65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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// "eoHeaderMessFrom.h"
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// (c) OPAC Team, LIFL, 2002
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/* This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Contact: cahon@lifl.fr
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*/
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#ifndef eoHeaderMessFrom_h
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#define eoHeaderMessFrom_h
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#include <string>
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#include <mpi.h>
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template <class EOT> class eoLocalListener ;
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/**
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A header is an identifier for the kind of
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message to be then received ...
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*/
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template <class EOT> class eoHeaderMessFrom : public std::string {
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public :
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/**
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Second constructor. On contrary, the header is
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waited for and built from the local listener.
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It comes before a message.
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*/
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eoHeaderMessFrom (eoLocalListener <EOT> & loc_listen) :
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comm (MPI :: COMM_WORLD) {
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MPI :: Status stat ;
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comm.Probe (loc_listen.number (), 0, stat) ; // Blocking
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int len = stat.Get_count (MPI :: CHAR) ;
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char buff [len] ; // Temp. buffer
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comm.Recv (buff, len, MPI :: CHAR, loc_listen.number (), 0) ;
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assign (buff) ;
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}
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private :
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MPI :: Comm & comm ; // Communicator
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} ;
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#endif
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