mirror of
https://github.com/cjdelisle/cjdns
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73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* vim: set expandtab ts=4 sw=4: */
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/*
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* You may redistribute this program and/or modify it under the terms of
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* the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef AverageRoller_pvt_H
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#define AverageRoller_pvt_H
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#include "util/AverageRoller.h"
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#include "util/events/EventBase.h"
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#include "util/Linker.h"
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Linker_require("util/AverageRoller.c")
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/** Used to represent the sum and entry count for a given second. */
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struct AverageRoller_SumAndEntryCount
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{
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/** Sum of all entries. */
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uint32_t sum;
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/** Number of entries. */
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uint32_t entryCount;
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};
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/**
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* A structure for helping calculate a rolling average over some number of seconds.
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* Each element in "seconds" array is responsable for 1 second and it is a circular array.
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*/
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struct AverageRoller_pvt
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{
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struct AverageRoller pub;
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/** The average will be calculated over this number of seconds. */
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const uint32_t windowSeconds;
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/** The number of seconds since the epoch when the average was last updated. */
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uint32_t lastUpdateTime;
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/** The index of the array when the roller was last updated. */
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uint32_t lastUpdateIndex;
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/** The sum of every entry in the last windowSeconds seconds. */
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uint32_t sum;
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/** The total number of entries in the last windowSeconds seconds. */
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uint32_t entryCount;
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/** A stored value equal to the sum divided by the entry count. */
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uint32_t average;
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/** Means of getting the current time. */
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EventBase_t* eventBase;
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Identity
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/**
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* An array of entries containing sum and entry count for each second
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* in the seconds prior to the last update.
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* This array pretends to contain one entry but actually contans windowSeconds entries.
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*/
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struct AverageRoller_SumAndEntryCount seconds[1];
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};
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#endif
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