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aaf2bdde94
In order to allow thread schedulers to be dynamically loaded, it is necessary to make the following changes to the server: - Two new service interfaces - Modifications to InnoDB to inform the thread scheduler of state changes. - Changes to the VIO subsystem for checking if data is available on a socket. - Elimination of remains of the old thread pool implementation. The two new service interfaces introduces are: my_thread_scheduler A service interface to register a thread scheduler. thd_wait A service interface to inform thread scheduler that the thread is about to start waiting. In addition, the patch adds code that: - Add a call to thd_wait for table locks in mysys thd_lock.c by introducing a set function that can be used to set a callback to be used when waiting on a lock and resuming from waiting. - Calling the mysys set function from the server to set the callbacks correctly.
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
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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 as published by
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the Free Software Foundation; version 2 of the License.
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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)) \
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(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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