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This commit is contained in:
Vadim B. Mikheev
1997-11-02 15:27:14 +00:00
parent 6cc0a00dec
commit 32cd09ac6d
36 changed files with 265 additions and 1841 deletions
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124
src/backend/access/transam/varsup.c
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@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.12 1997/09/08 21:41:49 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/varsup.c,v 1.13 1997/11/02 15:24:45 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -23,9 +23,7 @@
static void GetNewObjectIdBlock(Oid *oid_return, int oid_block_size);
static void VariableRelationGetNextOid(Oid *oid_return);
static void VariableRelationGetNextXid(TransactionId *xidP);
static void VariableRelationPutLastXid(TransactionId xid);
static void VariableRelationPutNextOid(Oid *oidP);
static void VariableRelationGetLastXid(TransactionId *xidP);
/* ---------------------
* spin lock for oid generation
@@ -80,49 +78,6 @@ VariableRelationGetNextXid(TransactionId *xidP)
ReleaseBuffer(buf);
}
/* --------------------------------
* VariableRelationGetLastXid
* --------------------------------
*/
static void
VariableRelationGetLastXid(TransactionId *xidP)
{
Buffer buf;
VariableRelationContents var;
/* ----------------
* We assume that a spinlock has been acquire to guarantee
* exclusive access to the variable relation.
* ----------------
*/
/* ----------------
* do nothing before things are initialized
* ----------------
*/
if (!RelationIsValid(VariableRelation))
return;
/* ----------------
* read the variable page, get the the lastXid field and
* release the buffer
* ----------------
*/
buf = ReadBuffer(VariableRelation, 0);
if (!BufferIsValid(buf))
{
SpinRelease(OidGenLockId);
elog(WARN, "VariableRelationGetNextXid: ReadBuffer failed");
}
var = (VariableRelationContents) BufferGetBlock(buf);
TransactionIdStore(var->lastXidData, xidP);
ReleaseBuffer(buf);
}
/* --------------------------------
* VariableRelationPutNextXid
* --------------------------------
@@ -169,49 +124,6 @@ VariableRelationPutNextXid(TransactionId xid)
SetBufferWriteMode(flushmode);
}
/* --------------------------------
* VariableRelationPutLastXid
* --------------------------------
*/
static void
VariableRelationPutLastXid(TransactionId xid)
{
Buffer buf;
VariableRelationContents var;
/* ----------------
* We assume that a spinlock has been acquire to guarantee
* exclusive access to the variable relation.
* ----------------
*/
/* ----------------
* do nothing before things are initialized
* ----------------
*/
if (!RelationIsValid(VariableRelation))
return;
/* ----------------
* read the variable page, update the lastXid field and
* force the page back out to disk.
* ----------------
*/
buf = ReadBuffer(VariableRelation, 0);
if (!BufferIsValid(buf))
{
SpinRelease(OidGenLockId);
elog(WARN, "VariableRelationPutLastXid: ReadBuffer failed");
}
var = (VariableRelationContents) BufferGetBlock(buf);
TransactionIdStore(xid, &(var->lastXidData));
WriteBuffer(buf);
}
/* --------------------------------
* VariableRelationGetNextOid
* --------------------------------
@@ -449,40 +361,6 @@ GetNewTransactionId(TransactionId *xid)
prefetched_xid_count--;
}
/* ----------------
* UpdateLastCommittedXid
* ----------------
*/
void
UpdateLastCommittedXid(TransactionId xid)
{
TransactionId lastid;
/*
* we assume that spinlock OidGenLockId has been acquired prior to
* entering this function
*/
/* ----------------
* get the "last committed" transaction id from
* the variable relation page.
* ----------------
*/
VariableRelationGetLastXid(&lastid);
/* ----------------
* if the transaction id is greater than the last committed
* transaction then we update the last committed transaction
* in the variable relation.
* ----------------
*/
if (TransactionIdIsLessThan(lastid, xid))
VariableRelationPutLastXid(xid);
}
/* ----------------------------------------------------------------
* object id generation support
* ----------------------------------------------------------------