!
! 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.
!
!
! Purpose
! == = ====
!
! Allocate special descriptor for replicated index space.
!
!
!
! INPUT
! == ====
! M :(Global Input) Integer
! Total number of equations
! required.
!
! ctxt : (Global Input)Integer BLACS context for an NPx1 grid
! required.
!
! OUTPUT
! == =======
! desc : TYPEDESC
! desc OUTPUT FIELDS:
!
! MATRIX_DATA : Pointer to integer Array
! contains some
! local and global information about matrix:
!
! NOTATION STORED IN EXPLANATION
! ------------ ---------------------- -------------------------------------
! DEC_TYPE MATRIX_DATA[DEC_TYPE_] Decomposition type, temporarly is
! setted to 1( matrix not yet assembled)
! M MATRIX_DATA[M_] Total number of equations
! N MATRIX_DATA[N_] Total number of variables
! N_ROW MATRIX_DATA[N_ROW_] Number of local equations
! N_COL MATRIX_DATA[N_COL_] Number of local columns (see below)
! CTXT_A MATRIX_DATA[CTXT_] The BLACS context handle,
! indicating
! the global context of the operation
! on the matrix.
! The context itself is global.
!
! GLOB_TO_LOC Array of dimension equal to number of global
! rows/cols (MATRIX_DATA[M_]). On exit,
! for all global indices either:
! 1. The index belongs to the current process; the entry
! is set to the next free local row index.
! 2. The index belongs to process P (0<=P<=NP-1); the entry
! is set to
! -(NP+P+1)
!
! LOC_TO_GLOB An array of dimension equal to number of local cols N_COL
! i.e. all columns of the matrix such that there is at least
! one nonzero entry within the local row range. At the time
! this routine is called N_COL cannot be know, so we set
! N_COL=N_ROW, and dimension this vector on N_ROW plus an
! estimate. On exit the vector elements are set
! to the index of the corresponding entry in GLOB_TO_LOC, or
! to -1 for indices I>N_ROW.
!
!
! HALO_INDEX Not touched here, as it depends on the matrix pattern
!
! OVRLAP_INDEX On exit from this routine, the overlap indices are stored in
! triples (Proc, 1, Index), similar to the assembled format
! but neither optimized, nor deadlock free.
! List is terminated with -1
!
! OVRLAP_ELEM On exit from this routine, just a list of pairs (index,#p).
! List is terminated with -1.
!
!
! END OF desc OUTPUT FIELDS
!
!
subroutine psb_cdrep(m, ctxt, desc, info)
use psb_base_mod
use psi_mod
use psb_repl_map_mod
implicit None
!....Parameters...
integer(psb_lpk_), intent(in) :: m
type(psb_ctxt_type), intent(in) :: ctxt
integer(psb_ipk_), intent(out) :: info
Type(psb_desc_type), intent(out) :: desc
!locals
integer(psb_ipk_) :: i,np,me,err,err_act
integer(psb_lpk_) :: n
integer(psb_lpk_) :: l_err(5),exch(2)
integer(psb_ipk_) :: thalo(1), tovr(1), text(1)
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name
if(psb_get_errstatus() /= 0) return
info=psb_success_
err=0
name = 'psb_cdrep'
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
call psb_info(ctxt, me, np)
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': ',np
n = m
!... check m and n parameters....
if (m < 1) then
info = psb_err_iarg_neg_
l_err(1) = 1
l_err(2) = m
else if (n < 1) then
info = psb_err_iarg_neg_
l_err(1) = 2
l_err(2) = n
endif
if (info /= psb_success_) then
call psb_errpush(info,name,l_err=l_err)
goto 9999
end if
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': doing global checks'
!global check on m and n parameters
if (me == psb_root_) then
exch(1)=m
exch(2)=n
call psb_bcast(ctxt,exch(1:2),root=psb_root_)
else
call psb_bcast(ctxt,exch(1:2),root=psb_root_)
if (exch(1) /= m) then
info=psb_err_parm_differs_among_procs_
l_err(1)=1
else if (exch(2) /= n) then
info=psb_err_parm_differs_among_procs_
l_err(1)=2
endif
endif
if (info /= psb_success_) then
call psb_errpush(info,name,l_err=l_err)
goto 9999
end if
call psb_nullify_desc(desc)
!count local rows number
! allocate work vector
allocate(psb_repl_map :: desc%indxmap, stat=info)
select type(aa => desc%indxmap)
type is (psb_repl_map)
call aa%repl_map_init(ctxt,m,info)
class default
! This cannot happen
info = psb_err_internal_error_
call psb_errpush(info,name)
Goto 9999
end select
tovr = -1
call psi_bld_tmpovrl(tovr,desc,info)
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': end'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psb_cdrep