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digitalmars.D.bugs - [Issue 4365] New: Shared receive for all waitable objects

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4365

           Summary: Shared receive for all waitable objects
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: pjdeets2 gmail.com


--- Comment #0 from Phil Deets <pjdeets2 gmail.com> 2010-06-22 03:04:28 PDT ---
I would like the ability to have the same thread block on a socket and block on
cross-thread messages at the same time. Currently, the receive function in
std.concurrency and the receive function in std.socket are not tied together at
all, so I don't think this is possible without modification to the standard
library.

Thanks,
Phil Deets

Disclaimer: I work for Microsoft, but I am not representing them in any way by
this post.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4365


Vladimir Panteleev <thecybershadow gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |thecybershadow gmail.com
         Resolution|                            |WONTFIX


--- Comment #1 from Vladimir Panteleev <thecybershadow gmail.com> 2011-08-23
22:15:02 PDT ---
Heh, the coveted One True Event Loop... unless you can get select() and
whatever synchronization primitives various platforms use to play together,
this isn't going to happen. Since you've decided to mention that you work for
Microsoft, let's look at Windows specifically - I don't see a
WSASelectAndWaitForMultipleObjects function anywhere. You'll just need to put
your event loops in different threads and make one pass its events to whichever
you pick as your "main" one (or alternatively, use a lock on the global state
and process events in the same thread).

If anyone has any realistic ideas, feel free to reopen.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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--- Comment #2 from Phil Deets <pjdeets2 gmail.com> 2011-08-28 05:12:28 PDT ---
I'm not an expert in Windows sockets, but I think this might actually be doable
in Windows. The select function does synchronous IO; so it isn't possible with
that, but I think if you use other functions (WSAEventSelect looks promising),
you can associate the wait with a handle that you can use with
WaitForMultipleObjects. I won't reopen the bug though as this isn't very
important to me anymore.

As for the disclaimer, I was newer to the job then and was perhaps a bit overly
cautious about how I handled Internet communications.

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--- Comment #3 from Vladimir Panteleev <thecybershadow gmail.com> 2011-08-28
12:20:40 PDT ---
Good point with WSAEventSelect. Still, it'd need some major refactoring,
special-casing Windows, and we still don't know how to do this on POSIX
(getting pthreads and select to work together, I guess). Web search results on
the topic aren't very inspiring: http://www.google.com/search?q=pthreads+select

Creating two threads with each processing its type of events still seems the
way to go.

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