MPI_Win_get_attr(3)                Open MPI                MPI_Win_get_attr(3)



NAME
       MPI_Win_get_attr - Obtains the value of a window attribute.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Win_get_attr(MPI_Win win, int win_keyval,
            void *attribute_val, int *flag)


Fortran Syntax (see FORTRAN 77 NOTES)
       INCLUDE 'mpif.h'
       MPI_WIN_GET_ATTR(WIN, WIN_KEYVAL, ATTRIBUTE_VAL, FLAG, IERROR)
            INTEGER WIN, WIN_KEYVAL, IERROR
            INTEGER(KIND=MPI_ADDRESS_KIND) ATTRIBUTE_VAL
            LOGICAL FLAG


C++ Syntax
       #include <mpi.h>
       bool MPI::Win::Get_attr(int win_keyval, void* attribute_val) const


INPUT PARAMETERS
       win       Window to which the attribute is attached (handle).

       win_keyval
                 Key value (integer).


OUTPUT PARAMETERS
       attribute_val
                 Attribute value, unless ag = false

       flag      False if no attribute is associated with the key (logical).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       Obtains the value of a window attribute.

FORTRAN 77 NOTES
       The MPI standard prescribes portable Fortran syntax for the
       ATTRIBUTE_VAL argument only for Fortran 90. FORTRAN 77 users may use
       the non-portable syntax

            INTEGER*MPI_ADDRESS_KIND ATTRIBUTE_VAL

       where MPI_ADDRESS_KIND is a constant defined in mpif.h and gives the
       length of the declared integer in bytes.


ERRORS
       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. By default, this error handler aborts the MPI job, except for
       I/O function errors. The error handler may be changed with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
       may be used to cause error values to be returned. Note that MPI does
       not guarantee that an MPI program can continue past an error.




1.4.1                            Jan 14, 2010              MPI_Win_get_attr(3)
