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56 lines
1.9 KiB
56 lines
1.9 KiB
5 months ago
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/*
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* include/haproxy/freq_ctr.h
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* This file contains structure declarations for frequency counters.
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*
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* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_FREQ_CTR_T_H
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#define _HAPROXY_FREQ_CTR_T_H
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#include <haproxy/api-t.h>
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/* The implicit freq_ctr counter counts a rate of events per second. It is the
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* preferred form to count rates over a one-second period, because it does not
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* involve any divide.
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*/
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struct freq_ctr {
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unsigned int curr_sec; /* start date of current period (seconds from now.tv_sec) */
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unsigned int curr_ctr; /* cumulated value for current period */
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unsigned int prev_ctr; /* value for last period */
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};
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/* The generic freq_ctr_period counter counts a rate of events per period, where
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* the period has to be known by the user. The period is measured in ticks and
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* must be at least 2 ticks long. This form is slightly more CPU intensive than
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* the per-second form.
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*/
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struct freq_ctr_period {
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unsigned int curr_tick; /* start date of current period (wrapping ticks) */
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unsigned int curr_ctr; /* cumulated value for current period */
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unsigned int prev_ctr; /* value for last period */
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};
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#endif /* _HAPROXY_FREQ_CTR_T_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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