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document macros, avoid passing useless 'result' argument

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This commit is contained in:
Christian Grothoff 2015-06-03 11:31:51 +02:00
parent 401745fc30
commit da44aa5679
1 changed files with 48 additions and 22 deletions
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70
src/mintdb/plugin_mintdb_postgres.c
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@ -13,7 +13,6 @@
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file plugin_mintdb_postgres.c
* @brief Low-level (statement-level) Postgres database access for the mint
@ -29,19 +28,40 @@
#include "plugin_mintdb_common.c"
/**
* For testing / experiments, we set the Postgres schema to
* #TALER_TEMP_SCHEMA_NAME so we can easily purge everything
* associated with a test. We *also* should use the database
* "talercheck" instead of "taler" for testing, but we're doing
* both: better safe than sorry.
*/
#define TALER_TEMP_SCHEMA_NAME "taler_temporary"
/**
* Log a query error.
*
* @param result PQ result object of the query that failed
*/
#define QUERY_ERR(result) \
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Query failed at %s:%u: %s\n", __FILE__, __LINE__, PQresultErrorMessage (result))
/**
* Log a really unexpected PQ error.
*
* @param result PQ result object of the PQ operation that failed
*/
#define BREAK_DB_ERR(result) do { \
GNUNET_break(0); \
GNUNET_break (0); \
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Database failure: %s\n", PQresultErrorMessage (result)); \
} while (0)
/**
* Shorthand for exit jumps.
* Shorthand for exit jumps. Logs the current line number
* and jumps to the "EXITIF_exit" label.
*
* @param cond condition that must be TRUE to exit with an error
*/
#define EXITIF(cond) \
do { \
@ -49,22 +69,36 @@
} while (0)
#define SQLEXEC_(conn, sql, result) \
/**
* Execute an SQL statement and log errors on failure. Must be
* run in a function that has an "SQLEXEC_fail" label to jump
* to in case the SQL statement failed.
*
* @param conn database connection
* @param sql SQL statement to run
*/
#define SQLEXEC_(conn, sql) \
do { \
result = PQexec (conn, sql); \
PGresult *result = PQexec (conn, sql); \
if (PGRES_COMMAND_OK != PQresultStatus (result)) \
{ \
BREAK_DB_ERR (result); \
PQclear (result); result = NULL; \
PQclear (result); \
goto SQLEXEC_fail; \
} \
PQclear (result); result = NULL; \
PQclear (result); \
} while (0)
#define SQLEXEC_IGNORE_ERROR_(conn, sql, result) \
/**
* Run an SQL statement, ignoring errors and clearing the result.
*
* @param conn database connection
* @param sql SQL statement to run
*/
#define SQLEXEC_IGNORE_ERROR_(conn, sql) \
do { \
result = PQexec (conn, sql); \
PQclear (result); result = NULL; \
PGresult *result = PQexec (conn, sql); \
PQclear (result); \
} while (0)
@ -111,12 +145,9 @@ struct PostgresClosure
static int
set_temporary_schema (PGconn *db)
{
PGresult *result;
SQLEXEC_(db,
"CREATE SCHEMA IF NOT EXISTS " TALER_TEMP_SCHEMA_NAME ";"
"SET search_path to " TALER_TEMP_SCHEMA_NAME ";",
result);
"SET search_path to " TALER_TEMP_SCHEMA_NAME ";");
return GNUNET_OK;
SQLEXEC_fail:
return GNUNET_SYSERR;
@ -134,11 +165,8 @@ static int
postgres_drop_temporary (void *cls,
struct TALER_MINTDB_Session *session)
{
PGresult *result;
SQLEXEC_ (session->conn,
"DROP SCHEMA " TALER_TEMP_SCHEMA_NAME " CASCADE;",
result);
"DROP SCHEMA " TALER_TEMP_SCHEMA_NAME " CASCADE;");
return GNUNET_OK;
SQLEXEC_fail:
return GNUNET_SYSERR;
@ -157,10 +185,8 @@ postgres_create_tables (void *cls,
int temporary)
{
struct PostgresClosure *pc = cls;
PGresult *result;
PGconn *conn;
result = NULL;
conn = PQconnectdb (pc->connection_cfg_str);
if (CONNECTION_OK != PQstatus (conn))
{
@ -176,8 +202,8 @@ postgres_create_tables (void *cls,
PQfinish (conn);
return GNUNET_SYSERR;
}
#define SQLEXEC(sql) SQLEXEC_(conn, sql, result);
#define SQLEXEC_INDEX(sql) SQLEXEC_IGNORE_ERROR_(conn, sql, result);
#define SQLEXEC(sql) SQLEXEC_(conn, sql);
#define SQLEXEC_INDEX(sql) SQLEXEC_IGNORE_ERROR_(conn, sql);
/* Denomination table for holding the publicly available information of
denominations keys. The denominations are to be referred to by using
foreign keys. The denominations are deleted by a housekeeping tool;