clocks that go backwards.
Arguments:
- tgt_tv A timeval which was used to create uniqueness; its usec field
+ prev_tv A timeval which was used to create uniqueness; its usec field
has been rounded down to the value of the resolution.
We want to be sure the current time is greater than this.
+ On return, updated to current (rounded down).
resolution The resolution that was used to divide the microseconds
(1 for maildir, larger for message ids)
*/
void
-exim_wait_tick(struct timeval * tgt_tv, int resolution)
+exim_wait_tick(struct timeval * prev_tv, int resolution)
{
struct timeval now_tv;
long int now_true_usec;
now_true_usec = now_tv.tv_usec;
now_tv.tv_usec = (now_true_usec/resolution) * resolution;
-while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
+while (exim_tvcmp(&now_tv, prev_tv) <= 0)
{
struct itimerval itval;
itval.it_interval.tv_sec = 0;
itval.it_interval.tv_usec = 0;
- itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
- itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
+ itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec;
+ itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec;
/* We know that, overall, "now" is less than or equal to "then". Therefore, a
negative value for the microseconds is possible only in the case when "now"
if (!f.running_in_test_harness)
{
debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
- tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
+ prev_tv->tv_sec, (long) prev_tv->tv_usec,
now_tv.tv_sec, (long) now_tv.tv_usec);
debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
now_true_usec = now_tv.tv_usec;
now_tv.tv_usec = (now_true_usec/resolution) * resolution;
}
+*prev_tv = now_tv;
}