psblas3/base/modules/penv/psi_e_p2p_mod.F90

!   
!                Parallel Sparse BLAS  version 3.5
!      (C) Copyright 2006-2018
!        Salvatore Filippone    
!        Alfredo Buttari      
!   
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!    

module psi_e_p2p_mod
  use psi_penv_mod

  interface psb_snd
    module procedure psb_esnds, psb_esndv, psb_esndm
  end interface

  interface psb_rcv
    module procedure psb_ercvs, psb_ercvv, psb_ercvm
  end interface

contains

  subroutine psb_esnds(ctxt,dat,dst)
#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(in)  :: dat
    integer(psb_mpk_), intent(in)  :: dst
    integer(psb_epk_), allocatable :: dat_(:)
    integer(psb_mpk_) :: info 
#if defined(SERIAL_MPI) 
    ! do nothing
#else
    allocate(dat_(1), stat=info)
    dat_(1) = dat
    call psi_snd(ctxt,psb_int8_tag,dst,dat_,psb_mesg_queue)
#endif    
  end subroutine psb_esnds

  subroutine psb_esndv(ctxt,dat,dst)

#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(in)  :: dat(:)
    integer(psb_mpk_), intent(in)  :: dst
    integer(psb_epk_), allocatable :: dat_(:)
    integer(psb_mpk_) :: info

#if defined(SERIAL_MPI) 
#else
    allocate(dat_(size(dat)), stat=info)
    dat_(:) = dat(:)
    call psi_snd(ctxt,psb_int8_tag,dst,dat_,psb_mesg_queue)
#endif    

  end subroutine psb_esndv

  subroutine psb_esndm(ctxt,dat,dst,m)

#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(in)  :: dat(:,:)
    integer(psb_mpk_), intent(in)  :: dst
    integer(psb_ipk_), intent(in), optional :: m
    integer(psb_epk_), allocatable :: dat_(:)
    integer(psb_ipk_) :: i,j,k,m_,n_
    integer(psb_mpk_) :: info

#if defined(SERIAL_MPI) 
#else
    if (present(m)) then 
      m_ = m
    else
      m_ = size(dat,1)
    end if
    n_ = size(dat,2)
    allocate(dat_(m_*n_), stat=info)
    k=1
    do j=1,n_
      do i=1, m_
        dat_(k) = dat(i,j)
        k = k + 1
      end do
    end do
    call psi_snd(ctxt,psb_int8_tag,dst,dat_,psb_mesg_queue)
#endif    
  end subroutine psb_esndm

  subroutine psb_ercvs(ctxt,dat,src)
#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(out)  :: dat
    integer(psb_mpk_), intent(in)  :: src
    integer(psb_mpk_) :: info, icomm
    integer(psb_mpk_) :: status(mpi_status_size)
#if defined(SERIAL_MPI) 
    ! do nothing
#else
    icomm = psb_get_mpi_comm(ctxt)
    call mpi_recv(dat,1,psb_mpi_epk_,src,psb_int8_tag,icomm,status,info)
    call psb_test_nodes(psb_mesg_queue)
#endif    
  end subroutine psb_ercvs

  subroutine psb_ercvv(ctxt,dat,src)

#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(out)  :: dat(:)
    integer(psb_mpk_), intent(in)  :: src
    integer(psb_epk_), allocatable :: dat_(:)
    integer(psb_mpk_) :: info, icomm
    integer(psb_mpk_) :: status(mpi_status_size)
#if defined(SERIAL_MPI) 
#else
    icomm = psb_get_mpi_comm(ctxt)
    call mpi_recv(dat,size(dat),psb_mpi_epk_,src,psb_int8_tag,icomm,status,info)
    call psb_test_nodes(psb_mesg_queue)
#endif    

  end subroutine psb_ercvv

  subroutine psb_ercvm(ctxt,dat,src,m)

#ifdef MPI_MOD
    use mpi
#endif
    implicit none 
#ifdef MPI_H
    include 'mpif.h'
#endif
    type(psb_ctxt_type), intent(in)  :: ctxt
    integer(psb_epk_), intent(out)  :: dat(:,:)
    integer(psb_mpk_), intent(in)  :: src
    integer(psb_ipk_), intent(in), optional :: m
    integer(psb_epk_), allocatable :: dat_(:)
    integer(psb_mpk_) :: info ,m_,n_, ld, mp_rcv_type
    integer(psb_mpk_) :: i,j,k
    integer(psb_mpk_) :: status(mpi_status_size), icomm
#if defined(SERIAL_MPI) 
    ! What should we do here?? 
#else
    if (present(m)) then 
      m_ = m
      ld = size(dat,1)
      n_ = size(dat,2)
      call mpi_type_vector(n_,m_,ld,psb_mpi_epk_,mp_rcv_type,info)
      if (info == mpi_success) call mpi_type_commit(mp_rcv_type,info)
      icomm = psb_get_mpi_comm(ctxt)
      if (info == mpi_success) call mpi_recv(dat,1,mp_rcv_type,src,&
           & psb_int8_tag,icomm,status,info)
      if (info == mpi_success) call mpi_type_free(mp_rcv_type,info)
    else
      icomm = psb_get_mpi_comm(ctxt) 
      call mpi_recv(dat,size(dat),psb_mpi_epk_,src,psb_int8_tag,icomm,status,info)
    end if
    if (info /= mpi_success) then 
      write(psb_err_unit,*) 'Error in psb_recv', info
    end if
    call psb_test_nodes(psb_mesg_queue)
#endif    
  end subroutine psb_ercvm

end module psi_e_p2p_mod