87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
#ifndef CACHE_HINT_ARRAY_H
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#define CACHE_HINT_ARRAY_H
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#include "persistent-data/data-structures/array.h"
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#include <string>
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//----------------------------------------------------------------
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namespace caching {
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namespace hint_array_damage {
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class damage_visitor;
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class damage {
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public:
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damage(std::string const &desc)
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: desc_(desc) {
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}
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virtual ~damage() {}
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virtual void visit(damage_visitor &v) const = 0;
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std::string get_desc() const {
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return desc_;
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}
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private:
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std::string desc_;
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};
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struct missing_hints : public damage {
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missing_hints(std::string const desc, run<uint32_t> const &keys);
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virtual void visit(damage_visitor &v) const;
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run<uint32_t> keys_;
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};
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class damage_visitor {
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public:
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virtual ~damage_visitor() {}
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void visit(damage const &d) {
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d.visit(*this);
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}
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virtual void visit(missing_hints const &d) = 0;
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};
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}
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class hint_visitor {
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public:
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virtual ~hint_visitor() {}
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virtual void visit(block_address cblock, std::vector<unsigned char> const &data) = 0;
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};
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class hint_array {
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public:
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typedef std::shared_ptr<hint_array> ptr;
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hint_array(transaction_manager &tm, unsigned width);
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hint_array(transaction_manager &tm, unsigned width, block_address root, unsigned nr_entries);
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unsigned get_nr_entries() const;
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void grow(unsigned new_nr_entries, void const *v);
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block_address get_root() const;
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void get_hint(unsigned index, vector<unsigned char> &data) const;
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void set_hint(unsigned index, vector<unsigned char> const &data);
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void grow(unsigned new_nr_entries, vector<unsigned char> const &value);
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void walk(hint_visitor &hv, hint_array_damage::damage_visitor &dv);
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void check(hint_array_damage::damage_visitor &visitor);
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private:
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static uint32_t check_width(uint32_t width);
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unsigned width_;
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std::shared_ptr<persistent_data::array_base> impl_;
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};
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}
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//----------------------------------------------------------------
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#endif
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