/**
 * Time functionality.
 */
module hulk.time;

import core.volatile;

struct Time
{
    /** System uptime (ms). */
    private static __gshared ulong s_uptime;

    /**
     * Millisecond ISR.
     */
    public static void ms_isr()
    {
        s_uptime++;
    }

    /**
     * Get system uptime (ms).
     */
    public static @property ulong uptime()
    {
        return volatileLoad(&s_uptime);
    }

    /**
     * Sleep for the given amount of time (ms).
     *
     * @param count
     *   Number of milliseconds to sleep for.
     */
    public static void msleep(ulong count)
    {
        ulong wait_for = uptime() + count + 1;
        while (uptime() < wait_for)
        {
        }
    }
}