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MPI_Type_get_extent
Langue: en
Version: Mar 18, 2009 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
MPI_Type_get_extent - Returns the lower bound and extent of a data type.SYNTAX
C Syntax
#include <mpi.h> int MPI_Type_get_extent(MPI_Datatype datatype, MPI_Aint *lb, MPI_Aint *extent)
Fortran Syntax (see FORTRAN 77 NOTES)
INCLUDE 'mpif.h' MPI_TYPE_GET_EXTENT(DATATYPE, LB, EXTENT, IERROR) INTEGER DATATYPE, IERROR INTEGER(KIND=MPI_ADDRESS_KIND) LB, EXTENT
C++ Syntax
#include <mpi.h> void MPI::Datatype::Get_extent(MPI::Aint& lb, MPI::Aint& extent) const
INPUT PARAMETER
- datatype
- Data type (handle).
OUTPUT PARAMETERS
- lb
- Lower bound of data type (integer).
- extent
- Data type extent (integer).
- IERROR
- Fortran only: Error status (integer).
DESCRIPTION
MPI_Type_get_extent returns the lower bound and the extent of datatype.NOTE
Use of MPI_Type_get_extent is strongly recommended over the old MPI-1 functions MPI_Type_extent and MPI_Type_lb.FORTRAN 77 NOTES
The MPI standard prescribes portable Fortran syntax for the LB and EXTENT arguments only for Fortran 90. FORTRAN 77 users may use the non-portable syntaxINTEGER*MPI_ADDRESS_KIND LB or INTEGER*MPI_ADDRESS_KIND EXTENT
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.
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