[RFC] I/O and Buffer Range

[Dmitry Olshansky]

17-Jan-2014 18:03, Steven Schveighoffer пишет:
> On Fri, 17 Jan 2014 05:01:35 -0500, Dmitry Olshansky
> <dmitry.olsh at gmail.com> wrote:
>
>> BTW I haven't thought of writing into the buffer, but it works exactly
>> the same. It could be even read/write -"discarded" data is written to
>> underlying stream, freshly loaded is read from stream. Now in case of
>> input stream only writes are nop, for output-only reads are nops.
>>
>> With pinning it makes for cool multi-pass algorithms that actually
>> output stuff into the file.
>
> In my experience, the code/process for a write buffer is significantly
> different than the code for a read buffer. A read/write buffer is very
> difficult to make, because you either need 2 file pointers, or need to
> constantly seek the single file pointer to overwrite the existing data.
>

Agreed, read/write buffer is a bad idea. As for write-only buffer 
implemented in the same style as read-only, well I need to try it first.


-- 
Dmitry Olshansky