74 lines
2 KiB
C
74 lines
2 KiB
C
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/*
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* transactionTable.h
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*
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* Created on: Oct 14, 2009
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* Author: sears
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*/
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#ifndef TRANSACTIONTABLE_H_
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#define TRANSACTIONTABLE_H_
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#include <stasis/common.h>
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typedef struct TransactionLog TransactionLog;
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/**
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Contains the state needed by the logging layer to perform
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operations on a transaction.
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*/
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struct TransactionLog {
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int xid;
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lsn_t prevLSN;
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lsn_t recLSN;
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pthread_mutex_t mut;
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};
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/**
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XXX TransactionTable should be private to transactional2.c!
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*/
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extern TransactionLog stasis_transaction_table[MAX_TRANSACTIONS];
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/**
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Initialize Stasis' transaction table. Called by Tinit() and unit
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tests that wish to test portions of Stasis in isolation.
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*/
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void stasis_transaction_table_init();
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/** Free resources associated with the transaction table */
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void stasis_transaction_table_deinit();
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/**
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* Used by recovery to prevent reuse of old transaction ids.
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*
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* Should not be used elsewhere.
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*
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* @param xid The highest transaction id issued so far.
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*/
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void stasis_transaction_table_max_transaction_id_set(int xid);
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/**
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* Used by test cases to mess with internal transaction table state.
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*
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* @param xid The new active transaction count.
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*/
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void stasis_transaction_table_active_transaction_count_set(int xid);
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int stasis_transaction_table_roll_forward(int xid, lsn_t lsn, lsn_t prevLSN);
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/**
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@todo update Tprepare() to not write reclsn to log, then remove
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this function.
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*/
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int stasis_transaction_table_roll_forward_with_reclsn(int xid, lsn_t lsn,
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lsn_t prevLSN,
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lsn_t recLSN);
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/**
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This is used by log truncation.
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*/
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lsn_t stasis_transaction_table_minRecLSN();
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TransactionLog * stasis_transaction_table_begin(int * xid);
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TransactionLog * stasis_transaction_table_get(int xid);
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int stasis_transaction_table_commit(int xid);
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int stasis_transaction_table_forget(int xid);
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int stasis_transaction_table_num_active();
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int* stasis_transaction_table_list_active();
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#endif /* TRANSACTIONTABLE_H_ */
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