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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Offered for comment….<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The attached patch against spread-src-4.0.0rc2 adds the
ability to create private event queues. This is mostly interesting in
situations where applications use spread and the event queues at multiple levels,
such as a top level spread application that also uses a library that makes use
of spread. Separating event queues and event loops between these protocol
levels is necessary to avoid deadlocks where some top level application is
waiting on a lower level application which is waiting on a spread message which
is queued behind a message sent to the top level application. By creating
an event queue and separate event thread for the top level application and
lower level library this situation is avoided.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The patch maintains the existing E_*() routines, but they
are now wrappers around the added E_*_eq() routines() and use a statically
declared default event queue, so no source modifications should be necessary for
existing spread applications that are not layered.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>t.<o:p></o:p></span></font></p>
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