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lib: posix: clock: Use k_uptime_get() to compute tv_nsec

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Use k_uptime_get() to compute both tv_sec and tv_nsec members
of timespec structure.

Fixes #8009

Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
This commit is contained in:
Ramakrishna Pallala 2018-06-02 12:17:18 +05:30 committed by Anas Nashif
parent 158ea970ea
commit 03a3c992b8
1 changed files with 4 additions and 10 deletions
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14
lib/posix/clock.c
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@ -15,8 +15,7 @@
*/
int clock_gettime(clockid_t clock_id, struct timespec *ts)
{
s64_t elapsed_msecs, elapsed_secs;
s64_t elapsed_nsec, elapsed_cycles;
u64_t elapsed_msecs;
if (clock_id != CLOCK_MONOTONIC) {
errno = EINVAL;
@ -24,14 +23,9 @@ int clock_gettime(clockid_t clock_id, struct timespec *ts)
}
elapsed_msecs = k_uptime_get();
elapsed_secs = elapsed_msecs / MSEC_PER_SEC;
ts->tv_sec = (s32_t) (elapsed_msecs / MSEC_PER_SEC);
ts->tv_nsec = (s32_t) ((elapsed_msecs % MSEC_PER_SEC) *
USEC_PER_MSEC * NSEC_PER_USEC);
elapsed_cycles = (s64_t) (k_cycle_get_32() %
sys_clock_hw_cycles_per_sec);
elapsed_nsec = (s64_t) ((elapsed_cycles * NSEC_PER_SEC) /
sys_clock_hw_cycles_per_sec);
ts->tv_sec = (s32_t) elapsed_secs;
ts->tv_nsec = (s32_t) elapsed_nsec;
return 0;
}