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Hope that this is valid localbuf.c version

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This commit is contained in:
Vadim B. Mikheev
2000-11-30 19:03:26 +00:00
parent b73ecebf05
commit 8247f47fc7
2 changed files with 11 additions and 59 deletions
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4
src/backend/storage/buffer/bufmgr.c
View File

@ -1,6 +1,6 @@
/*-------------------------------------------------------------------------
*
* xlog_bufmgr.c
* bufmgr.c
* buffer manager interface routines
*
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.97 2000/11/30 08:46:23 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.98 2000/11/30 19:03:25 vadim Exp $
*
*-------------------------------------------------------------------------
*/

66
src/backend/storage/buffer/localbuf.c
View File

@ -14,19 +14,10 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994-5, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/localbuf.c,v 1.36 2000/11/30 01:39:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#ifdef XLOG
#include "xlog_localbuf.c"
#else
#include <sys/types.h>
#include <sys/file.h>
#include <math.h>
@ -109,7 +100,7 @@ LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool *foundPtr)
* transaction to touch it doesn't need its contents but has not
* flushed it). if that's the case, write it out before reusing it!
*/
if (bufHdr->flags & BM_DIRTY)
if (bufHdr->flags & BM_DIRTY || bufHdr->cntxDirty)
{
Relation bufrel = RelationNodeCacheGetRelation(bufHdr->tag.rnode);
@ -136,6 +127,7 @@ LocalBufferAlloc(Relation reln, BlockNumber blockNum, bool *foundPtr)
bufHdr->tag.rnode = reln->rd_node;
bufHdr->tag.blockNum = blockNum;
bufHdr->flags &= ~BM_DIRTY;
bufHdr->cntxDirty = false;
/*
* lazy memory allocation: allocate space on first use of a buffer.
@ -189,50 +181,6 @@ WriteLocalBuffer(Buffer buffer, bool release)
return true;
}
/*
* FlushLocalBuffer -
* flushes a local buffer
*/
int
FlushLocalBuffer(Buffer buffer, bool sync, bool release)
{
int bufid;
Relation bufrel;
BufferDesc *bufHdr;
Assert(BufferIsLocal(buffer));
#ifdef LBDEBUG
fprintf(stderr, "LB FLUSH %d\n", buffer);
#endif
bufid = -(buffer + 1);
bufHdr = &LocalBufferDescriptors[bufid];
bufHdr->flags &= ~BM_DIRTY;
bufrel = RelationNodeCacheGetRelation(bufHdr->tag.rnode);
Assert(bufrel != NULL);
if (sync)
smgrflush(DEFAULT_SMGR, bufrel, bufHdr->tag.blockNum,
(char *) MAKE_PTR(bufHdr->data));
else
smgrwrite(DEFAULT_SMGR, bufrel, bufHdr->tag.blockNum,
(char *) MAKE_PTR(bufHdr->data));
LocalBufferFlushCount++;
/* drop relcache refcount incremented by RelationNodeCacheGetRelation */
RelationDecrementReferenceCount(bufrel);
if (release)
{
Assert(LocalRefCount[bufid] > 0);
LocalRefCount[bufid]--;
}
return true;
}
/*
* InitLocalBuffer -
* init the local buffer cache. Since most queries (esp. multi-user ones)
@ -273,6 +221,9 @@ InitLocalBuffer(void)
* Flush all dirty buffers in the local buffer cache at commit time.
* Since the buffer cache is only used for keeping relations visible
* during a transaction, we will not need these buffers again.
*
* Note that we have to *flush* local buffers because of them are not
* visible to checkpoint makers. But we can skip XLOG flush check.
*/
void
LocalBufferSync(void)
@ -284,7 +235,7 @@ LocalBufferSync(void)
BufferDesc *buf = &LocalBufferDescriptors[i];
Relation bufrel;
if (buf->flags & BM_DIRTY)
if (buf->flags & BM_DIRTY || buf->cntxDirty)
{
#ifdef LBDEBUG
fprintf(stderr, "LB SYNC %d\n", -i - 1);
@ -295,12 +246,14 @@ LocalBufferSync(void)
smgrwrite(DEFAULT_SMGR, bufrel, buf->tag.blockNum,
(char *) MAKE_PTR(buf->data));
smgrmarkdirty(DEFAULT_SMGR, bufrel, buf->tag.blockNum);
LocalBufferFlushCount++;
/* drop relcache refcount from RelationIdCacheGetRelation */
RelationDecrementReferenceCount(bufrel);
buf->flags &= ~BM_DIRTY;
buf->cntxDirty = false;
}
}
@ -319,10 +272,9 @@ ResetLocalBufferPool(void)
buf->tag.rnode.relNode = InvalidOid;
buf->flags &= ~BM_DIRTY;
buf->cntxDirty = false;
}
MemSet(LocalRefCount, 0, sizeof(long) * NLocBuffer);
nextFreeLocalBuf = 0;
}
#endif /* XLOG */