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92f1da4d UD |
1 | /*- |
2 | * See the file LICENSE for redistribution information. | |
3 | * | |
4 | * Copyright (c) 1996, 1997 | |
5 | * Sleepycat Software. All rights reserved. | |
6 | */ | |
7 | /* | |
8 | * Copyright (c) 1990, 1993, 1994, 1995, 1996 | |
9 | * Keith Bostic. All rights reserved. | |
10 | */ | |
11 | /* | |
12 | * Copyright (c) 1990, 1993, 1994, 1995 | |
13 | * The Regents of the University of California. All rights reserved. | |
14 | * | |
15 | * This code is derived from software contributed to Berkeley by | |
16 | * Mike Olson. | |
17 | * | |
18 | * Redistribution and use in source and binary forms, with or without | |
19 | * modification, are permitted provided that the following conditions | |
20 | * are met: | |
21 | * 1. Redistributions of source code must retain the above copyright | |
22 | * notice, this list of conditions and the following disclaimer. | |
23 | * 2. Redistributions in binary form must reproduce the above copyright | |
24 | * notice, this list of conditions and the following disclaimer in the | |
25 | * documentation and/or other materials provided with the distribution. | |
26 | * 3. All advertising materials mentioning features or use of this software | |
27 | * must display the following acknowledgement: | |
28 | * This product includes software developed by the University of | |
29 | * California, Berkeley and its contributors. | |
30 | * 4. Neither the name of the University nor the names of its contributors | |
31 | * may be used to endorse or promote products derived from this software | |
32 | * without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
35 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
36 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
37 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
38 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
39 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
40 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
41 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
42 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
43 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
44 | * SUCH DAMAGE. | |
45 | */ | |
46 | ||
47 | #include "config.h" | |
48 | ||
49 | #ifndef lint | |
af69217f | 50 | static const char sccsid[] = "@(#)bt_close.c 10.25 (Sleepycat) 1/6/98"; |
92f1da4d UD |
51 | #endif /* not lint */ |
52 | ||
53 | #ifndef NO_SYSTEM_INCLUDES | |
54 | #include <sys/types.h> | |
55 | #include <sys/mman.h> | |
56 | ||
57 | #include <errno.h> | |
58 | #include <stdio.h> | |
59 | #include <stdlib.h> | |
60 | #include <string.h> | |
61 | #include <unistd.h> | |
62 | #endif | |
63 | ||
64 | #include "db_int.h" | |
65 | #include "db_page.h" | |
66 | #include "btree.h" | |
67 | ||
68 | static void __bam_upstat __P((DB *dbp)); | |
69 | ||
70 | /* | |
71 | * __bam_close -- | |
72 | * Close a btree. | |
73 | * | |
74 | * PUBLIC: int __bam_close __P((DB *)); | |
75 | */ | |
76 | int | |
77 | __bam_close(dbp) | |
78 | DB *dbp; | |
79 | { | |
80 | BTREE *t; | |
81 | ||
82 | DEBUG_LWRITE(dbp, NULL, "bam_close", NULL, NULL, 0); | |
83 | ||
84 | t = dbp->internal; | |
85 | ||
86 | /* Update tree statistics. */ | |
87 | __bam_upstat(dbp); | |
88 | ||
89 | /* Free any allocated memory. */ | |
90 | if (t->bt_rkey.data) | |
91 | FREE(t->bt_rkey.data, t->bt_rkey.size); | |
92 | if (t->bt_rdata.data) | |
93 | FREE(t->bt_rdata.data, t->bt_rdata.ulen); | |
94 | if (t->bt_sp != t->bt_stack) | |
95 | FREE(t->bt_sp, (t->bt_esp - t->bt_sp) * sizeof(EPG)); | |
96 | ||
97 | FREE(t, sizeof(BTREE)); | |
98 | dbp->internal = NULL; | |
99 | ||
100 | return (0); | |
101 | } | |
102 | ||
103 | /* | |
104 | * __bam_sync -- | |
105 | * Sync the btree to disk. | |
106 | * | |
107 | * PUBLIC: int __bam_sync __P((DB *, int)); | |
108 | */ | |
109 | int | |
110 | __bam_sync(argdbp, flags) | |
111 | DB *argdbp; | |
112 | int flags; | |
113 | { | |
114 | DB *dbp; | |
115 | int ret; | |
116 | ||
117 | DEBUG_LWRITE(argdbp, NULL, "bam_sync", NULL, NULL, flags); | |
118 | ||
119 | /* Check for invalid flags. */ | |
120 | if ((ret = __db_syncchk(argdbp, flags)) != 0) | |
121 | return (ret); | |
122 | ||
123 | /* If it wasn't possible to modify the file, we're done. */ | |
124 | if (F_ISSET(argdbp, DB_AM_INMEM | DB_AM_RDONLY)) | |
125 | return (0); | |
126 | ||
127 | GETHANDLE(argdbp, NULL, &dbp, ret); | |
128 | ||
129 | /* Flush any dirty pages from the cache to the backing file. */ | |
130 | if ((ret = memp_fsync(dbp->mpf)) == DB_INCOMPLETE) | |
131 | ret = 0; | |
132 | ||
133 | PUTHANDLE(dbp); | |
134 | return (ret); | |
135 | } | |
136 | ||
137 | /* | |
138 | * __bam_upstat -- | |
139 | * Update tree statistics. | |
140 | */ | |
141 | static void | |
142 | __bam_upstat(dbp) | |
143 | DB *dbp; | |
144 | { | |
145 | BTREE *t; | |
146 | BTMETA *meta; | |
af69217f | 147 | DB_LOCK metalock; |
92f1da4d UD |
148 | db_pgno_t pgno; |
149 | int flags, ret; | |
150 | ||
151 | /* | |
152 | * We use a no-op log call to log the update of the statistics onto the | |
a5a0310d | 153 | * metadata page. The Db->close call isn't transaction protected to |
92f1da4d UD |
154 | * start with, and I'm not sure what undoing a statistics update means, |
155 | * anyway. | |
156 | */ | |
157 | if (F_ISSET(dbp, DB_AM_INMEM | DB_AM_RDONLY)) | |
158 | return; | |
159 | ||
92f1da4d UD |
160 | flags = 0; |
161 | pgno = PGNO_METADATA; | |
162 | ||
26b4d766 | 163 | /* Lock and retrieve the page. */ |
af69217f | 164 | if (__bam_lget(dbp, 0, pgno, DB_LOCK_WRITE, &metalock) != 0) |
26b4d766 | 165 | return; |
92f1da4d UD |
166 | if (__bam_pget(dbp, (PAGE **)&meta, &pgno, 0) == 0) { |
167 | /* Log the change. */ | |
168 | if (DB_LOGGING(dbp) && | |
169 | (ret = __db_noop_log(dbp->dbenv->lg_info, dbp->txn, | |
170 | &LSN(meta), 0)) == 0) | |
171 | goto err; | |
172 | ||
173 | /* Update the statistics. */ | |
174 | t = dbp->internal; | |
175 | __bam_add_mstat(&t->lstat, &meta->stat); | |
176 | ||
177 | flags = DB_MPOOL_DIRTY; | |
178 | } | |
179 | ||
180 | err: (void)memp_fput(dbp->mpf, (PAGE *)meta, flags); | |
af69217f | 181 | (void)__BT_LPUT(dbp, metalock); |
92f1da4d | 182 | } |