MPI_File_write_ordered - Online Linux Manual PageSection : 3
Updated : Jan 21, 2016
Source : 1.10.2
Note : Open MPI
NAMEMPI_File_write_ordered − Writes a file at a location specified by a shared file pointer (blocking, collective).
SYNTAXC Syntax #include <mpi.h>
int MPI_File_write_ordered(MPI_File fh, const 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 PARAMETERSfh 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 PARAMETERSstatus Status object (Status). IERROR Fortran only: Error status (integer).
DESCRIPTIONMPI_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.
ERRORSAlmost 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. 0
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