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MPI_File_read_at_all_end - Reads a file at explicitly specified
offsets; ending part of a split collective routine (blocking).
C Syntax
#include <mpi.h>
int MPI_File_read_at_all_end(MPI_File fh, void *buf,
MPI_Status *status)
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_FILE_READ_AT_ALL_END(FH, BUF, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, STATUS(MPI_STATUS_SIZE), IERROR
USE mpi_f08
MPI_File_read_at_all_end(fh, buf, status, ierror)
TYPE(MPI_File), INTENT(IN) :: fh
TYPE(*), DIMENSION(..), ASYNCHRONOUS :: buf
TYPE(MPI_Status) :: status
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
- fh
- File handle (handle).
- buf
- Initial address
of buffer (choice).
- status
- Status object (status).
- IERROR
- Fortran only: Error
status (integer).
MPI_File_read_at_all_end is a split collective
routine that stores the number of elements actually read from the file
associated with fh in status. MPI_File_read_at_all_end blocks until the
operation initiated by MPI_File_read_at_all_begin completes. The data is
taken out of those parts of the file specified by the current view. All
other fields of status are undefined.
All the nonblocking collective
routines for data access are "split" into two routines, each with _begin
or _end as a suffix. These split collective routines are subject to the
semantic rules described in Section 9.4.5 of the MPI-2 standard.
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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