On Wed, Apr 20, 2016 at 6:27 AM, David Turner <dtur...@twopensource.com> wrote:
> Shared memory is done by storing files in a per-repository temporary
> directory.  This is more portable than shm (which requires
> posix-realtime and has various quirks on OS X).  It might even work on
> Windows, although this has not been tested.

There's another option, but I'm not sure if it's too clever/tricky to
do. Anyway, on *nix we can send file descriptors over unix socket [2],
then mmap them back to access content. On Windows, it looks like
DuplicateHandle [1] can do nearly the same thing. This keeps
everything in memory and we don't have to worry about cleaning up
shm-* files.

[1] 
http://lackingrhoticity.blogspot.com/2015/05/passing-fds-handles-between-processes.html
[2] http://www.normalesup.org/~george/comp/libancillary/
-- 
Duy
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