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Refactor XLogOpenRelation() and XLogReadBuffer() in preparation for relation

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forks. XLogOpenRelation() and the associated light-weight relation cache in
xlogutils.c is gone, and XLogReadBuffer() now takes a RelFileNode as argument,
instead of Relation.

For functions that still need a Relation struct during WAL replay, there's a
new function called CreateFakeRelcacheEntry() that returns a fake entry like
XLogOpenRelation() used to.
This commit is contained in:
Heikki Linnakangas
2008-06-12 09:12:31 +00:00
parent c4f2a0458d
commit a213f1ee6c
20 changed files with 295 additions and 427 deletions
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8
src/backend/storage/buffer/localbuf.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.79 2008/01/01 19:45:51 momjian Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.80 2008/06/12 09:12:31 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@ -61,7 +61,7 @@ static Block GetLocalBufferStorage(void);
* (hence, usage_count is always advanced).
*/
BufferDesc *
LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool *foundPtr)
LocalBufferAlloc(SMgrRelation smgr, BlockNumber blockNum, bool *foundPtr)
{
BufferTag newTag; /* identity of requested block */
LocalBufferLookupEnt *hresult;
@ -70,7 +70,7 @@ LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool *foundPtr)
int trycounter;
bool found;
INIT_BUFFERTAG(newTag, reln, blockNum);
INIT_BUFFERTAG(newTag, smgr->smgr_rnode, blockNum);
/* Initialize local buffers if first request in this session */
if (LocalBufHash == NULL)
@ -87,7 +87,7 @@ LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool *foundPtr)
Assert(BUFFERTAGS_EQUAL(bufHdr->tag, newTag));
#ifdef LBDEBUG
fprintf(stderr, "LB ALLOC (%u,%d) %d\n",
RelationGetRelid(reln), blockNum, -b - 1);
smgr->smgr_rnode.relNode, blockNum, -b - 1);
#endif
/* this part is equivalent to PinBuffer for a shared buffer */
if (LocalRefCount[b] == 0)