NAME

       MPI_Get_address -  Get the address of a location in memory

SYNOPSIS

       int MPI_Get_address(const void *location, MPI_Aint *address)

INPUT PARAMETERS

       location
              - location in caller memory (choice)

OUTPUT PARAMETERS

       address
              - address of location (integer)

NOTES

       This  routine  is provided for both the Fortran and C programmers.  On many systems, the address returned
       by this routine will be the same as produced by the C & operator, but this is not required in C  and  may
       not  be  true  of  systems  with  word-  rather than byte-oriented instructions or systems with segmented
       address spaces.

THREAD AND INTERRUPT SAFETY

       This routine is thread-safe.  This means that this routine may be safely used by multiple threads without
       the  need  for  any  user-provided thread locks.  However, the routine is not interrupt safe.  Typically,
       this is due to the use of memory allocation routines such as malloc or other non-MPICH  runtime  routines
       that are themselves not interrupt-safe.

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 Fortran.

       In Fortran, the integer type is always signed.  This can cause problems on systems where the address fits
       into a four byte unsigned integer but the value is larger than the largest signed integer.  For  example,
       a  system  with more than 2 GBytes of memory may have addresses that do not fit within a four byte signed
       integer.  Unfortunately, there is no easy solution to this problem, as there is no Fortran datatype  that
       can be used here (using a longer integer type will cause other problems, as well as surprising users when
       the size of the integer type is larger that the size of a pointer in C).  In this case, it is recommended
       that you use C to manipulate addresses.

ERRORS

       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 guarantee that an MPI program can continue past an error; however, MPI
       implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_ARG
              - Invalid argument.  Some argument is invalid and is not identified  by  a  specific  error  class
              (e.g., MPI_ERR_RANK ).
       MPI_ERR_OTHER
              - Other error; use MPI_Error_string to get more information about this error code.

                                                    2/9/2024                                  MPI_Get_address(3)