summaryrefslogtreecommitdiff
path: root/accel-pppd/radius/stat_accm.c
blob: fe5da6edf250a414396a87d10c2be44df2cf2460 (plain)
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
#include <string.h>
#include <stdlib.h>

#include "radius_p.h"
#include "mempool.h"
#include "memdebug.h"

struct item_t
{
	struct list_head entry;
	unsigned int val;
	time_t ts;
};

struct stat_accm_t
{
	pthread_mutex_t lock;
	struct list_head items;
	unsigned int items_cnt;
	unsigned int time;
	unsigned long total;
};

static mempool_t item_pool;

struct stat_accm_t *stat_accm_create(unsigned int time)
{
	struct stat_accm_t *s = _malloc(sizeof(*s));

	memset(s, 0, sizeof(*s));
	pthread_mutex_init(&s->lock, NULL);
	INIT_LIST_HEAD(&s->items);
	s->time = time;

	return s;
}

void stat_accm_free(struct stat_accm_t *s)
{
	struct item_t *it;

	while (!list_empty(&s->items)) {
		it = list_entry(s->items.next, typeof(*it), entry);
		list_del(&it->entry);
		mempool_free(it);
	}

	_free(s);
}

static void stat_accm_clean(struct stat_accm_t *s)
{
	struct item_t *it;
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);

	while (!list_empty(&s->items)) {
		it = list_entry(s->items.next, typeof(*it), entry);
		if (ts.tv_sec - it->ts > s->time) {
			list_del(&it->entry);
			--s->items_cnt;
			s->total -= it->val;
			mempool_free(it);
		} else
			break;
	}
}

void stat_accm_add(struct stat_accm_t *s, unsigned int val)
{
	struct item_t *it;
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);

	pthread_mutex_lock(&s->lock);

	stat_accm_clean(s);

	it = mempool_alloc(item_pool);
	it->ts = ts.tv_sec;
	it->val = val;
	list_add_tail(&it->entry, &s->items);
	++s->items_cnt;
	s->total += val;

	pthread_mutex_unlock(&s->lock);
}

unsigned long stat_accm_get_cnt(struct stat_accm_t *s)
{
	pthread_mutex_lock(&s->lock);
	stat_accm_clean(s);
	pthread_mutex_unlock(&s->lock);

	return s->items_cnt;
}

unsigned long stat_accm_get_avg(struct stat_accm_t *s)
{
	unsigned long val;
	pthread_mutex_lock(&s->lock);
	stat_accm_clean(s);
	val = s->items_cnt ? s->total/s->items_cnt : 0;
	pthread_mutex_unlock(&s->lock);

	return val;
}

static void init(void)
{
	item_pool = mempool_create(sizeof(struct item_t));
}

DEFINE_INIT(50, init);