Function sys_timerfd_gettime

components/lwp/lwp_syscall.c:10744–10768

* @brief Retrieve the current configuration of a timer. * * This function is used to obtain the current expiration time and interval of a timer associated * with a file descriptor created by `sys_timerfd_create`. It allows querying the current state * of the timer, including the time remaining until the next expiration and the period (for periodic timers). * * @param[in] fd The file descr

 *       contain a value of `0`.
 */
sysret_t sys_timerfd_gettime(int fd, struct itimerspec *cur)
{
    int ret = -1;
    struct itimerspec *kcur;

    if (cur == RT_NULL)
        return -EINVAL;

    if (!lwp_user_accessable((void *)cur, sizeof(struct itimerspec)))
    {
        return -EFAULT;
    }

    kcur = kmem_get(sizeof(struct itimerspec));

    if (kcur)
    {
        lwp_get_from_user(kcur, cur, sizeof(struct itimerspec));
        ret = timerfd_gettime(fd, kcur);
        lwp_put_to_user(cur, kcur, sizeof(struct itimerspec));
        kmem_put(kcur);
    }

    return (ret < 0 ? GET_ERRNO() : ret);
}

/**
 * @brief Create a file descriptor for receiving signals.