spmd_exch_nodarea.F

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!||====================================================================
!||    spmd_exch_nodarea            ../engine/source/mpi/anim/spmd_exch_nodarea.F
!||--- called by ------------------------------------------------------
!||    admthke                      ../engine/source/model/remesh/admthke.F
!||    ani_pcont                    ../engine/source/output/anim/generate/ani_pcont.F
!||    ani_pcont21                  ../engine/source/output/anim/generate/ani_pcont.F
!||    err_thk                      ../engine/source/elements/shell/err_thk.F
!||    genani                       ../engine/source/output/anim/generate/genani.F
!||    inter_nodal_areas            ../engine/source/output/inter_nodal_areas.F
!||    inter_sh_offset_ini          ../engine/source/interfaces/shell_offset/inter_offset_ini.F90
!||    spmd_exch_output_noda_pext   ../engine/source/mpi/output/spmd_exch_output_noda_pext.F
!||--- calls      -----------------------------------------------------
!||--- uses       -----------------------------------------------------
!||    spmd_comm_world_mod          ../engine/source/mpi/spmd_comm_world.F90
!||====================================================================
      SUBROUTINE spmd_exch_nodarea(
     .           NODAREA,IAD_ELEM,FR_ELEM,LENR,WEIGHT)
C performs the summation of areas at boundary nodes
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
        USE spmd_comm_world_mod, ONLY : spmd_comm_world
#include      "implicit_f.inc"
C-----------------------------------------------------------------
C   M e s s a g e   P a s s i n g
C-----------------------------------------------
#include "spmd.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com01_c.inc"
#include      "task_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER  IAD_ELEM(2,*),FR_ELEM(*), LENR,WEIGHT(*)
      my_real 
     .        nodarea(*)
C-----------------------------------------------
C   L o c a l  V a r i a b l e s
C-----------------------------------------------
#ifdef MPI
      INTEGER MSGTYP,I,NOD,LOC_PROC,IERROR,
     .        siz,j,l,nb_nod,
     .        status(mpi_status_size),
     .        iad_send(nspmd+1),iad_recv(nspmd+1),
     .        req_r(nspmd),req_s(nspmd),msgoff
 
      my_real,
     .  DIMENSION(:),ALLOCATABLE ::  sbuf,rbuf
      DATA msgoff/7035/
C-----------------------------------------------
C   S o u r c e  L i n e s
C-----------------------------------------------
      ALLOCATE(sbuf(lenr))
      ALLOCATE(rbuf(lenr))
C-----------------------------------------------
 
      loc_proc = ispmd+1
      l = 1
      iad_recv(1)=1
 
C   setting up reception buffers
      DO i=1,nspmd
         siz = iad_elem(1,i+1)-iad_elem(1,i)
         IF(siz/=0) THEN
           msgtyp = msgoff
           CALL mpi_irecv(
     s      rbuf(l),siz,real,it_spmd(i),msgtyp,
     g      spmd_comm_world,req_r(i),ierror)
           l = l+siz
         END IF
         iad_recv(i+1) = l
      END DO
 
C   filling send buffers and sending data
C
      l=1
      iad_send(1)=1
      DO i=1,nspmd
         DO j=iad_elem(1,i),iad_elem(1,i+1)-1
            nod = fr_elem(j)
            sbuf(l) = nodarea(nod)
            l = l+1
         END DO
        iad_send(i+1) = l
      END DO
 
      DO i=1,nspmd
 
       IF(iad_elem(1,i+1)-iad_elem(1,i)>0)THEN
 
          
          msgtyp = msgoff
          siz = iad_send(i+1)-iad_send(i)
          l = iad_send(i)
 
          CALL mpi_isend(
     s      sbuf(l),siz,real,it_spmd(i),msgtyp,
     g      spmd_comm_world,req_s(i),ierror)
       ENDIF                
      END DO
C   reception and processing
      DO i = 1, nspmd
C
        nb_nod = iad_elem(1,i+1)-iad_elem(1,i)
        IF(nb_nod>0)THEN
          CALL mpi_wait(req_r(i),status,ierror)
          l = iad_recv(i)
 
          DO j=iad_elem(1,i),iad_elem(1,i+1)-1
 
             nod = fr_elem(j)
             nodarea(nod) = nodarea(nod) + rbuf(l)
             l = l+1
          ENDDO
        ENDIF
      ENDDO
 
      DO i = 1, nspmd
        IF(iad_elem(1,i+1)-iad_elem(1,i)>0)THEN
          CALL mpi_wait(req_s(i),status,ierror)
        ENDIF
      ENDDO
C
C resetting adm on non-main node
C
C      DO I = 1, NUMNOD
C        IF(WEIGHT(I)==0) ADM(I) = ZERO
C      ENDDO
C
      DEALLOCATE(sbuf)
      DEALLOCATE(rbuf)
 
#endif
      RETURN
      END