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<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff size=2>Hi
Greg,</FONT></SPAN></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff size=2>Thanks
for the PROBLEM-REPORT-FORM.</FONT></SPAN></DIV>
<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff size=2>Doug
poked me to see if I remembered this type of problem. Your description looks
familiar - I've a feeling we've been down this road before, but can't recall the
details. Could you please scan through the ACE_wrappers/ChangeLogs files for
changes in this area to see if we've tried this fix before?</FONT></SPAN></DIV>
<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=856210721-29112007><FONT face=Arial color=#0000ff
size=2>Thanks!<BR>-Steve</FONT></SPAN></DIV><!-- Converted from text/plain format -->
<P><FONT size=2>--<BR>Steve Huston, Riverace Corporation<BR>Want to take ACE
training on YOUR schedule?<BR>See <A
href="http://www.riverace.com/training.htm">http://www.riverace.com/training.htm</A><BR></FONT></P>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
ace-bugs-bounces@cse.wustl.edu [mailto:ace-bugs-bounces@cse.wustl.edu] <B>On
Behalf Of </B>Greg Popovitch<BR><B>Sent:</B> Thursday, November 29, 2007 2:23
PM<BR><B>To:</B> ace-bugs@cse.wustl.edu<BR><B>Subject:</B> [ace-bugs] trying
to fix an ACE hang<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal>Hi,<o:p></o:p></P>
<P class=MsoNormal> <o:p></o:p></P>
<P class=MsoNormal>I have a hang on Windows Vista 64 and also on linux 64
(RHEL 4). <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>One thread is enqueuing a message on an ACE_Message_Queue
for another thread and hangs on the notification to the WFMO reactor. The
ACE_WFMO_Reactor_Notify::notify() hangs because its internal message
queue is full.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>The other thread hangs while checking of the message_queue
is empty because it can’t grab its ACE_GUARD. Therefore it can’t dequeue
messages from the WFMO_Reactor.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>My question: <o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>In file Message_Queue_T.cpp,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Would it be OK to move the “this->notify ()” outside of
the scope of the ACE_GUARD in:<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>template <ACE_SYNCH_DECL> int<o:p></o:p></P>
<P class=MsoNormal>ACE_Message_Queue<ACE_SYNCH_USE>::enqueue_head
(ACE_Message_Block *new_item,<o:p></o:p></P>
<P
class=MsoNormal>
ACE_Time_Value *timeout)<o:p></o:p></P>
<P class=MsoNormal>{<o:p></o:p></P>
<P class=MsoNormal> ACE_TRACE
("ACE_Message_Queue<ACE_SYNCH_USE>::enqueue_head");<o:p></o:p></P>
<P class=MsoNormal> int queue_count = 0;<o:p></o:p></P>
<P class=MsoNormal> {<o:p></o:p></P>
<P class=MsoNormal> ACE_GUARD_RETURN (ACE_SYNCH_MUTEX_T,
ace_mon, this->lock_, -1);<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> if (this->state_ ==
ACE_Message_Queue_Base::DEACTIVATED)<o:p></o:p></P>
<P class=MsoNormal> {<o:p></o:p></P>
<P class=MsoNormal> errno =
ESHUTDOWN;<o:p></o:p></P>
<P class=MsoNormal> return
-1;<o:p></o:p></P>
<P class=MsoNormal> }<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> if (this->wait_not_full_cond
(ace_mon, timeout) == -1)<o:p></o:p></P>
<P class=MsoNormal> return -1;<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> queue_count = this->enqueue_head_i
(new_item);<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> if (queue_count == -1)<o:p></o:p></P>
<P class=MsoNormal> return -1;<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> this->notify ();
//******** move after closing brace below ??? ******<o:p></o:p></P>
<P class=MsoNormal> }<o:p></o:p></P>
<P class=MsoNormal> return queue_count;<o:p></o:p></P>
<P class=MsoNormal>}<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> ACE VERSION: 5.6<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> HOST MACHINE and OPERATING
SYSTEM:<o:p></o:p></P>
<P class=MsoNormal> Vindows
Vista<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> TARGET MACHINE and OPERATING SYSTEM, if
different from HOST:<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal> COMPILER NAME AND VERSION (AND
PATCHLEVEL):<o:p></o:p></P>
<P class=MsoNormal> Visual Studio
2005<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>greg<o:p></o:p></P></DIV></BLOCKQUOTE></BODY></HTML>