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