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util: Add high resolution sleep support.

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This commit introduces xnanosleep() for the threads needing high
resolution sleep timeouts.

usleep() that provides microsecond granularity is deprecated and threads
wanting sub-second(ms,us,ns) granularity can use this implementation.

Signed-off-by: Bhanuprakash Bodireddy <bhanuprakash.bodireddy@intel.com>
Acked-by: Alin Gabriel Serdean <aserdean@ovn.org>
Signed-off-by: Ben Pfaff <blp@ovn.org>
This commit is contained in:
Bhanuprakash Bodireddy
2017-11-28 22:02:06 +00:00
committed by Ben Pfaff
parent a89e91c6ab
commit ca3cc1aad4
4 changed files with 56 additions and 0 deletions
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19
lib/timeval.c
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@@ -514,6 +514,25 @@ msec_to_timespec(long long int ms, struct timespec *ts)
ts->tv_nsec = (ms % 1000) * 1000 * 1000;
}
void
nsec_to_timespec(long long int nsec, struct timespec *ts)
{
if (!nsec) {
ts->tv_sec = ts->tv_nsec = 0;
return;
}
ts->tv_sec = nsec / (1000 * 1000 * 1000);
nsec = nsec % (1000 * 1000 * 1000);
/* This is to handle dates before epoch. */
if (OVS_UNLIKELY(nsec < 0)) {
nsec += 1000 * 1000 * 1000;
ts->tv_sec--;
}
ts->tv_nsec = nsec;
}
static void
timewarp_work(void)
{