statistics: Introduce 'struct counter' instead of using unsigned long
This has the advantage that counters can be added all over the code
very easily, while having only one routine that stores all of the
current counter values to the database. The counters are synced
every 60 seconds, providing relatively fine grained statistics
about the network usage as time passes by.
diff --git a/openbsc/src/statistics.c b/openbsc/src/statistics.c
new file mode 100644
index 0000000..3429d6e
--- /dev/null
+++ b/openbsc/src/statistics.c
@@ -0,0 +1,85 @@
+/* utility routines for keeping some statistics */
+
+/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+
+#include <sys/types.h>
+
+#include <openbsc/gsm_data.h>
+#include <openbsc/signal.h>
+#include <openbsc/linuxlist.h>
+#include <openbsc/talloc.h>
+#include <openbsc/statistics.h>
+#include <openbsc/db.h>
+#include <openbsc/timer.h>
+
+static LLIST_HEAD(counters);
+
+static struct timer_list db_sync_timer;
+
+#define DB_SYNC_INTERVAL 60, 0
+
+struct counter *counter_alloc(const char *name)
+{
+ struct counter *ctr = talloc_zero(tall_bsc_ctx, struct counter);
+
+ if (!ctr)
+ return NULL;
+
+ ctr->name = name;
+ llist_add_tail(&ctr->list, &counters);
+
+ return ctr;
+}
+
+void counter_free(struct counter *ctr)
+{
+ llist_del(&ctr->list);
+ talloc_free(ctr);
+}
+
+int counters_store_db(void)
+{
+ struct counter *ctr;
+ int rc = 0;
+
+ llist_for_each_entry(ctr, &counters, list) {
+ rc = db_store_counter(ctr);
+ if (rc < 0)
+ return rc;
+ }
+
+ return rc;
+}
+
+static void db_sync_timer_cb(void *data)
+{
+ /* store counters to database and re-schedule */
+ counters_store_db();
+ bsc_schedule_timer(&db_sync_timer, DB_SYNC_INTERVAL);
+}
+
+static __attribute__((constructor)) void on_dso_load_stat(void)
+{
+ db_sync_timer.cb = db_sync_timer_cb;
+ db_sync_timer.data = NULL;
+ bsc_schedule_timer(&db_sync_timer, DB_SYNC_INTERVAL);
+}