To allocate and free memory is expensive, therefore we should reuse buffers (memory) which have been allocated.
l分配和释放内存是很费时间的，因此我们要反复利用分配好的内存。
Special system calls, or requests to the UNIX kernel, allocate and free the memory and set permissions; common read and write operations put and get data from the region.
用特殊的系统调用(即对UNIX内核的请求)分配和释放内存并设置权限；通过一般的读写操作读写内存段中的数据。
We allocate memory on put (malloc) and we free memory on remove (free).
我们在放入数据的时候分配内存(malloc)，移除数据的时候释放内存(free)。
Applications can also use this interface to allocate and free their own memory.
应用程序可以用此接口来分配和释放他们自己的内存。
Applications can also use this interface to allocate and free their own memory.
应用程序可以用此接口来分配和释放他们自己的内存。
应用推荐