Re: mmap for guile

[Matt Wette <matt.wette@gmail.com>]

Appologies: link is 
https://github.com/mwette/guile-contrib/blob/main/patch/3.0.8/mmap-api.patch

On 6/26/22 8:37 AM, Matt Wette wrote:
> I have a candidate mmap implementation for guile (3.0.8) in
>
>     github.com/mwette/guile-contrib/patch/3.0.8/mmap-api.patch
>
> It probably needs some review and update.  Maybe windows mmap-file 
> would be nice.
> I'm not sure I updated the configure correctly but --disable-mmap-api 
> should remove.
> It exposes features 'mmap-api and 'mmap-file.
>
> scheme@(guile-user)> ,d mmap
> - Scheme Procedure: mmap addr len [prot [flags [fd [offset]]]]
>      See the man page.  Returns a bytevector.  Note that the region
>      returned by mmap will NOT be searched by the garbage collector for
>      pointers.  See also mmap/search.  Defaults are:
>
>      prot
>           (logior PROT_READ PROT_WRITE)
>
>      flags
>           (logior MAP_ANON MAP_PRIVATE)
>
>      fd
>           -1
>
>      offset
>           0
>
> scheme@(guile-user)> ,d mmap/search
> - Scheme Procedure: mmap/search addr len [prot [flags [fd [offset]]]]
>      See the unix man page for mmap.  Returns a bytevector.  Note that
>      the region allocated will be searched by the garbage collector for
>      pointers.  Defaults:
>
>      prot
>           (logior PROT_READ PROT_WRITE)
>
>      flags
>           (logior MAP_ANON MAP_PRIVATE)
>
>      fd
>           -1
>
>      offset
>           0
>
> scheme@(guile-user)> ,d mmap-file
> - Scheme Procedure: mmap-file file [prot]
>      This procedure accepts a file in the form of filename, file-port or
>      fd.  It returns a bytevector.  It must not contain scheme allocated
>      objects as it will not be searched for pointers.  Default PROT is
>      `"r"'.
>
>