2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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14 * notice, this list of conditions and the following disclaimer.
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22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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35 #if defined(LIBC_SCCS) && !defined(lint)
36 static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94";
37 #endif /* LIBC_SCCS and not lint */
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include "namespace.h"
42 #include <sys/param.h>
49 #include "un-namespace.h"
54 static int bt_meta(BTREE *);
57 * BT_CLOSE -- Close a btree.
60 * dbp: pointer to access method
63 * RET_ERROR, RET_SUCCESS
73 /* Toss any page pinned across calls. */
74 if (t->bt_pinned != NULL) {
75 mpool_put(t->bt_mp, t->bt_pinned, 0);
80 if (__bt_sync(dbp, 0) == RET_ERROR)
83 /* Close the memory pool. */
84 if (mpool_close(t->bt_mp) == RET_ERROR)
87 /* Free random memory. */
88 if (t->bt_cursor.key.data != NULL) {
89 free(t->bt_cursor.key.data);
90 t->bt_cursor.key.size = 0;
91 t->bt_cursor.key.data = NULL;
93 if (t->bt_rkey.data) {
94 free(t->bt_rkey.data);
96 t->bt_rkey.data = NULL;
98 if (t->bt_rdata.data) {
99 free(t->bt_rdata.data);
100 t->bt_rdata.size = 0;
101 t->bt_rdata.data = NULL;
107 return (_close(fd) ? RET_ERROR : RET_SUCCESS);
111 * BT_SYNC -- sync the btree to disk.
114 * dbp: pointer to access method
117 * RET_SUCCESS, RET_ERROR.
120 __bt_sync(const DB *dbp, u_int flags)
127 /* Toss any page pinned across calls. */
128 if (t->bt_pinned != NULL) {
129 mpool_put(t->bt_mp, t->bt_pinned, 0);
133 /* Sync doesn't currently take any flags. */
139 if (F_ISSET(t, B_INMEM | B_RDONLY) ||
140 !F_ISSET(t, B_MODIFIED | B_METADIRTY))
141 return (RET_SUCCESS);
143 if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
146 if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
147 F_CLR(t, B_MODIFIED);
153 * BT_META -- write the tree meta data to disk.
159 * RET_ERROR, RET_SUCCESS
167 if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
170 /* Fill in metadata. */
171 m.magic = BTREEMAGIC;
172 m.version = BTREEVERSION;
173 m.psize = t->bt_psize;
175 m.nrecs = t->bt_nrecs;
176 m.flags = F_ISSET(t, SAVEMETA);
178 memmove(p, &m, sizeof(BTMETA));
179 mpool_put(t->bt_mp, p, MPOOL_DIRTY);
180 return (RET_SUCCESS);