MPI_Get_address(3) | Open MPI | MPI_Get_address(3) |
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.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
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 environments 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++ 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.February 10, 2012 | 1.4.5 |