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90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996-2002
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: mp_fset.c,v 11.25 2002/05/03 15:21:17 bostic Exp $";
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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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#endif
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#include "db_int.h"
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#include "dbinc/db_shash.h"
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#include "dbinc/mp.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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* PUBLIC: int __memp_fset __P((DB_MPOOLFILE *, void *, u_int32_t));
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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_ENV *dbenv;
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DB_MPOOL *dbmp;
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DB_MPOOL_HASH *hp;
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MPOOL *c_mp;
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u_int32_t n_cache;
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int ret;
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dbmp = dbmfp->dbmp;
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dbenv = dbmp->dbenv;
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PANIC_CHECK(dbenv);
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/* Validate arguments. */
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if (flags == 0)
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return (__db_ferr(dbenv, "memp_fset", 1));
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if ((ret = __db_fchk(dbenv, "memp_fset", flags,
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DB_MPOOL_CLEAN | DB_MPOOL_DIRTY | DB_MPOOL_DISCARD)) != 0)
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return (ret);
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if ((ret = __db_fcchk(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(dbenv, "%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 and hash bucket. */
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bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));
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n_cache = NCACHE(dbmp->reginfo[0].primary, bhp->mf_offset, bhp->pgno);
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c_mp = dbmp->reginfo[n_cache].primary;
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hp = R_ADDR(&dbmp->reginfo[n_cache], c_mp->htab);
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hp = &hp[NBUCKET(c_mp, bhp->mf_offset, bhp->pgno)];
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MUTEX_LOCK(dbenv, &hp->hash_mutex);
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/* Set/clear the page bits. */
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if (LF_ISSET(DB_MPOOL_CLEAN) &&
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F_ISSET(bhp, BH_DIRTY) && !F_ISSET(bhp, BH_DIRTY_CREATE)) {
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DB_ASSERT(hp->hash_page_dirty != 0);
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--hp->hash_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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++hp->hash_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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MUTEX_UNLOCK(dbenv, &hp->hash_mutex);
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return (0);
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}
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