database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-29 22:49:41 +03:00
Code Activity

Add built-in userlock manipulation functions to replace the former

Browse Source 
contrib functionality.  Along the way, remove the USER_LOCKS configuration
symbol, since it no longer makes any sense to try to compile that out.
No user documentation yet ... mmoncure has promised to write some.
Thanks to Abhijit Menon-Sen for creating a first draft to work from.
This commit is contained in:
Tom Lane
2006-09-18 22:40:40 +00:00
parent f7f308d6a6
commit 9b4cda0df6
11 changed files with 336 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/include/storage/lock.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/lock.h,v 1.98 2006/08/27 19:14:34 tgl Exp $
* $PostgreSQL: pgsql/src/include/storage/lock.h,v 1.99 2006/09/18 22:40:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -146,8 +146,7 @@ typedef enum LockTagType
* pg_description, but notice that we are constraining SUBID to 16 bits.
* Also, we use DB OID = 0 for shared objects such as tablespaces.
*/
LOCKTAG_USERLOCK /* reserved for contrib/userlock */
/* ID info for a userlock is defined by user_locks.c */
LOCKTAG_USERLOCK /* advisory "user" locks */
} LockTagType;
/*
@@ -221,6 +220,14 @@ typedef struct LOCKTAG
(locktag).locktag_type = LOCKTAG_OBJECT, \
(locktag).locktag_lockmethodid = DEFAULT_LOCKMETHOD)
#define SET_LOCKTAG_USERLOCK(locktag,id1,id2,id3,id4) \
((locktag).locktag_field1 = (id1), \
(locktag).locktag_field2 = (id2), \
(locktag).locktag_field3 = (id3), \
(locktag).locktag_field4 = (id4), \
(locktag).locktag_type = LOCKTAG_USERLOCK, \
(locktag).locktag_lockmethodid = USER_LOCKMETHOD)
/*
* Per-locked-object lock information:
@@ -362,8 +369,8 @@ typedef struct LOCALLOCK
/*
* This struct holds information passed from lmgr internals to the lock
* listing user-level functions (lockfuncs.c). For each PROCLOCK in the
* system, copies of the PROCLOCK object and associated PGPROC and
* listing user-level functions (in lockfuncs.c). For each PROCLOCK in
* the system, copies of the PROCLOCK object and associated PGPROC and
* LOCK objects are stored. Note there will often be multiple copies
* of the same PGPROC or LOCK --- to detect whether two are the same,
* compare the PROCLOCK tag fields.