The only thing we have to do to free memory is to take the pointer we're given, back up sizeof (struct mem_control_block) bytes, and mark it as available. Here is the code for that.
为了释放内存，我们必须要做的惟一一件事情就是，获得我们给出的指针，回退size of (struct mem_control_block)个字节，并将其标记为可用的。
System counters within this category track memory data such as the number of bytes available and the number of bytes cached.
此类别内的系统计数器跟踪内存数据，如可用字节数和缓存的字节数。
System counters within this category track memory data such as the number of bytes available and the number of bytes cached.
此类别内的系统计数器跟踪内存数据，如可用字节数和缓存的字节数。
应用推荐