NAME

       MPI_File_iwrite_all  -  Writes a file starting at the location specified by the individual
       file pointer (nonblocking, collective).

SYNTAX

C Syntax

       #include  <mpi.h>  int  MPI_File_iwrite_all(MPI_File  fh,  const  void  *buf,  int  count,
            MPI_Datatype datatype, MPI_Request *request)

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_FILE_IWRITE_ALL(FH, BUF, COUNT, DATATYPE, REQUEST, IERROR)
            <type>    BUF(*)
            INTEGER   FH, COUNT, DATATYPE, REQUEST, IERROR

INPUT/OUTPUT PARAMETER

       fh        File handle (handle).

INPUT PARAMETERS

       buf       Initial address of buffer (choice).

       count     Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).

OUTPUT PARAMETER

       request   Request object (handle).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_iwrite_all  is  a  nonblocking  version  of  the MPI_File_write_all interface. It
       attempts to write into 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
       from the user's buffer buf.  The data is written into those parts of the file specified by
       the  current  view.  MPI_File_iwrite_all  stores  the number of datatype elements actually
       written 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 open.

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.