PostgreSQL Source Code: src/include/access/subtrans.h Source File

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00001 /*
00002  * subtrans.h
00003  *
00004  * PostgreSQL subtransaction-log manager
00005  *
00006  * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
00007  * Portions Copyright (c) 1994, Regents of the University of California
00008  *
00009  * src/include/access/subtrans.h
00010  */
00011 #ifndef SUBTRANS_H
00012 #define SUBTRANS_H
00013 
00014 /* Number of SLRU buffers to use for subtrans */
00015 #define NUM_SUBTRANS_BUFFERS    32
00016 
00017 extern void SubTransSetParent(TransactionId xid, TransactionId parent, bool overwriteOK);
00018 extern TransactionId SubTransGetParent(TransactionId xid);
00019 extern TransactionId SubTransGetTopmostTransaction(TransactionId xid);
00020 
00021 extern Size SUBTRANSShmemSize(void);
00022 extern void SUBTRANSShmemInit(void);
00023 extern void BootStrapSUBTRANS(void);
00024 extern void StartupSUBTRANS(TransactionId oldestActiveXID);
00025 extern void ShutdownSUBTRANS(void);
00026 extern void CheckPointSUBTRANS(void);
00027 extern void ExtendSUBTRANS(TransactionId newestXact);
00028 extern void TruncateSUBTRANS(TransactionId oldestXact);
00029 
00030 #endif   /* SUBTRANS_H */
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subtrans.h
