increment buggy?

[ehsmeng]

Hi list,

My memcache_increase() code below seems to misbehave under load.

If any would take a guess, would this possibly be in memcached, the
php interface or most likely in my code?

The returned value of this function sometimes is 2147483647 (when
increase_by is 1).

Thanks,
Marcus

function memcache_increase_site ($key, $increase_by)
{
    $mc = memcache_site_singleton ();

    if (false === $mc)
    {
        return false;
    }

    $val = memcache_increment ($mc, $key, $increase_by);
    if (false === $val)
    {
        if (false === memcache_set ($mc, $key, $increase_by, 0, 0))
        {
            return false;
        }
        else
        {
            return (int)$increase_by;
        }
    }
    else
    {
        return (int)$val;
    }
}