You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
psblas3/base/internals/psi_fnd_owner.F90

127 lines
4.3 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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_lpk_), intent(in) :: idx(:)
integer(psb_ipk_), allocatable, intent(out) :: iprc(:)
type(psb_desc_type), intent(inout) :: 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
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: 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)
ctxt = 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(ctxt, 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 call psb_error_handler(ctxt,err_act)
return
end subroutine psi_fnd_owner