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I posted some bufmgr cleanup a few weeks ago, but it conflicted with

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some concurrent changes Jan was making to the bufmgr. Here's an
updated version of the patch -- it should apply cleanly to CVS
HEAD and passes the regression tests.

This patch makes the following changes:

     - remove the UnlockAndReleaseBuffer() and UnlockAndWriteBuffer()
       macros, and replace uses of them with calls to the appropriate
       functions.

     - remove a bunch of #ifdef BMTRACE code: it is ugly & broken
       (i.e. it doesn't compile)

     - make BufferReplace() return a bool, not an int

     - cleanup some logic in bufmgr.c; should be functionality
       equivalent to the previous code, just cleaner now

     - remove the BM_PRIVATE flag as it is unused

     - improve a few comments, etc.
This commit is contained in:
Neil Conway
2003-12-14 00:34:47 +00:00
parent 81e9455150
commit fef0c8345a
10 changed files with 134 additions and 323 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
src/backend/access/heap/heapam.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.158 2003/11/29 19:51:40 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.159 2003/12/14 00:34:47 neilc Exp $
*
*
* INTERFACE ROUTINES
@@ -2110,7 +2110,8 @@ heap_xlog_clean(bool redo, XLogRecPtr lsn, XLogRecord *record)
if (XLByteLE(lsn, PageGetLSN(page)))
{
UnlockAndReleaseBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
return;
}
@@ -2135,7 +2136,8 @@ heap_xlog_clean(bool redo, XLogRecPtr lsn, XLogRecord *record)
PageSetLSN(page, lsn);
PageSetSUI(page, ThisStartUpID); /* prev sui */
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
}
static void
@@ -2170,7 +2172,8 @@ heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
{
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
UnlockAndReleaseBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
return;
}
}
@@ -2199,7 +2202,8 @@ heap_xlog_delete(bool redo, XLogRecPtr lsn, XLogRecord *record)
htup->t_ctid = xlrec->target.tid;
PageSetLSN(page, lsn);
PageSetSUI(page, ThisStartUpID);
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
return;
}
@@ -2249,7 +2253,8 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
UnlockAndReleaseBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
return;
}
@@ -2282,7 +2287,8 @@ heap_xlog_insert(bool redo, XLogRecPtr lsn, XLogRecord *record)
elog(PANIC, "heap_insert_redo: failed to add tuple");
PageSetLSN(page, lsn);
PageSetSUI(page, ThisStartUpID); /* prev sui */
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
return;
}
@@ -2332,7 +2338,8 @@ heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record, bool move)
{
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
UnlockAndReleaseBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
if (samepage)
return;
goto newt;
@@ -2378,7 +2385,8 @@ heap_xlog_update(bool redo, XLogRecPtr lsn, XLogRecord *record, bool move)
goto newsame;
PageSetLSN(page, lsn);
PageSetSUI(page, ThisStartUpID);
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
goto newt;
}
@@ -2421,7 +2429,8 @@ newsame:;
if (XLByteLE(lsn, PageGetLSN(page))) /* changes are applied */
{
UnlockAndReleaseBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
ReleaseBuffer(buffer);
return;
}
@@ -2474,7 +2483,8 @@ newsame:;
elog(PANIC, "heap_update_redo: failed to add tuple");
PageSetLSN(page, lsn);
PageSetSUI(page, ThisStartUpID); /* prev sui */
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
return;
}
@@ -2523,7 +2533,8 @@ _heap_unlock_tuple(void *data)
elog(PANIC, "_heap_unlock_tuple: invalid xmax in rollback");
htup->t_infomask &= ~HEAP_XMAX_UNLOGGED;
htup->t_infomask |= HEAP_XMAX_INVALID;
UnlockAndWriteBuffer(buffer);
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
WriteBuffer(buffer);
return;
}