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psblas3/base/internals/psi_bld_tmphalo.f90

156 lines
5.0 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ Redistribution and use in source and binary forms, with or without
!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 2. Redistributions in binary form must reproduce the above copyright
!!$ notice, this list of conditions, and the following disclaimer in the
!!$ documentation and/or other materials provided with the distribution.
!!$ 3. The name of the PSBLAS group or the names of its contributors may
!!$ not be used to endorse or promote products derived from this
!!$ software without specific written permission.
!!$
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
!
! File: psi_bld_tmphalo.f90
!
! Subroutine: psi_bld_tmphalo
! Build initial versions of data exchange lists.
! When the descriptor is for a large index space, we cannot build
! the data exchange lists "on-the-fly", but we also want to keep using the
! same format conversion routines we use in the small index space case,
! hence this adapter routine.
!
!
! Arguments:
! desc - type(psb_desc_type). The communication descriptor.
! info - integer. return code.
!
subroutine psi_bld_tmphalo(desc,info)
use psb_descriptor_type
use psb_serial_mod
use psb_const_mod
use psb_error_mod
use psb_penv_mod
use psb_realloc_mod
use psi_mod, psb_protect_name => psi_bld_tmphalo
implicit none
type(psb_desc_type), intent(inout) :: desc
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_),allocatable :: helem(:),hproc(:)
integer(psb_ipk_),allocatable :: tmphl(:)
integer(psb_ipk_) :: i,j,np,me,lhalo,nhalo,&
& n_col, err_act, key, ih, nh, idx, nk,icomm
integer(psb_ipk_) :: ictxt,n_row
character(len=20) :: name,ch_err
info = psb_success_
name = 'psi_bld_tmphalo'
call psb_erractionsave(err_act)
ictxt = desc%get_context()
icomm = desc%get_mpic()
n_row = desc%get_local_rows()
n_col = desc%get_local_cols()
! check on blacs grid
call psb_info(ictxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (.not.(psb_is_bld_desc(desc).and.allocated(desc%indxmap))) then
info = psb_err_invalid_cd_state_
call psb_errpush(info,name)
goto 9999
end if
! Here we do not know yet who owns what, so we have
! to call fnd_owner.
nh = (n_col-n_row)
Allocate(helem(max(1,nh)),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
goto 9999
end if
do i=1, nh
helem(i) = n_row+i ! desc%loc_to_glob(n_row+i)
end do
call desc%indxmap%l2g(helem(1:nh),info)
call desc%indxmap%fnd_owner(helem(1:nh),hproc,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='fnd_owner')
goto 9999
endif
if (nh > size(hproc)) then
info=psb_err_from_subroutine_
call psb_errpush(psb_err_from_subroutine_,name,a_err='nh > size(hproc)')
goto 9999
end if
allocate(tmphl((3*((n_col-n_row)+1)+1)),stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
goto 9999
end if
j = 1
do i=1,nh
tmphl(j+0) = hproc(i)
if (tmphl(j+0)<0) then
write(psb_err_unit,*) me,'Unrecoverable error: missing proc from asb',&
& i, nh, n_row+i,helem(i),hproc(i)
info = psb_err_invalid_cd_state_
call psb_errpush(info,name)
goto 9999
end if
tmphl(j+1) = 1
tmphl(j+2) = n_row+i
j = j + 3
end do
tmphl(j) = -1
lhalo = j
nhalo = (lhalo-1)/3
call psb_move_alloc(tmphl,desc%halo_index,info)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_ret_) then
return
else
call psb_error(ictxt)
end if
return
end subroutine psi_bld_tmphalo