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psblas3/base/tools/psb_get_overlap.f90

104 lines
3.6 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: psb_get_overlap.f90
!
! Subroutine: psb_get_overlap
! Extracts a list of overlap indices. If no overlap is present in
! the distribution the output vector is put in the unallocated state,
! otherwise its size is equal to the number of overlap indices on the
! current (calling) process.
!
! Arguments:
! ovrel(:) - integer, allocatable Array containing the output list
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. return code.
!
subroutine psb_get_ovrlap(ovrel,desc,info)
use psb_sparse_mod, psb_protect_name => psb_get_ovrlap
implicit none
integer, allocatable, intent(out) :: ovrel(:)
type(psb_desc_type), intent(in) :: desc
integer, intent(out) :: info
integer :: i,j, err_act
character(len=20) :: name
info = psb_success_
name='psi_get_overlap'
call psb_erractionsave(err_act)
if (.not.psb_is_asb_desc(desc)) then
info = psb_err_invalid_cd_state_
call psb_errpush(info,name)
goto 9999
end if
if (allocated(desc%ovrlap_elem) ) then
i=size(desc%ovrlap_elem,1)
allocate(ovrel(i),stat=info)
if (info /= psb_success_ ) then
info = psb_err_alloc_dealloc_
call psb_errpush(info,name)
goto 9999
end if
do j=1,i
ovrel(j) = desc%ovrlap_elem(j,1)
end do
else
if (allocated(ovrel)) then
deallocate(ovrel,stat=info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='Deallocate')
goto 9999
end if
end if
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_get_ovrlap