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154 lines
5.0 KiB
Fortran
154 lines
5.0 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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!
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! File: psi_bld_tmphalo.f90
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!
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! Subroutine: psi_bld_tmphalo
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! Build initial versions of data exchange lists.
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! When the descriptor is for a large index space, we cannot build
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! the data exchange lists "on-the-fly", but we also want to keep using the
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! same format conversion routines we use in the small index space case,
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! hence this adapter routine.
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!
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!
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! Arguments:
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! desc - type(psb_desc_type). The communication descriptor.
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! info - integer. return code.
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!
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subroutine psi_bld_tmphalo(desc,info)
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use psb_desc_mod
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use psb_serial_mod
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use psb_const_mod
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use psb_error_mod
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use psb_penv_mod
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use psb_realloc_mod
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use psi_mod, psb_protect_name => psi_bld_tmphalo
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implicit none
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type(psb_desc_type), intent(inout) :: desc
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integer(psb_ipk_), intent(out) :: info
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integer(psb_lpk_),allocatable :: helem(:)
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integer(psb_ipk_),allocatable :: hproc(:)
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integer(psb_ipk_),allocatable :: tmphl(:)
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integer(psb_ipk_) :: i,j,np,me,lhalo,nhalo,&
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& n_col, err_act, key, ih, nh, idx, nk,icomm
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: n_row
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character(len=20) :: name,ch_err
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info = psb_success_
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name = 'psi_bld_tmphalo'
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call psb_erractionsave(err_act)
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ctxt = desc%get_context()
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icomm = desc%get_mpic()
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n_row = desc%get_local_rows()
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n_col = desc%get_local_cols()
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! check on blacs grid
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call psb_info(ctxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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if (.not.(desc%is_bld())) then
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info = psb_err_invalid_cd_state_
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call psb_errpush(info,name)
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goto 9999
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end if
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! Here we do not know yet who owns what, so we have
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! to call fnd_owner.
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nh = (n_col-n_row)
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Allocate(helem(max(1,nh)),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
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goto 9999
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end if
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do i=1, nh
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helem(i) = n_row+i ! desc%loc_to_glob(n_row+i)
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end do
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call desc%indxmap%l2gip(helem(1:nh),info)
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if (info == psb_success_) call desc%indxmap%fnd_owner(helem(1:nh),hproc,info)
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!write(0,*) 'bld_tmphalo calling set_owner',hproc(:)
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if (info == psb_success_) call desc%indxmap%set_halo_owner(hproc,info)
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if (info == psb_success_) call desc%indxmap%xtnd_p_adjcncy(hproc)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='fnd_owner')
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goto 9999
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endif
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if (nh > size(hproc)) then
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info=psb_err_from_subroutine_
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call psb_errpush(psb_err_from_subroutine_,name,a_err='nh > size(hproc)')
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goto 9999
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end if
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allocate(tmphl((3*((n_col-n_row)+1)+1)),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
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goto 9999
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end if
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j = 1
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do i=1,nh
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tmphl(j+0) = hproc(i)
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if (tmphl(j+0)<0) then
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write(psb_err_unit,*) me,'Unrecoverable error: missing proc from asb',&
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& i, nh, n_row+i,helem(i),hproc(i)
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info = psb_err_invalid_cd_state_
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call psb_errpush(info,name)
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goto 9999
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end if
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tmphl(j+1) = 1
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tmphl(j+2) = n_row+i
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j = j + 3
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end do
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tmphl(j) = -1
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lhalo = j
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nhalo = (lhalo-1)/3
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call psb_move_alloc(tmphl,desc%halo_index,info)
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psi_bld_tmphalo
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