2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94";
35 #endif /* LIBC_SCCS and not lint */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include "namespace.h"
40 #include <sys/param.h>
47 #include "un-namespace.h"
52 static int bt_meta(BTREE *);
55 * BT_CLOSE -- Close a btree.
58 * dbp: pointer to access method
61 * RET_ERROR, RET_SUCCESS
71 /* Toss any page pinned across calls. */
72 if (t->bt_pinned != NULL) {
73 mpool_put(t->bt_mp, t->bt_pinned, 0);
78 if (__bt_sync(dbp, 0) == RET_ERROR)
81 /* Close the memory pool. */
82 if (mpool_close(t->bt_mp) == RET_ERROR)
85 /* Free random memory. */
86 if (t->bt_cursor.key.data != NULL) {
87 free(t->bt_cursor.key.data);
88 t->bt_cursor.key.size = 0;
89 t->bt_cursor.key.data = NULL;
91 if (t->bt_rkey.data) {
92 free(t->bt_rkey.data);
94 t->bt_rkey.data = NULL;
96 if (t->bt_rdata.data) {
97 free(t->bt_rdata.data);
99 t->bt_rdata.data = NULL;
105 return (_close(fd) ? RET_ERROR : RET_SUCCESS);
109 * BT_SYNC -- sync the btree to disk.
112 * dbp: pointer to access method
115 * RET_SUCCESS, RET_ERROR.
118 __bt_sync(const DB *dbp, u_int flags)
125 /* Toss any page pinned across calls. */
126 if (t->bt_pinned != NULL) {
127 mpool_put(t->bt_mp, t->bt_pinned, 0);
131 /* Sync doesn't currently take any flags. */
137 if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED))
138 return (RET_SUCCESS);
140 if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
143 if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
144 F_CLR(t, B_MODIFIED);
150 * BT_META -- write the tree meta data to disk.
156 * RET_ERROR, RET_SUCCESS
164 if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
167 /* Fill in metadata. */
168 m.magic = BTREEMAGIC;
169 m.version = BTREEVERSION;
170 m.psize = t->bt_psize;
172 m.nrecs = t->bt_nrecs;
173 m.flags = F_ISSET(t, SAVEMETA);
175 memmove(p, &m, sizeof(BTMETA));
176 mpool_put(t->bt_mp, p, MPOOL_DIRTY);
177 return (RET_SUCCESS);