Remove multi.c and single.c, which have been dead code for

over two years.

src/backend/storage/lmgr/single.c

-/*-------------------------------------------------------------------------
- *
- * single.c
- *	  set single locks in the multi-level lock hierarchy
- *
- *	  Sometimes we don't want to set all levels of the multi-level
- *		lock hierarchy at once.  This allows us to set and release
- *		one level at a time.  It's useful in index scans when
- *		you can set an intent lock at the beginning and thereafter
- *		only set page locks.  Tends to speed things up.
- *
- * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/lmgr/Attic/single.c,v 1.13 2000/01/26 05:57:02 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-
-#include "postgres.h"
-
-#include "storage/lmgr.h"
-#include "storage/lock.h"
-#include "storage/multilev.h"
-#include "utils/rel.h"
-
-/*
- * SingleLockReln -- lock a relation
- *
- * Returns: TRUE if the lock can be set, FALSE otherwise.
- */
-bool
-SingleLockReln(LockInfo lockinfo, LOCKMODE lockmode, int action)
-{
-	LOCKTAG		tag;
-
-	/*
-	 * LOCKTAG has two bytes of padding, unfortunately.  The hash function
-	 * will return miss if the padding bytes aren't zero'd.
-	 */
-	MemSet(&tag, 0, sizeof(tag));
-	tag.relId = lockinfo->lockRelId.relId;
-	tag.dbId = lockinfo->lockRelId.dbId;
-	BlockIdSet(&(tag.tupleId.ip_blkid), InvalidBlockNumber);
-	tag.tupleId.ip_posid = InvalidOffsetNumber;
-
-	if (action == UNLOCK)
-		return LockRelease(MultiTableId, &tag, lockmode);
-	else
-		return LockAcquire(MultiTableId, &tag, lockmode);
-}
-
-/*
- * SingleLockPage -- use multi-level lock table, but lock
- *		only at the page level.
- *
- * Assumes that an INTENT lock has already been set in the
- * multi-level lock table.
- *
- */
-bool
-SingleLockPage(LockInfo lockinfo,
-			   ItemPointer tidPtr,
-			   LOCKMODE lockmode,
-			   int action)
-{
-	LOCKTAG		tag;
-
-	/*
-	 * LOCKTAG has two bytes of padding, unfortunately.  The hash function
-	 * will return miss if the padding bytes aren't zero'd.
-	 */
-	MemSet(&tag, 0, sizeof(tag));
-	tag.relId = lockinfo->lockRelId.relId;
-	tag.dbId = lockinfo->lockRelId.dbId;
-	BlockIdCopy(&(tag.tupleId.ip_blkid), &(tidPtr->ip_blkid));
-	tag.tupleId.ip_posid = InvalidOffsetNumber;
-
-
-	if (action == UNLOCK)
-		return LockRelease(MultiTableId, &tag, lockmode);
-	else
-		return LockAcquire(MultiTableId, &tag, lockmode);
-}