Re: [Chicken-users] using mmap files as strings?

[F. Wittenberger]

Am Dienstag, den 02.11.2010, 13:22 +0000 schrieb Alaric Snell-Pym:
> On 10/27/10 13:02, Jörg F. Wittenberger wrote:
> > Another application would be shared substrings.  Or the combination of
> > both.  Example: feed a file content to a port, formatted as HTTP chunked
> > encoding.  A shared substring pointing right into the mmaped file could
> > save all copying.  The expense would be one object allocation holding
> > #{pointer, start, end}.
> 
> Just FYI, ages ago I wondered if it would be a good idea to make an
> underlying "blob abstraction" that's a pointer, a size, and a custom
> freeing function,

A so called "finalizer" to speak with chicken Scheme terms.  ;-)

>  so it can wrap malloc()ed memory, mmap()ed memory, and
> whatever other special things might exist.
> 
> Then have blobs, strings, srfi-4 vectors, and friends all have the
> option of being a reference to one of the above with an offset and
> limit, so they can be views into arbitrary data from external sources.

Pretty much how I'd like things to be!