psblas3/base/tools/psb_ialloc.f90

!!$ 
!!$              Parallel Sparse BLAS  v2.0
!!$    (C) Copyright 2006 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_ialloc.f90
!
! Function: psb_ialloc
!    Allocates dense integer matrix for PSBLAS routines
!    The descriptor may be in either the build or assembled state.
! 
! Arguments: 
!    x      - the matrix to be allocated.
!    desc_a - the communication descriptor.
!    info   - possibly returns an error code
!    n      - optional number of columns.
subroutine psb_ialloc(x, desc_a, info, n)
  !....allocate dense  matrix for psblas routines.....
  use psb_descriptor_type
  use psb_const_mod
  use psb_error_mod
  use psb_penv_mod

  implicit none
  
  !....parameters...
  integer, allocatable, intent(out) :: x(:,:)
  type(psb_desc_type), intent(in)   :: desc_a
  integer, intent(out)              :: info
  integer, optional, intent(in)     :: n


  !locals
  integer             :: np,me,err,n_col,n_row,i,j,err_act
  integer             :: ictxt,n_
  integer             :: int_err(5), exch(3)
  character(len=20)   :: name, ch_err

  if(psb_get_errstatus() /= 0) return 
  info=0
  name='psb_ialloc'
  call psb_erractionsave(err_act)
  
  ictxt=psb_cd_get_context(desc_a)

  call psb_info(ictxt, me, np)
  if (np == -1) then
    info = 2010
    call psb_errpush(info,name)
    goto 9999
  endif

  !... check m and n parameters....
  if (.not.psb_is_ok_desc(desc_a)) then 
    info = 3110
    call psb_errpush(info,name)
    goto 9999
  endif

  if (present(n)) then 
    n_ = n
  else
    n_ = 1
  endif
  !global check on n parameters
  if (me == psb_root_) then
    exch(1)=n_
    call psb_bcast(ictxt,exch(1),root=psb_root_)
  else
    call psb_bcast(ictxt,exch(1),root=psb_root_)
    if (exch(1) /= n_) then
      info=550
      int_err(1)=1
      call psb_errpush(info,name,int_err)
      goto 9999
    endif
  endif

  !....allocate x .....
  if (psb_is_asb_desc(desc_a).or.psb_is_upd_desc(desc_a)) then
    n_col = max(1,psb_cd_get_local_cols(desc_a))
    allocate(x(n_col,n_),stat=info)
    if (info /= 0) then
      info=4025
      int_err(1)=n_col*n_
      call psb_errpush(info,name,int_err,a_err='integer')
      goto 9999
    endif
    do j=1,n_
      do i=1,n_col
        x(i,j) = 0
      end do
    end do
  else if (psb_is_bld_desc(desc_a)) then
    n_row = max(1,psb_cd_get_local_rows(desc_a))
    allocate(x(n_row,n_),stat=info)
    if (info /= 0) then
      info=4025
      int_err(1)=n_row*n_
      call psb_errpush(info,name,int_err,a_err='integer')
      goto 9999
    endif
    do j = 1, n_
      do i=1,n_row
        x(i,j) = 0
      end do
    end do
  endif

  call psb_erractionrestore(err_act)
  return

9999 continue
  call psb_erractionrestore(err_act)
  if (err_act == psb_act_abort_) then
    call psb_error(ictxt)
    return
  end if
  return

end subroutine psb_ialloc



!!$ 
!!$              Parallel Sparse BLAS  v2.0
!!$    (C) Copyright 2006 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.
!!$ 
!!$  
! Function: psb_iallocv
!    Allocates dense matrix for PSBLAS routines
!    The descriptor may be in either the build or assembled state.
! 
! Arguments: 
!    m      - integer.                  The number of rows.
!    x      - integer,dimension(:).     The matrix to be allocated.
!    desc_a - type(<psb_desc_type>).    The communication descriptor.
!    info   - integer.                  Eventually returns an error code
subroutine psb_iallocv(x, desc_a, info,n)
  !....allocate sparse matrix structure for psblas routines.....
  use psb_descriptor_type
  use psb_const_mod
  use psb_realloc_mod
  use psb_error_mod
  use psb_penv_mod

  implicit none

  !....parameters...
  integer, allocatable, intent(out) :: x(:)
  type(psb_desc_type), intent(in)   :: desc_a
  integer, intent(out)              :: info
  integer, optional, intent(in)     :: n

  !locals
  integer             :: np,me,n_col,n_row,err_act
  integer             :: ictxt, n_
  integer             :: int_err(5)
  logical, parameter  :: debug=.false. 
  character(len=20)   :: name, ch_err

  if(psb_get_errstatus() /= 0) return 
  info=0
  name='psb_iallocv'
  call psb_erractionsave(err_act)

  ictxt=psb_cd_get_context(desc_a)

  call psb_info(ictxt, me, np)
  !     ....verify blacs grid correctness..
  if (np == -1) then
    info = 2010
    call psb_errpush(info,name)
    goto 9999
  endif

  !... check m and n parameters....
  if (.not.psb_is_ok_desc(desc_a)) then 
    info = 3110
    call psb_errpush(info,name)
    goto 9999
  endif

  ! As this is a rank-1 array, optional parameter N is actually ignored.

  !....allocate x .....
  if (psb_is_asb_desc(desc_a).or.psb_is_upd_desc(desc_a)) then
    n_col = max(1,psb_cd_get_local_cols(desc_a))
    allocate(x(n_col),stat=info)
    if (info.ne.0) then
      info=4025
      int_err(1)=n_col
      call psb_errpush(info,name,int_err,a_err='integer')
      goto 9999
    endif
  else if (psb_is_bld_desc(desc_a)) then
    n_row = max(1,psb_cd_get_local_rows(desc_a))
    allocate(x(n_row),stat=info)
    if (info.ne.0) then
      info=4025
      int_err(1)=n_row
      call psb_errpush(info,name,int_err,a_err='integer')
      goto 9999
    endif
  endif

  x = 0

  call psb_erractionrestore(err_act)
  return

9999 continue
  call psb_erractionrestore(err_act)
  if (err_act == psb_act_abort_) then
    call psb_error(ictxt)
    return
  end if
  return

end subroutine psb_iallocv