Re: Minor lmgr code cleanup

Manfred, can I get a description for this patch? Thanks.

---------------------------------------------------------------------------

Manfred Koizar wrote:
> On Mon, 8 Sep 2003 00:51:45 -0400 (EDT), Bruce Momjian
> <pgman(at)candle(dot)pha(dot)pa(dot)us> wrote:
> >
> >This has been saved for the 7.5 release:
> >
> > http:/momjian.postgresql.org/cgi-bin/pgpatches2
>
> Here is the combined patch. Prior patches in this thread are hereby
> obsolete.
>
> Servus
> Manfred

> diff -ruN ../base/src/backend/storage/ipc/ipci.c src/backend/storage/ipc/ipci.c
> --- ../base/src/backend/storage/ipc/ipci.c 2003-08-04 04:40:03.000000000 +0200
> +++ src/backend/storage/ipc/ipci.c 2003-09-06 16:53:54.000000000 +0200
> @@ -111,8 +111,7 @@
> * Set up lock manager
> */
> InitLocks();
> - if (InitLockTable(maxBackends) == INVALID_TABLEID)
> - elog(FATAL, "could not create the lock table");
> + InitLockTable(maxBackends);
>
> /*
> * Set up process table
> diff -ruN ../base/src/backend/storage/lmgr/deadlock.c src/backend/storage/lmgr/deadlock.c
> --- ../base/src/backend/storage/lmgr/deadlock.c 2003-08-08 23:42:00.000000000 +0200
> +++ src/backend/storage/lmgr/deadlock.c 2003-09-06 22:25:46.000000000 +0200
> @@ -428,7 +428,7 @@
> LOCK *lock;
> PROCLOCK *proclock;
> SHM_QUEUE *lockHolders;
> - LOCKMETHODTABLE *lockMethodTable;
> + LockMethod lockMethodTable;
> PROC_QUEUE *waitQueue;
> int queue_size;
> int conflictMask;
> diff -ruN ../base/src/backend/storage/lmgr/lmgr.c src/backend/storage/lmgr/lmgr.c
> --- ../base/src/backend/storage/lmgr/lmgr.c 2003-08-18 00:41:12.000000000 +0200
> +++ src/backend/storage/lmgr/lmgr.c 2003-09-06 18:10:48.000000000 +0200
> @@ -65,26 +65,24 @@
>
> };
>
> -LOCKMETHOD LockTableId = (LOCKMETHOD) NULL;
> -LOCKMETHOD LongTermTableId = (LOCKMETHOD) NULL;
> +static LOCKMETHODID LockTableId = INVALID_LOCKMETHOD;
>
> /*
> * Create the lock table described by LockConflicts
> */
> -LOCKMETHOD
> +void
> InitLockTable(int maxBackends)
> {
> - int lockmethod;
> + LOCKMETHODID LongTermTableId;
>
> /* number of lock modes is lengthof()-1 because of dummy zero */
> - lockmethod = LockMethodTableInit("LockTable",
> - LockConflicts,
> - lengthof(LockConflicts) - 1,
> - maxBackends);
> - LockTableId = lockmethod;
> -
> - if (!(LockTableId))
> + LockTableId = LockMethodTableInit("LockTable",
> + LockConflicts,
> + lengthof(LockConflicts) - 1,
> + maxBackends);
> + if (!LockMethodIsValid(LockTableId))
> elog(ERROR, "could not initialize lock table");
> + Assert(LockTableId == DEFAULT_LOCKMETHOD);
>
> #ifdef USER_LOCKS
>
> @@ -92,11 +90,10 @@
> * Allocate another tableId for long-term locks
> */
> LongTermTableId = LockMethodTableRename(LockTableId);
> - if (!(LongTermTableId))
> + if (!LockMethodIsValid(LongTermTableId))
> elog(ERROR, "could not rename long-term lock table");
> + Assert(LongTermTableId == USER_LOCKMETHOD);
> #endif
> -
> - return LockTableId;
> }
>
> /*
> diff -ruN ../base/src/backend/storage/lmgr/lock.c src/backend/storage/lmgr/lock.c
> --- ../base/src/backend/storage/lmgr/lock.c 2003-08-18 00:41:12.000000000 +0200
> +++ src/backend/storage/lmgr/lock.c 2003-09-07 07:53:16.000000000 +0200
> @@ -46,7 +46,7 @@
> #define NLOCKENTS(maxBackends) (max_locks_per_xact * (maxBackends))
>
>
> -static int WaitOnLock(LOCKMETHOD lockmethod, LOCKMODE lockmode,
> +static int WaitOnLock(LOCKMETHODID lockmethodid, LOCKMODE lockmode,
> LOCK *lock, PROCLOCK *proclock);
> static void LockCountMyLocks(SHMEM_OFFSET lockOffset, PGPROC *proc,
> int *myHolding);
> @@ -111,7 +111,7 @@
> "req(%d,%d,%d,%d,%d,%d,%d)=%d "
> "grant(%d,%d,%d,%d,%d,%d,%d)=%d wait(%d) type(%s)",
> where, MAKE_OFFSET(lock),
> - lock->tag.lockmethod, lock->tag.relId, lock->tag.dbId,
> + lock->tag.lockmethodid, lock->tag.relId, lock->tag.dbId,
> lock->tag.objId.blkno, lock->grantMask,
> lock->requested[1], lock->requested[2], lock->requested[3],
> lock->requested[4], lock->requested[5], lock->requested[6],
> @@ -150,19 +150,9 @@
>
>
> /*
> - * These are to simplify/speed up some bit arithmetic.
> - *
> - * XXX is a fetch from a static array really faster than a shift?
> - * Wouldn't bet on it...
> + * map from lock method id to the lock table structure
> */
> -
> -static LOCKMASK BITS_OFF[MAX_LOCKMODES];
> -static LOCKMASK BITS_ON[MAX_LOCKMODES];
> -
> -/*
> - * map from lockmethod to the lock table structure
> - */
> -static LOCKMETHODTABLE *LockMethodTable[MAX_LOCK_METHODS];
> +static LockMethod LockMethods[MAX_LOCK_METHODS];
>
> static int NumLockMethods;
>
> @@ -173,28 +163,20 @@
> void
> InitLocks(void)
> {
> - int i;
> - int bit;
> -
> - bit = 1;
> - for (i = 0; i < MAX_LOCKMODES; i++, bit <<= 1)
> - {
> - BITS_ON[i] = bit;
> - BITS_OFF[i] = ~bit;
> - }
> + /* NOP */
> }
>
>
> /*
> * Fetch the lock method table associated with a given lock
> */
> -LOCKMETHODTABLE *
> +LockMethod
> GetLocksMethodTable(LOCK *lock)
> {
> - LOCKMETHOD lockmethod = LOCK_LOCKMETHOD(*lock);
> + LOCKMETHODID lockmethodid = LOCK_LOCKMETHOD(*lock);
>
> - Assert(lockmethod > 0 && lockmethod < NumLockMethods);
> - return LockMethodTable[lockmethod];
> + Assert(0 < lockmethodid && lockmethodid < NumLockMethods);
> + return LockMethods[lockmethodid];
> }
>
>
> @@ -205,7 +187,7 @@
> * Notes: just copying. Should only be called once.
> */
> static void
> -LockMethodInit(LOCKMETHODTABLE *lockMethodTable,
> +LockMethodInit(LockMethod lockMethodTable,
> LOCKMASK *conflictsP,
> int numModes)
> {
> @@ -226,13 +208,13 @@
> * by the postmaster are inherited by each backend, so they must be in
> * TopMemoryContext.
> */
> -LOCKMETHOD
> +LOCKMETHODID
> LockMethodTableInit(char *tabName,
> LOCKMASK *conflictsP,
> int numModes,
> int maxBackends)
> {
> - LOCKMETHODTABLE *lockMethodTable;
> + LockMethod newLockMethod;
> char *shmemName;
> HASHCTL info;
> int hash_flags;
> @@ -254,10 +236,10 @@
>
> /* each lock table has a header in shared memory */
> sprintf(shmemName, "%s (lock method table)", tabName);
> - lockMethodTable = (LOCKMETHODTABLE *)
> - ShmemInitStruct(shmemName, sizeof(LOCKMETHODTABLE), &found);
> + newLockMethod = (LockMethod)
> + ShmemInitStruct(shmemName, sizeof(LockMethodData), &found);
>
> - if (!lockMethodTable)
> + if (!newLockMethod)
> elog(FATAL, "could not initialize lock table \"%s\"", tabName);
>
> /*
> @@ -275,15 +257,15 @@
> */
> if (!found)
> {
> - MemSet(lockMethodTable, 0, sizeof(LOCKMETHODTABLE));
> - lockMethodTable->masterLock = LockMgrLock;
> - lockMethodTable->lockmethod = NumLockMethods;
> + MemSet(newLockMethod, 0, sizeof(LockMethodData));
> + newLockMethod->masterLock = LockMgrLock;
> + newLockMethod->lockmethodid = NumLockMethods;
> }
>
> /*
> * other modules refer to the lock table by a lockmethod ID
> */
> - LockMethodTable[NumLockMethods] = lockMethodTable;
> + LockMethods[NumLockMethods] = newLockMethod;
> NumLockMethods++;
> Assert(NumLockMethods <= MAX_LOCK_METHODS);
>
> @@ -297,15 +279,15 @@
> hash_flags = (HASH_ELEM | HASH_FUNCTION);
>
> sprintf(shmemName, "%s (lock hash)", tabName);
> - lockMethodTable->lockHash = ShmemInitHash(shmemName,
> - init_table_size,
> - max_table_size,
> - &info,
> - hash_flags);
> + newLockMethod->lockHash = ShmemInitHash(shmemName,
> + init_table_size,
> + max_table_size,
> + &info,
> + hash_flags);
>
> - if (!lockMethodTable->lockHash)
> + if (!newLockMethod->lockHash)
> elog(FATAL, "could not initialize lock table \"%s\"", tabName);
> - Assert(lockMethodTable->lockHash->hash == tag_hash);
> + Assert(newLockMethod->lockHash->hash == tag_hash);
>
> /*
> * allocate a hash table for PROCLOCK structs. This is used to store
> @@ -317,23 +299,23 @@
> hash_flags = (HASH_ELEM | HASH_FUNCTION);
>
> sprintf(shmemName, "%s (proclock hash)", tabName);
> - lockMethodTable->proclockHash = ShmemInitHash(shmemName,
> - init_table_size,
> - max_table_size,
> - &info,
> - hash_flags);
> + newLockMethod->proclockHash = ShmemInitHash(shmemName,
> + init_table_size,
> + max_table_size,
> + &info,
> + hash_flags);
>
> - if (!lockMethodTable->proclockHash)
> + if (!newLockMethod->proclockHash)
> elog(FATAL, "could not initialize lock table \"%s\"", tabName);
>
> /* init data structures */
> - LockMethodInit(lockMethodTable, conflictsP, numModes);
> + LockMethodInit(newLockMethod, conflictsP, numModes);
>
> LWLockRelease(LockMgrLock);
>
> pfree(shmemName);
>
> - return lockMethodTable->lockmethod;
> + return newLockMethod->lockmethodid;
> }
>
> /*
> @@ -349,22 +331,22 @@
> * short term and long term locks, yet store them all in one hashtable.
> */
>
> -LOCKMETHOD
> -LockMethodTableRename(LOCKMETHOD lockmethod)
> +LOCKMETHODID
> +LockMethodTableRename(LOCKMETHODID lockmethodid)
> {
> - LOCKMETHOD newLockMethod;
> + LOCKMETHODID newLockMethodId;
>
> if (NumLockMethods >= MAX_LOCK_METHODS)
> return INVALID_LOCKMETHOD;
> - if (LockMethodTable[lockmethod] == INVALID_LOCKMETHOD)
> + if (LockMethods[lockmethodid] == INVALID_LOCKMETHOD)
> return INVALID_LOCKMETHOD;
>
> /* other modules refer to the lock table by a lockmethod ID */
> - newLockMethod = NumLockMethods;
> + newLockMethodId = NumLockMethods;
> NumLockMethods++;
>
> - LockMethodTable[newLockMethod] = LockMethodTable[lockmethod];
> - return newLockMethod;
> + LockMethods[newLockMethodId] = LockMethods[lockmethodid];
> + return newLockMethodId;
> }
>
> /*
> @@ -412,7 +394,7 @@
> *
> * normal lock user lock
> *
> - * lockmethod 1 2
> + * lockmethodid 1 2
> * tag.dbId database oid database oid
> * tag.relId rel oid or 0 0
> * tag.objId block id lock id2
> @@ -429,7 +411,7 @@
> */
>
> bool
> -LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
> +LockAcquire(LOCKMETHODID lockmethodid, LOCKTAG *locktag,
> TransactionId xid, LOCKMODE lockmode, bool dontWait)
> {
> PROCLOCK *proclock;
> @@ -438,25 +420,25 @@
> bool found;
> LOCK *lock;
> LWLockId masterLock;
> - LOCKMETHODTABLE *lockMethodTable;
> + LockMethod lockMethodTable;
> int status;
> int myHolding[MAX_LOCKMODES];
> int i;
>
> #ifdef LOCK_DEBUG
> - if (lockmethod == USER_LOCKMETHOD && Trace_userlocks)
> + if (lockmethodid == USER_LOCKMETHOD && Trace_userlocks)
> elog(LOG, "LockAcquire: user lock [%u] %s",
> locktag->objId.blkno, lock_mode_names[lockmode]);
> #endif
>
> /* ???????? This must be changed when short term locks will be used */
> - locktag->lockmethod = lockmethod;
> + locktag->lockmethodid = lockmethodid;
>
> - Assert(lockmethod < NumLockMethods);
> - lockMethodTable = LockMethodTable[lockmethod];
> + Assert(lockmethodid < NumLockMethods);
> + lockMethodTable = LockMethods[lockmethodid];
> if (!lockMethodTable)
> {
> - elog(WARNING, "bad lock table id: %d", lockmethod);
> + elog(WARNING, "bad lock table id: %d", lockmethodid);
> return FALSE;
> }
>
> @@ -666,15 +648,12 @@
> * Construct bitmask of locks this process holds on this object.
> */
> {
> - int heldLocks = 0;
> - int tmpMask;
> + LOCKMASK heldLocks = 0;
>
> - for (i = 1, tmpMask = 2;
> - i <= lockMethodTable->numLockModes;
> - i++, tmpMask <<= 1)
> + for (i = 1; i <= lockMethodTable->numLockModes; i++)
> {
> if (myHolding[i] > 0)
> - heldLocks |= tmpMask;
> + heldLocks |= LOCKBIT_ON(i);
> }
> MyProc->heldLocks = heldLocks;
> }
> @@ -682,7 +661,7 @@
> /*
> * Sleep till someone wakes me up.
> */
> - status = WaitOnLock(lockmethod, lockmode, lock, proclock);
> + status = WaitOnLock(lockmethodid, lockmode, lock, proclock);
>
> /*
> * NOTE: do not do any material change of state between here and
> @@ -729,7 +708,7 @@
> * known. If NULL is passed then these values will be computed internally.
> */
> int
> -LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
> +LockCheckConflicts(LockMethod lockMethodTable,
> LOCKMODE lockmode,
> LOCK *lock,
> PROCLOCK *proclock,
> @@ -737,9 +716,8 @@
> int *myHolding) /* myHolding[] array or NULL */
> {
> int numLockModes = lockMethodTable->numLockModes;
> - int bitmask;
> - int i,
> - tmpMask;
> + LOCKMASK bitmask;
> + int i;
> int localHolding[MAX_LOCKMODES];
>
> /*
> @@ -772,11 +750,10 @@
>
> /* Compute mask of lock types held by other processes */
> bitmask = 0;
> - tmpMask = 2;
> - for (i = 1; i <= numLockModes; i++, tmpMask <<= 1)
> + for (i = 1; i <= numLockModes; i++)
> {
> if (lock->granted[i] != myHolding[i])
> - bitmask |= tmpMask;
> + bitmask |= LOCKBIT_ON(i);
> }
>
> /*
> @@ -842,9 +819,9 @@
> {
> lock->nGranted++;
> lock->granted[lockmode]++;
> - lock->grantMask |= BITS_ON[lockmode];
> + lock->grantMask |= LOCKBIT_ON(lockmode);
> if (lock->granted[lockmode] == lock->requested[lockmode])
> - lock->waitMask &= BITS_OFF[lockmode];
> + lock->waitMask &= LOCKBIT_OFF(lockmode);
> LOCK_PRINT("GrantLock", lock, lockmode);
> Assert((lock->nGranted > 0) && (lock->granted[lockmode] > 0));
> Assert(lock->nGranted <= lock->nRequested);
> @@ -862,14 +839,14 @@
> * The locktable's masterLock must be held at entry.
> */
> static int
> -WaitOnLock(LOCKMETHOD lockmethod, LOCKMODE lockmode,
> +WaitOnLock(LOCKMETHODID lockmethodid, LOCKMODE lockmode,
> LOCK *lock, PROCLOCK *proclock)
> {
> - LOCKMETHODTABLE *lockMethodTable = LockMethodTable[lockmethod];
> + LockMethod lockMethodTable = LockMethods[lockmethodid];
> char *new_status,
> *old_status;
>
> - Assert(lockmethod < NumLockMethods);
> + Assert(lockmethodid < NumLockMethods);
>
> LOCK_PRINT("WaitOnLock: sleeping on lock", lock, lockmode);
>
> @@ -957,7 +934,7 @@
> waitLock->requested[lockmode]--;
> /* don't forget to clear waitMask bit if appropriate */
> if (waitLock->granted[lockmode] == waitLock->requested[lockmode])
> - waitLock->waitMask &= BITS_OFF[lockmode];
> + waitLock->waitMask &= LOCKBIT_OFF(lockmode);
>
> /* Clean up the proc's own state */
> proc->waitLock = NULL;
> @@ -968,7 +945,7 @@
> }
>
> /*
> - * LockRelease -- look up 'locktag' in lock table 'lockmethod' and
> + * LockRelease -- look up 'locktag' in lock table 'lockmethodid' and
> * release one 'lockmode' lock on it.
> *
> * Side Effects: find any waiting processes that are now wakable,
> @@ -978,27 +955,27 @@
> * come along and request the lock.)
> */
> bool
> -LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
> +LockRelease(LOCKMETHODID lockmethodid, LOCKTAG *locktag,
> TransactionId xid, LOCKMODE lockmode)
> {
> LOCK *lock;
> LWLockId masterLock;
> - LOCKMETHODTABLE *lockMethodTable;
> + LockMethod lockMethodTable;
> PROCLOCK *proclock;
> PROCLOCKTAG proclocktag;
> HTAB *proclockTable;
> bool wakeupNeeded = false;
>
> #ifdef LOCK_DEBUG
> - if (lockmethod == USER_LOCKMETHOD && Trace_userlocks)
> + if (lockmethodid == USER_LOCKMETHOD && Trace_userlocks)
> elog(LOG, "LockRelease: user lock tag [%u] %d", locktag->objId.blkno, lockmode);
> #endif
>
> /* ???????? This must be changed when short term locks will be used */
> - locktag->lockmethod = lockmethod;
> + locktag->lockmethodid = lockmethodid;
>
> - Assert(lockmethod < NumLockMethods);
> - lockMethodTable = LockMethodTable[lockmethod];
> + Assert(lockmethodid < NumLockMethods);
> + lockMethodTable = LockMethods[lockmethodid];
> if (!lockMethodTable)
> {
> elog(WARNING, "lockMethodTable is null in LockRelease");
> @@ -1045,7 +1022,7 @@
> {
> LWLockRelease(masterLock);
> #ifdef USER_LOCKS
> - if (lockmethod == USER_LOCKMETHOD)
> + if (lockmethodid == USER_LOCKMETHOD)
> elog(WARNING, "no lock with this tag");
> else
> #endif
> @@ -1083,7 +1060,7 @@
> if (lock->granted[lockmode] == 0)
> {
> /* change the conflict mask. No more of this lock type. */
> - lock->grantMask &= BITS_OFF[lockmode];
> + lock->grantMask &= LOCKBIT_OFF(lockmode);
> }
>
> LOCK_PRINT("LockRelease: updated", lock, lockmode);
> @@ -1173,29 +1150,29 @@
> * specified XID are released.
> */
> bool
> -LockReleaseAll(LOCKMETHOD lockmethod, PGPROC *proc,
> +LockReleaseAll(LOCKMETHODID lockmethodid, PGPROC *proc,
> bool allxids, TransactionId xid)
> {
> SHM_QUEUE *procHolders = &(proc->procHolders);
> PROCLOCK *proclock;
> PROCLOCK *nextHolder;
> LWLockId masterLock;
> - LOCKMETHODTABLE *lockMethodTable;
> + LockMethod lockMethodTable;
> int i,
> numLockModes;
> LOCK *lock;
>
> #ifdef LOCK_DEBUG
> - if (lockmethod == USER_LOCKMETHOD ? Trace_userlocks : Trace_locks)
> + if (lockmethodid == USER_LOCKMETHOD ? Trace_userlocks : Trace_locks)
> elog(LOG, "LockReleaseAll: lockmethod=%d, pid=%d",
> - lockmethod, proc->pid);
> + lockmethodid, proc->pid);
> #endif
>
> - Assert(lockmethod < NumLockMethods);
> - lockMethodTable = LockMethodTable[lockmethod];
> + Assert(lockmethodid < NumLockMethods);
> + lockMethodTable = LockMethods[lockmethodid];
> if (!lockMethodTable)
> {
> - elog(WARNING, "bad lock method: %d", lockmethod);
> + elog(WARNING, "bad lock method: %d", lockmethodid);
> return FALSE;
> }
>
> @@ -1220,7 +1197,7 @@
> lock = (LOCK *) MAKE_PTR(proclock->tag.lock);
>
> /* Ignore items that are not of the lockmethod to be removed */
> - if (LOCK_LOCKMETHOD(*lock) != lockmethod)
> + if (LOCK_LOCKMETHOD(*lock) != lockmethodid)
> goto next_item;
>
> /* If not allxids, ignore items that are of the wrong xid */
> @@ -1249,7 +1226,7 @@
> lock->granted[i] -= proclock->holding[i];
> Assert(lock->requested[i] >= 0 && lock->granted[i] >= 0);
> if (lock->granted[i] == 0)
> - lock->grantMask &= BITS_OFF[i];
> + lock->grantMask &= LOCKBIT_OFF(i);
>
> /*
> * Read comments in LockRelease
> @@ -1331,7 +1308,7 @@
> LWLockRelease(masterLock);
>
> #ifdef LOCK_DEBUG
> - if (lockmethod == USER_LOCKMETHOD ? Trace_userlocks : Trace_locks)
> + if (lockmethodid == USER_LOCKMETHOD ? Trace_userlocks : Trace_locks)
> elog(LOG, "LockReleaseAll done");
> #endif
>
> @@ -1346,7 +1323,7 @@
>
> size += MAXALIGN(sizeof(PROC_HDR)); /* ProcGlobal */
> size += maxBackends * MAXALIGN(sizeof(PGPROC)); /* each MyProc */
> - size += MAX_LOCK_METHODS * MAXALIGN(sizeof(LOCKMETHODTABLE)); /* each lockMethodTable */
> + size += MAX_LOCK_METHODS * MAXALIGN(sizeof(LockMethodData)); /* each lock method */
>
> /* lockHash table */
> size += hash_estimate_size(max_table_size, sizeof(LOCK));
> @@ -1390,7 +1367,7 @@
>
> LWLockAcquire(LockMgrLock, LW_EXCLUSIVE);
>
> - proclockTable = LockMethodTable[DEFAULT_LOCKMETHOD]->proclockHash;
> + proclockTable = LockMethods[DEFAULT_LOCKMETHOD]->proclockHash;
>
> data->nelements = i = proclockTable->hctl->nentries;
>
> @@ -1446,8 +1423,8 @@
> SHM_QUEUE *procHolders;
> PROCLOCK *proclock;
> LOCK *lock;
> - int lockmethod = DEFAULT_LOCKMETHOD;
> - LOCKMETHODTABLE *lockMethodTable;
> + int lockmethodid = DEFAULT_LOCKMETHOD;
> + LockMethod lockMethodTable;
>
> proc = MyProc;
> if (proc == NULL)
> @@ -1455,8 +1432,8 @@
>
> procHolders = &proc->procHolders;
>
> - Assert(lockmethod < NumLockMethods);
> - lockMethodTable = LockMethodTable[lockmethod];
> + Assert(lockmethodid < NumLockMethods);
> + lockMethodTable = LockMethods[lockmethodid];
> if (!lockMethodTable)
> return;
>
> @@ -1489,8 +1466,8 @@
> PGPROC *proc;
> PROCLOCK *proclock;
> LOCK *lock;
> - int lockmethod = DEFAULT_LOCKMETHOD;
> - LOCKMETHODTABLE *lockMethodTable;
> + int lockmethodid = DEFAULT_LOCKMETHOD;
> + LockMethod lockMethodTable;
> HTAB *proclockTable;
> HASH_SEQ_STATUS status;
>
> @@ -1498,8 +1475,8 @@
> if (proc == NULL)
> return;
>
> - Assert(lockmethod < NumLockMethods);
> - lockMethodTable = LockMethodTable[lockmethod];
> + Assert(lockmethodid < NumLockMethods);
> + lockMethodTable = LockMethods[lockmethodid];
> if (!lockMethodTable)
> return;
>
> diff -ruN ../base/src/backend/storage/lmgr/proc.c src/backend/storage/lmgr/proc.c
> --- ../base/src/backend/storage/lmgr/proc.c 2003-08-04 04:40:03.000000000 +0200
> +++ src/backend/storage/lmgr/proc.c 2003-09-07 07:35:06.000000000 +0200
> @@ -524,14 +524,14 @@
> * semaphore is normally zero, so when we try to acquire it, we sleep.
> */
> int
> -ProcSleep(LOCKMETHODTABLE *lockMethodTable,
> +ProcSleep(LockMethod lockMethodTable,
> LOCKMODE lockmode,
> LOCK *lock,
> PROCLOCK *proclock)
> {
> LWLockId masterLock = lockMethodTable->masterLock;
> PROC_QUEUE *waitQueue = &(lock->waitProcs);
> - int myHeldLocks = MyProc->heldLocks;
> + LOCKMASK myHeldLocks = MyProc->heldLocks;
> bool early_deadlock = false;
> PGPROC *proc;
> int i;
> @@ -556,7 +556,7 @@
> */
> if (myHeldLocks != 0)
> {
> - int aheadRequests = 0;
> + LOCKMASK aheadRequests = 0;
>
> proc = (PGPROC *) MAKE_PTR(waitQueue->links.next);
> for (i = 0; i < waitQueue->size; i++)
> @@ -596,7 +596,7 @@
> break;
> }
> /* Nope, so advance to next waiter */
> - aheadRequests |= (1 << proc->waitLockMode);
> + aheadRequests |= LOCKBIT_ON(proc->waitLockMode);
> proc = (PGPROC *) MAKE_PTR(proc->links.next);
> }
>
> @@ -618,7 +618,7 @@
> SHMQueueInsertBefore(&(proc->links), &(MyProc->links));
> waitQueue->size++;
>
> - lock->waitMask |= (1 << lockmode);
> + lock->waitMask |= LOCKBIT_ON(lockmode);
>
> /* Set up wait information in PGPROC object, too */
> MyProc->waitLock = lock;
> @@ -750,12 +750,12 @@
> * for lock, waken any that are no longer blocked.
> */
> void
> -ProcLockWakeup(LOCKMETHODTABLE *lockMethodTable, LOCK *lock)
> +ProcLockWakeup(LockMethod lockMethodTable, LOCK *lock)
> {
> PROC_QUEUE *waitQueue = &(lock->waitProcs);
> int queue_size = waitQueue->size;
> PGPROC *proc;
> - int aheadRequests = 0;
> + LOCKMASK aheadRequests = 0;
>
> Assert(queue_size >= 0);
>
> @@ -796,7 +796,7 @@
> * Cannot wake this guy. Remember his request for later
> * checks.
> */
> - aheadRequests |= (1 << lockmode);
> + aheadRequests |= LOCKBIT_ON(lockmode);
> proc = (PGPROC *) MAKE_PTR(proc->links.next);
> }
> }
> diff -ruN ../base/src/include/storage/lmgr.h src/include/storage/lmgr.h
> --- ../base/src/include/storage/lmgr.h 2003-08-04 04:40:14.000000000 +0200
> +++ src/include/storage/lmgr.h 2003-09-06 18:02:43.000000000 +0200
> @@ -40,10 +40,7 @@
> * so increase that if you want to add more modes.
> */
>
> -extern LOCKMETHOD LockTableId;
> -
> -
> -extern LOCKMETHOD InitLockTable(int maxBackends);
> +extern void InitLockTable(int maxBackends);
> extern void RelationInitLockInfo(Relation relation);
>
> /* Lock a relation */
> diff -ruN ../base/src/include/storage/lock.h src/include/storage/lock.h
> --- ../base/src/include/storage/lock.h 2003-08-04 04:40:14.000000000 +0200
> +++ src/include/storage/lock.h 2003-09-07 07:25:13.000000000 +0200
> @@ -42,22 +42,23 @@
>
>
> typedef int LOCKMASK;
> -
> typedef int LOCKMODE;
> -typedef int LOCKMETHOD;
> -
> /* MAX_LOCKMODES cannot be larger than the # of bits in LOCKMASK */
> #define MAX_LOCKMODES 10
>
> +#define LOCKBIT_ON(lockmode) (1 << (lockmode))
> +#define LOCKBIT_OFF(lockmode) (~(1 << (lockmode)))
> +
> +typedef uint16 LOCKMETHODID;
> /* MAX_LOCK_METHODS is the number of distinct lock control tables allowed */
> #define MAX_LOCK_METHODS 3
>
> -#define INVALID_TABLEID 0
> -
> -#define INVALID_LOCKMETHOD INVALID_TABLEID
> +#define INVALID_LOCKMETHOD 0
> #define DEFAULT_LOCKMETHOD 1
> #define USER_LOCKMETHOD 2
>
> +#define LockMethodIsValid(lockmethodid) ((lockmethodid) != INVALID_LOCKMETHOD)
> +
> /*
> * There is normally only one lock method, the default one.
> * If user locks are enabled, an additional lock method is present.
> @@ -83,15 +84,16 @@
> * masterLock -- synchronizes access to the table
> *
> */
> -typedef struct LOCKMETHODTABLE
> +typedef struct LockMethodData
> {
> - HTAB *lockHash;
> - HTAB *proclockHash;
> - LOCKMETHOD lockmethod;
> - int numLockModes;
> - int conflictTab[MAX_LOCKMODES];
> - LWLockId masterLock;
> -} LOCKMETHODTABLE;
> + HTAB *lockHash;
> + HTAB *proclockHash;
> + LOCKMETHODID lockmethodid;
> + int numLockModes;
> + LOCKMASK conflictTab[MAX_LOCKMODES];
> + LWLockId masterLock;
> +} LockMethodData;
> +typedef LockMethodData *LockMethod;
>
>
> /*
> @@ -115,7 +117,7 @@
> */
> OffsetNumber offnum;
>
> - uint16 lockmethod; /* needed by userlocks */
> + LOCKMETHODID lockmethodid; /* needed by userlocks */
> } LOCKTAG;
>
>
> @@ -139,8 +141,8 @@
> LOCKTAG tag; /* unique identifier of lockable object */
>
> /* data */
> - int grantMask; /* bitmask for lock types already granted */
> - int waitMask; /* bitmask for lock types awaited */
> + LOCKMASK grantMask; /* bitmask for lock types already granted */
> + LOCKMASK waitMask; /* bitmask for lock types awaited */
> SHM_QUEUE lockHolders; /* list of PROCLOCK objects assoc. with
> * lock */
> PROC_QUEUE waitProcs; /* list of PGPROC objects waiting on lock */
> @@ -151,7 +153,7 @@
> int nGranted; /* total of granted[] array */
> } LOCK;
>
> -#define LOCK_LOCKMETHOD(lock) ((lock).tag.lockmethod)
> +#define LOCK_LOCKMETHOD(lock) ((lock).tag.lockmethodid)
>
>
> /*
> @@ -204,7 +206,7 @@
> } PROCLOCK;
>
> #define PROCLOCK_LOCKMETHOD(proclock) \
> - (((LOCK *) MAKE_PTR((proclock).tag.lock))->tag.lockmethod)
> + (((LOCK *) MAKE_PTR((proclock).tag.lock))->tag.lockmethodid)
>
> /*
> * This struct holds information passed from lmgr internals to the lock
> @@ -227,17 +229,17 @@
> * function prototypes
> */
> extern void InitLocks(void);
> -extern LOCKMETHODTABLE *GetLocksMethodTable(LOCK *lock);
> -extern LOCKMETHOD LockMethodTableInit(char *tabName, LOCKMASK *conflictsP,
> +extern LockMethod GetLocksMethodTable(LOCK *lock);
> +extern LOCKMETHODID LockMethodTableInit(char *tabName, LOCKMASK *conflictsP,
> int numModes, int maxBackends);
> -extern LOCKMETHOD LockMethodTableRename(LOCKMETHOD lockmethod);
> -extern bool LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
> +extern LOCKMETHODID LockMethodTableRename(LOCKMETHODID lockmethodid);
> +extern bool LockAcquire(LOCKMETHODID lockmethodid, LOCKTAG *locktag,
> TransactionId xid, LOCKMODE lockmode, bool dontWait);
> -extern bool LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
> +extern bool LockRelease(LOCKMETHODID lockmethodid, LOCKTAG *locktag,
> TransactionId xid, LOCKMODE lockmode);
> -extern bool LockReleaseAll(LOCKMETHOD lockmethod, PGPROC *proc,
> +extern bool LockReleaseAll(LOCKMETHODID lockmethodid, PGPROC *proc,
> bool allxids, TransactionId xid);
> -extern int LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
> +extern int LockCheckConflicts(LockMethod lockMethodTable,
> LOCKMODE lockmode,
> LOCK *lock, PROCLOCK *proclock, PGPROC *proc,
> int *myHolding);
> diff -ruN ../base/src/include/storage/proc.h src/include/storage/proc.h
> --- ../base/src/include/storage/proc.h 2003-08-04 04:40:15.000000000 +0200
> +++ src/include/storage/proc.h 2003-09-06 22:45:54.000000000 +0200
> @@ -101,10 +101,10 @@
> extern void ProcReleaseLocks(bool isCommit);
>
> extern void ProcQueueInit(PROC_QUEUE *queue);
> -extern int ProcSleep(LOCKMETHODTABLE *lockMethodTable, LOCKMODE lockmode,
> +extern int ProcSleep(LockMethod lockMethodTable, LOCKMODE lockmode,
> LOCK *lock, PROCLOCK *proclock);
> extern PGPROC *ProcWakeup(PGPROC *proc, int errType);
> -extern void ProcLockWakeup(LOCKMETHODTABLE *lockMethodTable, LOCK *lock);
> +extern void ProcLockWakeup(LockMethod lockMethodTable, LOCK *lock);
> extern bool LockWaitCancel(void);
>
> extern void ProcWaitForSignal(void);

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073