diff options
Diffstat (limited to 'src/backend/storage/lmgr/single.c')
| -rw-r--r-- | src/backend/storage/lmgr/single.c | 93 |
1 files changed, 45 insertions, 48 deletions
diff --git a/src/backend/storage/lmgr/single.c b/src/backend/storage/lmgr/single.c index 20feddbed9f..80220368437 100644 --- a/src/backend/storage/lmgr/single.c +++ b/src/backend/storage/lmgr/single.c @@ -1,19 +1,19 @@ /*------------------------------------------------------------------------- * * single.c-- - * set single locks in the multi-level lock hierarchy + * 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. + * 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. * * Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/storage/lmgr/Attic/single.c,v 1.2 1996/11/03 05:07:33 scrappy Exp $ + * $Header: /cvsroot/pgsql/src/backend/storage/lmgr/Attic/single.c,v 1.3 1997/09/07 04:49:04 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -21,7 +21,7 @@ #include "postgres.h" -#include "storage/lmgr.h" /* where the declarations go */ +#include "storage/lmgr.h" /* where the declarations go */ #include "storage/lock.h" #include "storage/multilev.h" #include "utils/rel.h" @@ -34,28 +34,27 @@ bool SingleLockReln(LockInfo linfo, LOCKT lockt, 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 = linfo->lRelId.relId; - tag.dbId = linfo->lRelId.dbId; - BlockIdSet(&(tag.tupleId.ip_blkid), InvalidBlockNumber); - tag.tupleId.ip_posid = InvalidOffsetNumber; - - if (action == UNLOCK) - return(LockRelease(MultiTableId, &tag, lockt)); - else - return(LockAcquire(MultiTableId, &tag, lockt)); + 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 = linfo->lRelId.relId; + tag.dbId = linfo->lRelId.dbId; + BlockIdSet(&(tag.tupleId.ip_blkid), InvalidBlockNumber); + tag.tupleId.ip_posid = InvalidOffsetNumber; + + if (action == UNLOCK) + return (LockRelease(MultiTableId, &tag, lockt)); + else + return (LockAcquire(MultiTableId, &tag, lockt)); } /* * SingleLockPage -- use multi-level lock table, but lock - * only at the page level. + * only at the page level. * * Assumes that an INTENT lock has already been set in the * multi-level lock table. @@ -63,27 +62,25 @@ SingleLockReln(LockInfo linfo, LOCKT lockt, int action) */ bool SingleLockPage(LockInfo linfo, - ItemPointer tidPtr, - LOCKT lockt, - int action) + ItemPointer tidPtr, + LOCKT lockt, + 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 = linfo->lRelId.relId; - tag.dbId = linfo->lRelId.dbId; - BlockIdCopy(&(tag.tupleId.ip_blkid), &(tidPtr->ip_blkid)); - tag.tupleId.ip_posid = InvalidOffsetNumber; - - - if (action == UNLOCK) - return(LockRelease(MultiTableId, &tag, lockt)); - else - return(LockAcquire(MultiTableId, &tag, lockt)); -} + 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 = linfo->lRelId.relId; + tag.dbId = linfo->lRelId.dbId; + BlockIdCopy(&(tag.tupleId.ip_blkid), &(tidPtr->ip_blkid)); + tag.tupleId.ip_posid = InvalidOffsetNumber; + + + if (action == UNLOCK) + return (LockRelease(MultiTableId, &tag, lockt)); + else + return (LockAcquire(MultiTableId, &tag, lockt)); +} |