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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 sys-
tem. 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 environments that do not
support KIND declarations.
ERRORS
Almost all MPI routines return an error value; C routines as the value
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.
1.3.4 Nov 11, 2009 MPI_Get_address(3)
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