85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
#ifndef CACHE_MAPPING_ARRAY_H
|
|
#define CACHE_MAPPING_ARRAY_H
|
|
|
|
#include "persistent-data/data-structures/array.h"
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace caching {
|
|
enum mapping_flags {
|
|
M_VALID = 1,
|
|
M_DIRTY = 2
|
|
};
|
|
|
|
struct mapping {
|
|
uint64_t oblock_;
|
|
uint32_t flags_;
|
|
};
|
|
|
|
struct mapping_traits {
|
|
typedef base::le64 disk_type;
|
|
typedef mapping value_type;
|
|
typedef no_op_ref_counter<value_type> ref_counter;
|
|
|
|
static void unpack(disk_type const &disk, value_type &value);
|
|
static void pack(value_type const &value, disk_type &disk);
|
|
};
|
|
|
|
namespace mapping_array_damage {
|
|
class damage_visitor;
|
|
|
|
class damage {
|
|
public:
|
|
damage(std::string const &desc)
|
|
: desc_(desc) {
|
|
}
|
|
|
|
virtual ~damage() {}
|
|
virtual void visit(damage_visitor &v) const = 0;
|
|
|
|
std::string get_desc() const {
|
|
return desc_;
|
|
}
|
|
|
|
private:
|
|
std::string desc_;
|
|
};
|
|
|
|
struct missing_mappings : public damage {
|
|
missing_mappings(std::string const &desc, run<uint32_t> const &keys);
|
|
virtual void visit(damage_visitor &v) const;
|
|
|
|
run<uint32_t> keys_;
|
|
};
|
|
|
|
struct invalid_mapping : public damage {
|
|
invalid_mapping(std::string const &desc, block_address cblock, mapping const &m);
|
|
virtual void visit(damage_visitor &v) const;
|
|
|
|
block_address cblock_;
|
|
mapping m_;
|
|
};
|
|
|
|
class damage_visitor {
|
|
public:
|
|
virtual ~damage_visitor() {}
|
|
|
|
virtual void visit(mapping_array_damage::damage const &d) {
|
|
d.visit(*this);
|
|
}
|
|
|
|
virtual void visit(missing_mappings const &d) = 0;
|
|
virtual void visit(invalid_mapping const &d) = 0;
|
|
};
|
|
}
|
|
|
|
typedef persistent_data::array<mapping_traits> mapping_array;
|
|
|
|
void check_mapping_array(mapping_array const &array,
|
|
mapping_array_damage::damage_visitor &visitor);
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
#endif
|