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postgresql/contrib/userlock/user_locks.h

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Update of contrib stuff from massimo.
1997-11-06 05:38:25 +08:00
#ifndef USER_LOCKS_H
#define USER_LOCKS_H
Restructure LOCKTAG as per discussions of a couple months ago. Essentially, we shoehorn in a lockable-object-type field by taking a byte away from the lockmethodid, which can surely fit in one byte instead of two. This allows less artificial definitions of all the other fields of LOCKTAG; we can get rid of the special pg_xactlock pseudo-relation, and also support locks on individual tuples and general database objects (including shared objects). None of those possibilities are actually exploited just yet, however. I removed pg_xactlock from pg_class, but did not force initdb for that change. At this point, relkind 's' (SPECIAL) is unused and could be removed entirely.
2005-04-30 06:28:24 +08:00
extern int user_lock(uint32 id1, uint32 id2, LOCKMODE lockmode);
extern int user_unlock(uint32 id1, uint32 id2, LOCKMODE lockmode);
extern int user_write_lock(uint32 id1, uint32 id2);
extern int user_write_unlock(uint32 id1, uint32 id2);
extern int user_write_lock_oid(Oid oid);
extern int user_write_unlock_oid(Oid oid);
extern int user_unlock_all(void);
From: Massimo Dal Zotto <dz@cs.unitn.it> Here is a tar file the new directories, which substitute the old ones in contrib. Please remove the old directories array, datetime, miscutil, string and userlock before unpacking the tar file in contrib. Note that as the modules are now installed in lib/modules I install all my sql code in lib/sql. In my opinion also the other contributors should follow these rules.
1998-08-31 03:37:51 +08:00
Restructure LOCKTAG as per discussions of a couple months ago. Essentially, we shoehorn in a lockable-object-type field by taking a byte away from the lockmethodid, which can surely fit in one byte instead of two. This allows less artificial definitions of all the other fields of LOCKTAG; we can get rid of the special pg_xactlock pseudo-relation, and also support locks on individual tuples and general database objects (including shared objects). None of those possibilities are actually exploited just yet, however. I removed pg_xactlock from pg_class, but did not force initdb for that change. At this point, relkind 's' (SPECIAL) is unused and could be removed entirely.
2005-04-30 06:28:24 +08:00
#endif
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