MPI_File_write_ordered(3OpenMPI) MPI_File_write_ordered(3OpenMPI)
NAME
MPI_File_write_ordered - Writes a file at a location specified by a
shared file pointer (blocking, collective).
SYNTAX
C Syntax
#include <mpi.h>
int MPI_File_write_ordered(MPI_File fh, void *buf,
int count, MPI_Datatype datatype,
MPI_Status *status)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_FILE_WRITE_ORDERED(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::Write_ordered(const void* buf, int count,
const MPI::Datatype& datatype, MPI::Status& status)
void MPI::File::Write_ordered(const void* buf, int count,
const MPI::Datatype& datatype)
INPUT PARAMETERS
fh File handle (handle).
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_ordered is a collective routine. This routine must be
called by all processes in the communicator group associated with the
file handle fh. Each process may pass different argument values for
the datatype and count arguments. Each process attempts to write, into
the file associated with fh, a total number of count data items having
datatype type contained in the user's buffer buf. For each process,
the location in the file at which data is written 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 written their
data. MPI_File_write_ordered returns the number of datatype elements
written in status. The shared file pointer is updated by the amounts
of data requested by all processes of the group.
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 2006MPI_File_write_ordered(3OpenMPI)
Mac OS X 10.6 - Generated Thu Sep 17 20:13:03 CDT 2009