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posix: refactor timespec_to_timeoutms() to use tp_diff()

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Use the tp_diff() macro as a means of converting an absolute timeout
with respect to a specific clock to a relative timeout, in ms.

Clamp the result between 0 and UINT32_MAX.

Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
This commit is contained in:
Chris Friedt 2025-04-23 09:35:03 -04:00 • committed by Benjamin Cabé
commit e71c12c68f
1 changed files with 7 additions and 12 deletions
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19
lib/posix/options/timespec_to_timeout.c
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@ -6,24 +6,19 @@
#include "posix_clock.h"
#include <zephyr/kernel.h>
#include <ksched.h>
#include <limits.h>
#include <stdint.h>
#include <zephyr/posix/time.h>
#include <zephyr/sys/util.h>
uint32_t timespec_to_timeoutms(clockid_t clock_id, const struct timespec *abstime)
{
int64_t milli_secs, secs, nsecs;
struct timespec curtime;
clock_gettime(clock_id, &curtime);
secs = abstime->tv_sec - curtime.tv_sec;
nsecs = abstime->tv_nsec - curtime.tv_nsec;
if (secs < 0 || (secs == 0 && nsecs < NSEC_PER_MSEC)) {
milli_secs = 0;
} else {
milli_secs = secs * MSEC_PER_SEC + nsecs / NSEC_PER_MSEC;
if (clock_gettime(clock_id, &curtime) < 0) {
return 0;
}
return milli_secs;
return CLAMP(tp_diff(abstime, &curtime) / NSEC_PER_MSEC, 0, UINT32_MAX);
}