GetTickCountDifference

// By Southclaw (taken from https://github.com/Southclaw/ScavengeSurvive/blob/master/gamemodes/SS/utils/tickcountfix.pwn)

stock abs(int)
{
    if(int < 0)
        return -int;

    return int;
}

stock intdiffabs(tick1, tick2)
{
    if(tick1 > tick2)
        return abs(tick1 - tick2);

    else
        return abs(tick2 - tick1);
}

stock GetTickCountDifference(a, b)
{
    if ((a < 0) && (b > 0))
    {

        new dist;

        dist = intdiffabs(a, b);

        if(dist > 2147483647)
            return intdiffabs(a - 2147483647, b - 2147483647);

        else
            return dist;
    }

    return intdiffabs(a, b);
}


// Example of usage by http://forum.sa-mp.com/member.php?u=218502 (NOT TO BE USED WITH ANYTHING):

static
    LastShot[MAX_PLAYERS];

public OnPlayerWeaponShot(playerid, weaponid, hittype, hitid, Float:fX, Float:fY, Float:fZ)
{
    new
        interval = GetTickCountDifference(LastShot[playerid], GetTickCount());

    printf("[] Last shot interval: %i ms", interval);

    LastShot[playerid] = GetTickCount();

    return 1;
}