112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
|
|
* Averaging functions
|
|
* Copyright (C) 2007 Andreas Öman
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "avg.h"
|
|
#include <stdlib.h>
|
|
|
|
void
|
|
avgstat_init(avgstat_t *as, int depth)
|
|
{
|
|
TAILQ_INIT(&as->as_queue);
|
|
pthread_mutex_init(&as->as_mutex, NULL);
|
|
as->as_depth = depth;
|
|
}
|
|
|
|
|
|
void
|
|
avgstat_flush(avgstat_t *as)
|
|
{
|
|
avgstat_entry_t *ase;
|
|
|
|
while((ase = TAILQ_FIRST(&as->as_queue)) != NULL) {
|
|
TAILQ_REMOVE(&as->as_queue, ase, ase_link);
|
|
free(ase);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
avgstat_expire(avgstat_t *as, int now)
|
|
{
|
|
avgstat_entry_t *ase;
|
|
|
|
while(1) {
|
|
ase = TAILQ_LAST(&as->as_queue, avgstat_entry_queue);
|
|
if(ase == NULL || ase->ase_clock > now - as->as_depth)
|
|
break;
|
|
TAILQ_REMOVE(&as->as_queue, ase, ase_link);
|
|
free(ase);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
avgstat_add(avgstat_t *as, int count, time_t now)
|
|
{
|
|
avgstat_entry_t *ase;
|
|
|
|
pthread_mutex_lock(&as->as_mutex);
|
|
ase = TAILQ_FIRST(&as->as_queue);
|
|
if(ase != NULL && ase->ase_clock == now) {
|
|
ase->ase_count += count;
|
|
} else {
|
|
ase = malloc(sizeof(avgstat_entry_t));
|
|
TAILQ_INSERT_HEAD(&as->as_queue, ase, ase_link);
|
|
ase->ase_clock = now;
|
|
ase->ase_count = count;
|
|
}
|
|
|
|
avgstat_expire(as, now);
|
|
pthread_mutex_unlock(&as->as_mutex);
|
|
}
|
|
|
|
|
|
unsigned int
|
|
avgstat_read_and_expire(avgstat_t *as, time_t now)
|
|
{
|
|
avgstat_entry_t *ase;
|
|
int r = 0;
|
|
|
|
pthread_mutex_lock(&as->as_mutex);
|
|
|
|
avgstat_expire(as, now);
|
|
|
|
TAILQ_FOREACH(ase, &as->as_queue, ase_link)
|
|
r += ase->ase_count;
|
|
|
|
pthread_mutex_unlock(&as->as_mutex);
|
|
return r;
|
|
}
|
|
|
|
unsigned int
|
|
avgstat_read(avgstat_t *as, int depth, time_t now)
|
|
{
|
|
avgstat_entry_t *ase;
|
|
int r = 0;
|
|
|
|
pthread_mutex_lock(&as->as_mutex);
|
|
|
|
TAILQ_FOREACH(ase, &as->as_queue, ase_link) {
|
|
if(ase->ase_clock < now - depth)
|
|
break;
|
|
r += ase->ase_count;
|
|
}
|
|
pthread_mutex_unlock(&as->as_mutex);
|
|
return r;
|
|
}
|
|
|