begin_revolving_shard.h (2010B)
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/include/taler/exchange-database/begin_revolving_shard.h 18 * @brief implementation of the begin_revolving_shard function for Postgres 19 * @author Christian Grothoff 20 */ 21 #ifndef EXCHANGE_DATABASE_BEGIN_REVOLVING_SHARD_H 22 #define EXCHANGE_DATABASE_BEGIN_REVOLVING_SHARD_H 23 24 #include "taler/taler_exchangedb_lib.h" 25 26 27 /** 28 * Function called to grab a revolving work shard on an operation @a op. Runs 29 * in its own transaction. Returns the oldest inactive shard. 30 * 31 * @param pg the database context 32 * @param job_name name of the operation to grab a revolving shard for 33 * @param shard_size desired shard size 34 * @param shard_limit exclusive end of the shard range 35 * @param[out] start_row inclusive start row of the shard (returned) 36 * @param[out] end_row inclusive end row of the shard (returned) 37 * @return transaction status code 38 */ 39 enum GNUNET_DB_QueryStatus 40 TALER_EXCHANGEDB_begin_revolving_shard (struct 41 TALER_EXCHANGEDB_PostgresContext *pg, 42 const char *job_name, 43 uint32_t shard_size, 44 uint32_t shard_limit, 45 uint32_t *start_row, 46 uint32_t *end_row); 47 48 #endif