MPIFilewriteatall(3OpenMPI) MPIFilewriteatall(3OpenMPI)

NAME
       MMPPIIFFiilleewwrriitteeaattaallll  -  Writes a file at explicitly specified offsets
       (blocking, collective).


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

       Fortran Syntax (see FORTRAN 77 NOTES)
           INCLUDE 'mpif.h'
           MPIFILEWRITEATALL(FH,  OFFSET,  BUF, COUNT,
                   DATATYPE, STATUS,  IERROR)
              BUF(*)
             INTEGER FH, COUNT, DATATYPE, STATUS(MPISTATUSSIZE), IERROR
             INTEGER(KIND=MPIOFFSETKIND) OFFSET


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

       void MPI::File::Writeatall(MPI::Offset offset, const void* buf,
            int count, const MPI::Datatype& datatype)


IINNPPUUTT PPAARRAAMMEETTEERRSS
       fh        File handle (handle).

       offset    File offset (integer).

       buf       Initial address of buffer (choice).

       count     Number of elements in buffer (integer).

       datatype  Data type of each buffer element (handle).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       status    Status object (status).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIFilewriteatall is a collective routine that  attempts  to  write
       into  the file associated with fh (at the offset position) a total num-
       ber of count data items having datatype type  from  the  user's  buffer
       buf.   The  offset is in etype units relative to the current view. That
       is, holes are not counted when locating an offset. The data is  written
       into   those   parts  of  the  file  specified  by  the  current  view.
       MPIFilewriteatall 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 MPIMODESEQUENTIAL mode was
       specified when the file was opened.


FFOORRTTRRAANN 7777 NNOOTTEESS
       The MPI standard prescribes portable  Fortran  syntax  for  the  OFFSET
       argument  only for Fortran 90.  FORTRAN 77 users may use the non-porta-
       ble syntax

            INTEGER*MPIOFFSETKIND OFFSET

       where MPIOFFSETKIND is a constant defined in  mpif.h  and  gives  the
       length of the declared integer in bytes.


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 MPIFilewriteatall(3OpenMPI)