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Do this TODO item:
* HOLDER/HOLDERTAB rename to PROCLOCK/PROCLOCKTAG (Tom) Didn't use PROCLOCKLINK because it made PROCLOCKLINKTAG too long.
This commit is contained in:
Bruce Momjian
parent
8ca61476e0
commit
f738747494
@ -12,7 +12,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/deadlock.c,v 1.4 2001/09/29 04:02:24 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/deadlock.c,v 1.5 2001/09/29 21:35:14 momjian Exp $
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*
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* Interface:
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*
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@ -382,7 +382,7 @@ FindLockCycleRecurse(PROC *checkProc,
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{
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PROC *proc;
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LOCK *lock;
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HOLDER *holder;
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PROCLOCK *holder;
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SHM_QUEUE *lockHolders;
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LOCKMETHODTABLE *lockMethodTable;
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LOCKMETHODCTL *lockctl;
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@ -434,8 +434,8 @@ FindLockCycleRecurse(PROC *checkProc,
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*/
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lockHolders = &(lock->lockHolders);
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holder = (HOLDER *) SHMQueueNext(lockHolders, lockHolders,
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offsetof(HOLDER, lockLink));
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holder = (PROCLOCK *) SHMQueueNext(lockHolders, lockHolders,
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offsetof(PROCLOCK, lockLink));
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while (holder)
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{
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@ -458,8 +458,8 @@ FindLockCycleRecurse(PROC *checkProc,
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}
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}
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holder = (HOLDER *) SHMQueueNext(lockHolders, &holder->lockLink,
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offsetof(HOLDER, lockLink));
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holder = (PROCLOCK *) SHMQueueNext(lockHolders, &holder->lockLink,
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offsetof(PROCLOCK, lockLink));
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}
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/*
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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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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.96 2001/09/29 04:02:24 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.97 2001/09/29 21:35:14 momjian Exp $
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*
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* NOTES
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* Outside modules can create a lock table and acquire/release
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@ -48,7 +48,7 @@ int max_locks_per_xact; /* set by guc.c */
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static int WaitOnLock(LOCKMETHOD lockmethod, LOCKMODE lockmode,
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LOCK *lock, HOLDER *holder);
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LOCK *lock, PROCLOCK *holder);
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static void LockCountMyLocks(SHMEM_OFFSET lockOffset, PROC *proc,
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int *myHolding);
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@ -125,18 +125,18 @@ LOCK_PRINT(const char *where, const LOCK *lock, LOCKMODE type)
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inline static void
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HOLDER_PRINT(const char *where, const HOLDER *holderP)
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PROCLOCK_PRINT(const char *where, const PROCLOCK *holderP)
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{
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if (
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(((HOLDER_LOCKMETHOD(*holderP) == DEFAULT_LOCKMETHOD && Trace_locks)
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|| (HOLDER_LOCKMETHOD(*holderP) == USER_LOCKMETHOD && Trace_userlocks))
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(((PROCLOCK_LOCKMETHOD(*holderP) == DEFAULT_LOCKMETHOD && Trace_locks)
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|| (PROCLOCK_LOCKMETHOD(*holderP) == USER_LOCKMETHOD && Trace_userlocks))
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&& (((LOCK *) MAKE_PTR(holderP->tag.lock))->tag.relId >= (Oid) Trace_lock_oidmin))
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|| (Trace_lock_table && (((LOCK *) MAKE_PTR(holderP->tag.lock))->tag.relId == Trace_lock_table))
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)
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elog(DEBUG,
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"%s: holder(%lx) lock(%lx) tbl(%d) proc(%lx) xid(%u) hold(%d,%d,%d,%d,%d,%d,%d)=%d",
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where, MAKE_OFFSET(holderP), holderP->tag.lock,
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HOLDER_LOCKMETHOD(*(holderP)),
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PROCLOCK_LOCKMETHOD(*(holderP)),
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holderP->tag.proc, holderP->tag.xid,
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holderP->holding[1], holderP->holding[2], holderP->holding[3],
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holderP->holding[4], holderP->holding[5], holderP->holding[6],
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@ -146,7 +146,7 @@ HOLDER_PRINT(const char *where, const HOLDER *holderP)
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#else /* not LOCK_DEBUG */
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#define LOCK_PRINT(where, lock, type)
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#define HOLDER_PRINT(where, holderP)
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#define PROCLOCK_PRINT(where, holderP)
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#endif /* not LOCK_DEBUG */
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@ -325,11 +325,11 @@ LockMethodTableInit(char *tabName,
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Assert(lockMethodTable->lockHash->hash == tag_hash);
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/*
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* allocate a hash table for HOLDER structs. This is used to store
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* allocate a hash table for PROCLOCK structs. This is used to store
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* per-lock-holder information.
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*/
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info.keysize = SHMEM_HOLDERTAB_KEYSIZE;
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info.datasize = SHMEM_HOLDERTAB_DATASIZE;
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info.keysize = SHMEM_PROCLOCKTAB_KEYSIZE;
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info.datasize = SHMEM_PROCLOCKTAB_DATASIZE;
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info.hash = tag_hash;
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hash_flags = (HASH_ELEM | HASH_FUNCTION);
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@ -449,8 +449,8 @@ bool
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LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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TransactionId xid, LOCKMODE lockmode, bool dontWait)
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{
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HOLDER *holder;
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HOLDERTAG holdertag;
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PROCLOCK *holder;
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PROCLOCKTAG holdertag;
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HTAB *holderTable;
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bool found;
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LOCK *lock;
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@ -520,7 +520,7 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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/*
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* Create the hash key for the holder table.
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*/
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MemSet(&holdertag, 0, sizeof(HOLDERTAG)); /* must clear padding,
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MemSet(&holdertag, 0, sizeof(PROCLOCKTAG)); /* must clear padding,
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* needed */
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holdertag.lock = MAKE_OFFSET(lock);
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holdertag.proc = MAKE_OFFSET(MyProc);
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@ -530,7 +530,7 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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* Find or create a holder entry with this tag
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*/
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holderTable = lockMethodTable->holderHash;
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holder = (HOLDER *) hash_search(holderTable, (Pointer) &holdertag,
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holder = (PROCLOCK *) hash_search(holderTable, (Pointer) &holdertag,
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HASH_ENTER, &found);
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if (!holder)
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{
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@ -549,11 +549,11 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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/* Add holder to appropriate lists */
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SHMQueueInsertBefore(&lock->lockHolders, &holder->lockLink);
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SHMQueueInsertBefore(&MyProc->procHolders, &holder->procLink);
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HOLDER_PRINT("LockAcquire: new", holder);
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PROCLOCK_PRINT("LockAcquire: new", holder);
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}
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else
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{
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HOLDER_PRINT("LockAcquire: found", holder);
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PROCLOCK_PRINT("LockAcquire: found", holder);
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Assert((holder->nHolding >= 0) && (holder->holding[lockmode] >= 0));
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Assert(holder->nHolding <= lock->nGranted);
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@ -606,7 +606,7 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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if (holder->holding[lockmode] > 0)
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{
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GrantLock(lock, holder, lockmode);
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HOLDER_PRINT("LockAcquire: owning", holder);
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PROCLOCK_PRINT("LockAcquire: owning", holder);
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LWLockRelease(masterLock);
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return TRUE;
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}
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@ -619,7 +619,7 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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if (myHolding[lockmode] > 0)
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{
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GrantLock(lock, holder, lockmode);
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HOLDER_PRINT("LockAcquire: my other XID owning", holder);
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PROCLOCK_PRINT("LockAcquire: my other XID owning", holder);
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LWLockRelease(masterLock);
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return TRUE;
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}
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@ -654,14 +654,14 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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{
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SHMQueueDelete(&holder->lockLink);
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SHMQueueDelete(&holder->procLink);
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holder = (HOLDER *) hash_search(holderTable,
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holder = (PROCLOCK *) hash_search(holderTable,
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(Pointer) holder,
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HASH_REMOVE, &found);
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if (!holder || !found)
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elog(NOTICE, "LockAcquire: remove holder, table corrupted");
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}
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else
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HOLDER_PRINT("LockAcquire: NHOLDING", holder);
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PROCLOCK_PRINT("LockAcquire: NHOLDING", holder);
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lock->nRequested--;
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lock->requested[lockmode]--;
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LOCK_PRINT("LockAcquire: conditional lock failed", lock, lockmode);
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@ -706,13 +706,13 @@ LockAcquire(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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*/
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if (!((holder->nHolding > 0) && (holder->holding[lockmode] > 0)))
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{
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HOLDER_PRINT("LockAcquire: INCONSISTENT", holder);
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PROCLOCK_PRINT("LockAcquire: INCONSISTENT", holder);
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LOCK_PRINT("LockAcquire: INCONSISTENT", lock, lockmode);
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/* Should we retry ? */
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LWLockRelease(masterLock);
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return FALSE;
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}
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HOLDER_PRINT("LockAcquire: granted", holder);
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PROCLOCK_PRINT("LockAcquire: granted", holder);
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LOCK_PRINT("LockAcquire: granted", lock, lockmode);
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}
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@ -741,7 +741,7 @@ int
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LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
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LOCKMODE lockmode,
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LOCK *lock,
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HOLDER *holder,
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PROCLOCK *holder,
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PROC *proc,
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int *myHolding) /* myHolding[] array or NULL */
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{
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@ -763,7 +763,7 @@ LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
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*/
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if (!(lockctl->conflictTab[lockmode] & lock->grantMask))
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{
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HOLDER_PRINT("LockCheckConflicts: no conflict", holder);
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PROCLOCK_PRINT("LockCheckConflicts: no conflict", holder);
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return STATUS_OK;
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}
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@ -797,11 +797,11 @@ LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
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if (!(lockctl->conflictTab[lockmode] & bitmask))
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{
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/* no conflict. OK to get the lock */
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HOLDER_PRINT("LockCheckConflicts: resolved", holder);
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PROCLOCK_PRINT("LockCheckConflicts: resolved", holder);
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return STATUS_OK;
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}
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HOLDER_PRINT("LockCheckConflicts: conflicting", holder);
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PROCLOCK_PRINT("LockCheckConflicts: conflicting", holder);
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return STATUS_FOUND;
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}
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@ -819,13 +819,13 @@ static void
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LockCountMyLocks(SHMEM_OFFSET lockOffset, PROC *proc, int *myHolding)
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{
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SHM_QUEUE *procHolders = &(proc->procHolders);
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HOLDER *holder;
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PROCLOCK *holder;
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int i;
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MemSet(myHolding, 0, MAX_LOCKMODES * sizeof(int));
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holder = (HOLDER *) SHMQueueNext(procHolders, procHolders,
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offsetof(HOLDER, procLink));
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holder = (PROCLOCK *) SHMQueueNext(procHolders, procHolders,
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offsetof(PROCLOCK, procLink));
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while (holder)
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{
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@ -835,8 +835,8 @@ LockCountMyLocks(SHMEM_OFFSET lockOffset, PROC *proc, int *myHolding)
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myHolding[i] += holder->holding[i];
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}
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holder = (HOLDER *) SHMQueueNext(procHolders, &holder->procLink,
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offsetof(HOLDER, procLink));
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holder = (PROCLOCK *) SHMQueueNext(procHolders, &holder->procLink,
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offsetof(PROCLOCK, procLink));
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}
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}
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@ -848,7 +848,7 @@ LockCountMyLocks(SHMEM_OFFSET lockOffset, PROC *proc, int *myHolding)
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* and have its waitLock/waitHolder fields cleared. That's not done here.
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*/
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void
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GrantLock(LOCK *lock, HOLDER *holder, LOCKMODE lockmode)
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GrantLock(LOCK *lock, PROCLOCK *holder, LOCKMODE lockmode)
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{
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lock->nGranted++;
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lock->granted[lockmode]++;
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@ -873,7 +873,7 @@ GrantLock(LOCK *lock, HOLDER *holder, LOCKMODE lockmode)
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*/
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static int
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WaitOnLock(LOCKMETHOD lockmethod, LOCKMODE lockmode,
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LOCK *lock, HOLDER *holder)
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LOCK *lock, PROCLOCK *holder)
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{
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LOCKMETHODTABLE *lockMethodTable = LockMethodTable[lockmethod];
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char *new_status,
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@ -991,8 +991,8 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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LWLockId masterLock;
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bool found;
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LOCKMETHODTABLE *lockMethodTable;
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HOLDER *holder;
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HOLDERTAG holdertag;
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PROCLOCK *holder;
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PROCLOCKTAG holdertag;
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HTAB *holderTable;
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bool wakeupNeeded = false;
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@ -1044,14 +1044,14 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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/*
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* Find the holder entry for this holder.
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*/
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MemSet(&holdertag, 0, sizeof(HOLDERTAG)); /* must clear padding,
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MemSet(&holdertag, 0, sizeof(PROCLOCKTAG)); /* must clear padding,
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* needed */
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holdertag.lock = MAKE_OFFSET(lock);
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holdertag.proc = MAKE_OFFSET(MyProc);
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TransactionIdStore(xid, &holdertag.xid);
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holderTable = lockMethodTable->holderHash;
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holder = (HOLDER *) hash_search(holderTable, (Pointer) &holdertag,
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holder = (PROCLOCK *) hash_search(holderTable, (Pointer) &holdertag,
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HASH_FIND_SAVE, &found);
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if (!holder || !found)
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{
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@ -1064,7 +1064,7 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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elog(NOTICE, "LockRelease: holder table corrupted");
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return FALSE;
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}
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HOLDER_PRINT("LockRelease: found", holder);
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PROCLOCK_PRINT("LockRelease: found", holder);
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/*
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* Check that we are actually holding a lock of the type we want to
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@ -1072,7 +1072,7 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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*/
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if (!(holder->holding[lockmode] > 0))
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{
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HOLDER_PRINT("LockRelease: WRONGTYPE", holder);
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PROCLOCK_PRINT("LockRelease: WRONGTYPE", holder);
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Assert(holder->holding[lockmode] >= 0);
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LWLockRelease(masterLock);
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elog(NOTICE, "LockRelease: you don't own a lock of type %s",
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@ -1141,7 +1141,7 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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*/
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holder->holding[lockmode]--;
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holder->nHolding--;
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HOLDER_PRINT("LockRelease: updated", holder);
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PROCLOCK_PRINT("LockRelease: updated", holder);
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Assert((holder->nHolding >= 0) && (holder->holding[lockmode] >= 0));
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/*
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@ -1150,10 +1150,10 @@ LockRelease(LOCKMETHOD lockmethod, LOCKTAG *locktag,
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*/
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if (holder->nHolding == 0)
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{
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HOLDER_PRINT("LockRelease: deleting", holder);
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PROCLOCK_PRINT("LockRelease: deleting", holder);
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SHMQueueDelete(&holder->lockLink);
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SHMQueueDelete(&holder->procLink);
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holder = (HOLDER *) hash_search(holderTable, (Pointer) &holder,
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holder = (PROCLOCK *) hash_search(holderTable, (Pointer) &holder,
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HASH_REMOVE_SAVED, &found);
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if (!holder || !found)
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{
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@ -1189,8 +1189,8 @@ LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
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bool allxids, TransactionId xid)
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{
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SHM_QUEUE *procHolders = &(proc->procHolders);
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HOLDER *holder;
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HOLDER *nextHolder;
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PROCLOCK *holder;
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PROCLOCK *nextHolder;
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LWLockId masterLock;
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LOCKMETHODTABLE *lockMethodTable;
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int i,
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@ -1217,16 +1217,16 @@ LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
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LWLockAcquire(masterLock, LW_EXCLUSIVE);
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holder = (HOLDER *) SHMQueueNext(procHolders, procHolders,
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offsetof(HOLDER, procLink));
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holder = (PROCLOCK *) SHMQueueNext(procHolders, procHolders,
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offsetof(PROCLOCK, procLink));
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while (holder)
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{
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bool wakeupNeeded = false;
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/* Get link first, since we may unlink/delete this holder */
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nextHolder = (HOLDER *) SHMQueueNext(procHolders, &holder->procLink,
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offsetof(HOLDER, procLink));
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nextHolder = (PROCLOCK *) SHMQueueNext(procHolders, &holder->procLink,
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offsetof(PROCLOCK, procLink));
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Assert(holder->tag.proc == MAKE_OFFSET(proc));
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@ -1240,7 +1240,7 @@ LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
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if (!allxids && !TransactionIdEquals(xid, holder->tag.xid))
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goto next_item;
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HOLDER_PRINT("LockReleaseAll", holder);
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PROCLOCK_PRINT("LockReleaseAll", holder);
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LOCK_PRINT("LockReleaseAll", lock, 0);
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Assert(lock->nRequested >= 0);
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Assert(lock->nGranted >= 0);
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@ -1294,7 +1294,7 @@ LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
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}
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LOCK_PRINT("LockReleaseAll: updated", lock, 0);
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HOLDER_PRINT("LockReleaseAll: deleting", holder);
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PROCLOCK_PRINT("LockReleaseAll: deleting", holder);
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/*
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* Remove the holder entry from the linked lists
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@ -1305,7 +1305,7 @@ LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
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/*
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* remove the holder entry from the hashtable
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*/
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holder = (HOLDER *) hash_search(lockMethodTable->holderHash,
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holder = (PROCLOCK *) hash_search(lockMethodTable->holderHash,
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(Pointer) holder,
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HASH_REMOVE,
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&found);
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@ -1370,8 +1370,8 @@ LockShmemSize(int maxBackends)
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/* holderHash table */
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size += hash_estimate_size(max_table_size,
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SHMEM_HOLDERTAB_KEYSIZE,
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SHMEM_HOLDERTAB_DATASIZE);
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SHMEM_PROCLOCKTAB_KEYSIZE,
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SHMEM_PROCLOCKTAB_DATASIZE);
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/*
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* Since the lockHash entry count above is only an estimate, add 10%
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@ -1394,7 +1394,7 @@ DumpLocks(void)
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{
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PROC *proc;
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SHM_QUEUE *procHolders;
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HOLDER *holder;
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PROCLOCK *holder;
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LOCK *lock;
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int lockmethod = DEFAULT_LOCKMETHOD;
|
||||
LOCKMETHODTABLE *lockMethodTable;
|
||||
@ -1413,8 +1413,8 @@ DumpLocks(void)
|
||||
if (proc->waitLock)
|
||||
LOCK_PRINT("DumpLocks: waiting on", proc->waitLock, 0);
|
||||
|
||||
holder = (HOLDER *) SHMQueueNext(procHolders, procHolders,
|
||||
offsetof(HOLDER, procLink));
|
||||
holder = (PROCLOCK *) SHMQueueNext(procHolders, procHolders,
|
||||
offsetof(PROCLOCK, procLink));
|
||||
|
||||
while (holder)
|
||||
{
|
||||
@ -1422,11 +1422,11 @@ DumpLocks(void)
|
||||
|
||||
lock = (LOCK *) MAKE_PTR(holder->tag.lock);
|
||||
|
||||
HOLDER_PRINT("DumpLocks", holder);
|
||||
PROCLOCK_PRINT("DumpLocks", holder);
|
||||
LOCK_PRINT("DumpLocks", lock, 0);
|
||||
|
||||
holder = (HOLDER *) SHMQueueNext(procHolders, &holder->procLink,
|
||||
offsetof(HOLDER, procLink));
|
||||
holder = (PROCLOCK *) SHMQueueNext(procHolders, &holder->procLink,
|
||||
offsetof(PROCLOCK, procLink));
|
||||
}
|
||||
}
|
||||
|
||||
@ -1437,7 +1437,7 @@ void
|
||||
DumpAllLocks(void)
|
||||
{
|
||||
PROC *proc;
|
||||
HOLDER *holder = NULL;
|
||||
PROCLOCK *holder = NULL;
|
||||
LOCK *lock;
|
||||
int lockmethod = DEFAULT_LOCKMETHOD;
|
||||
LOCKMETHODTABLE *lockMethodTable;
|
||||
@ -1459,10 +1459,10 @@ DumpAllLocks(void)
|
||||
LOCK_PRINT("DumpAllLocks: waiting on", proc->waitLock, 0);
|
||||
|
||||
hash_seq_init(&status, holderTable);
|
||||
while ((holder = (HOLDER *) hash_seq_search(&status)) &&
|
||||
(holder != (HOLDER *) TRUE))
|
||||
while ((holder = (PROCLOCK *) hash_seq_search(&status)) &&
|
||||
(holder != (PROCLOCK *) TRUE))
|
||||
{
|
||||
HOLDER_PRINT("DumpAllLocks", holder);
|
||||
PROCLOCK_PRINT("DumpAllLocks", holder);
|
||||
|
||||
if (holder->tag.lock)
|
||||
{
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.109 2001/09/29 04:02:24 tgl Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.110 2001/09/29 21:35:14 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -563,7 +563,7 @@ int
|
||||
ProcSleep(LOCKMETHODTABLE *lockMethodTable,
|
||||
LOCKMODE lockmode,
|
||||
LOCK *lock,
|
||||
HOLDER *holder)
|
||||
PROCLOCK *holder)
|
||||
{
|
||||
LOCKMETHODCTL *lockctl = lockMethodTable->ctl;
|
||||
LWLockId masterLock = lockctl->masterLock;
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: lock.h,v 1.53 2001/09/29 04:02:26 tgl Exp $
|
||||
* $Id: lock.h,v 1.54 2001/09/29 21:35:14 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -144,7 +144,7 @@ typedef struct LOCKTAG
|
||||
* tag -- uniquely identifies the object being locked
|
||||
* grantMask -- bitmask for all lock types currently granted on this object.
|
||||
* waitMask -- bitmask for all lock types currently awaited on this object.
|
||||
* lockHolders -- list of HOLDER objects for this lock.
|
||||
* lockHolders -- list of PROCLOCK objects for this lock.
|
||||
* waitProcs -- queue of processes waiting for this lock.
|
||||
* requested -- count of each lock type currently requested on the lock
|
||||
* (includes requests already granted!!).
|
||||
@ -160,7 +160,7 @@ typedef struct LOCK
|
||||
/* data */
|
||||
int grantMask; /* bitmask for lock types already granted */
|
||||
int waitMask; /* bitmask for lock types awaited */
|
||||
SHM_QUEUE lockHolders; /* list of HOLDER objects assoc. with lock */
|
||||
SHM_QUEUE lockHolders; /* list of PROCLOCK objects assoc. with lock */
|
||||
PROC_QUEUE waitProcs; /* list of PROC objects waiting on lock */
|
||||
int requested[MAX_LOCKMODES]; /* counts of requested
|
||||
* locks */
|
||||
@ -180,8 +180,8 @@ typedef struct LOCK
|
||||
* on the same lockable object. We need to store some per-holder information
|
||||
* for each such holder (or would-be holder).
|
||||
*
|
||||
* HOLDERTAG is the key information needed to look up a HOLDER item in the
|
||||
* holder hashtable. A HOLDERTAG value uniquely identifies a lock holder.
|
||||
* PROCLOCKTAG is the key information needed to look up a PROCLOCK item in the
|
||||
* holder hashtable. A PROCLOCKTAG value uniquely identifies a lock holder.
|
||||
*
|
||||
* There are two possible kinds of holder tags: a transaction (identified
|
||||
* both by the PROC of the backend running it, and the xact's own ID) and
|
||||
@ -197,35 +197,35 @@ typedef struct LOCK
|
||||
* Otherwise, holder objects whose counts have gone to zero are recycled
|
||||
* as soon as convenient.
|
||||
*
|
||||
* Each HOLDER object is linked into lists for both the associated LOCK object
|
||||
* and the owning PROC object. Note that the HOLDER is entered into these
|
||||
* Each PROCLOCK object is linked into lists for both the associated LOCK object
|
||||
* and the owning PROC object. Note that the PROCLOCK is entered into these
|
||||
* lists as soon as it is created, even if no lock has yet been granted.
|
||||
* A PROC that is waiting for a lock to be granted will also be linked into
|
||||
* the lock's waitProcs queue.
|
||||
*/
|
||||
typedef struct HOLDERTAG
|
||||
typedef struct PROCLOCKTAG
|
||||
{
|
||||
SHMEM_OFFSET lock; /* link to per-lockable-object information */
|
||||
SHMEM_OFFSET proc; /* link to PROC of owning backend */
|
||||
TransactionId xid; /* xact ID, or InvalidTransactionId */
|
||||
} HOLDERTAG;
|
||||
} PROCLOCKTAG;
|
||||
|
||||
typedef struct HOLDER
|
||||
typedef struct PROCLOCK
|
||||
{
|
||||
/* tag */
|
||||
HOLDERTAG tag; /* unique identifier of holder object */
|
||||
PROCLOCKTAG tag; /* unique identifier of holder object */
|
||||
|
||||
/* data */
|
||||
int holding[MAX_LOCKMODES]; /* count of locks currently held */
|
||||
int nHolding; /* total of holding[] array */
|
||||
SHM_QUEUE lockLink; /* list link for lock's list of holders */
|
||||
SHM_QUEUE procLink; /* list link for process's list of holders */
|
||||
} HOLDER;
|
||||
} PROCLOCK;
|
||||
|
||||
#define SHMEM_HOLDERTAB_KEYSIZE sizeof(HOLDERTAG)
|
||||
#define SHMEM_HOLDERTAB_DATASIZE (sizeof(HOLDER) - SHMEM_HOLDERTAB_KEYSIZE)
|
||||
#define SHMEM_PROCLOCKTAB_KEYSIZE sizeof(PROCLOCKTAG)
|
||||
#define SHMEM_PROCLOCKTAB_DATASIZE (sizeof(PROCLOCK) - SHMEM_PROCLOCKTAB_KEYSIZE)
|
||||
|
||||
#define HOLDER_LOCKMETHOD(holder) \
|
||||
#define PROCLOCK_LOCKMETHOD(holder) \
|
||||
(((LOCK *) MAKE_PTR((holder).tag.lock))->tag.lockmethod)
|
||||
|
||||
|
||||
@ -245,9 +245,9 @@ extern bool LockReleaseAll(LOCKMETHOD lockmethod, PROC *proc,
|
||||
bool allxids, TransactionId xid);
|
||||
extern int LockCheckConflicts(LOCKMETHODTABLE *lockMethodTable,
|
||||
LOCKMODE lockmode,
|
||||
LOCK *lock, HOLDER *holder, PROC *proc,
|
||||
LOCK *lock, PROCLOCK *holder, PROC *proc,
|
||||
int *myHolding);
|
||||
extern void GrantLock(LOCK *lock, HOLDER *holder, LOCKMODE lockmode);
|
||||
extern void GrantLock(LOCK *lock, PROCLOCK *holder, LOCKMODE lockmode);
|
||||
extern void RemoveFromWaitQueue(PROC *proc);
|
||||
extern int LockShmemSize(int maxBackends);
|
||||
extern bool DeadLockCheck(PROC *proc);
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $Id: proc.h,v 1.48 2001/09/29 04:02:26 tgl Exp $
|
||||
* $Id: proc.h,v 1.49 2001/09/29 21:35:14 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -67,12 +67,12 @@ struct PROC
|
||||
/* Info about lock the process is currently waiting for, if any. */
|
||||
/* waitLock and waitHolder are NULL if not currently waiting. */
|
||||
LOCK *waitLock; /* Lock object we're sleeping on ... */
|
||||
HOLDER *waitHolder; /* Per-holder info for awaited lock */
|
||||
PROCLOCK *waitHolder; /* Per-holder info for awaited lock */
|
||||
LOCKMODE waitLockMode; /* type of lock we're waiting for */
|
||||
LOCKMASK heldLocks; /* bitmask for lock types already held on
|
||||
* this lock object by this backend */
|
||||
|
||||
SHM_QUEUE procHolders; /* list of HOLDER objects for locks held
|
||||
SHM_QUEUE procHolders; /* list of PROCLOCK objects for locks held
|
||||
* or awaited by this backend */
|
||||
};
|
||||
|
||||
@ -138,7 +138,7 @@ extern void ProcReleaseLocks(bool isCommit);
|
||||
|
||||
extern void ProcQueueInit(PROC_QUEUE *queue);
|
||||
extern int ProcSleep(LOCKMETHODTABLE *lockMethodTable, LOCKMODE lockmode,
|
||||
LOCK *lock, HOLDER *holder);
|
||||
LOCK *lock, PROCLOCK *holder);
|
||||
extern PROC *ProcWakeup(PROC *proc, int errType);
|
||||
extern void ProcLockWakeup(LOCKMETHODTABLE *lockMethodTable, LOCK *lock);
|
||||
extern bool LockWaitCancel(void);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user