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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.
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/* Copyright (C) 2009 Sun Microsystems, Inc.
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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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/* support for Services */
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#include <service_versions.h>
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struct st_service_ref {
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const char *name;
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uint version;
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void *service;
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};
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static struct my_snprintf_service_st my_snprintf_handler = {
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my_snprintf,
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my_vsnprintf
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};
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static struct thd_alloc_service_st thd_alloc_handler= {
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thd_alloc,
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thd_calloc,
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thd_strdup,
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thd_strmake,
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thd_memdup,
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thd_make_lex_string
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};
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static struct thd_wait_service_st thd_wait_handler= {
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thd_wait_begin,
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thd_wait_end
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};
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static struct my_thread_scheduler_service my_thread_scheduler_handler= {
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my_thread_scheduler_set,
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my_thread_scheduler_reset,
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};
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static struct st_service_ref list_of_services[]=
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{
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{ "my_snprintf_service", VERSION_my_snprintf, &my_snprintf_handler },
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{ "thd_alloc_service", VERSION_thd_alloc, &thd_alloc_handler },
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{ "thd_wait_service", VERSION_thd_wait, &thd_wait_handler },
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{ "my_thread_scheduler_service",
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VERSION_my_thread_scheduler, &my_thread_scheduler_handler },
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};
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