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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
78efa64e | 3 | * Copyright (C) 2005, 2007 Richard Kettlewell |
460b9539 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #ifndef TRACKDB_INT_H | |
22 | #define TRACKDB_INT_H | |
23 | ||
24 | extern DB_ENV *trackdb_env; | |
25 | ||
26 | extern DB *trackdb_tracksdb; | |
27 | extern DB *trackdb_prefsdb; | |
28 | extern DB *trackdb_searchdb; | |
3dc3d7db | 29 | extern DB *trackdb_tagsdb; |
2a10b70b | 30 | extern DB *trackdb_noticeddb; |
3dc3d7db | 31 | extern DB *trackdb_globaldb; |
a745dd43 | 32 | extern DB *trackdb_usersdb; |
460b9539 | 33 | |
34 | DBC *trackdb_opencursor(DB *db, DB_TXN *tid); | |
35 | /* open a transaction */ | |
36 | ||
37 | int trackdb_closecursor(DBC *c); | |
38 | /* close transaction, returns 0 or DB_LOCK_DEADLOCK */ | |
39 | ||
40 | int trackdb_notice(const char *track, | |
41 | const char *path); | |
42 | int trackdb_notice_tid(const char *track, | |
43 | const char *path, | |
44 | DB_TXN *tid); | |
45 | /* notice a track; return DB_NOTFOUND if new, else 0. _tid can return | |
46 | * DB_LOCK_DEADLOCK too. */ | |
47 | ||
48 | int trackdb_obsolete(const char *track, DB_TXN *tid); | |
49 | /* obsolete a track */ | |
50 | ||
51 | DB_TXN *trackdb_begin_transaction(void); | |
52 | void trackdb_abort_transaction(DB_TXN *tid); | |
53 | void trackdb_commit_transaction(DB_TXN *tid); | |
54 | /* begin, abort or commit a transaction */ | |
55 | ||
f0feb22e RK |
56 | /** @brief Evaluate @p expr in a transaction, looping on deadlock |
57 | * | |
58 | * @c tid will be the transaction handle. @p e will be the error code. | |
59 | */ | |
60 | #define WITH_TRANSACTION(expr) do { \ | |
61 | DB_TXN *tid; \ | |
62 | \ | |
63 | tid = trackdb_begin_transaction(); \ | |
64 | while((e = (expr)) == DB_LOCK_DEADLOCK) { \ | |
65 | trackdb_abort_transaction(tid); \ | |
66 | tid = trackdb_begin_transaction(); \ | |
67 | } \ | |
68 | if(e) \ | |
69 | trackdb_abort_transaction(tid); \ | |
70 | else \ | |
71 | trackdb_commit_transaction(tid); \ | |
72 | } while(0) | |
73 | ||
460b9539 | 74 | int trackdb_getdata(DB *db, |
75 | const char *track, | |
76 | struct kvp **kp, | |
77 | DB_TXN *tid); | |
78 | /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or | |
79 | * DB_LOCK_DEADLOCK. */ | |
80 | ||
81 | int trackdb_putdata(DB *db, | |
82 | const char *track, | |
83 | const struct kvp *k, | |
84 | DB_TXN *tid, | |
85 | u_int32_t flags); | |
86 | /* encode and store a database entry. Returns 0, DB_KEYEXIST or | |
87 | * DB_LOCK_DEADLOCK. */ | |
88 | ||
89 | int trackdb_delkey(DB *db, | |
90 | const char *track, | |
91 | DB_TXN *tid); | |
92 | /* delete a database entry. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */ | |
93 | ||
94 | int trackdb_delkeydata(DB *db, | |
95 | const char *word, | |
96 | const char *track, | |
97 | DB_TXN *tid); | |
98 | /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */ | |
99 | ||
100 | int trackdb_scan(const char *root, | |
101 | int (*callback)(const char *track, | |
102 | struct kvp *data, | |
103 | void *u, | |
104 | DB_TXN *tid), | |
105 | void *u, | |
106 | DB_TXN *tid); | |
d1694464 | 107 | /* Call CALLBACK for each non-alias track below ROOT (or all tracks if ROOT is |
108 | * 0). Return 0 or DB_LOCK_DEADLOCK. CALLBACK should return 0 on success or | |
109 | * EINTR to cancel the scan. */ | |
460b9539 | 110 | |
111 | /* fill KEY in with S, returns KEY */ | |
2a10b70b | 112 | |
460b9539 | 113 | static inline DBT *make_key(DBT *key, const char *s) { |
114 | memset(key, 0, sizeof *key); | |
115 | key->data = (void *)s; | |
116 | key->size = strlen(s); | |
117 | return key; | |
118 | } | |
119 | ||
120 | /* set DATA up to receive data, returns DATA */ | |
121 | static inline DBT *prepare_data(DBT *data) { | |
122 | memset(data, 0, sizeof *data); | |
123 | data->flags = DB_DBT_MALLOC; | |
124 | return data; | |
125 | } | |
126 | ||
127 | /* encode K and store in DATA, returns DATA */ | |
128 | static inline DBT *encode_data(DBT *data, const struct kvp *k) { | |
129 | size_t size; | |
130 | ||
131 | memset(data, 0, sizeof *data); | |
132 | data->data = kvp_urlencode(k, &size); | |
133 | data->size = size; | |
134 | return data; | |
135 | } | |
136 | ||
f9635e06 RK |
137 | int trackdb_set_global_tid(const char *name, |
138 | const char *value, | |
139 | DB_TXN *tid); | |
140 | int trackdb_get_global_tid(const char *name, | |
141 | DB_TXN *tid, | |
142 | const char **rp); | |
143 | ||
460b9539 | 144 | #endif /* TRACKDB_INT_H */ |
145 | ||
146 | /* | |
147 | Local Variables: | |
148 | c-basic-offset:2 | |
149 | comment-column:40 | |
150 | fill-column:79 | |
151 | indent-tabs-mode:nil | |
152 | End: | |
153 | */ |