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/* * clog.h * * PostgreSQL transaction-commit-log manager * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/access/clog.h */ #ifndef CLOG_H #define CLOG_H #include "access/xlog.h" /* * Possible transaction statuses --- note that all-zeroes is the initial * state. * * A "subcommitted" transaction is a committed subtransaction whose parent * hasn't committed or aborted yet. */ typedef int XidStatus; #define TRANSACTION_STATUS_IN_PROGRESS 0x00 #define TRANSACTION_STATUS_COMMITTED 0x01 #define TRANSACTION_STATUS_ABORTED 0x02 #define TRANSACTION_STATUS_SUB_COMMITTED 0x03 extern void TransactionIdSetTreeStatus(TransactionId xid, int nsubxids, TransactionId *subxids, XidStatus status, XLogRecPtr lsn); extern XidStatus TransactionIdGetStatus(TransactionId xid, XLogRecPtr *lsn); extern Size CLOGShmemBuffers(void); extern Size CLOGShmemSize(void); extern void CLOGShmemInit(void); extern void BootStrapCLOG(void); extern void StartupCLOG(void); extern void TrimCLOG(void); extern void ShutdownCLOG(void); extern void CheckPointCLOG(void); extern void ExtendCLOG(TransactionId newestXact); extern void TruncateCLOG(TransactionId oldestXact); /* XLOG stuff */ #define CLOG_ZEROPAGE 0x00 #define CLOG_TRUNCATE 0x10 extern void clog_redo(XLogRecPtr lsn, XLogRecord *record); extern void clog_desc(StringInfo buf, uint8 xl_info, char *rec); #endif /* CLOG_H */