event_listen.c (1942B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022 Taler Systems SA 4 5 TALER is free software; you can redistribute it and/or modify it under the 6 terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3, or (at your option) any later version. 8 9 TALER is distributed in the hope that it will be useful, but WITHOUT ANY 10 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR 11 A PARTICULAR PURPOSE. See the GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License along with 14 TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> 15 */ 16 /** 17 * @file src/donaudb/event_listen.c 18 * @brief Implementation of the event_listen function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include <donau_config.h> 22 #include <taler/taler_error_codes.h> 23 #include <taler/taler_dbevents.h> 24 #include <taler/taler_pq_lib.h> 25 #include "event_listen.h" 26 #include "helper.h" 27 28 /** 29 * Register callback to be invoked on events of type @a es. 30 * 31 * @param ctx database context to use 32 * @param timeout how long until to generate a timeout event 33 * @param es specification of the event to listen for 34 * @param cb function to call when the event happens, possibly 35 * multiple times (until cancel is invoked) 36 * @param cb_cls closure for @a cb 37 * @return handle useful to cancel the listener 38 */ 39 struct GNUNET_DB_EventHandler * 40 DONAUDB_event_listen (struct DONAUDB_PostgresContext *ctx, 41 struct GNUNET_TIME_Relative timeout, 42 const struct GNUNET_DB_EventHeaderP *es, 43 GNUNET_DB_EventCallback cb, 44 void *cb_cls) 45 { 46 return GNUNET_PQ_event_listen (ctx->conn, 47 es, 48 timeout, 49 cb, 50 cb_cls); 51 }