From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 May 2009 23:22:49 +0000 (+0200)
Subject: database: add tdb backend
X-Git-Tag: submit/2.0-panda/20130828.192557~1794
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6df14e016148cc50e92911fda8c641cc35482198;p=profile%2Fivi%2Fpulseaudio-panda.git

database: add tdb backend
---

diff --git a/src/pulsecore/database-tdb.c b/src/pulsecore/database-tdb.c
new file mode 100644
index 0000000..c35fd81
--- /dev/null
+++ b/src/pulsecore/database-tdb.c
@@ -0,0 +1,224 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2009 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <tdb.h>
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/log.h>
+
+#include "database.h"
+
+#define MAKE_TDB_CONTEXT(x) ((struct tdb_context*) (x))
+
+static inline TDB_DATA* datum_to_tdb(TDB_DATA *to, const pa_datum *from) {
+    pa_assert(from);
+    pa_assert(to);
+
+    to->dptr = from->data;
+    to->dsize = from->size;
+
+    return to;
+}
+
+static inline pa_datum* datum_from_tdb(pa_datum *to, const TDB_DATA *from) {
+    pa_assert(from);
+    pa_assert(to);
+
+    to->data = from->dptr;
+    to->size = from->dsize;
+
+    return to;
+}
+
+void pa_datum_free(pa_datum *d) {
+    pa_assert(d);
+
+    free(d->data); /* tdb uses raw malloc/free hence we should do that here, too */
+    pa_zero(d);
+}
+
+pa_database* pa_database_open(const char *fn, pa_bool_t for_write) {
+    struct tdb_context *c;
+    char *path;
+
+    pa_assert(fn);
+
+    path = pa_sprintf_malloc("%s.tdb", fn);
+    errno = 0;
+    c = tdb_open(path, 0, TDB_NOSYNC|TDB_NOLOCK,
+                 (for_write ? O_RDWR|O_CREAT : O_RDONLY)|O_NOCTTY
+#ifdef O_CLOEXEC
+                 |O_CLOEXEC
+#endif
+                 , 0644);
+
+    if (c)
+        pa_log_debug("Opened TDB database '%s'", path);
+
+    pa_xfree(path);
+
+    if (!c) {
+        if (errno == 0)
+            errno = EIO;
+        return NULL;
+    }
+
+    return (pa_database*) c;
+}
+
+void pa_database_close(pa_database *db) {
+    pa_assert(db);
+
+    tdb_close(MAKE_TDB_CONTEXT(db));
+}
+
+pa_datum* pa_database_get(pa_database *db, const pa_datum *key, pa_datum* data) {
+    TDB_DATA tdb_key, tdb_data;
+
+    pa_assert(db);
+    pa_assert(key);
+    pa_assert(data);
+
+    tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));
+
+    return tdb_data.dptr ?
+        datum_from_tdb(data, &tdb_data) :
+        NULL;
+}
+
+int pa_database_set(pa_database *db, const pa_datum *key, const pa_datum* data, pa_bool_t overwrite) {
+    TDB_DATA tdb_key, tdb_data;
+
+    pa_assert(db);
+    pa_assert(key);
+    pa_assert(data);
+
+    return tdb_store(MAKE_TDB_CONTEXT(db),
+                      *datum_to_tdb(&tdb_key, key),
+                      *datum_to_tdb(&tdb_data, data),
+                     overwrite ? TDB_REPLACE : TDB_INSERT) != 0 ? -1 : 0;
+}
+
+int pa_database_unset(pa_database *db, const pa_datum *key) {
+    TDB_DATA tdb_key;
+
+    pa_assert(db);
+    pa_assert(key);
+
+    return tdb_delete(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key)) != 0 ? -1 : 0;
+}
+
+int pa_database_clear(pa_database *db) {
+    pa_assert(db);
+
+    return tdb_wipe_all(MAKE_TDB_CONTEXT(db)) != 0 ? -1 : 0;
+}
+
+signed pa_database_size(pa_database *db) {
+    TDB_DATA tdb_key;
+    unsigned n = 0;
+
+    pa_assert(db);
+
+    /* This sucks */
+
+    tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));
+
+    while (tdb_key.dptr) {
+        TDB_DATA next;
+
+        n++;
+
+        next = tdb_nextkey(MAKE_TDB_CONTEXT(db), tdb_key);
+        free(tdb_key.dptr);
+        tdb_key = next;
+    }
+
+    return (signed) n;
+}
+
+pa_datum* pa_database_first(pa_database *db, pa_datum *key, pa_datum *data) {
+    TDB_DATA tdb_key, tdb_data;
+
+    pa_assert(db);
+    pa_assert(key);
+
+    tdb_key = tdb_firstkey(MAKE_TDB_CONTEXT(db));
+
+    if (!tdb_key.dptr)
+        return NULL;
+
+    if (data) {
+        tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);
+
+        if (!tdb_data.dptr) {
+            free(tdb_key.dptr);
+            return NULL;
+        }
+
+        datum_from_tdb(data, &tdb_data);
+    }
+
+    datum_from_tdb(key, &tdb_key);
+
+    return key;
+}
+
+pa_datum* pa_database_next(pa_database *db, const pa_datum *key, pa_datum *next, pa_datum *data) {
+    TDB_DATA tdb_key, tdb_data;
+
+    pa_assert(db);
+    pa_assert(key);
+
+    tdb_key = tdb_nextkey(MAKE_TDB_CONTEXT(db), *datum_to_tdb(&tdb_key, key));
+
+    if (!tdb_key.dptr)
+        return NULL;
+
+    if (data) {
+        tdb_data = tdb_fetch(MAKE_TDB_CONTEXT(db), tdb_key);
+
+        if (!tdb_data.dptr) {
+            free(tdb_key.dptr);
+            return NULL;
+        }
+
+        datum_from_tdb(data, &tdb_data);
+    }
+
+    datum_from_tdb(next, &tdb_key);
+
+    return next;
+}
+
+int pa_database_sync(pa_database *db) {
+    pa_assert(db);
+
+    return 0;
+}