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Fix pg_locks view to call advisory locks advisory locks, while preserving
backward compatibility for anyone using the old userlock code that's now on pgfoundry --- locks from that code still show as 'userlock'.
This commit is contained in:
Tom Lane
parent
beca984e5f
commit
d40d34863e
@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.133 2006/09/18 22:40:36 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.134 2006/09/22 23:20:13 tgl Exp $ -->
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<!--
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Documentation of the system catalogs, directed toward PostgreSQL developers
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-->
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@ -4890,8 +4890,9 @@
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<literal>page</>,
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<literal>tuple</>,
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<literal>transactionid</>,
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<literal>object</>, or
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<literal>userlock</>
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<literal>object</>,
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<literal>userlock</>, or
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<literal>advisory</>
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</entry>
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</row>
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<row>
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@ -5029,14 +5030,15 @@
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</para>
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<para>
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User-defined locks can be acquired on keys consisting of either a single
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Advisory locks can be acquired on keys consisting of either a single
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bigint value or two integer values. A bigint key is displayed with its
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high-order half in the <structfield>classid</> column, its low-order half
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in the <structfield>objid</> column, and <structfield>objsubid</> equal
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to 1. Integer keys are displayed with the first key in the
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<structfield>classid</> column, the second key in the <structfield>objid</>
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column, and <structfield>objsubid</> equal to 2. The actual meaning of
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the keys is up to the user.
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the keys is up to the user. Advisory locks are local to each database,
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so the <structfield>database</> column is meaningful for an advisory lock.
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</para>
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<para>
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@ -12,7 +12,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/storage/lmgr/deadlock.c,v 1.42 2006/09/18 22:40:36 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/storage/lmgr/deadlock.c,v 1.43 2006/09/22 23:20:13 tgl Exp $
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*
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* Interface:
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*
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@ -872,8 +872,16 @@ DescribeLockTag(StringInfo buf, const LOCKTAG *lock)
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lock->locktag_field1);
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break;
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case LOCKTAG_USERLOCK:
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/* reserved for old contrib code, now on pgfoundry */
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appendStringInfo(buf,
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_("user lock [%u,%u,%u,%u]"),
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_("user lock [%u,%u,%u]"),
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lock->locktag_field1,
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lock->locktag_field2,
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lock->locktag_field3);
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break;
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case LOCKTAG_ADVISORY:
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appendStringInfo(buf,
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_("advisory lock [%u,%u,%u,%u]"),
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lock->locktag_field1,
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lock->locktag_field2,
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lock->locktag_field3,
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@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/storage/lmgr/lmgr.c,v 1.87 2006/08/18 16:09:09 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/storage/lmgr/lmgr.c,v 1.88 2006/09/22 23:20:13 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -629,6 +629,7 @@ LockTagIsTemp(const LOCKTAG *tag)
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/* there are currently no non-table temp objects */
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break;
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case LOCKTAG_USERLOCK:
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case LOCKTAG_ADVISORY:
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/* assume these aren't temp */
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break;
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}
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@ -6,7 +6,7 @@
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* Copyright (c) 2002-2006, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/lockfuncs.c,v 1.25 2006/09/18 22:40:37 tgl Exp $
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* $PostgreSQL: pgsql/src/backend/utils/adt/lockfuncs.c,v 1.26 2006/09/22 23:20:14 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -28,7 +28,8 @@ static const char *const LockTagTypeNames[] = {
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"tuple",
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"transactionid",
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"object",
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"userlock"
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"userlock",
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"advisory"
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};
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/* Working status for pg_lock_status */
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@ -181,7 +182,7 @@ pg_lock_status(PG_FUNCTION_ARGS)
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MemSet(values, 0, sizeof(values));
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MemSet(nulls, ' ', sizeof(nulls));
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if (lock->tag.locktag_type <= LOCKTAG_USERLOCK)
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if (lock->tag.locktag_type <= LOCKTAG_ADVISORY)
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locktypename = LockTagTypeNames[lock->tag.locktag_type];
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else
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{
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@ -238,6 +239,7 @@ pg_lock_status(PG_FUNCTION_ARGS)
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break;
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case LOCKTAG_OBJECT:
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case LOCKTAG_USERLOCK:
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case LOCKTAG_ADVISORY:
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default: /* treat unknown locktags like OBJECT */
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values[1] = ObjectIdGetDatum(lock->tag.locktag_field1);
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values[6] = ObjectIdGetDatum(lock->tag.locktag_field2);
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@ -270,7 +272,7 @@ pg_lock_status(PG_FUNCTION_ARGS)
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/*
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* Functions for manipulating USERLOCK locks
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* Functions for manipulating advisory locks
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*
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* We make use of the locktag fields as follows:
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*
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@ -280,13 +282,13 @@ pg_lock_status(PG_FUNCTION_ARGS)
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* field4: 1 if using an int8 key, 2 if using 2 int4 keys
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*/
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#define SET_LOCKTAG_INT64(tag, key64) \
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SET_LOCKTAG_USERLOCK(tag, \
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SET_LOCKTAG_ADVISORY(tag, \
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MyDatabaseId, \
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(uint32) ((key64) >> 32), \
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(uint32) (key64), \
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1)
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#define SET_LOCKTAG_INT32(tag, key1, key2) \
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SET_LOCKTAG_USERLOCK(tag, MyDatabaseId, key1, key2, 2)
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SET_LOCKTAG_ADVISORY(tag, MyDatabaseId, key1, key2, 2)
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/*
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* pg_advisory_lock(int8) - acquire exclusive lock on an int8 key
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@ -511,7 +513,7 @@ pg_advisory_unlock_shared_int4(PG_FUNCTION_ARGS)
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}
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/*
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* pg_advisory_unlock_all() - release all userlocks
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* pg_advisory_unlock_all() - release all advisory locks
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*/
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Datum
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pg_advisory_unlock_all(PG_FUNCTION_ARGS)
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@ -7,7 +7,7 @@
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* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/storage/lock.h,v 1.99 2006/09/18 22:40:40 tgl Exp $
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* $PostgreSQL: pgsql/src/include/storage/lock.h,v 1.100 2006/09/22 23:20:14 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -146,7 +146,8 @@ typedef enum LockTagType
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* pg_description, but notice that we are constraining SUBID to 16 bits.
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* Also, we use DB OID = 0 for shared objects such as tablespaces.
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*/
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LOCKTAG_USERLOCK /* advisory "user" locks */
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LOCKTAG_USERLOCK, /* reserved for old contrib/userlock code */
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LOCKTAG_ADVISORY /* advisory user locks */
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} LockTagType;
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/*
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@ -220,12 +221,12 @@ typedef struct LOCKTAG
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(locktag).locktag_type = LOCKTAG_OBJECT, \
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(locktag).locktag_lockmethodid = DEFAULT_LOCKMETHOD)
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#define SET_LOCKTAG_USERLOCK(locktag,id1,id2,id3,id4) \
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#define SET_LOCKTAG_ADVISORY(locktag,id1,id2,id3,id4) \
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((locktag).locktag_field1 = (id1), \
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(locktag).locktag_field2 = (id2), \
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(locktag).locktag_field3 = (id3), \
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(locktag).locktag_field4 = (id4), \
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(locktag).locktag_type = LOCKTAG_USERLOCK, \
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(locktag).locktag_type = LOCKTAG_ADVISORY, \
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(locktag).locktag_lockmethodid = USER_LOCKMETHOD)
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