1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
* Copyright (c) 2021 One Identity
*
* 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "stats/aggregator/stats-aggregator.h"
#include "stats/stats-registry.h"
#include "stats/stats-cluster-single.h"
typedef struct
{
StatsAggregator super;
atomic_gssize count;
atomic_gssize sum;
} StatsAggregatorAverage;
static inline void
_inc_count(StatsAggregatorAverage *self)
{
atomic_gssize_inc(&self->count);
}
static inline void
_add_sum(StatsAggregatorAverage *self, gsize value)
{
atomic_gssize_add(&self->sum, value);
}
static inline gsize
_get_sum(StatsAggregatorAverage *self)
{
return atomic_gssize_get_unsigned(&self->sum);
}
static inline gsize
_get_count(StatsAggregatorAverage *self)
{
return atomic_gssize_get_unsigned(&self->count);
}
static void
_add_data_point(StatsAggregator *s, gsize value)
{
StatsAggregatorAverage *self = (StatsAggregatorAverage *)s;
/*
* this function isn't truely atomic, reset might set count to zero
* and we want to avoid zero division
*/
gsize sum = _get_sum(self) + value;
gsize divisor = _get_count(self) + 1;
stats_counter_set(self->super.output_counter, sum/divisor);
_add_sum(self, value);
_inc_count(self);
}
static void
_reset(StatsAggregator *s)
{
StatsAggregatorAverage *self = (StatsAggregatorAverage *)s;
atomic_gssize_set(&self->count, 0);
atomic_gssize_set(&self->sum, 0);
stats_counter_set(self->super.output_counter, 0);
}
static void
_set_virtual_function(StatsAggregatorAverage *self )
{
self->super.add_data_point = _add_data_point;
self->super.reset = _reset;
}
StatsAggregator *
stats_aggregator_average_new(gint level, StatsClusterKey *sc_key)
{
StatsAggregatorAverage *self = g_new0(StatsAggregatorAverage, 1);
stats_aggregator_init_instance(&self->super, sc_key, level);
_set_virtual_function(self);
return &self->super;
}
|
