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84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997, 1998
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)mp_fset.c 10.16 (Sleepycat) 9/27/98";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_shash.h"
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#include "mp.h"
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#include "common_ext.h"
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/*
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* memp_fset --
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* Mpool page set-flag routine.
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*/
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int
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memp_fset(dbmfp, pgaddr, flags)
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DB_MPOOLFILE *dbmfp;
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void *pgaddr;
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u_int32_t flags;
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{
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BH *bhp;
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DB_MPOOL *dbmp;
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MPOOL *mp;
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int ret;
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dbmp = dbmfp->dbmp;
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mp = dbmp->mp;
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MP_PANIC_CHECK(dbmp);
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/* Validate arguments. */
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if (flags == 0)
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return (__db_ferr(dbmp->dbenv, "memp_fset", 1));
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if ((ret = __db_fchk(dbmp->dbenv, "memp_fset", flags,
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DB_MPOOL_DIRTY | DB_MPOOL_CLEAN | DB_MPOOL_DISCARD)) != 0)
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return (ret);
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if ((ret = __db_fcchk(dbmp->dbenv, "memp_fset",
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flags, DB_MPOOL_CLEAN, DB_MPOOL_DIRTY)) != 0)
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return (ret);
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if (LF_ISSET(DB_MPOOL_DIRTY) && F_ISSET(dbmfp, MP_READONLY)) {
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__db_err(dbmp->dbenv,
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"%s: dirty flag set for readonly file page",
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__memp_fn(dbmfp));
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return (EACCES);
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}
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/* Convert the page address to a buffer header. */
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bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));
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LOCKREGION(dbmp);
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if (LF_ISSET(DB_MPOOL_CLEAN) && F_ISSET(bhp, BH_DIRTY)) {
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++mp->stat.st_page_clean;
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--mp->stat.st_page_dirty;
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F_CLR(bhp, BH_DIRTY);
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}
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if (LF_ISSET(DB_MPOOL_DIRTY) && !F_ISSET(bhp, BH_DIRTY)) {
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--mp->stat.st_page_clean;
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++mp->stat.st_page_dirty;
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F_SET(bhp, BH_DIRTY);
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}
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if (LF_ISSET(DB_MPOOL_DISCARD))
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F_SET(bhp, BH_DISCARD);
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UNLOCKREGION(dbmp);
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return (0);
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}
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