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psblas3/base/tools/psb_cspalloc.f90

134 lines
4.5 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 2.2
!!$ (C) Copyright 2006/2007/2008
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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_cspalloc.f90
!
! Subroutine: psb_cspalloc
! Allocate sparse matrix structure for psblas routines.
!
! Arguments:
! a - type(psb_c_sparse_mat). 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_cspalloc(a, desc_a, info, nnz)
use psb_sparse_mod, psb_protect_name => psb_cspalloc
implicit none
!....parameters...
type(psb_desc_type), intent(in) :: desc_a
type(psb_c_sparse_mat), intent(inout) :: a
integer, intent(out) :: info
integer, optional, intent(in) :: nnz
!locals
integer :: ictxt, dectype
integer :: np,me,loc_row,loc_col,&
& length_ia1,length_ia2, err_act,m,n
integer :: int_err(5)
integer :: debug_level, debug_unit
character(len=20) :: name, ch_err
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
name = 'psb_cspall'
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = psb_cd_get_context(desc_a)
dectype = psb_cd_get_dectype(desc_a)
call psb_info(ictxt, me, np)
! ....verify blacs grid correctness..
if (np == -1) then
info = psb_err_blacs_error_
call psb_errpush(info,name)
goto 9999
endif
loc_row = psb_cd_get_local_rows(desc_a)
loc_col = psb_cd_get_local_cols(desc_a)
m = psb_cd_get_global_rows(desc_a)
n = psb_cd_get_global_cols(desc_a)
!...allocate matrix data...
if (present(nnz))then
if (nnz < 0) then
info=45
int_err(1)=7
int_err(2)=nnz
call psb_errpush(info,name,int_err)
goto 9999
endif
length_ia1=nnz
length_ia2=nnz
else
length_ia1=max(1,5*loc_row)
endif
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),':allocating size:',length_ia1
!....allocate aspk, ia1, ia2.....
call a%free()
call a%csall(loc_row,loc_col,info,nz=length_ia1)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='sp_all'
call psb_errpush(info,name,int_err)
goto 9999
end if
if (debug_level >= psb_debug_ext_) &
& write(debug_unit,*) me,' ',trim(name),': ', &
& psb_cd_get_dectype(desc_a),psb_desc_bld_
return
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_ret_) then
return
else
call psb_error(ictxt)
end if
return
end subroutine psb_cspalloc