/**
* Reset ping settings.
*
* \param[in,out] pi Ping info
*/
static inline void
reset_ping(ping_info_t *pi)
{
pi->delay.tv_sec = (long)EXAMSG_BASE_KEEPALIVE_PERIOD_SEC;
pi->delay.tv_usec =
(EXAMSG_BASE_KEEPALIVE_PERIOD_SEC - pi->delay.tv_sec) * 1.0e6;
EXA_ASSERT(TIMEVAL_IS_VALID(&pi->delay));
pi->factor = 1;
}
/**
* Adjust ping settings.
*
* \param[in,out] pi Ping info
*/
static void
adjust_ping(ping_info_t *pi)
{
unsigned new_factor;
float time;
/* Adjust the delay factor in order to slow down when no network
* messages are sent. The check on new_factor is to ensure there
* is no overflow */
new_factor = pi->factor * 2;
if (new_factor > pi->factor)
pi->factor = new_factor;
time = EXAMSG_BASE_KEEPALIVE_PERIOD_SEC * pi->factor;
time = (time > EXAMSG_MAX_KEEPALIVE_PERIOD_SEC
? EXAMSG_MAX_KEEPALIVE_PERIOD_SEC : time);
pi->delay.tv_sec = time;
pi->delay.tv_usec = (time - pi->delay.tv_sec) * 1.0e6;
EXA_ASSERT(TIMEVAL_IS_VALID(&pi->delay));
}
int os_sem_waittimeout(os_sem_t * sem, int timeout_ms)
{
struct timeval tv;
struct timespec time;
gettimeofday(&tv,NULL);
tv.tv_usec += (timeout_ms % 1000) * 1000;
tv.tv_sec += timeout_ms / 1000;
if (tv.tv_usec >= 1000000)
{
tv.tv_usec -= 1000000;
tv.tv_sec++;
}
OS_ASSERT(TIMEVAL_IS_VALID(&tv));
time.tv_nsec = tv.tv_usec * 1000;
time.tv_sec = tv.tv_sec;
OS_ASSERT(TIMESPEC_IS_VALID(&time));
return sem_timedwait(sem, &time) == 0 ? 0 : -errno;
}
