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subroutine psb_dsp_allgather(globa, loca, desc_a, info, root, dupl,keepnum,keeploc)
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use psb_descriptor_type
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use psb_error_mod
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use psb_mat_mod
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use psb_penv_mod
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#ifdef MPI_MOD
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use mpi
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#endif
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implicit none
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#ifdef MPI_H
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include 'mpif.h'
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#endif
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type(psb_dspmat_type), intent(inout) :: loca
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type(psb_dspmat_type), intent(inout) :: globa
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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integer, intent(in), optional :: root, dupl
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logical, intent(in), optional :: keepnum,keeploc
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type(psb_d_coo_sparse_mat) :: loc_coo, glob_coo
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integer :: ictxt,np,me, err_act, icomm, dupl_, nrg, ncg, nzg
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integer :: ip, ndx,naggrm1,naggrp1, i, j, k
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logical :: keepnum_, keeploc_
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integer, allocatable :: nzbr(:), idisp(:)
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character(len=20) :: name
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integer :: debug_level, debug_unit
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name='psb_gather'
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if (psb_get_errstatus().ne.0) return
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info=psb_success_
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call psb_erractionsave(err_act)
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ictxt = psb_cd_get_context(desc_a)
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icomm = psb_cd_get_mpic(desc_a)
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call psb_info(ictxt, me, np)
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if (present(keepnum)) then
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keepnum_ = keepnum
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else
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keepnum_ = .true.
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end if
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if (present(keeploc)) then
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keeploc_ = keeploc
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else
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keeploc_ = .true.
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end if
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call globa%free()
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if (keepnum_) then
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nrg = psb_cd_get_global_rows(desc_a)
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ncg = psb_cd_get_global_rows(desc_a)
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allocate(nzbr(np), idisp(np),stat=info)
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if (info /= psb_success_) then
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info=psb_err_alloc_request_
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call psb_errpush(info,name,i_err=(/2*np,0,0,0,0/),&
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& a_err='integer')
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goto 9999
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end if
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call loca%mv_to(loc_coo)
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nzbr(:) = 0
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nzbr(me+1) = loc_coo%get_nzeros()
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call psb_sum(ictxt,nzbr(1:np))
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nzg = sum(nzbr)
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if (info == psb_success_) call glob_coo%allocate(nrg,ncg,nzg)
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if (info /= psb_success_) goto 9999
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do ip=1,np
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idisp(ip) = sum(nzbr(1:ip-1))
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enddo
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ndx = nzbr(me+1)
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call mpi_allgatherv(loc_coo%val,ndx,mpi_double_precision,&
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& glob_coo%val,nzbr,idisp,&
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& mpi_double_precision,icomm,info)
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if (info == psb_success_) call mpi_allgatherv(loc_coo%ia,ndx,mpi_integer,&
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& glob_coo%ia,nzbr,idisp,&
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& mpi_integer,icomm,info)
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if (info == psb_success_) call mpi_allgatherv(loc_coo%ja,ndx,mpi_integer,&
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& glob_coo%ja,nzbr,idisp,&
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& mpi_integer,icomm,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err=' from mpi_allgatherv')
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goto 9999
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end if
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if (keeploc_) then
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call loca%mv_from(loc_coo)
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else
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call loc_coo%free()
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end if
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call glob_coo%set_nzeros(nzg)
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if (present(dupl)) call glob_coo%set_dupl(dupl)
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call globa%mv_from(glob_coo)
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else
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write(psb_err_unit,*) 'SP_ALLGATHER: Not implemented yet with keepnum ',keepnum_
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_errpush(info,name)
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call psb_erractionrestore(err_act)
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if (err_act.eq.psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine psb_dsp_allgather
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