On 3/26/2020 12:03 PM, Norton Allen wrote:
On 3/26/2020 11:11 AM, Ken Brown via Cygwin wrote:
BTW, I've been working on adding support for multiple readers. I expect to
have a first cut ready within a week or two. Would you have any use for
that? If so, I could revive the topic/fifo branch and push my patches there
for you to test.
Ken, what are the semantics for multiple readers? Do all readers see the same
data, or is it first come first served or something else?
It's first come, first served. If two readers attempt to read simultaneously,
it's possible that one will get some of the available input and the other will
get some more.
The only use case for multiple readers that I've come across of is Midnight
Commander running under tcsh. I didn't dig into the code enough to know why
they do it, or why only under tcsh. See
https://sourceware.org/pipermail/cygwin/2019-December/243317.html
and
https://cygwin.com/pipermail/cygwin-apps/2019-December/039777.html
That's what got me interested in this. It would be nice to know if there are
other use cases.
Ken
--
Problem reports: https://cygwin.com/problems.html
FAQ: https://cygwin.com/faq/
Documentation: https://cygwin.com/docs.html
Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
