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#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <util/rate.h>
#include <util/util.h>
rate_t *rate_new(int call_rate){
rate_t *r;
NEW0(r);
r->call_rate = call_rate;
r->gtod_rate = call_rate / 10;
r->sleep_rate = call_rate / 100;
r->ts.tv_sec = 0;
r->ts.tv_nsec = 4E6;
if(r->gtod_rate == 0)
r->gtod_rate = 1;
if(r->sleep_rate == 0)
r->sleep_rate = 1;
gettimeofday(&r->tv[0], NULL);
return r;
}
void rate_free(rate_t **r){
FREE(*r);
}
void rate_call(rate_t *r, void (fn)(void *), void *data){
(r->call_no)++;
(r->call_no_last)++;
if(unlikely(r->call_no % r->sleep_rate == 0)){
nanosleep(&r->ts, NULL);
}
if(unlikely(r->call_no % r->gtod_rate == 0)){
gettimeofday(&r->tv[1], NULL);
double d0 = r->tv[0].tv_sec + r->tv[0].tv_usec / 1E6;
double d1 = r->tv[1].tv_sec + r->tv[1].tv_usec / 1E6;
r->cur_rate = ((int) (r->call_no_last / (d1 - d0)));
if(abs(r->cur_rate - r->call_rate) > 10){
if(r->cur_rate - r->call_rate > 0){
if(r->sleep_rate > 1){
int d = r->sleep_rate / 10;
r->sleep_rate -= (d > 1 ? d : 1);
VERBOSE("sleep_rate=%d", r->sleep_rate);
}
}else if (r->sleep_rate < 1E6){
int d = r->sleep_rate / 10;
r->sleep_rate += (d > 1 ? d : 1);
VERBOSE("sleep_rate=%d", r->sleep_rate);
}
}
r->call_no_last = 0;
r->tv[0] = r->tv[1];
}
if(fn) fn(data);
}
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