97 lines
2.6 KiB
C++
97 lines
2.6 KiB
C++
// Copyright (C) 2011 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 BLOCK_COUNTER_H
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#define BLOCK_COUNTER_H
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#include "base/run_set.h"
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#include "block.h"
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//----------------------------------------------------------------
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namespace persistent_data {
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//----------------------------------------------------------------
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// Little helper class that keeps track of how many times blocks
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// are referenced.
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//----------------------------------------------------------------
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class block_counter {
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public:
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typedef std::map<block_address, unsigned> count_map;
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block_counter(): stop_on_error_(false) {}
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block_counter(bool stop_on_error)
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: stop_on_error_(stop_on_error) {
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}
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virtual ~block_counter() {}
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virtual void inc(block_address b) {
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count_map::iterator it = counts_.find(b);
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if (it == counts_.end())
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counts_.insert(std::make_pair(b, 1));
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else
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it->second++;
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}
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virtual unsigned get_count(block_address b) const {
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count_map::const_iterator it = counts_.find(b);
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return (it == counts_.end()) ? 0 : it->second;
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}
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count_map const &get_counts() const {
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return counts_;
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}
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virtual bool stop_on_error() {
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return stop_on_error_;
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}
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private:
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count_map counts_;
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bool stop_on_error_;
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};
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//----------------------------------------------------------------
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// Little helper class that keeps track of which blocks
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// are referenced.
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//----------------------------------------------------------------
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class binary_block_counter : public block_counter {
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public:
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virtual ~binary_block_counter() {}
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virtual void inc(block_address b) {
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visited_.add(b);
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}
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virtual unsigned get_count(block_address b) const {
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return visited_.member(b) ? 1 : 0;
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}
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base::run_set<block_address> const& get_visited() const {
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return visited_;
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}
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private:
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base::run_set<block_address> visited_;
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};
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}
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//----------------------------------------------------------------
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#endif
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