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psblas3/base/tools/psb_zspalloc.f90

126 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: psb_zspalloc.f90
!
! Subroutine: psb_zspalloc
! Allocate sparse matrix structure for psblas routines.
!
! Arguments:
! a - type(psb_zspmat_type). The sparse matrix to be allocated.
! desc_a - type(psb_desc_type). The communication descriptor to be updated.
! info - integer. Return code.
! nnz - integer(optional). The number of nonzeroes in the matrix.
! (local, user estimate)
!
subroutine psb_zspalloc(a, desc_a, info, nnz)
use psb_base_mod, psb_protect_name => psb_zspalloc
implicit none
!....parameters...
type(psb_desc_type), intent(in) :: desc_a
type(psb_zspmat_type), intent(inout) :: a
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: nnz
!locals
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: np, me, err_act
integer(psb_ipk_) :: loc_row,loc_col, nnz_, dectype
integer(psb_lpk_) :: m, n
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name
info=psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
name = 'psb_zspall'
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ctxt = desc_a%get_context()
dectype = desc_a%get_dectype()
call psb_info(ctxt, me, np)
! ....verify blacs grid correctness..
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
loc_row = desc_a%get_local_rows()
loc_col = desc_a%get_local_cols()
m = desc_a%get_global_rows()
n = desc_a%get_global_cols()
!...allocate matrix data...
if (present(nnz))then
if (nnz < 0) then
info=45
call psb_errpush(info,name,i_err=(/7_psb_ipk_,nnz/))
goto 9999
endif
nnz_ = nnz
else
nnz_ = max(1,5*loc_row)
endif
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name), &
& ':allocating size:',loc_row,loc_col,nnz_
call a%free()
!....allocate aspk, ia1, ia2.....
call a%csall(loc_row,loc_col,info,nz=nnz_)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
call psb_errpush(info,name,a_err='sp_all')
goto 9999
end if
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': ', &
& desc_a%get_dectype(),psb_desc_bld_
return
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psb_zspalloc