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| Current File : //usr/local/include/postgresql/server/access/clog.h |
/* * clog.h * * PostgreSQL transaction-commit-log manager * * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $PostgreSQL: pgsql/src/include/access/clog.h,v 1.21 2008/01/01 19:45:56 momjian Exp $ */ #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 /* Number of SLRU buffers to use for clog */ #define NUM_CLOG_BUFFERS 8 extern void TransactionIdSetStatus(TransactionId xid, XidStatus status, XLogRecPtr lsn); extern XidStatus TransactionIdGetStatus(TransactionId xid, XLogRecPtr *lsn); extern Size CLOGShmemSize(void); extern void CLOGShmemInit(void); extern void BootStrapCLOG(void); extern void StartupCLOG(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 */