[Boost-bugs] [Boost C++ Libraries] #4348: [Boost.MPI] wait_any and wait_some don't wait at all

Subject: [Boost-bugs] [Boost C++ Libraries] #4348: [Boost.MPI] wait_any and wait_some don't wait at all
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-06-16 07:50:34

#4348: [Boost.MPI] wait_any and wait_some don't wait at all
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 Reporter:  Didier Devaurs <ddevaurs@…>               |       Owner:  dgregor
     Type:  Bugs                                      |      Status:  new    
Milestone:  Boost 1.43.0                              |   Component:  mpi    
  Version:  Boost 1.43.0                              |    Severity:  Problem
 Keywords:                                            |  
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 Hello,
 The functions wait_any and wait_some don't work properly. If they were
 really waiting for a request to be completed (like wait_all is doing) the
 program below would hang indefinitely.
 Currently, the function wait_any tests the requests, and since none is
 completed, returns -1. So it simply implements a test_all function.


 int main()
 {
   boost::mpi::environment environment;

   boost::mpi::communicator world;

   int processNumber = world.size();

   if (world.rank() == 0) {
     boost::mpi::request requests[processNumber];

     for (int source = 1; source < processNumber; ++source)
       requests[source] = world.irecv(source, 0);
     std::cout << boost::mpi::wait_any(requests, requests +
 processNumber).first.source();
   }
   return 0;
 }


 Didier Devaurs

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4348>
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