates an data_source from another data_source but returns its data in chunks not bigger than a given limit
///
/// \param src Source data_source from which data will be taken
/// \return resulting data_source that returns data in chunks not bigger than a given limit
seastar::data_source make_limiting_data_source(seastar::data_source&& src,
seastar::noncopyable_function<size_t()>&& limit_generator);