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digitalmars.D.bugs - [Issue 4344] New: Sockets with multiple threads report missing/failed WSAStartup

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4344

           Summary: Sockets with multiple threads report missing/failed
                    WSAStartup
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: epi atari8.info


--- Comment #0 from Adrian Matoga <epi atari8.info> 2010-06-18 21:02:30 PDT ---
Created an attachment (id=666)
source for server and client to reproduce this issue

Hello,

I encountered a strange problem dealing with sockets and threads under Windows
(I use 64-bit 7 Pro).
The server socket successfully accepts a connection and passes obtained socket
to newly created thread, which deals with it correctly.
However, the server socket then breaks with the exception on any next
operation.
The SocketException.errorCode is always 10093, which stands for missing or
failed WSAStartup. Indeed, when I place WSAStartup after accepting connection,
it works well (but most probably needs matching WSACleanup() call).
The single-threaded version also presents no problems.
I tried with DMD 2.046 and 2.047 with same result.
I attach example sources of both server and client showing the issue.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=4344


godmyoh <menodinulla gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |menodinulla gmail.com


--- Comment #1 from godmyoh <menodinulla gmail.com> 2010-07-10 21:17:09 PDT ---
I also encountered same problem on Winsows XP.

Sample:
----------------------------------------------------
import core.thread;
import std.socket;

void main()
{
    auto thread = new Thread({});
    thread.start();
    thread.join();

    auto socket = new TcpSocket;
}
----------------------------------------------------

Results:
----------------------------------------------------
std.socket.SocketException: Unable to create socket
----------------------------------------------------

And I found following code in /trunk/phobos/std/socket.d.

193 static ~this() 
194 { 
195     version(Win32) 
196     { 
197         WSACleanup(); 
198     } 
199 } 
200 

I think that "shared static ~this()" is correct.

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Rainer Schuetze <r.sagitario gmx.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |r.sagitario gmx.de


--- Comment #2 from Rainer Schuetze <r.sagitario gmx.de> 2010-08-10 01:34:13
PDT ---
After several hours of debugging I found the problem with the non-shared
destructor aswell.

"shared static ~this" seems to do the trick for now, but when building a DLL,
unloading it will also kill connections of the whole application. I'd say the
calls to WSAStartup and WSACleanup should be explicite.

Fortunately, in my case, the DLL is never unloaded...

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Steven Schveighoffer <schveiguy yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |schveiguy yahoo.com
         Resolution|                            |FIXED


--- Comment #3 from Steven Schveighoffer <schveiguy yahoo.com> 2010-10-19
06:18:55 PDT ---
Fixed in changeset http://www.dsource.org/projects/phobos/changeset/2107

This does not fix the DLL issue, but phobos is not DLL friendly anyways.  If
you wish, open a separate issue for that.

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Stephan Dilly <spam extrawurst.org> changed:

           What    |Removed                     |Added
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                 CC|                            |b599400 lhsdv.com


--- Comment #4 from Stephan Dilly <spam extrawurst.org> 2010-10-30 18:08:34 PDT
---
*** Issue 4975 has been marked as a duplicate of this issue. ***

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Steven Schveighoffer <schveiguy yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |debio264 gmail.com


--- Comment #5 from Steven Schveighoffer <schveiguy yahoo.com> 2010-11-08
05:18:37 PST ---
*** Issue 5183 has been marked as a duplicate of this issue. ***

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