NAME¶
MPI_Win_get_group - Returns a duplicate of the group of a window
SYNOPSIS¶
#include <mpi.h>
int MPI_Win_get_group(MPI_Win win, MPI_Group *group)
- win
- - window object (handle)
- group
- - group of processes which share access to the window
(handle)
NOTES¶
MPI_WIN_GET_GROUP returns a duplicate of the group of the communicator used to
create the window. associated with win. The group is returned in group.
NOTES FOR FORTRAN¶
All MPI routines in Fortran (except for
MPI_WTIME and
MPI_WTICK )
have an additional argument
ierr at the end of the argument list.
ierr is an integer and has the same meaning as the return value of the
routine in C. In Fortran, MPI routines are subroutines, and are invoked with
the
call statement.
All MPI objects (e.g.,
MPI_Datatype ,
MPI_Comm ) are of type
INTEGER in Fortran.
USAGE WITH IMPI EXTENSIONS¶
The IMPI standard only supports MPI-1 functions. Hence, this function is
currently not designed to operate within an IMPI job.
ERRORS¶
If an error occurs in an MPI function, the current MPI error handler is called
to handle it. By default, this error handler aborts the MPI job. The error
handler may be changed with
MPI_Errhandler_set ; the predefined error
handler
MPI_ERRORS_RETURN may be used to cause error values to be
returned (in C and Fortran; this error handler is less useful in with the C++
MPI bindings. The predefined error handler
MPI::ERRORS_THROW_EXCEPTIONS
should be used in C++ if the error value needs to be recovered). Note that MPI
does
not guarantee that an MPI program can continue past an error.
All MPI routines (except
MPI_Wtime and
MPI_Wtick ) return an error
value; C routines as the value of the function and Fortran routines in the
last argument. The C++ bindings for MPI do not return error values; instead,
error values are communicated by throwing exceptions of type
MPI::Exception (but not by default). Exceptions are only thrown if the
error value is not
MPI::SUCCESS .
Note that if the
MPI::ERRORS_RETURN handler is set in C++, while MPI
functions will return upon an error, there will be no way to recover what the
actual error value was.
- MPI_SUCCESS
- - No error; MPI routine completed successfully.
- MPI_ERR_WIN
- - Invalid window. A common error is to use a null window in
a call.
- MPI_ERR_ARG
- - Invalid argument. Some argument is invalid and is not
identified by a specific error class. This is typically a NULL pointer or
other such error.
SEE ALSO¶
MPI_Put(3),
MPI_Get(3),
MPI_Win_create(3),
MPI_Win_start(3),
MPI_Win_complete(3),
MPI_Win_fence(3),
MPI_Win_free(3),
MPI_Accumulate(3),
MPI_Win_get_group(3),
MPI_Win_wait(3)
For more information, please see the official MPI Forum web site, which contains
the text of both the MPI-1 and MPI-2 standards. These documents contain
detailed information about each MPI function (most of which is not duplicated
in these man pages).
http://www.mpi-forum.org/
LOCATION¶
wgroup.c