Function sys_clock_gettime

components/lwp/lwp_syscall.c:8094–8132

* @brief Retrieves the current time of a specified clock. * * This function retrieves the current time of the specified clock (identified by `clk`) and stores it in the * `struct timespec` pointed to by `ts`. The time is expressed in seconds and nanoseconds. The clock can be * one of several types, such as real-time, monotonic, or process-specific clocks. * * @param[in] clk The clock ID for

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

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

    kts = kmem_get(size);
    if (!kts)
    {
        return -ENOMEM;
    }

    ret = clock_gettime(clk, kts);
    if (ret != -1)
        lwp_put_to_user(ts, kts, size);

    if (ret < 0)
    {
        ret = GET_ERRNO();
    }

    kmem_put(kts);

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

/**
 * @brief Suspends the execution of the calling thread for the specified time duration.