4 * PostgreSQL subtransaction-log manager
6 * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
9 * $PostgreSQL: pgsql/src/include/access/subtrans.h,v 1.12 2009/01/01 17:23:56 momjian Exp $
14 /* Number of SLRU buffers to use for subtrans */
15 #define NUM_SUBTRANS_BUFFERS 32
17 extern void SubTransSetParent(TransactionId xid, TransactionId parent);
18 extern TransactionId SubTransGetParent(TransactionId xid);
19 extern TransactionId SubTransGetTopmostTransaction(TransactionId xid);
21 extern Size SUBTRANSShmemSize(void);
22 extern void SUBTRANSShmemInit(void);
23 extern void BootStrapSUBTRANS(void);
24 extern void StartupSUBTRANS(TransactionId oldestActiveXID);
25 extern void ShutdownSUBTRANS(void);
26 extern void CheckPointSUBTRANS(void);
27 extern void ExtendSUBTRANS(TransactionId newestXact);
28 extern void TruncateSUBTRANS(TransactionId oldestXact);
30 #endif /* SUBTRANS_H */