mp_fset.c

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/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 1997, 1998, 1999, 2000
 *      Sleepycat Software.  All rights reserved.
 */
#include "config.h"

#ifndef lint
static const char revid[] = "$Id: mp__fset_8c-source.html,v 1.1 2008/06/08 10:20:47 sebdiaz Exp $";
#endif /* not lint */

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <errno.h>
#endif

#ifdef  HAVE_RPC
#include "db_server.h"
#endif

#include "db_int.h"
#include "db_shash.h"
#include "mp.h"

#ifdef HAVE_RPC
#include "gen_client_ext.h"
#include "rpc_client_ext.h"
#endif

/*
 * CDB_memp_fset --
 *      Mpool page set-flag routine.
 */
int
CDB_memp_fset(dbmfp, pgaddr, flags)
        DB_MPOOLFILE *dbmfp;
        void *pgaddr;
        u_int32_t flags;
{
        BH *bhp;
        DB_ENV *dbenv;
        DB_MPOOL *dbmp;
        MPOOL *c_mp, *mp;
        int ret;

        dbmp = dbmfp->dbmp;
        dbenv = dbmp->dbenv;
        mp = dbmp->reginfo[0].primary;

#ifdef HAVE_RPC
        if (F_ISSET(dbenv, DB_ENV_RPCCLIENT))
                return (__dbcl_memp_fset(dbmfp, pgaddr, flags));
#endif

        PANIC_CHECK(dbenv);

        /* Validate arguments. */
        if (flags == 0)
                return (CDB___db_ferr(dbenv, "CDB_memp_fset", 1));

        if ((ret = CDB___db_fchk(dbenv, "CDB_memp_fset", flags,
            DB_MPOOL_DIRTY | DB_MPOOL_CLEAN | DB_MPOOL_DISCARD)) != 0)
                return (ret);
        if ((ret = CDB___db_fcchk(dbenv, "CDB_memp_fset",
            flags, DB_MPOOL_CLEAN, DB_MPOOL_DIRTY)) != 0)
                return (ret);

        if (LF_ISSET(DB_MPOOL_DIRTY) && F_ISSET(dbmfp, MP_READONLY)) {
                CDB___db_err(dbenv, "%s: dirty flag set for readonly file page",
                    CDB___memp_fn(dbmfp));
                return (EACCES);
        }

        /* Convert the page address to a buffer header. */
        bhp = (BH *)((u_int8_t *)pgaddr - SSZA(BH, buf));

        /* Convert the buffer header to a cache. */
        c_mp = BH_TO_CACHE(dbmp, bhp);

        R_LOCK(dbenv, dbmp->reginfo);

        if (LF_ISSET(DB_MPOOL_CLEAN) && F_ISSET(bhp, BH_DIRTY)) {
                ++c_mp->stat.st_page_clean;
                --c_mp->stat.st_page_dirty;
                F_CLR(bhp, BH_DIRTY);
        }
        if (LF_ISSET(DB_MPOOL_DIRTY) && !F_ISSET(bhp, BH_DIRTY)) {
                --c_mp->stat.st_page_clean;
                ++c_mp->stat.st_page_dirty;
                F_SET(bhp, BH_DIRTY);
        }
        if (LF_ISSET(DB_MPOOL_DISCARD))
                F_SET(bhp, BH_DISCARD);

        R_UNLOCK(dbenv, dbmp->reginfo);
        return (0);
}

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