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139 lines
4.4 KiB
Fortran
139 lines
4.4 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS v2.0
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!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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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_dspalloc.f90
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!
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! Subroutine: psb_dspalloc
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! Allocate sparse matrix structure for psblas routines.
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!
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! Parameters:
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! a - type(<psb_dspmat_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. Possibly returns an error code.
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! nnz - integer(optional). The number of nonzeroes in the matrix.
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!
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subroutine psb_dspalloc(a, desc_a, info, nnz)
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use psb_descriptor_type
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use psb_spmat_type
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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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implicit none
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!....parameters...
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type(psb_desc_type), intent(inout) :: desc_a
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type(psb_dspmat_type), intent(out) :: a
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integer, intent(out) :: info
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integer, optional, intent(in) :: nnz
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!locals
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integer :: ictxt, dectype
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integer :: np,me,loc_row,&
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& length_ia1,length_ia2, err_act,m,n
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integer :: int_err(5)
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logical, parameter :: debug=.false.
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character(len=20) :: name, ch_err
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if(psb_get_errstatus() /= 0) return
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info=0
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call psb_erractionsave(err_act)
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name = 'psb_dspalloc'
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ictxt = psb_cd_get_context(desc_a)
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dectype = psb_cd_get_dectype(desc_a)
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call psb_info(ictxt, me, np)
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! ....verify blacs grid correctness..
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if (np == -1) then
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info = 2010
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call psb_errpush(info,name)
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goto 9999
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endif
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!
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! hmm, not a good idea, not all compilers can rely on any given
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! value for non initialized pointers. let's avoid this,
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! and just rely on documentation.
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! check if psdalloc is already called for this matrix
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! set fields in desc_a%matrix_data....
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loc_row = psb_cd_get_local_rows(desc_a)
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m = psb_cd_get_global_rows(desc_a)
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n = psb_cd_get_global_cols(desc_a)
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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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int_err(1)=7
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int_err(2)=nnz
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call psb_errpush(info,name,int_err)
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goto 9999
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endif
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length_ia1=nnz
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length_ia2=nnz
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else
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length_ia1=max(1,4*loc_row)
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length_ia2=max(1,4*loc_row)
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endif
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if (debug) write(*,*) 'allocating size:',length_ia1
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!....allocate aspk, ia1, ia2.....
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call psb_sp_all(loc_row,loc_row,a,length_ia1,info)
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if(info /= 0) then
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info=4010
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ch_err='sp_all'
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call psb_errpush(info,name,int_err)
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goto 9999
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end if
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if (debug) write(0,*) 'spall: ', &
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& psb_cd_get_dectype(desc_a),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 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_ret_) then
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return
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else
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call psb_error(ictxt)
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end if
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return
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end subroutine psb_dspalloc
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