DragonFly On-Line Manual Pages
MPI_Type_lb(3) MPI MPI_Type_lb(3)
MPI_Type_lb - Returns the lower-bound of a datatype
int MPI_Type_lb(MPI_Datatype datatype, MPI_Aint *displacement)
- datatype (handle)
- displacement of lower bound from origin, in bytes (address
The MPI-2 standard deprecated a number of routines because MPI-2
provides better versions. This routine is one of those that was
deprecated. The routine may continue to be used, but new code should
use the replacement routine. The replacement for this routine is
THREAD AND INTERRUPT SAFETY
This routine is both thread- and interrupt-safe. This means that this
routine may safely be used by multiple threads and from within a signal
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
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.
- No error; MPI routine completed successfully.
- Invalid datatype argument. May be an uncommitted MPI_Datatype
(see MPI_Type_commit ).
- Invalid argument. Some argument is invalid and is not
identified by a specific error class (e.g., MPI_ERR_RANK ).