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* Merge LockMethodCtl and LockMethodTable into one shared structure (Bruce)
This commit is contained in:
Bruce Momjian
2002-07-18 23:06:20 +00:00
parent 85d2a629c6
commit 981d045e88
4 changed files with 47 additions and 78 deletions
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34
src/include/storage/lock.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: lock.h,v 1.61 2002/06/20 20:29:52 momjian Exp $
* $Id: lock.h,v 1.62 2002/07/18 23:06:20 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -62,17 +62,14 @@ typedef int LOCKMETHOD;
* There is normally only one lock method, the default one.
* If user locks are enabled, an additional lock method is present.
*
* LOCKMETHODCTL and LOCKMETHODTABLE are split because the first lives
* in shared memory. (There isn't any really good reason for the split.)
* LOCKMETHODTABLE exists in private memory. Both are created by the
* postmaster and should be the same in all backends.
*/
/*
* This is the control structure for a lock table. It
* lives in shared memory. This information is the same
* for all backends.
*
* lockHash -- hash table holding per-locked-object lock information
*
* holderHash -- hash table holding per-lock-holder lock information
*
* lockmethod -- the handle used by the lock table's clients to
* refer to the type of lock table being used.
*
@@ -88,28 +85,17 @@ typedef int LOCKMETHOD;
* starvation). XXX this field is not actually used at present!
*
* masterLock -- synchronizes access to the table
*/
typedef struct LOCKMETHODCTL
{
LOCKMETHOD lockmethod;
int numLockModes;
int conflictTab[MAX_LOCKMODES];
int prio[MAX_LOCKMODES];
LWLockId masterLock;
} LOCKMETHODCTL;
/*
* Eack backend has a non-shared lock table header.
*
* lockHash -- hash table holding per-locked-object lock information
* holderHash -- hash table holding per-lock-holder lock information
* ctl - shared control structure described above.
*/
typedef struct LOCKMETHODTABLE
{
HTAB *lockHash;
HTAB *holderHash;
LOCKMETHODCTL *ctl;
LOCKMETHOD lockmethod;
int numLockModes;
int conflictTab[MAX_LOCKMODES];
int prio[MAX_LOCKMODES];
LWLockId masterLock;
} LOCKMETHODTABLE;