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72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/* Copyright (C) 2012 Monty Program 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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#define MAX_THREAD_GROUPS 100000
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/* Threadpool parameters */
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extern uint threadpool_min_threads; /* Minimum threads in pool */
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extern uint threadpool_idle_timeout; /* Shutdown idle worker threads after this timeout */
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extern uint threadpool_size; /* Number of parallel executing threads */
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extern uint threadpool_max_size;
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extern uint threadpool_stall_limit; /* time interval in 10 ms units for stall checks*/
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extern uint threadpool_max_threads; /* Maximum threads in pool */
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extern uint threadpool_oversubscribe; /* Maximum active threads in group */
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/* Common thread pool routines, suitable for different implementations */
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extern void threadpool_remove_connection(THD *thd);
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extern int threadpool_process_request(THD *thd);
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extern int threadpool_add_connection(THD *thd);
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/*
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Functions used by scheduler.
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OS-specific implementations are in
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threadpool_unix.cc or threadpool_win.cc
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*/
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extern bool tp_init();
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extern void tp_add_connection(THD*);
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extern void tp_wait_begin(THD *, int);
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extern void tp_wait_end(THD*);
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extern void tp_post_kill_notification(THD *thd);
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extern void tp_end(void);
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/* Used in SHOW for threadpool_idle_thread_count */
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extern int tp_get_idle_thread_count();
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/*
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Threadpool statistics
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*/
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struct TP_STATISTICS
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{
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/* Current number of worker thread. */
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volatile int32 num_worker_threads;
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};
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extern TP_STATISTICS tp_stats;
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/* Functions to set threadpool parameters */
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extern void tp_set_min_threads(uint val);
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extern void tp_set_max_threads(uint val);
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extern void tp_set_threadpool_size(uint val);
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extern void tp_set_threadpool_stall_limit(uint val);
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/* Activate threadpool scheduler */
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extern void tp_scheduler(void);
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extern int show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff,
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enum enum_var_type scope);
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