62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#ifndef TRANSACTION_MANAGER_H
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#define TRANSACTION_MANAGER_H
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#include "block.h"
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#include "space_map.h"
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#include <set>
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#include <boost/shared_ptr.hpp>
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//----------------------------------------------------------------
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namespace persistent_data {
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template <uint32_t MetadataBlockSize>
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class transaction_manager : public boost::noncopyable {
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public:
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typedef boost::shared_ptr<transaction_manager<MetadataBlockSize> > ptr;
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transaction_manager(typename block_manager<MetadataBlockSize>::ptr bm,
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space_map::ptr sm);
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~transaction_manager();
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typedef typename block_manager<MetadataBlockSize>::read_ref read_ref;
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typedef typename block_manager<MetadataBlockSize>::write_ref write_ref;
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typedef typename block_manager<MetadataBlockSize>::block_validator block_validator;
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void reserve_block(block_address location);
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void begin();
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void pre_commit();
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void commit(write_ref superblock);
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block_address alloc_block();
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write_ref new_block();
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write_ref new_block(block_validator const &v);
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write_ref shadow(block_address orig, bool &inc_children);
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write_ref shadow(block_address orig, block_validator const &v, bool &inc_children);
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read_ref read_lock(block_address b);
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read_ref read_lock(block_address b, block_validator const &v);
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void inc(block_address b);
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void dec(block_address b);
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uint32_t ref_count(block_address b) const;
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private:
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void add_shadow(block_address b);
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bool is_shadow(block_address b);
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void wipe_shadow_table();
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typename block_manager<MetadataBlockSize>::ptr bm_;
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space_map::ptr sm_;
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std::set<block_address> shadows_;
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};
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}
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#include "transaction_manager.tcc"
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//----------------------------------------------------------------
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#endif
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