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126 lines
4.2 KiB
Fortran
126 lines
4.2 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_fnd_owner.f90
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!
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! Subroutine: psi_fnd_owner
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! Figure out who owns global indices.
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!
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! Arguments:
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! nv - integer Number of indices required on the calling
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! process
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! idx(:) - integer Required indices on the calling process.
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! Note: the indices should be unique!
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! iprc(:) - integer(psb_ipk_), allocatable Output: process identifiers for
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! the corresponding
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! indices
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! desc_a - 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_fnd_owner(nv,idx,iprc,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_fnd_owner
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#ifdef MPI_MOD
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use mpi
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#endif
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implicit none
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#ifdef MPI_H
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include 'mpif.h'
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#endif
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integer(psb_ipk_), intent(in) :: nv
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integer(psb_lpk_), intent(in) :: idx(:)
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integer(psb_ipk_), allocatable, intent(out) :: iprc(:)
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type(psb_desc_type), intent(in) :: desc
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_), allocatable :: hsz(:),hidx(:),helem(:),hproc(:),&
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& sdsz(:),sdidx(:), rvsz(:), rvidx(:),answers(:,:),idxsrch(:,:)
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integer(psb_ipk_) :: i,n_row,n_col,err_act,ih,icomm,hsize,ip,isz,k,j,&
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& last_ih, last_j
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integer(psb_ipk_) :: ictxt,np,me
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logical, parameter :: gettime=.false.
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real(psb_dpk_) :: t0, t1, t2, t3, t4, tamx, tidx
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character(len=20) :: name
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info = psb_success_
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name = 'psi_fnd_owner'
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call psb_erractionsave(err_act)
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ictxt = 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(ictxt, 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 (nv < 0 ) 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_ok())) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='invalid desc')
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goto 9999
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end if
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call desc%fnd_owner(idx(1:nv),iprc,info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='desc%fnd_owner')
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goto 9999
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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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end subroutine psi_fnd_owner
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