76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// Copyright (C) 2013 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of 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 along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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#ifndef PERSISTENT_DATA_DATA_STRUCTURES_BITSET_H
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#define PERSISTENT_DATA_DATA_STRUCTURES_BITSET_H
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#include "persistent-data/run.h"
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//----------------------------------------------------------------
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namespace persistent_data {
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namespace bitset_detail {
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class bitset_impl;
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class missing_bits {
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public:
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missing_bits(base::run<uint32_t> const &keys)
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: keys_(keys) {
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}
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base::run<uint32_t> keys_;
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};
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class bitset_visitor {
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public:
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typedef std::shared_ptr<bitset_visitor> ptr;
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virtual ~bitset_visitor() {}
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virtual void visit(uint32_t index, bool value) = 0;
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virtual void visit(missing_bits const &d) = 0;
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};
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}
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class bitset {
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public:
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typedef std::shared_ptr<bitset> ptr;
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bitset(transaction_manager &tm);
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bitset(transaction_manager &tm,
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block_address root, unsigned nr_bits);
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block_address get_root() const;
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unsigned get_nr_bits() const;
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void grow(unsigned new_nr_bits, bool default_value);
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void destroy();
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// May trigger a flush, so cannot be const
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bool get(unsigned n);
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void set(unsigned n, bool value);
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void flush();
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void walk_bitset(bitset_detail::bitset_visitor &v) const;
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private:
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std::shared_ptr<bitset_detail::bitset_impl> impl_;
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};
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}
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//----------------------------------------------------------------
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#endif
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