public void Tick()
{
int update_count = 0;
MailboxCache mail_box = null;
foreach (var obj in m_mailboxs)
{
mail_box = obj.Value;
if (mail_box.NeedSave())
{
mail_box.Save();
if (++update_count > 60)
{
break; //当次循环最大保存数量
}
}
}
}