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#ifndef CTRS_H_
#define CTRS_H_
/* $FreeBSD$ */
#include <sys/time.h>
/* counters to accumulate statistics */
struct my_ctrs {
uint64_t pkts, bytes, events;
uint64_t drop, drop_bytes;
uint64_t min_space;
struct timeval t;
uint32_t oq_n; /* number of elements in overflow queue (used in lb) */
};
/* very crude code to print a number in normalized form.
* Caller has to make sure that the buffer is large enough.
*/
static const char *
norm2(char *buf, double val, char *fmt, int normalize)
{
char *units[] = { "", "K", "M", "G", "T" };
u_int i;
if (normalize)
for (i = 0; val >=1000 && i < sizeof(units)/sizeof(char *) - 1; i++)
val /= 1000;
else
i=0;
sprintf(buf, fmt, val, units[i]);
return buf;
}
static __inline const char *
norm(char *buf, double val, int normalize)
{
if (normalize)
return norm2(buf, val, "%.3f %s", normalize);
else
return norm2(buf, val, "%.0f %s", normalize);
}
static __inline int
timespec_ge(const struct timespec *a, const struct timespec *b)
{
if (a->tv_sec > b->tv_sec)
return (1);
if (a->tv_sec < b->tv_sec)
return (0);
if (a->tv_nsec >= b->tv_nsec)
return (1);
return (0);
}
static __inline struct timespec
timeval2spec(const struct timeval *a)
{
struct timespec ts = {
.tv_sec = a->tv_sec,
.tv_nsec = a->tv_usec * 1000
};
return ts;
}
static __inline struct timeval
timespec2val(const struct timespec *a)
{
struct timeval tv = {
.tv_sec = a->tv_sec,
.tv_usec = a->tv_nsec / 1000
};
return tv;
}
static __inline struct timespec
timespec_add(struct timespec a, struct timespec b)
{
struct timespec ret = { a.tv_sec + b.tv_sec, a.tv_nsec + b.tv_nsec };
if (ret.tv_nsec >= 1000000000) {
ret.tv_sec++;
ret.tv_nsec -= 1000000000;
}
return ret;
}
static __inline struct timespec
timespec_sub(struct timespec a, struct timespec b)
{
struct timespec ret = { a.tv_sec - b.tv_sec, a.tv_nsec - b.tv_nsec };
if (ret.tv_nsec < 0) {
ret.tv_sec--;
ret.tv_nsec += 1000000000;
}
return ret;
}
static __inline uint64_t
wait_for_next_report(struct timeval *prev, struct timeval *cur,
int report_interval)
{
struct timeval delta;
delta.tv_sec = report_interval/1000;
delta.tv_usec = (report_interval%1000)*1000;
if (select(0, NULL, NULL, NULL, &delta) < 0 && errno != EINTR) {
perror("select");
abort();
}
gettimeofday(cur, NULL);
timersub(cur, prev, &delta);
return delta.tv_sec* 1000000 + delta.tv_usec;
}
#endif /* CTRS_H_ */
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