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36 * $FreeBSD: src/lib/libc/db/btree/bt_close.c,v 1.5 2000/01/27 23:06:05 jasone Exp $
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)bt_close.c 8.7 (Berkeley) 8/17/94";
41 #endif /* LIBC_SCCS and not lint */
43 #include <sys/param.h>
54 static int bt_meta __P((BTREE *));
57 * BT_CLOSE -- Close a btree.
60 * dbp: pointer to access method
63 * RET_ERROR, RET_SUCCESS
74 /* Toss any page pinned across calls. */
75 if (t->bt_pinned != NULL) {
76 mpool_put(t->bt_mp, t->bt_pinned, 0);
81 if (__bt_sync(dbp, 0) == RET_ERROR)
84 /* Close the memory pool. */
85 if (mpool_close(t->bt_mp) == RET_ERROR)
88 /* Free random memory. */
89 if (t->bt_cursor.key.data != NULL) {
90 free(t->bt_cursor.key.data);
91 t->bt_cursor.key.size = 0;
92 t->bt_cursor.key.data = NULL;
94 if (t->bt_rkey.data) {
95 free(t->bt_rkey.data);
97 t->bt_rkey.data = NULL;
99 if (t->bt_rdata.data) {
100 free(t->bt_rdata.data);
101 t->bt_rdata.size = 0;
102 t->bt_rdata.data = NULL;
108 return (_close(fd) ? RET_ERROR : RET_SUCCESS);
112 * BT_SYNC -- sync the btree to disk.
115 * dbp: pointer to access method
118 * RET_SUCCESS, RET_ERROR.
121 __bt_sync(dbp, flags)
130 /* Toss any page pinned across calls. */
131 if (t->bt_pinned != NULL) {
132 mpool_put(t->bt_mp, t->bt_pinned, 0);
136 /* Sync doesn't currently take any flags. */
142 if (F_ISSET(t, B_INMEM | B_RDONLY) || !F_ISSET(t, B_MODIFIED))
143 return (RET_SUCCESS);
145 if (F_ISSET(t, B_METADIRTY) && bt_meta(t) == RET_ERROR)
148 if ((status = mpool_sync(t->bt_mp)) == RET_SUCCESS)
149 F_CLR(t, B_MODIFIED);
155 * BT_META -- write the tree meta data to disk.
161 * RET_ERROR, RET_SUCCESS
170 if ((p = mpool_get(t->bt_mp, P_META, 0)) == NULL)
173 /* Fill in metadata. */
174 m.magic = BTREEMAGIC;
175 m.version = BTREEVERSION;
176 m.psize = t->bt_psize;
178 m.nrecs = t->bt_nrecs;
179 m.flags = F_ISSET(t, SAVEMETA);
181 memmove(p, &m, sizeof(BTMETA));
182 mpool_put(t->bt_mp, p, MPOOL_DIRTY);
183 return (RET_SUCCESS);