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- /*
- * $RCSfile: freeUpgradeEntry.c,v $
- * $Revision: 1.1.1.1 $
- * $Date: 1996/05/04 21:55:51 $
- */
- /**********************************************************************
- * EXODUS Database Toolkit Software
- * Copyright (c) 1991 Computer Sciences Department, University of
- * Wisconsin -- Madison
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * THE COMPUTER SCIENCES DEPARTMENT OF THE UNIVERSITY OF WISCONSIN --
- * MADISON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION.
- * THE DEPARTMENT DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES
- * WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * The EXODUS Project Group requests users of this software to return
- * any improvements or extensions that they make to:
- *
- * EXODUS Project Group
- * c/o David J. DeWitt and Michael J. Carey
- * Computer Sciences Department
- * University of Wisconsin -- Madison
- * Madison, WI 53706
- *
- * or exodus@cs.wisc.edu
- *
- * In addition, the EXODUS Project Group requests that users grant the
- * Computer Sciences Department rights to redistribute these changes.
- **********************************************************************/
-
- #include "sysdefs.h"
- #include "ess.h"
- #include "checking.h"
- #include "trace.h"
- #include "error.h"
- #include "list.h"
- #include "pool.h"
- #include "tid.h"
- #include "io.h"
- #include "lock.h"
- #include "object.h"
- #include "msgdefs.h"
- #include "thread.h"
- #include "semaphore.h"
- #include "link.h"
- #include "lsn.h"
- #include "latch.h"
- #include "bf.h"
- #include "volume.h"
- #include "trans.h"
- #include "lm_intfuncs.h"
- #include "lm_extfuncs.h"
-
-
- void
- freeUpgradeEntry (
-
- register LOCKHEADER *lockHeader,
- register LOCKENTRY *masterEntry,
- int error
- )
- {
-
- register LOCKENTRY *lockEntry;
-
-
- TRACE(TR_LOCK, TR_LEVEL_1);
-
- /*
- * Get a pointer to the bucket
- */
- lockEntry = (LOCKENTRY *) FIRST_LIST_ELEMENT( &(lockHeader->upgradeList) );
-
- /*
- * search down the list
- */
- while (lockEntry != NULL) {
-
- TRPRINT(TR_LOCK, TR_LEVEL_2, ("looking at tid:%x",
- GETTID(lockEntry->headerList.transRec)));
-
- /*
- * check the entry magic number
- */
- CHECK_LOCKENTRY_MAGIC(lockEntry);
-
- /*
- * try to match the lock ids
- */
- if (masterEntry == ((LOCKENTRY *) lockEntry->lockHeader)) {
-
- /*
- * free the entry
- */
- freeLockEntry(lockEntry, error);
-
- /*
- * MJZ: 6-27-90
- * Return here since only one upgrade can be pending for
- * a specific lock held by a transaction.
- */
- return;
-
- } else {
-
- /*
- * look at the next element
- */
- lockEntry = (LOCKENTRY *) NEXT_LIST_ELEMENT( &(lockEntry->headerList.list) );
- }
- }
-
- /*
- * we should never get to here
- */
- SM_ERROR(TYPE_FATAL, esmINTERNAL);
- }
-