SUBROUTINE local_tremain( remaining_time )

!--------------------------------------------------------------------------------!
! This file is part of PALM.
!
! PALM is free software: you can redistribute it and/or modify it under the terms
! of the GNU General Public License as published by the Free Software Foundation,
! either version 3 of the License, or (at your option) any later version.
!
! PALM 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 GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License along with
! PALM. If not, see <http://www.gnu.org/licenses/>.
!
! Copyright 1997-2012  Leibniz University Hannover
!--------------------------------------------------------------------------------!
!
! Current revisions:
! -----------------
! 
!
! Former revisions:
! -----------------
! $Id: local_tremain.f90 1037 2012-10-22 14:10:22Z witha $
!
! 1036 2012-10-22 13:43:42Z raasch
! code put under GPL (PALM 3.9)
!
! 225 2009-01-26 14:44:20Z raasch
! Type of count and count_rate changed to INTEGER(8) in order to avoid out of
! range problems (which result in measured negative time intervals)
!
! 82 2007-04-16 15:40:52Z raasch
! Preprocessor strings for different linux clusters changed to "lc",
! preprocessor directives for old systems removed
!
! RCS Log replace by Id keyword, revision history cleaned up
!
! Revision 1.14  2006/06/02 15:20:33  raasch
! Extended to TIT Sun Fire X4600 System (lctit)
!
! Revision 1.1  1998/03/18 20:14:47  raasch
! Initial revision
!
!
! Description:
! ------------
! For different operating systems get the remaining cpu-time of the job
!------------------------------------------------------------------------------!

    USE control_parameters
    USE cpulog
    USE pegrid

    IMPLICIT NONE

    REAL ::  remaining_time
#if defined( __ibm )
    INTEGER(8) ::  IRTC
    REAL       ::  actual_wallclock_time
#elif defined( __lc )
    INTEGER(8) ::  count, count_rate
    REAL       ::  actual_wallclock_time
#endif

#if defined( __ibm )

    actual_wallclock_time = IRTC( ) * 1E-9
    remaining_time = maximum_cpu_time_allowed - &
                     ( actual_wallclock_time - initial_wallclock_time )

#elif defined( __lc )

    CALL SYSTEM_CLOCK( count, count_rate )
    actual_wallclock_time = REAL( count ) / REAL( count_rate )
    remaining_time = maximum_cpu_time_allowed - &
                     ( actual_wallclock_time - initial_wallclock_time )

#elif defined( __nec )
    
    CALL TREMAIN( remaining_time )
    remaining_time = remaining_time / tasks_per_node

#else

!
!-- No stop due to running out of cpu-time on other machines
    remaining_time = 9999999.9

#endif

 END SUBROUTINE local_tremain