You could even just use a single pointer and write data back into the buffer you got it from, although this might be a nuisance to program for on the other end.
您甚至只需要使用一个指针并将数据写回到读取数据所使用的缓冲区中即可，不过这对于另外一端的编程来说可能有些麻烦。
If a function needs to maintain the state of some data over successive calls, such as a working buffer or a pointer, the caller should provide this data.
如果函数需要在一系列调用期间维持某些数据的状态，比如工作缓存或指针，那么调用者应该提供此数据。
Pointer to a buffer that contains the data required to perform the operation.
指向一个缓冲区，其包含执行操作所必须的数据。
A pointer to the buffer that contains data to be written in the address space of the specified process.
指向的缓冲区中包含的数据来写的地址空间指定的进程。
A pointer to the buffer that contains data to be written in the address space of the specified process.
指向的缓冲区中包含的数据来写的地址空间指定的进程。
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