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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
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/*
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Looking Glass
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Copyright (C) 2017-2021 The Looking Glass Authors
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https://looking-glass.io
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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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., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "common/runningavg.h"
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#include <stdlib.h>
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struct RunningAvg
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{
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int length, samples;
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int pos;
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int value;
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int64_t values[0];
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};
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RunningAvg runningavg_new(int length)
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{
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struct RunningAvg * ra = calloc(1, sizeof(*ra) + sizeof(*ra->values) * length);
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ra->length = length;
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return ra;
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}
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void runningavg_free(RunningAvg * ra)
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{
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free(*ra);
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*ra = NULL;
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}
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void runningavg_push(RunningAvg ra, int64_t value)
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{
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if (ra->samples == ra->length)
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ra->value -= ra->values[ra->pos];
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else
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++ra->samples;
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ra->value += value;
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ra->values[ra->pos++] = value;
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if (ra->pos == ra->length)
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ra->pos = 0;
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}
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void runningavg_reset(RunningAvg ra)
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{
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ra->samples = 0;
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ra->pos = 0;
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ra->value = 0;
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}
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double runningavg_calc(RunningAvg ra)
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{
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return (double)ra->value / ra->samples;
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}
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