| /* |
| * include/haproxy/freq_ctr.h |
| * This file contains structure declarations for frequency counters. |
| * |
| * Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation, version 2.1 |
| * exclusively. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef _HAPROXY_FREQ_CTR_T_H |
| #define _HAPROXY_FREQ_CTR_T_H |
| |
| #include <haproxy/api-t.h> |
| |
| /* The implicit freq_ctr counter counts a rate of events per second. It is the |
| * preferred form to count rates over a one-second period, because it does not |
| * involve any divide. |
| */ |
| struct freq_ctr { |
| unsigned int curr_sec; /* start date of current period (seconds from now.tv_sec) */ |
| unsigned int curr_ctr; /* cumulated value for current period */ |
| unsigned int prev_ctr; /* value for last period */ |
| }; |
| |
| /* The generic freq_ctr_period counter counts a rate of events per period, where |
| * the period has to be known by the user. The period is measured in ticks and |
| * must be at least 2 ticks long. This form is slightly more CPU intensive than |
| * the per-second form. |
| */ |
| struct freq_ctr_period { |
| unsigned int curr_tick; /* start date of current period (wrapping ticks) */ |
| unsigned int curr_ctr; /* cumulated value for current period */ |
| unsigned int prev_ctr; /* value for last period */ |
| }; |
| |
| #endif /* _HAPROXY_FREQ_CTR_T_H */ |
| |
| /* |
| * Local variables: |
| * c-indent-level: 8 |
| * c-basic-offset: 8 |
| * End: |
| */ |