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Dump/read non-default GUC values for use by exec'ed backends, for Win32.

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This commit is contained in:
Bruce Momjian
2003-05-02 21:52:42 +00:00
parent de28dc9a04
commit fb1f7ccec5
7 changed files with 91 additions and 30 deletions
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70
src/backend/access/transam/clog.c
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@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/clog.c,v 1.12 2003/04/14 17:31:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/clog.c,v 1.13 2003/05/02 21:52:42 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -157,7 +157,7 @@ static ClogCtlData *ClogCtl = NULL;
* The value is automatically inherited by backends via fork, and
* doesn't need to be in shared memory.
*/
static LWLockId ClogBufferLocks[NUM_CLOG_BUFFERS]; /* Per-buffer I/O locks */
static LWLockId *ClogBufferLocks; /* Per-buffer I/O locks */
/*
* ClogDir is set during CLOGShmemInit and does not change thereafter.
@ -271,41 +271,67 @@ TransactionIdGetStatus(TransactionId xid)
/*
* Initialization of shared memory for CLOG
*/
int
CLOGShmemSize(void)
{
return MAXALIGN(sizeof(ClogCtlData) + CLOG_BLCKSZ * NUM_CLOG_BUFFERS);
return MAXALIGN(sizeof(ClogCtlData) + CLOG_BLCKSZ * NUM_CLOG_BUFFERS)
#ifdef EXEC_BACKEND
+ MAXALIGN(NUM_CLOG_BUFFERS * sizeof(LWLockId))
#endif
;
}
void
CLOGShmemInit(void)
{
bool found;
char *bufptr;
int slotno;
/* Handle ClogCtl */
/* this must agree with space requested by CLOGShmemSize() */
ClogCtl = (ClogCtlData *)
ShmemInitStruct("CLOG Ctl",
MAXALIGN(sizeof(ClogCtlData) +
CLOG_BLCKSZ * NUM_CLOG_BUFFERS),
&found);
Assert(!found);
ClogCtl = (ClogCtlData *) ShmemInitStruct("CLOG Ctl",
MAXALIGN(sizeof(ClogCtlData) +
CLOG_BLCKSZ * NUM_CLOG_BUFFERS), &found);
memset(ClogCtl, 0, sizeof(ClogCtlData));
bufptr = ((char *) ClogCtl) + sizeof(ClogCtlData);
for (slotno = 0; slotno < NUM_CLOG_BUFFERS; slotno++)
if (!IsUnderPostmaster)
/* Initialize ClogCtl shared memory area */
{
ClogCtl->page_buffer[slotno] = bufptr;
ClogCtl->page_status[slotno] = CLOG_PAGE_EMPTY;
ClogBufferLocks[slotno] = LWLockAssign();
bufptr += CLOG_BLCKSZ;
}
char *bufptr;
/* ClogCtl->latest_page_number will be set later */
Assert(!found);
memset(ClogCtl, 0, sizeof(ClogCtlData));
bufptr = (char *)ClogCtl + sizeof(ClogCtlData);
for (slotno = 0; slotno < NUM_CLOG_BUFFERS; slotno++)
{
ClogCtl->page_buffer[slotno] = bufptr;
ClogCtl->page_status[slotno] = CLOG_PAGE_EMPTY;
bufptr += CLOG_BLCKSZ;
}
/* ClogCtl->latest_page_number will be set later */
}
else
Assert(found);
/* Handle ClogBufferLocks */
#ifdef EXEC_BACKEND
ClogBufferLocks = (LWLockId *) ShmemInitStruct("CLOG Buffer Locks",
NUM_CLOG_BUFFERS * sizeof(LWLockId), &found);
Assert((!found && !IsUnderPostmaster) || (found && IsUnderPostmaster));
#else
ClogBufferLocks = malloc(NUM_CLOG_BUFFERS * sizeof(LWLockId));
Assert(ClogBufferLocks);
#endif
if (!IsUnderPostmaster)
for (slotno = 0; slotno < NUM_CLOG_BUFFERS; slotno++)
ClogBufferLocks[slotno] = LWLockAssign();
/* Init CLOG directory path */
snprintf(ClogDir, MAXPGPATH, "%s/pg_clog", DataDir);