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by brian
clean slate |
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/* Copyright (C) 2007 MySQL AB
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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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Classes for the thread scheduler
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*/
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface
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#endif
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class THD; |
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/* Functions used when manipulating threads */
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class scheduler_functions |
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{
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public: |
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uint max_threads; |
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bool (*init)(void); |
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bool (*init_new_connection_thread)(void); |
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void (*add_connection)(THD *thd); |
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void (*post_kill_notification)(THD *thd); |
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bool (*end_thread)(THD *thd, bool cache_thread); |
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void (*end)(void); |
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scheduler_functions(); |
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};
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enum scheduler_types |
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{
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SCHEDULER_ONE_THREAD_PER_CONNECTION=0, |
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SCHEDULER_NO_THREADS, |
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SCHEDULER_POOL_OF_THREADS
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};
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void one_thread_per_connection_scheduler(scheduler_functions* func); |
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void one_thread_scheduler(scheduler_functions* func); |
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#define HAVE_POOL_OF_THREADS 1
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struct event; |
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class thd_scheduler |
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{
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public: |
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bool logged_in; |
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struct event* io_event; |
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LIST list; |
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bool thread_attached; /* Indicates if THD is attached to the OS thread */ |
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#ifndef DBUG_OFF
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char dbug_explain_buf[256]; |
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void swap_dbug_explain(); |
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#endif
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thd_scheduler(); |
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~thd_scheduler(); |
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bool init(THD* parent_thd); |
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bool thread_attach(); |
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void thread_detach(); |
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};
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void pool_of_threads_scheduler(scheduler_functions* func); |