NAME

       MPI_File_read_ordered_end - Reads a file at a location specified by a shared file pointer;
       ending part of a split collective routine (blocking).

SYNTAX

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

Fortran Syntax

           INCLUDE 'mpif.h'
           MPI_FILE_READ_ORDERED_END(FH, BUF, STATUS, IERROR)
                 <type>         BUF(*)
                 INTEGER        FH, STATUS(MPI_STATUS_SIZE), IERROR

C++ Syntax

       #include <mpi.h>
       void MPI::File::Read_ordered_end(void* buf, MPI::Status& status)

       void MPI::File::Read_ordered_end(void* buf)

INPUT/OUTPUT PARAMETER

       fh        File handle (handle).

OUTPUT PARAMETERS

       buf       Initial address of buffer (choice).

       status    Status object (status).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_read_ordered_end is the ending part of a split collective routine  that  must  be
       called  by  all  processes  in  the communicator group associated with the file handle fh.
       MPI_File_rad_ordered_end     blocks     until     the     operation      initiated      by
       MPI_File_read_ordered_begin  completes.  It  attempts  to read the file associated with fh
       into the user's buffer buf.  The shared file pointer is updated by  the  amounts  of  data
       requested  by  all  processes  of the group. For each process, the location in the file at
       which data is read is the position at which the shared file pointer  would  be  after  all
       processes  whose  ranks within the group are less than that of this process had read their
       data.

NOTES

       All the nonblocking collective routines for data access are  "split"  into  two  routines,
       each  with  _begin or _end as a suffix. These split collective routines are subject to the
       semantic rules described in Section 9.4.5 of the MPI-2 standard.

ERRORS

       Almost all MPI routines return an error value; C routines as the value of the function and
       Fortran  routines in the last argument. C++ functions do not return errors. If the default
       error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, 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 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.