74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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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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* 15/06/16 Martin Brampton Frequently used functions inlined
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <stdint.h>
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MXS_BEGIN_DECLS
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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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ts_stats_t ts_stats_alloc();
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void ts_stats_free(ts_stats_t stats);
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int64_t ts_stats_sum(ts_stats_t stats);
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/**
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* @brief Increment thread statistics by one
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*
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* @param stats Statistics to add to
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* @param thread_id ID of thread
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*/
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static void inline
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ts_stats_increment(ts_stats_t stats, int thread_id)
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{
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((int64_t*)stats)[thread_id]++;
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}
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/**
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* @brief Assign a value to a statistics element
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*
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* This sets the value for the specified thread.
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*
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* @param stats Statistics to set
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* @param value Value to set to
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* @param thread_id ID of thread
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*
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* @note Appears to be unused
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*/
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static void inline
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ts_stats_set(ts_stats_t stats, int value, int thread_id)
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{
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((int64_t*)stats)[thread_id] = value;
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}
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MXS_END_DECLS
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