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104 lines
1.8 KiB
C
104 lines
1.8 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1999-2005
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* Sleepycat Software. All rights reserved.
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*
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* $Id: hash_meta.c,v 12.1 2005/06/16 20:22:52 bostic Exp $
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*/
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#include "db_config.h"
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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_page.h"
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#include "dbinc/db_shash.h"
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#include "dbinc/hash.h"
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#include "dbinc/lock.h"
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#include "dbinc/mp.h"
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/*
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* Acquire the meta-data page.
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*
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* PUBLIC: int __ham_get_meta __P((DBC *));
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*/
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int
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__ham_get_meta(dbc)
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DBC *dbc;
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{
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DB *dbp;
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DB_MPOOLFILE *mpf;
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HASH *hashp;
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HASH_CURSOR *hcp;
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int ret;
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dbp = dbc->dbp;
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mpf = dbp->mpf;
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hashp = dbp->h_internal;
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hcp = (HASH_CURSOR *)dbc->internal;
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if ((ret = __db_lget(dbc, 0,
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hashp->meta_pgno, DB_LOCK_READ, 0, &hcp->hlock)) != 0)
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return (ret);
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if ((ret = __memp_fget(mpf,
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&hashp->meta_pgno, DB_MPOOL_CREATE, &(hcp->hdr))) != 0)
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(void)__LPUT(dbc, hcp->hlock);
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return (ret);
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}
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/*
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* Release the meta-data page.
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*
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* PUBLIC: int __ham_release_meta __P((DBC *));
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*/
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int
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__ham_release_meta(dbc)
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DBC *dbc;
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{
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DB_MPOOLFILE *mpf;
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HASH_CURSOR *hcp;
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mpf = dbc->dbp->mpf;
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hcp = (HASH_CURSOR *)dbc->internal;
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if (hcp->hdr)
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(void)__memp_fput(mpf, hcp->hdr,
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F_ISSET(hcp, H_DIRTY) ? DB_MPOOL_DIRTY : 0);
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hcp->hdr = NULL;
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F_CLR(hcp, H_DIRTY);
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return (__TLPUT(dbc, hcp->hlock));
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}
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/*
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* Mark the meta-data page dirty.
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*
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* PUBLIC: int __ham_dirty_meta __P((DBC *));
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*/
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int
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__ham_dirty_meta(dbc)
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DBC *dbc;
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{
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DB *dbp;
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HASH *hashp;
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HASH_CURSOR *hcp;
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int ret;
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dbp = dbc->dbp;
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hashp = dbp->h_internal;
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hcp = (HASH_CURSOR *)dbc->internal;
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ret = 0;
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ret = __db_lget(dbc, LCK_COUPLE,
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hashp->meta_pgno, DB_LOCK_WRITE, 0, &hcp->hlock);
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if (ret == 0)
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F_SET(hcp, H_DIRTY);
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return (ret);
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}
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