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/* * subtrans.h * * PostgreSQL subtransaction-log manager * * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * src/include/access/subtrans.h */ #ifndef SUBTRANS_H #define SUBTRANS_H /* Number of SLRU buffers to use for subtrans */ #define NUM_SUBTRANS_BUFFERS 32 extern void SubTransSetParent(TransactionId xid, TransactionId parent, bool overwriteOK); extern TransactionId SubTransGetParent(TransactionId xid); extern TransactionId SubTransGetTopmostTransaction(TransactionId xid); extern Size SUBTRANSShmemSize(void); extern void SUBTRANSShmemInit(void); extern void BootStrapSUBTRANS(void); extern void StartupSUBTRANS(TransactionId oldestActiveXID); extern void ShutdownSUBTRANS(void); extern void CheckPointSUBTRANS(void); extern void ExtendSUBTRANS(TransactionId newestXact); extern void TruncateSUBTRANS(TransactionId oldestXact); #endif /* SUBTRANS_H */