MODULE mod_ioserver_namelist

  LOGICAL,SAVE :: using_server
  LOGICAL,SAVE :: using_oasis
  CHARACTER(LEN=100),SAVE :: client_id
  CHARACTER(LEN=100),SAVE :: server_id
  NAMELIST /coupling_param/ using_server,using_oasis,client_id,server_id  

  INTEGER,SAVE :: global_mpi_buffer_size            
  NAMELIST /mpi_param/ global_mpi_buffer_size  

  INTEGER,PARAMETER,PRIVATE :: starting_unit=356
  
CONTAINS

  SUBROUTINE set_default_namelist
  IMPLICIT NONE
  
    using_server=.FALSE.
    using_oasis=.FALSE.
    client_id='unknown'
    server_id='unknown'
    global_mpi_buffer_size=512
    
  END SUBROUTINE set_default_namelist
  
    
  SUBROUTINE read_namelist
  IMPLICIT NONE
    LOGICAL :: opened
    INTEGER :: unit
    INTEGER :: ierr

    CALL set_default_namelist   
    unit=starting_unit
    opened=.TRUE.
    DO WHILE (opened) 
      unit=unit+1
      INQUIRE(unit,OPENED=opened)
    ENDDO
      
    OPEN(UNIT=unit,FILE='xmlio_server.def',STATUS='old',IOSTAT=ierr)
    
    
    IF (ierr==0) THEN
      READ(unit,nml=coupling_param)
      READ(unit,nml=mpi_param)
      global_mpi_buffer_size=global_mpi_buffer_size*1024*128  
      CLOSE(unit)
    ELSE
      PRINT *,'WARNING : mod_ioserver::read_namelist : file xmlio_server.def is absent', &
              ' ---> using default parameter'
    ENDIF 
    
    
    PRINT *,'namelist read --> ',using_server,using_oasis,client_id,server_id
    
  END SUBROUTINE read_namelist


END MODULE mod_ioserver_namelist