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psblas3/base/internals/psi_fnd_owner.F90

132 lines
4.4 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.1
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010, 2012, 2013
!!$ 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_fnd_owner.f90
!
! Subroutine: psi_fnd_owner
! Figure out who owns global indices.
!
! Arguments:
! nv - integer Number of indices required on the calling
! process
! idx(:) - integer Required indices on the calling process.
! Note: the indices should be unique!
! iprc(:) - integer(psb_ipk_), allocatable Output: process identifiers for
! the corresponding
! indices
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. return code.
!
subroutine psi_fnd_owner(nv,idx,iprc,desc,info)
use psb_desc_mod
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_fnd_owner
#ifdef MPI_MOD
use mpi
#endif
implicit none
#ifdef MPI_H
include 'mpif.h'
#endif
integer(psb_ipk_), intent(in) :: nv
integer(psb_ipk_), intent(in) :: idx(:)
integer(psb_ipk_), allocatable, intent(out) :: iprc(:)
type(psb_desc_type), intent(in) :: desc
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), allocatable :: hsz(:),hidx(:),helem(:),hproc(:),&
& sdsz(:),sdidx(:), rvsz(:), rvidx(:),answers(:,:),idxsrch(:,:)
integer(psb_ipk_) :: i,n_row,n_col,err_act,ih,icomm,hsize,ip,isz,k,j,&
& last_ih, last_j
integer(psb_ipk_) :: ictxt,np,me
logical, parameter :: gettime=.false.
real(psb_dpk_) :: t0, t1, t2, t3, t4, tamx, tidx
character(len=20) :: name
info = psb_success_
name = 'psi_fnd_owner'
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 (nv < 0 ) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (.not.(desc%is_ok())) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='invalid desc')
goto 9999
end if
call desc%fnd_owner(idx(1:nv),iprc,info)
if (info /= psb_success_) then
call psb_errpush(psb_err_from_subroutine_,name,a_err='desc%fnd_owner')
goto 9999
end if
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_fnd_owner