mpi_file_write_at_all(3openmpi) [osx man page]

MPI_File_write_at_all(3OpenMPI) 										   MPI_File_write_at_all(3OpenMPI)

NAME

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

SYNTAX

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

       Fortran Syntax (see FORTRAN 77 NOTES)
	   INCLUDE 'mpif.h'
	   MPI_FILE_WRITE_AT_ALL(FH,  OFFSET,  BUF, COUNT,
		   DATATYPE, STATUS,  IERROR)
	     <type> BUF(*)
	     INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
	     INTEGER(KIND=MPI_OFFSET_KIND) OFFSET

C++ Syntax
       #include <mpi.h>
       void MPI::File::Write_at_all(MPI::Offset offset, const void* buf,
	    int count, const MPI::Datatype& datatype,
	    MPI::Status& status)

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

INPUT PARAMETERS

       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).

OUTPUT PARAMETERS

       status	 Status object (status).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION

       MPI_File_write_at_all 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.
       MPI_File_write_at_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 opened.

FORTRAN 77 NOTES
       The MPI standard prescribes portable Fortran syntax for the OFFSET argument only for Fortran 90.  FORTRAN 77 users may use the non-portable
       syntax

	    INTEGER*MPI_OFFSET_KIND OFFSET

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

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++ func-
       tions 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.

Open MPI 1.2							  September 2006				   MPI_File_write_at_all(3OpenMPI)