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49 lines
1.9 KiB
49 lines
1.9 KiB
5 months ago
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/*
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Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef SQL_CALLBACK_INCLUDED
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#define SQL_CALLBACK_INCLUDED
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/**
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Macro used for an internal callback.
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The macro will check that the object exists and that the function
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is defined. If that is the case, it will call the function with the
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given parameters.
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If the object or the function is not defined, the callback will be
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considered successful (nothing needed to be done) and will
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therefore return no error.
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*/
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#define MYSQL_CALLBACK(OBJ, FUNC, PARAMS) \
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do { \
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if ((OBJ) && ((OBJ)->FUNC)) (OBJ)->FUNC PARAMS; \
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} while (0)
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#define MYSQL_CALLBACK_ELSE(OBJ, FUNC, PARAMS, ELSE) \
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(((OBJ) && ((OBJ)->FUNC)) ? (OBJ)->FUNC PARAMS : (ELSE))
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#endif /* SQL_CALLBACK_INCLUDED */
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