lib: posix: clock: Implement clock_settime
Set a base time, using the current uptime. Signed-off-by: David Brown <david.brown@linaro.org>
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2 changed files with 35 additions and 11 deletions
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@ -49,18 +49,8 @@ static inline s32_t _ts_to_ms(const struct timespec *to)
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return (to->tv_sec * MSEC_PER_SEC) + (to->tv_nsec / NSEC_PER_MSEC);
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return (to->tv_sec * MSEC_PER_SEC) + (to->tv_nsec / NSEC_PER_MSEC);
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}
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}
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/**
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* @brief Set clock time.
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*
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* See IEEE 1003.1
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*/
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static inline int clock_settime(clockid_t clock_id, const struct timespec *ts)
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{
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errno = ENOSYS;
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return -1;
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}
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int clock_gettime(clockid_t clock_id, struct timespec *ts);
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int clock_gettime(clockid_t clock_id, struct timespec *ts);
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int clock_settime(clockid_t clock_id, const struct timespec *ts);
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/* Timer APIs */
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/* Timer APIs */
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int timer_create(clockid_t clockId, struct sigevent *evp, timer_t *timerid);
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int timer_create(clockid_t clockId, struct sigevent *evp, timer_t *timerid);
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int timer_delete(timer_t timerid);
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int timer_delete(timer_t timerid);
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@ -57,6 +57,40 @@ int clock_gettime(clockid_t clock_id, struct timespec *ts)
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return 0;
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return 0;
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}
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}
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/**
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* @brief Set the time of the specified clock.
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*
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* See IEEE 1003.1.
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*
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* Note that only the `CLOCK_REALTIME` clock can be set using this
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* call.
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*/
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int clock_settime(clockid_t clock_id, const struct timespec *tp)
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{
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struct timespec base;
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int res;
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if (clock_id != CLOCK_REALTIME) {
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errno = EINVAL;
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return -1;
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}
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res = clock_gettime(clock_id, &base);
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if (res != 0) {
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return res;
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}
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s64_t delta = (s64_t)NSEC_PER_SEC * (tp->tv_sec - base.tv_sec) +
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(tp->tv_nsec - base.tv_nsec);
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base.tv_sec = delta / NSEC_PER_SEC;
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base.tv_nsec = delta % NSEC_PER_SEC;
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rt_clock_base = base;
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return 0;
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}
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/**
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/**
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* @brief Get current real time.
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* @brief Get current real time.
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*
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*
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