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  • Committer: Brian Aker
  • Date: 2009-08-21 18:46:31 UTC
  • mto: This revision was merged to the branch mainline in revision 1123.
  • Revision ID: brian@gaz-20090821184631-e11gja79070fvhk4
Cleanup around page checksum removal

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drizzled/scheduler.h
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2008 Sun Microsystems
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 *
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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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 *
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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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 *
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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 DRIZZLE_SERVER_SCHEDULER_H
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#define DRIZZLE_SERVER_SCHEDULER_H
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/*
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  Classes for the thread scheduler
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*/
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/* Forward declarations */
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class THD;
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struct event;
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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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  uint32_t 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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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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  char dbug_explain_buf[256];
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  void swap_dbug_explain();
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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);
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#endif /* DRIZZLE_SERVER_SCHEDULER_H */