/Users/deen/code/yugabyte-db/src/postgres/src/include/storage/predicate.h
Line | Count | Source |
1 | | /*------------------------------------------------------------------------- |
2 | | * |
3 | | * predicate.h |
4 | | * POSTGRES public predicate locking definitions. |
5 | | * |
6 | | * |
7 | | * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group |
8 | | * Portions Copyright (c) 1994, Regents of the University of California |
9 | | * |
10 | | * src/include/storage/predicate.h |
11 | | * |
12 | | *------------------------------------------------------------------------- |
13 | | */ |
14 | | #ifndef PREDICATE_H |
15 | | #define PREDICATE_H |
16 | | |
17 | | #include "storage/lock.h" |
18 | | #include "utils/relcache.h" |
19 | | #include "utils/snapshot.h" |
20 | | |
21 | | |
22 | | /* |
23 | | * GUC variables |
24 | | */ |
25 | | extern int max_predicate_locks_per_xact; |
26 | | extern int max_predicate_locks_per_relation; |
27 | | extern int max_predicate_locks_per_page; |
28 | | |
29 | | |
30 | | /* Number of SLRU buffers to use for predicate locking */ |
31 | 7.22k | #define NUM_OLDSERXID_BUFFERS 16 |
32 | | |
33 | | |
34 | | /* |
35 | | * function prototypes |
36 | | */ |
37 | | |
38 | | /* housekeeping for shared memory predicate lock structures */ |
39 | | extern void InitPredicateLocks(void); |
40 | | extern Size PredicateLockShmemSize(void); |
41 | | |
42 | | extern void CheckPointPredicate(void); |
43 | | |
44 | | /* predicate lock reporting */ |
45 | | extern bool PageIsPredicateLocked(Relation relation, BlockNumber blkno); |
46 | | |
47 | | /* predicate lock maintenance */ |
48 | | extern Snapshot GetSerializableTransactionSnapshot(Snapshot snapshot); |
49 | | extern void SetSerializableTransactionSnapshot(Snapshot snapshot, |
50 | | VirtualTransactionId *sourcevxid, |
51 | | int sourcepid); |
52 | | extern void RegisterPredicateLockingXid(TransactionId xid); |
53 | | extern void PredicateLockRelation(Relation relation, Snapshot snapshot); |
54 | | extern void PredicateLockPage(Relation relation, BlockNumber blkno, Snapshot snapshot); |
55 | | extern void PredicateLockTuple(Relation relation, HeapTuple tuple, Snapshot snapshot); |
56 | | extern void PredicateLockPageSplit(Relation relation, BlockNumber oldblkno, BlockNumber newblkno); |
57 | | extern void PredicateLockPageCombine(Relation relation, BlockNumber oldblkno, BlockNumber newblkno); |
58 | | extern void TransferPredicateLocksToHeapRelation(Relation relation); |
59 | | extern void ReleasePredicateLocks(bool isCommit); |
60 | | |
61 | | /* conflict detection (may also trigger rollback) */ |
62 | | extern void CheckForSerializableConflictOut(bool valid, Relation relation, HeapTuple tuple, |
63 | | Buffer buffer, Snapshot snapshot); |
64 | | extern void CheckForSerializableConflictIn(Relation relation, HeapTuple tuple, Buffer buffer); |
65 | | extern void CheckTableForSerializableConflictIn(Relation relation); |
66 | | |
67 | | /* final rollback checking */ |
68 | | extern void PreCommit_CheckForSerializationFailure(void); |
69 | | |
70 | | /* two-phase commit support */ |
71 | | extern void AtPrepare_PredicateLocks(void); |
72 | | extern void PostPrepare_PredicateLocks(TransactionId xid); |
73 | | extern void PredicateLockTwoPhaseFinish(TransactionId xid, bool isCommit); |
74 | | extern void predicatelock_twophase_recover(TransactionId xid, uint16 info, |
75 | | void *recdata, uint32 len); |
76 | | |
77 | | #endif /* PREDICATE_H */ |