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-rw-r--r--src/exchangedb/pg_event_listen.c53
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diff --git a/src/exchangedb/pg_event_listen.c b/src/exchangedb/pg_event_listen.c
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+++ b/src/exchangedb/pg_event_listen.c
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+/*
+ This file is part of TALER
+ Copyright (C) 2022 Taler Systems SA
+
+ TALER 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 3, or (at your option) any later version.
+
+ TALER 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
+ TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+ */
+/**
+ * @file exchangedb/pg_event_listen.c
+ * @brief Implementation of the event_listen function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_event_listen.h"
+#include "pg_helper.h"
+
+/**
+ * Register callback to be invoked on events of type @a es.
+ *
+ * @param cls database context to use
+ * @param timeout how long until to generate a timeout event
+ * @param es specification of the event to listen for
+ * @param cb function to call when the event happens, possibly
+ * multiple times (until cancel is invoked)
+ * @param cb_cls closure for @a cb
+ * @return handle useful to cancel the listener
+ */
+struct GNUNET_DB_EventHandler *
+TEH_PG_event_listen (void *cls,
+ struct GNUNET_TIME_Relative timeout,
+ const struct GNUNET_DB_EventHeaderP *es,
+ GNUNET_DB_EventCallback cb,
+ void *cb_cls)
+{
+ struct PostgresClosure *pg = cls;
+
+ return GNUNET_PQ_event_listen (pg->conn,
+ es,
+ timeout,
+ cb,
+ cb_cls);
+}