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postgres/src/include/storage/lmgr.h

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More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
/*-------------------------------------------------------------------------
*
Change my-function-name-- to my_function_name, and optimizer renames.
1999-02-13 23:22:53 +00:00
* lmgr.h
Massive commit to run PGINDENT on all *.c and *.h files.
1997-09-07 05:04:48 +00:00
* POSTGRES lock manager definitions.
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
*
*
Add: * Portions Copyright (c) 1996-2000, PostgreSQL, Inc to all files copyright Regents of Berkeley. Man, that's a lot of files.
2000-01-26 05:58:53 +00:00
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
*
Significant cleanups in SysV IPC handling (shared mem and semaphores). IPC key assignment will now work correctly even when multiple postmasters are using same logical port number (which is possible given -k switch). There is only one shared-mem segment per postmaster now, not 3. Rip out broken code for non-TAS case in bufmgr and xlog, substitute a complete S_LOCK emulation using semaphores in spin.c. TAS and non-TAS logic is now exactly the same. When deadlock is detected, "Deadlock detected" is now the elog(ERROR) message, rather than a NOTICE that comes out before an unhelpful ERROR.
2000-11-28 23:27:57 +00:00
* $Id: lmgr.h,v 1.26 2000/11/28 23:27:57 tgl Exp $
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
*
*-------------------------------------------------------------------------
*/
Massive commit to run PGINDENT on all *.c and *.h files.
1997-09-07 05:04:48 +00:00
#ifndef LMGR_H
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
#define LMGR_H
Change #include's to use <> and "" as appropriate.
1999-07-15 23:04:24 +00:00
#include "storage/lock.h"
#include "utils/rel.h"
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
Mega-commit to make heap_open/heap_openr/heap_close take an additional argument specifying the kind of lock to acquire/release (or 'NoLock' to do no lock processing). Ensure that all relations are locked with some appropriate lock level before being examined --- this ensures that relevant shared-inval messages have been processed and should prevent problems caused by concurrent VACUUM. Fix several bugs having to do with mismatched increment/decrement of relation ref count and mismatched heap_open/close (which amounts to the same thing). A bogus ref count on a relation doesn't matter much *unless* a SI Inval message happens to arrive at the wrong time, which is probably why we got away with this sloppiness for so long. Repair missing grab of AccessExclusiveLock in DROP TABLE, ALTER/RENAME TABLE, etc, as noted by Hiroshi. Recommend 'make clean all' after pulling this update; I modified the Relation struct layout slightly. Will post further discussion to pghackers list shortly.
1999-09-18 19:08:25 +00:00
/* These are the valid values of type LOCKMODE: */
/* NoLock is not a lock mode, but a flag value meaning "don't get a lock" */
#define NoLock 0
Initial MVCC code. New code for locking buffer' context.
1998-12-15 12:47:01 +00:00
#define AccessShareLock 1 /* SELECT */
#define RowShareLock 2 /* SELECT FOR UPDATE */
#define RowExclusiveLock 3 /* INSERT, UPDATE, DELETE */
#define ShareLock 4
#define ShareRowExclusiveLock 5
#define ExclusiveLock 6
#define AccessExclusiveLock 7
extern LOCKMETHOD LockTableId;
extern LOCKMETHOD InitLockTable(void);
Another PGINDENT run that changes variable indenting and case label indenting. Also static variable indenting.
1997-09-08 02:41:22 +00:00
extern void RelationInitLockInfo(Relation relation);
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
Initial MVCC code. New code for locking buffer' context.
1998-12-15 12:47:01 +00:00
extern void LockRelation(Relation relation, LOCKMODE lockmode);
extern void UnlockRelation(Relation relation, LOCKMODE lockmode);
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
Initial MVCC code. New code for locking buffer' context.
1998-12-15 12:47:01 +00:00
/* this is for indices */
extern void LockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode);
extern void UnlockPage(Relation relation, BlockNumber blkno, LOCKMODE lockmode);
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
Initial MVCC code. New code for locking buffer' context.
1998-12-15 12:47:01 +00:00
/* and this is for transactions */
extern void XactLockTableInsert(TransactionId xid);
extern void XactLockTableWait(TransactionId xid);
More cleanups of the include files - centralizing to simplify the -I's required to compile
1996-08-28 01:59:28 +00:00
OK, folks, here is the pgindent output.
1998-09-01 04:40:42 +00:00
#endif /* LMGR_H */
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