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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)mp_fset.c 10.15 (Sleepycat) 4/26/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#endif
#include "db_int.h"
#include "shqueue.h"
#include "db_shash.h"
#include "mp.h"
#include "common_ext.h"
/*
* memp_fset --
* Mpool page set-flag routine.
*/
int
memp_fset(dbmfp, pgaddr, flags)
DB_MPOOLFILE *dbmfp;
void *pgaddr;
u_int32_t flags;
{
BH *bhp;
DB_MPOOL *dbmp;
MPOOL *mp;
int ret;
dbmp = dbmfp->dbmp;
mp = dbmp->mp;
/* Validate arguments. */
if (flags == 0)
return (__db_ferr(dbmp->dbenv, "memp_fset", 1));
if ((ret = __db_fchk(dbmp->dbenv, "memp_fset", flags,
DB_MPOOL_DIRTY | DB_MPOOL_CLEAN | DB_MPOOL_DISCARD)) != 0)
return (ret);
if ((ret = __db_fcchk(dbmp->dbenv, "memp_fset",
flags, DB_MPOOL_CLEAN, DB_MPOOL_DIRTY)) != 0)
return (ret);
if (LF_ISSET(DB_MPOOL_DIRTY) && F_ISSET(dbmfp, MP_READONLY)) {
__db_err(dbmp->dbenv,
"%s: dirty flag set for readonly file page",
__memp_fn(dbmfp));
return (EACCES);
}
/* Convert the page address to a buffer header. */
bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));
LOCKREGION(dbmp);
if (LF_ISSET(DB_MPOOL_CLEAN) && F_ISSET(bhp, BH_DIRTY)) {
++mp->stat.st_page_clean;
--mp->stat.st_page_dirty;
F_CLR(bhp, BH_DIRTY);
}
if (LF_ISSET(DB_MPOOL_DIRTY) && !F_ISSET(bhp, BH_DIRTY)) {
--mp->stat.st_page_clean;
++mp->stat.st_page_dirty;
F_SET(bhp, BH_DIRTY);
}
if (LF_ISSET(DB_MPOOL_DISCARD))
F_SET(bhp, BH_DISCARD);
UNLOCKREGION(dbmp);
return (0);
}
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