MPIGetaddress(3OpenMPI) MPIGetaddress(3OpenMPI)

NAME
       MMPPIIGGeettaaddddrreessss - Gets the address of a location in memory.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIGetaddress(void *location, MPIAint *address)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPIGETADDRESS(LOCATION, ADDRESS, IERROR)
             LOCATION(*)
            INTEGER   ADDRESS, IERROR


CC++++ SSyynnttaaxx
       #include 
       MPI::Aint MPI::Getaddress(void* location)


IINNPPUUTT PPAARRAAMMEETTEERRSS
       location  Location in caller memory (choice).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       address   Address of location (integer).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIGetaddress returns the byte address of a location in memory.

       Example: Using MPIGetaddress for an array.

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


NNOOTTEESS
       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.


EERRRROORRSS
       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::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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       MPIGetaddress(3OpenMPI)