diff options
Diffstat (limited to 'src/backend/access/transam/transsup.c')
| -rw-r--r-- | src/backend/access/transam/transsup.c | 225 |
1 files changed, 1 insertions, 224 deletions
diff --git a/src/backend/access/transam/transsup.c b/src/backend/access/transam/transsup.c index 227c47ef54..a80b769982 100644 --- a/src/backend/access/transam/transsup.c +++ b/src/backend/access/transam/transsup.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/transsup.c,v 1.13 1997/09/08 21:41:46 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/transsup.c,v 1.14 1997/11/02 15:24:44 vadim Exp $ * * NOTES * This file contains support functions for the high @@ -23,16 +23,10 @@ #include <access/xact.h> #include <storage/lmgr.h> -static AbsoluteTime -TransBlockGetCommitTime(Block tblock, - TransactionId transactionId); static XidStatus TransBlockGetXidStatus(Block tblock, TransactionId transactionId); static void -TransBlockSetCommitTime(Block tblock, - TransactionId transactionId, AbsoluteTime commitTime); -static void TransBlockSetXidStatus(Block tblock, TransactionId transactionId, XidStatus xstatus); @@ -73,8 +67,6 @@ TransComputeBlockNumber(Relation relation, /* relation to test */ */ if (relation == LogRelation) itemsPerBlock = TP_NumXidStatusPerBlock; - else if (relation == TimeRelation) - itemsPerBlock = TP_NumTimePerBlock; else elog(WARN, "TransComputeBlockNumber: unknown relation"); @@ -198,15 +190,6 @@ TransBlockGetXidStatus(Block tblock, BitIndex offset; /* ---------------- - * sanity check - * ---------------- - */ - if (tblock == NULL) - { - return XID_INVALID; - } - - /* ---------------- * calculate the index into the transaction data where * our transaction status is located * @@ -249,13 +232,6 @@ TransBlockSetXidStatus(Block tblock, BitIndex offset; /* ---------------- - * sanity check - * ---------------- - */ - if (tblock == NULL) - return; - - /* ---------------- * calculate the index into the transaction data where * we sould store our transaction status. * @@ -295,90 +271,6 @@ TransBlockSetXidStatus(Block tblock, } } -/* -------------------------------- - * TransBlockGetCommitTime - * - * This returns the transaction commit time for the - * specified transaction id in the trans block. - * -------------------------------- - */ -static AbsoluteTime -TransBlockGetCommitTime(Block tblock, - TransactionId transactionId) -{ - Index index; - AbsoluteTime *timeArray; - - /* ---------------- - * sanity check - * ---------------- - */ - if (tblock == NULL) - return INVALID_ABSTIME; - - /* ---------------- - * calculate the index into the transaction data where - * our transaction commit time is located - * - * XXX this will be replaced soon when we move to the - * new transaction id scheme -cim 3/23/90 - * - * The new scheme is here. -mer 5/24/92 - * ---------------- - */ - index = transactionId % TP_NumTimePerBlock; - - /* ---------------- - * return the commit time to the caller - * ---------------- - */ - timeArray = (AbsoluteTime *) tblock; - return (AbsoluteTime) - timeArray[index]; -} - -/* -------------------------------- - * TransBlockSetCommitTime - * - * This sets the commit time of the specified transaction - * -------------------------------- - */ -static void -TransBlockSetCommitTime(Block tblock, - TransactionId transactionId, - AbsoluteTime commitTime) -{ - Index index; - AbsoluteTime *timeArray; - - /* ---------------- - * sanity check - * ---------------- - */ - if (tblock == NULL) - return; - - - /* ---------------- - * calculate the index into the transaction data where - * we sould store our transaction status. - * - * XXX this will be replaced soon when we move to the - * new transaction id scheme -cim 3/23/90 - * - * The new scheme is here. -mer 5/24/92 - * ---------------- - */ - index = transactionId % TP_NumTimePerBlock; - - /* ---------------- - * store the transaction commit time at the specified index - * ---------------- - */ - timeArray = (AbsoluteTime *) tblock; - timeArray[index] = commitTime; -} - /* ---------------------------------------------------------------- * transam i/o support routines * ---------------------------------------------------------------- @@ -495,121 +387,6 @@ TransBlockNumberSetXidStatus(Relation relation, } /* -------------------------------- - * TransBlockNumberGetCommitTime - * -------------------------------- - */ -AbsoluteTime -TransBlockNumberGetCommitTime(Relation relation, - BlockNumber blockNumber, - TransactionId xid, - bool *failP) -{ - Buffer buffer; /* buffer associated with block */ - Block block; /* block containing commit time */ - bool localfail; /* bool used if failP = NULL */ - AbsoluteTime xtime; /* commit time */ - - /* ---------------- - * SOMEDAY place a read lock on the time relation - * - * That someday is today 5 Aug. 1991 -mer - * ---------------- - */ - RelationSetLockForRead(relation); - - /* ---------------- - * get the block containing the transaction information - * ---------------- - */ - buffer = ReadBuffer(relation, blockNumber); - block = BufferGetBlock(buffer); - - /* ---------------- - * get the commit time from the block - * note, for now we always return false in failP. - * ---------------- - */ - if (failP == NULL) - failP = &localfail; - (*failP) = false; - - xtime = TransBlockGetCommitTime(block, xid); - - /* ---------------- - * release the buffer and return the commit time - * ---------------- - */ - ReleaseBuffer(buffer); - - /* ---------------- - * SOMEDAY release our lock on the time relation - * ---------------- - */ - RelationUnsetLockForRead(relation); - - if ((*failP) == false) - return xtime; - else - return INVALID_ABSTIME; - -} - -/* -------------------------------- - * TransBlockNumberSetCommitTime - * -------------------------------- - */ -void -TransBlockNumberSetCommitTime(Relation relation, - BlockNumber blockNumber, - TransactionId xid, - AbsoluteTime xtime, - bool *failP) -{ - Buffer buffer; /* buffer associated with block */ - Block block; /* block containing commit time */ - bool localfail; /* bool used if failP = NULL */ - - /* ---------------- - * SOMEDAY gain exclusive access to the time relation - * - * That someday is today 5 Aug. 1991 -mer - * ---------------- - */ - RelationSetLockForWrite(relation); - - /* ---------------- - * get the block containing our commit time - * ---------------- - */ - buffer = ReadBuffer(relation, blockNumber); - block = BufferGetBlock(buffer); - - /* ---------------- - * attempt to update the commit time of the transaction on the block. - * if we are successful, write the block. otherwise release the buffer. - * note, for now we always return false in failP. - * ---------------- - */ - if (failP == NULL) - failP = &localfail; - (*failP) = false; - - TransBlockSetCommitTime(block, xid, xtime); - - if ((*failP) == false) - WriteBuffer(buffer); - else - ReleaseBuffer(buffer); - - /* ---------------- - * SOMEDAY release our lock on the time relation - * ---------------- - */ - RelationUnsetLockForWrite(relation); - -} - -/* -------------------------------- * TransGetLastRecordedTransaction * -------------------------------- */ |