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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-01 20:31:16 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2005-08-01 20:31:16 +0000 |
| commit | 2a4fad1a0e43d6375ffa8eddb2d8dfa1ed36593f (patch) | |
| tree | bb2bc2208507b0ab2403850e8dd01003a4ed73e9 /src/include/storage/lmgr.h | |
| parent | ca7abcd89dbeecb82cde50fccf4f6c483244fdf7 (diff) | |
| download | postgresql-2a4fad1a0e43d6375ffa8eddb2d8dfa1ed36593f.tar.gz postgresql-2a4fad1a0e43d6375ffa8eddb2d8dfa1ed36593f.zip | |
Add NOWAIT option to SELECT FOR UPDATE/SHARE.
Original patch by Hans-Juergen Schoenig, revisions by Karel Zak
and Tom Lane.
Diffstat (limited to 'src/include/storage/lmgr.h')
| -rw-r--r-- | src/include/storage/lmgr.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/include/storage/lmgr.h b/src/include/storage/lmgr.h index 3a83c26c7df..72504ee2ab5 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 1.50 2005/06/17 22:32:50 tgl Exp $ + * $PostgreSQL: pgsql/src/include/storage/lmgr.h,v 1.51 2005/08/01 20:31:16 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -64,12 +64,15 @@ 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 bool ConditionalLockTuple(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); +extern bool ConditionalXactLockTableWait(TransactionId xid); /* Lock a general object (other than a relation) of the current database */ extern void LockDatabaseObject(Oid classid, Oid objid, uint16 objsubid, |