diff options
Diffstat (limited to 'db2/btree/bt_close.c')
| -rw-r--r-- | db2/btree/bt_close.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/db2/btree/bt_close.c b/db2/btree/bt_close.c new file mode 100644 index 0000000000..4e80634e86 --- /dev/null +++ b/db2/btree/bt_close.c @@ -0,0 +1,184 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997 + * Sleepycat Software. All rights reserved. + */ +/* + * Copyright (c) 1990, 1993, 1994, 1995, 1996 + * Keith Bostic. All rights reserved. + */ +/* + * Copyright (c) 1990, 1993, 1994, 1995 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Mike Olson. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "config.h" + +#ifndef lint +static const char sccsid[] = "@(#)bt_close.c 10.22 (Sleepycat) 8/23/97"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> +#include <sys/mman.h> + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#endif + +#include "db_int.h" +#include "db_page.h" +#include "btree.h" + +static void __bam_upstat __P((DB *dbp)); + +/* + * __bam_close -- + * Close a btree. + * + * PUBLIC: int __bam_close __P((DB *)); + */ +int +__bam_close(dbp) + DB *dbp; +{ + BTREE *t; + + DEBUG_LWRITE(dbp, NULL, "bam_close", NULL, NULL, 0); + + t = dbp->internal; + + /* Update tree statistics. */ + __bam_upstat(dbp); + + /* Free any allocated memory. */ + if (t->bt_rkey.data) + FREE(t->bt_rkey.data, t->bt_rkey.size); + if (t->bt_rdata.data) + FREE(t->bt_rdata.data, t->bt_rdata.ulen); + if (t->bt_sp != t->bt_stack) + FREE(t->bt_sp, (t->bt_esp - t->bt_sp) * sizeof(EPG)); + + FREE(t, sizeof(BTREE)); + dbp->internal = NULL; + + return (0); +} + +/* + * __bam_sync -- + * Sync the btree to disk. + * + * PUBLIC: int __bam_sync __P((DB *, int)); + */ +int +__bam_sync(argdbp, flags) + DB *argdbp; + int flags; +{ + DB *dbp; + int ret; + + DEBUG_LWRITE(argdbp, NULL, "bam_sync", NULL, NULL, flags); + + /* Check for invalid flags. */ + if ((ret = __db_syncchk(argdbp, flags)) != 0) + return (ret); + + /* If it wasn't possible to modify the file, we're done. */ + if (F_ISSET(argdbp, DB_AM_INMEM | DB_AM_RDONLY)) + return (0); + + GETHANDLE(argdbp, NULL, &dbp, ret); + + /* Flush any dirty pages from the cache to the backing file. */ + if ((ret = memp_fsync(dbp->mpf)) == DB_INCOMPLETE) + ret = 0; + + PUTHANDLE(dbp); + return (ret); +} + +/* + * __bam_upstat -- + * Update tree statistics. + */ +static void +__bam_upstat(dbp) + DB *dbp; +{ + BTREE *t; + BTMETA *meta; + DB_LOCK mlock; + db_pgno_t pgno; + int flags, ret; + + /* + * We use a no-op log call to log the update of the statistics onto the + * metadata page. The dbp->close() call isn't transaction protected to + * start with, and I'm not sure what undoing a statistics update means, + * anyway. + */ + if (F_ISSET(dbp, DB_AM_INMEM | DB_AM_RDONLY)) + return; + + /* Lock the page. */ + if (__bam_lget(dbp, 0, pgno, DB_LOCK_WRITE, &mlock) != 0) + return; + + flags = 0; + pgno = PGNO_METADATA; + + /* Get the page. */ + if (__bam_pget(dbp, (PAGE **)&meta, &pgno, 0) == 0) { + /* Log the change. */ + if (DB_LOGGING(dbp) && + (ret = __db_noop_log(dbp->dbenv->lg_info, dbp->txn, + &LSN(meta), 0)) == 0) + goto err; + + /* Update the statistics. */ + t = dbp->internal; + __bam_add_mstat(&t->lstat, &meta->stat); + + flags = DB_MPOOL_DIRTY; + } + +err: (void)memp_fput(dbp->mpf, (PAGE *)meta, flags); + (void)__BT_LPUT(dbp, mlock); +} |