!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
!version 3 or (at your option) any later version that should be found at:
!http://collaboration.cmc.ec.gc.ca/science/rpn.comm/license.html
!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!See the above mentioned License/Disclaimer for more details.
!You should have received a copy of the License/Disclaimer along with this software;
!if not, you can write to: EC-RPN COMM Group, 2121 TransCanada, suite 500, Dorval (Quebec),
!CANADA, H9P 1J3; or send e-mail to service.rpn@ec.gc.ca
!-------------------------------------- LICENCE END --------------------------------------
!
!***************************************************************
! Name  : init_mpi
! Author:  Bin He     *ARMA/MSC
! Date  :  Nov. 2005
! Purpose: conduct RPN_COMM Initialization . 
!
!***************************************************************

 SUBROUTINE init_mpi() 1,1
 USE procs_topo
 IMPLICIT NONE
 INTEGER :: ierr

 INTEGER get_ptopo
 external get_ptopo 
! 1. Initilize MPI . 
 npex=0
 npey=0
 CALL rpn_comm_init(get_ptopo,myid,nprocs,npex,npey)
 END SUBROUTINE init_mpi
 

 SUBROUTINE get_ptopo(pex,pey),1
 IMPLICIT NONE
 INTEGER,INTENT(OUT) :: pex,pey
!
 INTEGER :: ierr
 INTEGER :: npex,npey
 NAMELIST /ptopo/npex,npey
 INTEGER :: unnmlist,fnom  
 CHARACTER(len=10) :: fnptopo

 unnmlist=555
 npex=1
 npey=1
 fnptopo='ptopo_nml'
 ! OPEN(UNIT=nmlist,FILE='./ptopo_nml',STATUS='OLD',ACTION='READ',IOSTAT=ierr)
 ierr=FNOM(unnmlist,fnptopo,'FTN+SEQ',0)
 IF(ierr /= 0) CALL  mpiabort('Can not Open file ptopo_nml! Abort!') 
 READ(unnmlist,NML=ptopo)
 CLOSE(unnmlist)
 pex=npex
 pey=npey

 END SUBROUTINE get_ptopo