rep-cache.h revision 299742 
1/* rep-cache.h : interface to rep cache db functions
2 *
3 * ====================================================================
4 *    Licensed to the Apache Software Foundation (ASF) under one
5 *    or more contributor license agreements.  See the NOTICE file
6 *    distributed with this work for additional information
7 *    regarding copyright ownership.  The ASF licenses this file
8 *    to you under the Apache License, Version 2.0 (the
9 *    "License"); you may not use this file except in compliance
10 *    with the License.  You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 *    Unless required by applicable law or agreed to in writing,
15 *    software distributed under the License is distributed on an
16 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 *    KIND, either express or implied.  See the License for the
18 *    specific language governing permissions and limitations
19 *    under the License.
20 * ====================================================================
21 */
22
23#ifndef SVN_LIBSVN_FS_FS_REP_CACHE_H
24#define SVN_LIBSVN_FS_FS_REP_CACHE_H
25
26#include "svn_error.h"
27
28#include "fs.h"
29
30#ifdef __cplusplus
31extern "C" {
32#endif /* __cplusplus */
33
34
35#define REP_CACHE_DB_NAME        "rep-cache.db"
36
37/* Open and create, if needed, the rep cache database associated with FS.
38   Use POOL for temporary allocations. */
39svn_error_t *
40svn_fs_fs__open_rep_cache(svn_fs_t *fs,
41                          apr_pool_t *pool);
42
43/* Set *EXISTS to TRUE iff the rep-cache DB file exists. */
44svn_error_t *
45svn_fs_fs__exists_rep_cache(svn_boolean_t *exists,
46                            svn_fs_t *fs, apr_pool_t *pool);
47
48/* Iterate all representations currently in FS's cache. */
49svn_error_t *
50svn_fs_fs__walk_rep_reference(svn_fs_t *fs,
51                              svn_revnum_t start,
52                              svn_revnum_t end,
53                              svn_error_t *(*walker)(representation_t *rep,
54                                                     void *walker_baton,
55                                                     svn_fs_t *fs,
56                                                     apr_pool_t *scratch_pool),
57                              void *walker_baton,
58                              svn_cancel_func_t cancel_func,
59                              void *cancel_baton,
60                              apr_pool_t *pool);
61
62/* Return the representation REP in FS which has fulltext CHECKSUM.
63   REP is allocated in POOL.  If the rep cache database has not been
64   opened, just set *REP to NULL.  Returns SVN_ERR_FS_CORRUPT if
65   a reference beyond HEAD is detected. */
66svn_error_t *
67svn_fs_fs__get_rep_reference(representation_t **rep,
68                             svn_fs_t *fs,
69                             svn_checksum_t *checksum,
70                             apr_pool_t *pool);
71
72/* Set the representation REP in FS, using REP->CHECKSUM.
73   Use POOL for temporary allocations.  Returns SVN_ERR_FS_CORRUPT if
74   an existing reference beyond HEAD is detected.
75
76   If the rep cache database has not been opened, this may be a no op. */
77svn_error_t *
78svn_fs_fs__set_rep_reference(svn_fs_t *fs,
79                             representation_t *rep,
80                             apr_pool_t *pool);
81
82/* Delete from the cache all reps corresponding to revisions younger
83   than YOUNGEST. */
84svn_error_t *
85svn_fs_fs__del_rep_reference(svn_fs_t *fs,
86                             svn_revnum_t youngest,
87                             apr_pool_t *pool);
88
89/* Start a transaction to take an SQLite reserved lock that prevents
90   other writes, call BODY, end the transaction, and return what BODY returned.
91 */
92svn_error_t *
93svn_fs_fs__with_rep_cache_lock(svn_fs_t *fs,
94                               svn_error_t *(*body)(void *baton,
95                                                    apr_pool_t *pool),
96                               void *baton,
97                               apr_pool_t *pool);
98
99#ifdef __cplusplus
100}
101#endif /* __cplusplus */
102
103#endif /* SVN_LIBSVN_FS_FS_REP_CACHE_H */
104