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MPI_File_read_ordered_end - Reads a file at a location specified by
a shared file pointer; ending part of a split collective routine (blocking).
C Syntax
#include <mpi.h>
int MPI_File_read_ordered_end(MPI_File fh, void *buf,
MPI_Status *status)
INCLUDE ’mpif.h’
MPI_FILE_READ_ORDERED_END(FH, BUF, STATUS, IERROR)
<type> BUF(*)
INTEGER FH, STATUS(MPI_STATUS_SIZE), IERROR
#include <mpi.h>
void MPI::File::Read_ordered_end(void* buf, MPI::Status& status)
void MPI::File::Read_ordered_end(void* buf)
- fh
- File handle (handle).
- buf
- Initial address of buffer (choice).
- status
- Status object (status).
- IERROR
- Fortran only: Error status (integer).
MPI_File_read_ordered_end
is the ending part of a split collective routine that must be called by
all processes in the communicator group associated with the file handle
fh. MPI_File_rad_ordered_end blocks until the operation initiated by MPI_File_read_ordered_begin
completes. It attempts to read the file associated with fh into the user’s
buffer buf. The shared file pointer is updated by the amounts of data requested
by all processes of the group. For each process, the location in the file
at which data is read 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 read their data.
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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