42 lines
975 B
C
42 lines
975 B
C
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#ifndef BLOCK_COUNTER_H
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#define BLOCK_COUNTER_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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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(make_pair(b, 1));
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else
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it->second++;
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}
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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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private:
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count_map counts_;
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};
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}
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//----------------------------------------------------------------
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#endif
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