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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Try<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>> EnterCriticalSection(&CriticalSection);<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>> erlang_pid *channel_connection_pid = (erlang_pid *)dwUser;<br>
> ei_x_buff xbuf;<br>
> ei_x_new_with_version(&xbuf); <br>
> ei_x_encode_tuple_header(&xbuf,2);<br>
> ei_x_encode_atom(&xbuf,"data");<br>
> ei_x_encode_binary(&xbuf, pBuffer, dwBufSize);<br>
> ei_send(acceptedFd, channel_connection_pid, xbuf.buff,xbuf.index);<br>
> ei_x_free(&xbuf);<br>
> LeaveCriticalSection(&CriticalSection);<br>
</span></font><font size=2 color=navy face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards Eduardo<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=ES style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=ES style='font-size:
10.0pt;font-family:Tahoma;font-weight:bold'>De:</span></font></b><font size=2
face=Tahoma><span lang=ES style='font-size:10.0pt;font-family:Tahoma'> lang er
[mailto:erlangist@gmail.com] <br>
<b><span style='font-weight:bold'>Enviado el:</span></b> Jueves, 01 de Marzo de
2007 05:41 a.m.<br>
<b><span style='font-weight:bold'>Para:</span></b> <st1:PersonName
ProductID="Eduardo Figoli (" w:st="on">Eduardo Figoli (</st1:PersonName>INS)<br>
<b><span style='font-weight:bold'>CC:</span></b> erlang-questions@erlang.org<br>
<b><span style='font-weight:bold'>Asunto:</span></b> Re: [erlang-questions] ei_send
multithreaded problem</span></font><span lang=ES><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi, Eduardo<br>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I add a critical section before and after ei_send,now the code look
like this:<br>
<br>
<br>
> erlang_pid *channel_connection_pid = (erlang_pid *)dwUser;<br>
> ei_x_buff xbuf;<br>
> ei_x_new_with_version(&xbuf); <br>
> ei_x_encode_tuple_header(&xbuf,2);<br>
> ei_x_encode_atom(&xbuf,"data");<br>
> ei_x_encode_binary(&xbuf, pBuffer, dwBufSize);<br>
> EnterCriticalSection(&CriticalSection);<br>
> ei_send(acceptedFd, channel_connection_pid, xbuf.buff,xbuf.index);<br>
> LeaveCriticalSection(&CriticalSection);<br>
> ei_x_free(&xbuf);<br>
> <br>
<br>
<br>
now the mormal running time is longer, but Erlang side still got "ERROR
REPORT= Got invalid data on distribution channel, offending packet
is:" error eventually. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
I skip first 112 of the error message<<112,131,104,3,97...>>,
and use binary_to_term,get term like:<br>
<br>
<o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>{2,'',<4761.49.0>}<o:p></o:p></span></font></p>
</blockquote>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I search the maillisting again, and only get one post about this:<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a
href="http://www.erlang.org/pipermail/erlang-questions/2004-October/013383.html">http://www.erlang.org/pipermail/erlang-questions/2004-October/013383.html</a><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>It looks like this problem is solved by using mutex<br>
<a
href="http://www.erlang.org/pipermail/erlang-questions/2004-October/013385.html">http://www.erlang.org/pipermail/erlang-questions/2004-October/013385.html</a>
<br>
<br>
But I still have this problem.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Any help is appreciable!<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>BR<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>James<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
2007/2/27, lang er <<a href="mailto:erlangist@gmail.com">erlangist@gmail.com</a>>:<br>
> <br>
> But in the erl_interface document, it said:<br>
> <br>
> <br>
> > If you are using Erl Interface functions in a threaded application
based on POSIX threads or Solaris <br>
> > threads, then Erl Interface needs access to some of the
synchronization facilities in your threads <br>
> > package, and you will need to specify additional compiler flags in
order to indicate which of the <br>
> > packages you are using. Define REENTRANT and either STHREADS or
PTHREADS. The default is to use<br>
> > POSIX threads if REENTRANT is specified. <br>
> > Note that both single threaded and default versions of the Erl
interface and Ei libraries are provided. <br>
> > (The single threaded versions are named liberl interface st and libei
st). Whether the default<br>
> > versions of the libraries have support for threads or not is
determined by if the platform in question has <br>
> > support for POSIX or Solaris threads. To check this, have a look in
the <a href="http://eidefs.mk">eidefs.mk</a> file in the<br>
> > erl interface src directory.<br>
> <br>
> <br>
> I checked the <a href="http://eidefs.mk">eidefs.mk</a> file, its content
is:<br>
> <br>
> <br>
> <br>
> <br>
> <br>
> # Have the ei and erl_interface libs been compiled for threads?<br>
> EI_THREADS=true<br>
> <br>
> # Threads flags <br>
> THR_DEFS=-DWIN32_THREADS -DUSE_DECLSPEC_THREAD<br>
> <br>
> # Threads libs<br>
> THR_LIBS=<br>
> <br>
> # ----------------------------------------------------------------------<br>
> <br>
> <br>
> Doesn't it means I don't need use any synchronization facilities myself? <br>
> <br>
> Thanks!<br>
> <br>
> James<br>
> <br>
> 2007/2/26, <st1:PersonName ProductID="Eduardo Figoli (" w:st="on">Eduardo
Figoli (</st1:PersonName>INS) <<a href="mailto:eduardo@inswitch.us">eduardo@inswitch.us</a>>:
<br>
> <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > Have you tried using a critical section whenever calling ei_send?<br>
> > <br>
> > <br>
> > <br>
> > Regards, Eduardo<br>
> > <br>
> > <br>
> > <br>
> > ________________________________ <br>
<br>
> > <br>
> > De: <a href="mailto:erlang-questions-bounces@erlang.org">erlang-questions-bounces@erlang.org</a>
[mailto: <a href="mailto:erlang-questions-bounces@erlang.org">erlang-questions-bounces@erlang.org
</a>] En nombre de lang er<br>
> > Enviado el: Lunes, 26 de Febrero de 2007 01:05 p.m.<br>
> > <st1:place w:st="on">Para</st1:place>: <a
href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a><br>
> > Asunto: [erlang-questions] ei_send multithreaded problem <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > I'm writing a c node using ei layer. This program is running under
Window 2003 enterprise edition sp1, and otp_win32_R11B-3. The
following is a fragment of my code: <br>
> > <br>
> > <br>
> > <br>
> > --------------------------------------------------------------------<br>
> > <br>
> > erlang_pid *pid = (erlang_pid *)pUser;<br>
> > ei_x_buff xbuf; <br>
> > ei_x_new_with_version(&xbuf);<br>
> > ei_x_encode_tuple_header(&xbuf,2); <br>
> > ei_x_encode_atom(&xbuf,"data");<br>
> > ei_x_encode_binary(&xbuf, buffer, bufSize); <br>
> > ei_send(acceptedFd, pid, xbuf.buff,xbuf.index);<br>
> > ei_x_free(&xbuf);<br>
> > <br>
> >
----------------------------------------------------------------------<br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > It is called inside a C callback function and may be called by
many concurrent threads. pUser include a erlang_pid (correspond to a process in
Erlang side).When some data come from network, a third party library
will invoke this callback function, so ei_send pass these data
to a corresponding Erlang process.(This process is an Erlang equivalent to
a 3rd library thread. So if I start one process in Erlang side, the 3rd
library will use one thread. If I start more than one process in Erlang , the
3rd library will use same number of threads.) <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > Then, If I start one process in Erlang side, everything is OK.
But If I start more than one process, the C node program will crash after some
random time. If I comment out ei_send line in above code fragment,
everything is OK again. <br>
> > <br>
> > <br>
> > <br>
> > Do I miss anything to use ei_send in multithreaded environment?<br>
> > <br>
> > <br>
> > <br>
> > compiler: ms visual studio 2005<br>
> > <br>
> > debug mode use ei_mdd.lib <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > <br>
> > Thanks,<br>
> > <br>
> > James<br>
> > <br>
> > <br>
> <br>
> <br>
<br>
<o:p></o:p></span></font></p>
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