As its name implies, MailBox is essentially the Drop by itself, a single-slot buffer that holds a piece of data until it has been retrieved.
顾名思义,MailBox从本质上说就是Drop,用于在检测之前保存数据块的单槽缓冲区。
2
Since we are talking about the single-slot solution, it should be rather easy to place two of these in a Crossfire configuration, and this is something that OEMs really care about.