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MPI_File_read_all(3) man page (version 1.2.9)

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NAME

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

SYNTAX

       C Syntax
           #include <mpi.h>
           int MPI_File_read_all(MPI_File fh, void *buf,
                  int count, MPI_Datatype datatype, MPI_Status *status)

       Fortran Syntax
           INCLUDE 'mpif.h'
           MPI_FILE_READ_ALL( FH,  BUF, COUNT,
                   DATATYPE, STATUS,  IERROR)
             <type>        BUF(*)
             INTEGER  FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE),
                      IERROR

C++ Syntax

       #include <mpi.h>
       void MPI::File::Read_all(void* buf, int count,
            const MPI::Datatype& datatype, MPI::Status& status)

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

INPUT PARAMETERS

       fh        File handle (handle).

       count     Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).

OUTPUT PARAMETERS

       buf       Initial address of buffer (choice).

       status    Status object (status).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_read_all 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.
       MPI_File_read_all 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 MPI_MODE_SEQUENTIAL  mode  was
       specified when the file was opened.

       called. For MPI I/O function errors, the default error handler  is  set
       to   MPI_ERRORS_RETURN.   The   error   handler  may  be  changed  with
       MPI_File_set_errhandler;     the     predefined      error      handler
       MPI_ERRORS_ARE_FATAL  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     MPI_File_read_all(3OpenMPI)

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