MpiFileIo.h

#ifndef UTIL_MPI_FILE_IO_H
#define UTIL_MPI_FILE_IO_H
 
/*
* Util Package - C++ Utilities for Scientific Computation
*
* Copyright 2010 - 2017, The Regents of the University of Minnesota
* Distributed under the terms of the GNU General Public License.
*/
 
#include <util/global.h>
 
#include <iostream>
#include <string>
 
namespace Util
{
 
   class MpiFileIo
   {
 
   public:
 
      MpiFileIo();
 
      MpiFileIo(const MpiFileIo& other);
 
      bool isIoProcessor() const;
 
      #ifdef UTIL_MPI
      void setIoCommunicator(MPI::Intracomm& communicator);
 
      void clearCommunicator();
 
      bool hasIoCommunicator() const;
 
      MPI::Intracomm& ioCommunicator() const;
      #endif
 
   private:
 
      bool isIoProcessor_;
 
      #ifdef UTIL_MPI
      MPI::Intracomm* communicatorPtr_;
      #endif
 
   };
 
   // Inline methods
 
   /*
   * Should this processor do file I/O ?
   */
   inline bool MpiFileIo::isIoProcessor() const
   {  return isIoProcessor_; }
 
   #ifdef UTIL_MPI
   /*
   * Does this processor have a communicator?
   */
   inline bool MpiFileIo::hasIoCommunicator() const
   {  return (communicatorPtr_ != 0); }
 
   /*
   * Get the communicator.
   */
   inline MPI::Intracomm& MpiFileIo::ioCommunicator() const
   {
      assert(communicatorPtr_);  
      return *communicatorPtr_; 
   }
   #endif
}
 
#endif