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Filename : lmgr.h [ view ] [ edit ] [ rename ] [ download ] [ delete ]

/*-------------------------------------------------------------------------
 *
 * lmgr.h
 *	  POSTGRES lock manager definitions.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/storage/lmgr.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef LMGR_H
#define LMGR_H

#include "lib/stringinfo.h"
#include "storage/itemptr.h"
#include "storage/lock.h"
#include "utils/rel.h"

extern void RelationInitLockInfo(Relation relation);

/* Lock a relation */
extern void LockRelationOid(Oid relid, LOCKMODE lockmode);
extern bool ConditionalLockRelationOid(Oid relid, LOCKMODE lockmode);
extern void UnlockRelationId(LockRelId *relid, LOCKMODE lockmode);
extern void UnlockRelationOid(Oid relid, LOCKMODE lockmode);

extern void LockRelation(Relation relation, LOCKMODE lockmode);
extern bool ConditionalLockRelation(Relation relation, LOCKMODE lockmode);
extern void UnlockRelation(Relation relation, LOCKMODE lockmode);
extern bool LockHasWaitersRelation(Relation relation, LOCKMODE lockmode);

extern void LockRelationIdForSession(LockRelId *relid, LOCKMODE lockmode);
extern void UnlockRelationIdForSession(LockRelId *relid, LOCKMODE lockmode);

/* Lock a relation for extension */
extern void LockRelationForExtension(Relation relation, LOCKMODE lockmode);
extern void UnlockRelationForExtension(Relation relation, LOCKMODE lockmode);

/* Lock a page (currently only used within indexes) */
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 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,
				   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);

extern void LockSharedObjectForSession(Oid classid, Oid objid, uint16 objsubid,
						   LOCKMODE lockmode);
extern void UnlockSharedObjectForSession(Oid classid, Oid objid, uint16 objsubid,
							 LOCKMODE lockmode);

/* Describe a locktag for error messages */
extern void DescribeLockTag(StringInfo buf, const LOCKTAG *tag);

#endif   /* LMGR_H */

Edit Your File

Name	Filetype	Perm	Option
.	dir	drwxr-xr-x	newfile \| newfolder
..	dir	drwxr-xr-x	newfile \| newfolder
backendid.h	file	-rw-r--r--	edit \| rename \| delete \| download
barrier.h	file	-rw-r--r--	edit \| rename \| delete \| download
block.h	file	-rw-r--r--	edit \| rename \| delete \| download
buf.h	file	-rw-r--r--	edit \| rename \| delete \| download
buf_internals.h	file	-rw-r--r--	edit \| rename \| delete \| download
buffile.h	file	-rw-r--r--	edit \| rename \| delete \| download
bufmgr.h	file	-rw-r--r--	edit \| rename \| delete \| download
bufpage.h	file	-rw-r--r--	edit \| rename \| delete \| download
copydir.h	file	-rw-r--r--	edit \| rename \| delete \| download
fd.h	file	-rw-r--r--	edit \| rename \| delete \| download
freespace.h	file	-rw-r--r--	edit \| rename \| delete \| download
fsm_internals.h	file	-rw-r--r--	edit \| rename \| delete \| download
indexfsm.h	file	-rw-r--r--	edit \| rename \| delete \| download
ipc.h	file	-rw-r--r--	edit \| rename \| delete \| download
item.h	file	-rw-r--r--	edit \| rename \| delete \| download
itemid.h	file	-rw-r--r--	edit \| rename \| delete \| download
itemptr.h	file	-rw-r--r--	edit \| rename \| delete \| download
large_object.h	file	-rw-r--r--	edit \| rename \| delete \| download
latch.h	file	-rw-r--r--	edit \| rename \| delete \| download
lmgr.h	file	-rw-r--r--	edit \| rename \| delete \| download
lock.h	file	-rw-r--r--	edit \| rename \| delete \| download
lwlock.h	file	-rw-r--r--	edit \| rename \| delete \| download
off.h	file	-rw-r--r--	edit \| rename \| delete \| download
pg_sema.h	file	-rw-r--r--	edit \| rename \| delete \| download
pg_shmem.h	file	-rw-r--r--	edit \| rename \| delete \| download
pmsignal.h	file	-rw-r--r--	edit \| rename \| delete \| download
pos.h	file	-rw-r--r--	edit \| rename \| delete \| download
predicate.h	file	-rw-r--r--	edit \| rename \| delete \| download
predicate_internals.h	file	-rw-r--r--	edit \| rename \| delete \| download
proc.h	file	-rw-r--r--	edit \| rename \| delete \| download
procarray.h	file	-rw-r--r--	edit \| rename \| delete \| download
procsignal.h	file	-rw-r--r--	edit \| rename \| delete \| download
reinit.h	file	-rw-r--r--	edit \| rename \| delete \| download
relfilenode.h	file	-rw-r--r--	edit \| rename \| delete \| download
s_lock.h	file	-rw-r--r--	edit \| rename \| delete \| download
shmem.h	file	-rw-r--r--	edit \| rename \| delete \| download
sinval.h	file	-rw-r--r--	edit \| rename \| delete \| download
sinvaladt.h	file	-rw-r--r--	edit \| rename \| delete \| download
smgr.h	file	-rw-r--r--	edit \| rename \| delete \| download
spin.h	file	-rw-r--r--	edit \| rename \| delete \| download
standby.h	file	-rw-r--r--	edit \| rename \| delete \| download

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