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/* Copyright (C) 2007 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
Classes for the thread scheduler
*/
#ifdef USE_PRAGMA_INTERFACE
#pragma interface
#endif
class THD;
/* Functions used when manipulating threads */
class scheduler_functions
{
public:
uint max_threads;
bool (*init)(void);
bool (*init_new_connection_thread)(void);
void (*add_connection)(THD *thd);
void (*post_kill_notification)(THD *thd);
bool (*end_thread)(THD *thd, bool cache_thread);
void (*end)(void);
scheduler_functions();
};
enum scheduler_types
{
SCHEDULER_ONE_THREAD_PER_CONNECTION=0,
SCHEDULER_NO_THREADS,
SCHEDULER_POOL_OF_THREADS
};
void one_thread_per_connection_scheduler(scheduler_functions* func);
void one_thread_scheduler(scheduler_functions* func);
#define HAVE_POOL_OF_THREADS 1
struct event;
class thd_scheduler
{
public:
bool logged_in;
struct event* io_event;
LIST list;
bool thread_attached; /* Indicates if THD is attached to the OS thread */
char dbug_explain_buf[256];
void swap_dbug_explain();
thd_scheduler();
~thd_scheduler();
bool init(THD* parent_thd);
bool thread_attach();
void thread_detach();
};
void pool_of_threads_scheduler(scheduler_functions* func);
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