Basic Pointer 为啥需要 Pointer？ 更容易在不同代码段之间共享信息，在不同代码段之间来回复制也是可以的。但用指针的形式更好。 链式数据结构, 如链表和二

condition variable 是啥？ condition variable 是啥？本质上就是一个状态变量 +队列。现实世界中，想要进行下一步的行动，往往需要满足一定的条件(condition)。如十字路口

a association a connection or cooperative link between people or organizations allot to assign as a share or portion ad-hoc An ad hoc activity or organization is done or formed only because a situation has made it necessary and is not planned in advance.Ad hoc is a word that originally comes from Latin and means “for this” or "for this situation." In current

为啥需要 lock？ 多处理器的存在 中断的存在 lock 是啥？ lock 本质上是一个变量。变量本质上是一块内存。归根结底，lock 就是一块内存，用这块内存来保证