EcrFicPartageMPIIO.h

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#ifndef EcrFicPartageMPIIO_included
#define EcrFicPartageMPIIO_included
 
#include <comm_incl.h>
#include <SFichier.h>
 
/*! @brief Class to use MPI-IO to write in a single file
 *
 */
class EcrFicPartageMPIIO : public SFichier
{
  // Parallel write in a shared file with MPIIO
  Declare_instanciable_sans_constructeur_ni_destructeur(EcrFicPartageMPIIO);
public:
  EcrFicPartageMPIIO();
  ~EcrFicPartageMPIIO() override;
#ifdef MPI_
  EcrFicPartageMPIIO(const char* name,IOS_OPEN_MODE mode=ios::out);
  int ouvrir(const char* name,IOS_OPEN_MODE mode=ios::out) override;
  void close();
  // Useless with MPIIO:
  inline Sortie& lockfile() override { return *this; }
  inline Sortie& unlockfile() override { return *this; }
  inline Sortie& syncfile() override { return *this; }
  inline Sortie& flush() override { return *this; }
 
  // Check method when using some public methods:
  void check();
 
  Sortie& operator <<(const Separateur& ob) override;
 
  Sortie& operator <<(const int ob) override;
  Sortie& operator <<(const unsigned ob) override;
  Sortie& operator <<(const long ob) override;
  Sortie& operator <<(const long long ob) override;
  Sortie& operator <<(const unsigned long ob) override;
 
  Sortie& operator <<(const float ob) override;
  Sortie& operator <<(const double ob) override;
  Sortie& operator <<(const Objet_U& ob) override;
  Sortie& operator <<(const char* ob) override;
  Sortie& operator <<(const std::string& str) override;
 
  int put(const unsigned* ob, std::streamsize n, std::streamsize pas) override;
  int put(const int* ob, std::streamsize n, std::streamsize pas) override;
  int put(const long* ob, std::streamsize n, std::streamsize pas) override;
  int put(const long long* ob, std::streamsize n, std::streamsize pas) override;
  int put(const float* ob, std::streamsize n, std::streamsize pas) override;
  int put(const double* ob, std::streamsize n, std::streamsize pas) override;
 
private:
  void write(MPI_Datatype, const void*);
  int put(MPI_Datatype, const void*, int);
  MPI_File mpi_file_;
  MPI_Status mpi_status_;
  MPI_Offset disp_; // Displacement of the individual pointers (in bytes)
#endif
};
 
#endif