1/*
2 Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
16*/
17
18#ifndef SQL_CALLBACK_INCLUDED
19#define SQL_CALLBACK_INCLUDED
20
21/**
22 Macro used for an internal callback.
23
24 The macro will check that the object exists and that the function
25 is defined. If that is the case, it will call the function with the
26 given parameters.
27
28 If the object or the function is not defined, the callback will be
29 considered successful (nothing needed to be done) and will
30 therefore return no error.
31 */
32
33#define MYSQL_CALLBACK(OBJ, FUNC, PARAMS) \
34 do { \
35 if ((OBJ) && ((OBJ)->FUNC)) \
36 (OBJ)->FUNC PARAMS; \
37 } while (0)
38
39#define MYSQL_CALLBACK_ELSE(OBJ, FUNC, PARAMS, ELSE) \
40 (((OBJ) && ((OBJ)->FUNC)) ? (OBJ)->FUNC PARAMS : (ELSE))
41
42#endif /* SQL_CALLBACK_INCLUDED */
43