MPIFilereadall(3OpenMPI) MPIFilereadall(3OpenMPI)

NAME
       MMPPIIFFiilleerreeaaddaallll - Reads a file starting at the locations specified by
       individual file pointers (blocking, collective).


SSYYNNTTAAXX
       C Syntax
           #include 
           int MPIFilereadall(MPIFile fh, void *buf,
                  int count, MPIDatatype datatype, MPIStatus *status)

       Fortran Syntax
           INCLUDE 'mpif.h'
           MPIFILEREADALL( FH,  BUF, COUNT,
                   DATATYPE, STATUS,  IERROR)
                     BUF(*)
             INTEGER  FH, COUNT, DATATYPE, STATUS(MPISTATUSSIZE),
                      IERROR


CC++++ SSyynnttaaxx
       #include 
       void MPI::File::Readall(void* buf, int count,
            const MPI::Datatype& datatype, MPI::Status& status)

       void MPI::File::Readall(void* buf, int count,
            const MPI::Datatype& datatype)


IINNPPUUTT PPAARRAAMMEETTEERRSS
       fh        File handle (handle).

       count     Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       buf       Initial address of buffer (choice).

       status    Status object (status).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIFilereadall is a collective routine that attempts  to  read  from
       the  file  associated  with  fh (at the current individual file pointer
       position maintained by the system) a total number of count  data  items
       having datatype type into the user's buffer buf.  The data is taken out
       of  those  parts  of  the  file  specified   by   the   current   view.
       MPIFilereadall stores the number of data-type elements actually read
       in status.  All other fields of status are undefined.

       It is erroneous to call this function if MPIMODESEQUENTIAL  mode  was
       specified when the file was opened.


EERRRROORRSS
       Almost  all MPI routines return an error value; C routines as the value
       of the function and Fortran routines in the last  argument.  C++  func-
       tions  do  not  return  errors.  If the default error handler is set to
       MPI::ERRORSTHROWEXCEPTIONS, then on error the C++ exception mechanism
       will be used to throw an MPI:Exception object.

       Before  the  error  value is returned, the current MPI error handler is
       called. For MPI I/O function errors, the default error handler  is  set
       to   MPIERRORSRETURN.   The   error   handler  may  be  changed  with
       MPIFileseterrhandler;     the     predefined      error      handler
       MPIERRORSAREFATAL  may  be  used to make I/O errors fatal. Note that
       MPI does not guarantee that an MPI program can continue past an  error.





Open MPI 1.2                    September 2006     MPIFilereadall(3OpenMPI)