62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
#ifndef CACHE_METADATA_H
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#define CACHE_METADATA_H
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#include "base/endian_utils.h"
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#include "persistent-data/block.h"
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#include "persistent-data/data-structures/array.h"
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#include "persistent-data/data-structures/bitset.h"
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#include "persistent-data/space-maps/disk.h"
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#include "persistent-data/transaction_manager.h"
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#include "caching/superblock.h"
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#include "caching/hint_array.h"
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#include "caching/mapping_array.h"
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//----------------------------------------------------------------
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namespace caching {
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class metadata {
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public:
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enum open_type {
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CREATE
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};
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typedef block_manager<>::read_ref read_ref;
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typedef block_manager<>::write_ref write_ref;
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typedef boost::shared_ptr<metadata> ptr;
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metadata(block_manager<>::ptr bm, open_type ot, unsigned metadata_version = 2); // Create only
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metadata(block_manager<>::ptr bm);
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void commit(bool clean_shutdown = true);
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void setup_hint_array(size_t width);
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typedef persistent_data::transaction_manager tm;
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tm::ptr tm_;
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superblock sb_;
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checked_space_map::ptr metadata_sm_;
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mapping_array::ptr mappings_;
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hint_array::ptr hints_;
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persistent_data::bitset::ptr discard_bits_;
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persistent_data::bitset::ptr dirty_bits_;
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private:
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void init_superblock();
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void create_metadata(block_manager<>::ptr bm, unsigned metadata_version);
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void open_metadata(block_manager<>::ptr bm);
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void commit_space_map();
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void commit_mappings();
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void commit_hints();
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void commit_discard_bits();
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void commit_superblock(bool clean_shutdown);
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};
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};
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//----------------------------------------------------------------
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#endif
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