Function sys_clock_getres

components/lwp/lwp_syscall.c:8221–8245

* @brief Get the resolution of the specified clock. * * This function retrieves the resolution of the specified clock, which is the smallest time interval that the clock can measure. * The resolution is returned in a `struct timespec` which contains seconds and nanoseconds. * * @param[in] clk The clock ID for which to get the resolution. The clock can be one of the following: *

 * @see sys_clock_gettime(), sys_clock_settime(), sys_clock_nanosleep()
 */
sysret_t sys_clock_getres(clockid_t clk, struct timespec *ts)
{
    int ret = 0;
#ifdef ARCH_MM_MMU
    struct timespec kts;
    size_t size = sizeof(struct timespec);

    if (!lwp_user_accessable((void *)ts, size))
    {
        return -EFAULT;
    }

    ret = clock_getres(clk, &kts);

    if (ret != -1)
        lwp_put_to_user(ts, &kts, size);
#else
    if (!lwp_user_accessable((void *)ts, sizeof(struct timespec)))
    {
        return -EFAULT;
    }
    ret = clock_getres(clk, ts);
#endif
    return (ret < 0 ? GET_ERRNO() : ret);
}

/**
 * @brief Rename or move a file or directory.