Synopsis

int MPI_Win_get_attr(MPI_Win win, int win_keyval, void *attribute_val, 
                    int *flag)

Input Parameters

win

window to which the attribute is attached (handle)

win_keyval

key value (integer)

Output Parameters

attribute_val

attribute value, unless flag is false

flag

false if no attribute is associated with the key (logical)

Notes

MPI_WIN_BASE

window base address.

MPI_WIN_SIZE

window size, in bytes.

MPI_WIN_DISP_UNIT

displacement unit associated with the window.

Thread and Interrupt Safety

This routine is thread-safe. This means that this routine may be safely used by multiple threads without the need for any user-provided thread locks. However, the routine is not interrupt safe. Typically, this is due to the use of memory allocation routines such as malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

Notes for Fortran

All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in Fortran.

Errors

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. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible.

MPI_SUCCESS

No error; MPI routine completed successfully.

MPI_ERR_WIN

Invalid MPI window object

MPI_ERR_KEYVAL

Invalid keyval

MPI_ERR_OTHER

Other error; use MPI_Error_string to get more information about this error code.

Location:win_get_attr.c