2 This file is part of PulseAudio.
4 Copyright 2009 Lennart Poettering
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
28 /* Some versions of tdb lack inclusion of signal.h in the header files but use sigatomic_t */
32 #include <pulse/xmalloc.h>
33 #include <pulsecore/core-util.h>
34 #include <pulsecore/log.h>
38 #define MAKE_TDB_CONTEXT(x) ((struct tdb_context*) (x))
40 static inline TDB_DATA* datum_to_tdb(TDB_DATA *to, const pa_datum *from) {
44 to->dptr = from->data;
45 to->dsize = from->size;
50 static inline pa_datum* datum_from_tdb(pa_datum *to, const TDB_DATA *from) {
54 to->data = from->dptr;
55 to->size = from->dsize;
60 void pa_datum_free(pa_datum *d) {
63 free(d->data); /* tdb uses raw malloc/free hence we should do that here, too */
67 static struct tdb_context *tdb_open_cloexec(
74 /* Mimics pa_open_cloexec() */
76 struct tdb_context *c;
79 open_flags |= O_NOCTTY;
84 if ((c = tdb_open(name, hash_size, tdb_flags, open_flags | O_CLOEXEC, mode)))
92 if (!(c = tdb_open(name, hash_size, tdb_flags, open_flags, mode)))
96 pa_make_fd_cloexec(tdb_fd(c));
100 const char* pa_database_get_filename_suffix(void) {
104 pa_database* pa_database_open_internal(const char *path, bool for_write) {
105 struct tdb_context *c;
109 if ((c = tdb_open_cloexec(path, 0, TDB_NOSYNC|TDB_NOLOCK, (for_write ? O_RDWR|O_CREAT : O_RDONLY), 0644)))
110 pa_log_debug("Opened TDB database '%s'", path);
118 return (pa_database*) c;
121 void pa_database_close(pa_database *db) {
124 tdb_close(MAKE_TDB_CONTEXT(db));
127 pa_datum* pa_database_get(pa_database *db, const pa_datum *key, pa_datum* data) {
128 TDB_DATA tdb_key, tdb_data;
134 tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));
136 return tdb_data.dptr ?
137 datum_from_tdb(data, &tdb_data) :
141 int pa_database_set(pa_database *db, const pa_datum *key, const pa_datum* data, bool overwrite) {
142 TDB_DATA tdb_key, tdb_data;
148 return tdb_store(MAKE_TDB_CONTEXT(db),
149 *datum_to_tdb(&tdb_key, key),
150 *datum_to_tdb(&tdb_data, data),
151 overwrite ? TDB_REPLACE : TDB_INSERT) != 0 ? -1 : 0;
154 int pa_database_unset(pa_database *db, const pa_datum *key) {
160 return tdb_delete(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key)) != 0 ? -1 : 0;
163 int pa_database_clear(pa_database *db) {
166 return tdb_wipe_all(MAKE_TDB_CONTEXT(db)) != 0 ? -1 : 0;
169 signed pa_database_size(pa_database *db) {
177 tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));
179 while (tdb_key.dptr) {
184 next = tdb_nextkey(MAKE_TDB_CONTEXT(db), tdb_key);
192 pa_datum* pa_database_first(pa_database *db, pa_datum *key, pa_datum *data) {
193 TDB_DATA tdb_key, tdb_data;
198 tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));
204 tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);
206 if (!tdb_data.dptr) {
211 datum_from_tdb(data, &tdb_data);
214 datum_from_tdb(key, &tdb_key);
219 pa_datum* pa_database_next(pa_database *db, const pa_datum *key, pa_datum *next, pa_datum *data) {
220 TDB_DATA tdb_key, tdb_data;
225 tdb_key = tdb_nextkey(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));
231 tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);
233 if (!tdb_data.dptr) {
238 datum_from_tdb(data, &tdb_data);
241 datum_from_tdb(next, &tdb_key);
246 int pa_database_sync(pa_database *db) {