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#define MAX_THREAD_GROUPS 128
/* Threadpool parameters */
extern uint threadpool_min_threads; /* Minimum threads in pool */
extern uint threadpool_idle_timeout; /* Shutdown idle worker threads after this timeout */
extern uint threadpool_size; /* Number of parallel executing threads */
extern uint threadpool_stall_limit; /* time interval in 10 ms units for stall checks*/
extern uint threadpool_max_threads; /* Maximum threads in pool */
extern uint threadpool_oversubscribe; /* Maximum active threads in group */
/*
Functions used by scheduler.
OS-specific implementations are in
threadpool_unix.cc or threadpool_win.cc
*/
extern bool tp_init();
extern void tp_add_connection(THD*);
extern void tp_wait_begin(THD *, int);
extern void tp_wait_end(THD*);
extern void tp_post_kill_notification(THD *thd);
extern void tp_end(void);
/* Used in SHOW for threadpool_idle_thread_count */
extern int tp_get_idle_thread_count();
/*
Threadpool statistics
*/
struct TP_STATISTICS
{
/* Current number of worker thread. */
volatile int32 num_worker_threads;
};
extern TP_STATISTICS tp_stats;
/* Functions to set threadpool parameters */
extern void tp_set_min_threads(uint val);
extern void tp_set_max_threads(uint val);
extern int tp_set_threadpool_size(uint val);
extern void tp_set_threadpool_stall_limit(uint val);
/* Activate threadpool scheduler */
extern void tp_scheduler(void);
extern int show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff);
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