743a1b1037
The polling statistics collection used atomic_add to increment values. This is not an optimal way to update statistical values. Moved to per thread values which are summed up when they are read. Moved the functions used to gather polling statistics to their own file and created a specific data type for statistics.
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#ifndef _STATISTICS_HG
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#define _STATISTICS_HG
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/*
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* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright MariaDB Corporation Ab 2016
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*/
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/**
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* @file statistics.h - Lock-free statistics gathering
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 21/01/16 Markus Makela Initial implementation
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* @endverbatim
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*/
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typedef void* ts_stats_t;
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/** stats_init should be called only once */
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void ts_stats_init();
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/** No-op for now */
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void ts_stats_end();
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/** Every thread should call set_current_thread_id only once */
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void ts_stats_set_thread_id(int id);
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ts_stats_t ts_stats_alloc();
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void ts_stats_free(ts_stats_t stats);
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void ts_stats_add(ts_stats_t stats, int value);
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void ts_stats_set(ts_stats_t stats, int value);
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int ts_stats_sum(ts_stats_t stats);
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#endif
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