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MPI_File_write_all - Writes a file starting at the locations
specified by individual file pointers (blocking, collective).
C Syntax
#include <mpi.h>
int MPI_File_write_all(MPI_File fh, const void *buf,
int count, MPI_Datatype datatype, MPI_Status *status)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_FILE_WRITE_ALL(FH, BUF, COUNT,
DATATYPE, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE), IERROR
USE mpi_f08
MPI_File_write_all(fh, buf, count, datatype, status, ierror)
TYPE(MPI_File), INTENT(IN) :: fh
TYPE(*), DIMENSION(..), INTENT(IN) :: buf
INTEGER, INTENT(IN) :: count
TYPE(MPI_Datatype), INTENT(IN) :: datatype
TYPE(MPI_Status) :: status
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- 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).
- status
- Status object (status).
- IERROR
- Fortran only: Error status (integer).
MPI_File_write_all
is a collective routine that 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_write_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.
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.
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