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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.
65 lines
1.8 KiB
C
65 lines
1.8 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 SERVICE_THREAD_SCHEDULER_INCLUDED
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#define SERVICE_THREAD_SCHEDULER_INCLUDED
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct scheduler_functions;
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extern struct my_thread_scheduler_service {
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int (*set)(struct scheduler_functions *scheduler);
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int (*reset)();
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} *my_thread_scheduler_service;
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#ifdef MYSQL_DYNAMIC_PLUGIN
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#define my_thread_scheduler_set(F) my_thread_scheduler_service->set((F))
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#define my_thread_scheduler_reset() my_thread_scheduler_service->reset()
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#else
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/**
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Set the thread scheduler to use for the server.
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@param scheduler Pointer to scheduler callbacks to use.
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@retval 0 Scheduler installed correctly.
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@retval 1 Invalid value (NULL) used for scheduler.
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*/
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int my_thread_scheduler_set(struct scheduler_functions *scheduler);
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/**
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Restore the previous thread scheduler.
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@note If no thread scheduler was installed previously with
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thd_set_thread_scheduler, this function will report an error.
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@retval 0 Scheduler installed correctly.
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@retval 1 No scheduler installed.
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*/
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int my_thread_scheduler_reset();
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* SERVICE_THREAD_SCHEDULER_INCLUDED */
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