mpi_get_address(3openmpi) [osx man page]

MPI_Get_address(3OpenMPI)												 MPI_Get_address(3OpenMPI)

NAME

       MPI_Get_address - Gets the address of a location in memory.

SYNTAX

C Syntax
       #include <mpi.h>
       int MPI_Get_address(void *location, MPI_Aint *address)

Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_GET_ADDRESS(LOCATION, ADDRESS, IERROR)
	    <type> LOCATION(*)
	    INTEGER   ADDRESS, IERROR

C++ Syntax
       #include <mpi.h>
       MPI::Aint MPI::Get_address(void* location)

INPUT PARAMETERS

       location  Location in caller memory (choice).

OUTPUT PARAMETERS

       address	 Address of location (integer).

       IERROR	 Fortran only: Error status (integer).

DESCRIPTION

       MPI_Get_address returns the byte address of a location in memory.

       Example: Using MPI_Get_address for an array.

       EAL A(100,100)
	  INTEGER I1, I2, DIFF
	  CALL MPI_GET_ADDRESS(A(1,1), I1, IERROR)
	  CALL MPI_GET_ADDRESS(A(10,10), I2, IERROR)
	  DIFF = I2 - I1
       ! The value of DIFF is 909*sizeofreal; the values of I1 and I2 are
       ! implementation dependent.

NOTES

       Current	Fortran  MPI  codes  will run unmodified and will port to any system. However, they may fail if addresses larger than 2^32 - 1 are
       used in the program. New codes should be written so that they use the new functions. This provides  compatibility  with	C/C++  and  avoids
       errors  on  64-bit  architectures. However, such newly written codes may need to be (slightly) rewritten to port to old Fortran 77 environ-
       ments that do not support KIND declarations.

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++ func-
       tions  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.

Open MPI 1.2							  September 2006					 MPI_Get_address(3OpenMPI)

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MPI_Type_get_extent(3OpenMPI)											     MPI_Type_get_extent(3OpenMPI)

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 syntax

	    INTEGER*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++ func-
       tions  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.

Open MPI 1.2							  September 2006				     MPI_Type_get_extent(3OpenMPI)

Linux and UNIX Man Pages

mpi_get_address(3openmpi) [osx man page]

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