Re: Double-buffering read/write to files

["Theodore H. Smith" <delete at elfdata dot com>]

On 11 Dec 2006, at 20:26, Menneteau wrote:

> Theodore H. Smith wrote:
> > Also, anyone know anything about double-buffering file streams?
> >
> > So, basically, how I'd like it to work, is that ask for a read  
> > into the buffer, and return instantly before the read is complete!  
> > The user will process a previously made buffer. By the time he's  
> > finished processing it, the last read will be complete. If not,  
> > we'll actually just block until the read is complete.
> > Does fread offer such functionality? OR any standard Unix calls?
> fread not, but read yes.
> You control the read behavior with fcntl.
> Basically, you can make the read asynchronous (O_NONBLOCK), you can  
> be notified when data is available (O_ASYNC), and you can disable  
> data caching (F_NOCACHE).
> This should work on Unix and Mac OS. I don't know how this works  
> for windows.
Windows will just have to be slower ;)

Unless fcntl works for Windows too.

Mac + Unix is good enough for me :)


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