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Removed redundant service_thread_count

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In contrast to thread_count, which is decremented by THD destructor,
this one was most probably intended to be decremented after all THD
destructors are done.

THD_count class was added to achieve similar effect with thread_count.

Aim is to reduce usage of LOCK_thread_count and COND_thread_count.
Part of MDEV-15135.
This commit is contained in:
Sergey Vojtovich
2019-01-22 22:45:26 +04:00
parent 3503fbbebf
commit 9824ec81aa
7 changed files with 49 additions and 65 deletions
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2
sql/sql_class.cc
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@ -864,7 +864,6 @@ THD::THD(my_thread_id id, bool is_wsrep_applier, bool skip_global_sys_var_lock)
save_prep_leaf_list= FALSE;
/* Restore THR_THD */
set_current_thd(old_THR_THD);
inc_thread_count();
}
@ -1723,7 +1722,6 @@ THD::~THD()
}
update_global_memory_status(status_var.global_memory_used);
set_current_thd(orig_thd == this ? 0 : orig_thd);
dec_thread_count();
DBUG_VOID_RETURN;
}