46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
/*
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* Copyright (C) 2015 Cloudius Systems, Ltd.
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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// Abstraction of transport protocol-dependent serialization format
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// Protocols v1, v2 used 16 bits for collection sizes, while v3 and
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// above use 32 bits. But letting every bit of the code know what
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// transport protocol we're using (and in some cases, we aren't using
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// any transport -- it's for internal storage) is bad, so abstract it
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// away here.
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class serialization_format {
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bool _use_32_bit;
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private:
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explicit serialization_format(bool use_32_bit) : _use_32_bit(use_32_bit) {}
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public:
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static serialization_format use_16_bit() { return serialization_format(false); }
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static serialization_format use_32_bit() { return serialization_format(true); }
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static serialization_format internal() { return use_32_bit(); }
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bool using_32_bits_for_collections() const { return _use_32_bit; }
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bool operator==(serialization_format x) const { return _use_32_bit == x._use_32_bit; }
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bool operator!=(serialization_format x) const { return !operator==(x); }
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};
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