source: rtems-libbsd/freebsd-userspace/lib/libc/db/recno/rec_close.c @ 99dc0d7

4.1155-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since 99dc0d7 was 99dc0d7, checked in by Jennifer Averett <jennifer.averett@…>, on Sep 13, 2012 at 7:03:35 PM

rec_close.c: Removed usage of munmap() method.

Note that there is a define MMAP_NOT_AVAILABLE that when NOT
defined results in mmap not being called but munmap is still
called. A comment was also added to our notes about this.

  • Property mode set to 100644
File size: 4.8 KB
Line 
1#include "port_before.h"
2
3/*-
4 * Copyright (c) 1990, 1993, 1994
5 *      The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char sccsid[] = "@(#)rec_close.c 8.6 (Berkeley) 8/18/94";
34#endif /* LIBC_SCCS and not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include "namespace.h"
39#include <sys/types.h>
40#include <sys/uio.h>
41#include <sys/mman.h>
42
43#include <errno.h>
44#include <limits.h>
45#include <stdio.h>
46#include <unistd.h>
47#include "un-namespace.h"
48
49#include <db.h>
50#include "recno.h"
51
52/*
53 * __REC_CLOSE -- Close a recno tree.
54 *
55 * Parameters:
56 *      dbp:    pointer to access method
57 *
58 * Returns:
59 *      RET_ERROR, RET_SUCCESS
60 */
61int
62__rec_close(DB *dbp)
63{
64        BTREE *t;
65        int status;
66
67        t = dbp->internal;
68
69        /* Toss any page pinned across calls. */
70        if (t->bt_pinned != NULL) {
71                mpool_put(t->bt_mp, t->bt_pinned, 0);
72                t->bt_pinned = NULL;
73        }
74
75        if (__rec_sync(dbp, 0) == RET_ERROR)
76                return (RET_ERROR);
77
78        /* Committed to closing. */
79        status = RET_SUCCESS;
80
81#ifndef __rtems__   /* XXX */
82        if (F_ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize))
83                status = RET_ERROR;
84#endif
85        if (!F_ISSET(t, R_INMEM)) {
86                if (F_ISSET(t, R_CLOSEFP)) {
87                        if (fclose(t->bt_rfp))
88                                status = RET_ERROR;
89                } else {
90                        if (_close(t->bt_rfd))
91                                status = RET_ERROR;
92                }
93        }
94
95        if (__bt_close(dbp) == RET_ERROR)
96                status = RET_ERROR;
97
98        return (status);
99}
100
101/*
102 * __REC_SYNC -- sync the recno tree to disk.
103 *
104 * Parameters:
105 *      dbp:    pointer to access method
106 *
107 * Returns:
108 *      RET_SUCCESS, RET_ERROR.
109 */
110int
111__rec_sync(const DB *dbp, u_int flags)
112{
113        struct iovec iov[2];
114        BTREE *t;
115        DBT data, key;
116        off_t off;
117        recno_t scursor, trec;
118        int status;
119
120        t = dbp->internal;
121
122        /* Toss any page pinned across calls. */
123        if (t->bt_pinned != NULL) {
124                mpool_put(t->bt_mp, t->bt_pinned, 0);
125                t->bt_pinned = NULL;
126        }
127
128        if (flags == R_RECNOSYNC)
129                return (__bt_sync(dbp, 0));
130
131        if (F_ISSET(t, R_RDONLY | R_INMEM) || !F_ISSET(t, R_MODIFIED))
132                return (RET_SUCCESS);
133
134        /* Read any remaining records into the tree. */
135        if (!F_ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
136                return (RET_ERROR);
137
138        /* Rewind the file descriptor. */
139        if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0)
140                return (RET_ERROR);
141
142        /* Save the cursor. */
143        scursor = t->bt_cursor.rcursor;
144
145        key.size = sizeof(recno_t);
146        key.data = &trec;
147
148        if (F_ISSET(t, R_FIXLEN)) {
149                /*
150                 * We assume that fixed length records are all fixed length.
151                 * Any that aren't are either EINVAL'd or corrected by the
152                 * record put code.
153                 */
154                status = (dbp->seq)(dbp, &key, &data, R_FIRST);
155                while (status == RET_SUCCESS) {
156                        if (_write(t->bt_rfd, data.data, data.size) !=
157                            (ssize_t)data.size)
158                                return (RET_ERROR);
159                        status = (dbp->seq)(dbp, &key, &data, R_NEXT);
160                }
161        } else {
162                iov[1].iov_base = &t->bt_bval;
163                iov[1].iov_len = 1;
164
165                status = (dbp->seq)(dbp, &key, &data, R_FIRST);
166                while (status == RET_SUCCESS) {
167                        iov[0].iov_base = data.data;
168                        iov[0].iov_len = data.size;
169                        if (_writev(t->bt_rfd, iov, 2) != (ssize_t)(data.size + 1))
170                                return (RET_ERROR);
171                        status = (dbp->seq)(dbp, &key, &data, R_NEXT);
172                }
173        }
174
175        /* Restore the cursor. */
176        t->bt_cursor.rcursor = scursor;
177
178        if (status == RET_ERROR)
179                return (RET_ERROR);
180        if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1)
181                return (RET_ERROR);
182        if (ftruncate(t->bt_rfd, off))
183                return (RET_ERROR);
184        F_CLR(t, R_MODIFIED);
185        return (RET_SUCCESS);
186}
Note: See TracBrowser for help on using the repository browser.