diff options
Diffstat (limited to 'src/include/storage/lmgr.h')
| -rw-r--r-- | src/include/storage/lmgr.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/src/include/storage/lmgr.h b/src/include/storage/lmgr.h index 4d1027c174e..e9838807069 100644 --- a/src/include/storage/lmgr.h +++ b/src/include/storage/lmgr.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/lmgr.h,v 1.47 2005/04/29 22:28:24 tgl Exp $ + * $PostgreSQL: pgsql/src/include/storage/lmgr.h,v 1.48 2005/04/30 19:03:33 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -17,6 +17,7 @@ #include "storage/lock.h" #include "utils/rel.h" + /* These are the valid values of type LOCKMODE: */ /* NoLock is not a lock mode, but a flag value meaning "don't get a lock" */ @@ -60,9 +61,25 @@ extern void LockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode); extern bool ConditionalLockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode); extern void UnlockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode); +/* Lock a tuple (see heap_lock_tuple before assuming you understand this) */ +extern void LockTuple(Relation relation, ItemPointer tid, LOCKMODE lockmode); +extern void UnlockTuple(Relation relation, ItemPointer tid, LOCKMODE lockmode); + /* Lock an XID (used to wait for a transaction to finish) */ extern void XactLockTableInsert(TransactionId xid); extern void XactLockTableDelete(TransactionId xid); extern void XactLockTableWait(TransactionId xid); +/* Lock a general object (other than a relation) of the current database */ +extern void LockDatabaseObject(Oid classid, Oid objid, uint16 objsubid, + LOCKMODE lockmode); +extern void UnlockDatabaseObject(Oid classid, Oid objid, uint16 objsubid, + LOCKMODE lockmode); + +/* Lock a shared-across-databases object (other than a relation) */ +extern void LockSharedObject(Oid classid, Oid objid, uint16 objsubid, + LOCKMODE lockmode); +extern void UnlockSharedObject(Oid classid, Oid objid, uint16 objsubid, + LOCKMODE lockmode); + #endif /* LMGR_H */ |