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Add support for embedded platforms that don't have high-res timers.

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This commit is contained in:
Anthony Doko
2011-02-17 07:21:35 -08:00
committed by Justin Maggard
parent 0426aa2d08
commit 949cf3808d
4 changed files with 116 additions and 8 deletions
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51
src/misc.c
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@@ -751,6 +751,57 @@ murmur_hash64(const void *key, int len, uint32_t seed)
return h;
}
int
clock_gettime_with_res(clockid_t clock_id, struct timespec *tp, struct timespec *res)
{
int r_val = -1;
if(res && tp)
{
r_val = clock_gettime(clock_id, tp);
/* this will only work for sub-second resolutions. */
if(r_val == 0 && res->tv_nsec > 1)
{
tp->tv_nsec = (tp->tv_nsec/res->tv_nsec)*res->tv_nsec;
}
}
return r_val;
}
struct timespec
timespec_add(struct timespec time1, struct timespec time2)
{
struct timespec result;
result.tv_sec = time1.tv_sec + time2.tv_sec;
result.tv_nsec = time1.tv_nsec + time2.tv_nsec;
if (result.tv_nsec >= 1000000000L)
{
result.tv_sec++;
result.tv_nsec -= 1000000000L;
}
return result;
}
int
timespec_cmp(struct timespec time1, struct timespec time2)
{
/* Less than. */
if (time1.tv_sec < time2.tv_sec)
return -1;
/* Greater than. */
else if (time1.tv_sec > time2.tv_sec)
return 1;
/* Less than. */
else if (time1.tv_nsec < time2.tv_nsec)
return -1;
/* Greater than. */
else if (time1.tv_nsec > time2.tv_nsec)
return 1;
/* Equal. */
else
return 0;
}
#else
# error Platform not supported
#endif