node_checksum.F

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!||====================================================================
!||    checksum_mod             ../engine/source/mpi/output/node_checksum.F
!||--- called by ------------------------------------------------------
!||    spmd_collect_multi_fvm   ../engine/source/mpi/output/spmd_collect_multi_fvm.F
!||    spmd_flush_accel         ../engine/source/mpi/output/spmd_flush_accel.F
!||--- uses       -----------------------------------------------------
!||====================================================================
      MODULE checksum_mod
        INTEGER, PARAMETER :: root = 65521
        INTEGER, PARAMETER :: TWO_POWER_16 = 65536
 
        interface
        subroutine adler32(data, len, checksum) bind(C, name="cpp_adler32")
          use iso_c_binding
          type(c_ptr), value :: data
          integer(c_size_t), value :: len
          integer(c_int) :: checksum
        end subroutine adler32
        end interface
      CONTAINS
!! \brief Returns Adler32 checksum of A(1:SIZ2,1:SIZ1)
!||====================================================================
!||    double_array_checksum    ../engine/source/mpi/output/node_checksum.F
!||--- called by ------------------------------------------------------
!||    spmd_collect_multi_fvm   ../engine/source/mpi/output/spmd_collect_multi_fvm.F
!||    spmd_flush_accel         ../engine/source/mpi/output/spmd_flush_accel.F
!||--- calls      -----------------------------------------------------
!||--- uses       -----------------------------------------------------
!||====================================================================
        FUNCTION  double_array_checksum(A,SIZ1,SIZ2) RESULT(CHECKSUM)
           USE iso_c_binding
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
          IMPLICIT NONE
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
          INTEGER, INTENT(IN) :: siz1,siz2 !< sizes
          DOUBLE PRECISION, TARGET, INTENT(IN) :: a(siz2,siz1) !< 2D array of real values
          INTEGER :: checksum !< return value, Adler 32 checksum of A
C-----------------------------------------------
C   L o c a l  V a r i a b l e s
C-----------------------------------------------
          integer(c_size_t) :: len
C-----------------------------------------------
          len = siz2*siz1
          len = len * sizeof(a(1,1))
          call adler32(c_loc(a), len, checksum)
        END
      END MODULE checksum_mod