source: palm/trunk/UTIL/inifor/src/inifor_control.f90 @ 3725

!> @file src/inifor_control.f90
!------------------------------------------------------------------------------!
! This file is part of the PALM model system.
!
! 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 2017-2018 Leibniz Universitaet Hannover
! Copyright 2017-2018 Deutscher Wetterdienst Offenbach
!------------------------------------------------------------------------------!
!
! Current revisions:
! -----------------
! 
! 
! Former revisions:
! -----------------
! $Id: inifor_control.f90 3680 2019-01-18 14:54:12Z raasch $
! Added message buffer for displaying tips to rectify encountered errors
! 
! 
! 3618 2018-12-10 13:25:22Z eckhard
! Prefixed all INIFOR modules with inifor_
! 
! 
! 3614 2018-12-10 07:05:46Z raasch
! abort renamed inifor_abort to avoid intrinsic problem in Fortran
! 
! 3557 2018-11-22 16:01:22Z eckhard
! Updated documentation
! 
! 
! 3447 2018-10-29 15:52:54Z eckhard
! Renamed source files for compatibilty with PALM build system
!
! 
! 3395 2018-10-22 17:32:49Z eckhard
! Suppress debugging messages unless --debug option is given
! 
!
! 3183 2018-07-27 14:25:55Z suehring
! Added version and copyright output
! 
! 
! 3182 2018-07-27 13:36:03Z suehring
! Initial revision
!
! 
!
! Authors:
! --------
!> @author Eckhard Kadasch (Deutscher Wetterdienst, Offenbach)
!
! Description:
! ------------
!> The control module provides routines for timing INIFOR and writing runtime
!> feedback to the terminal and a log file.
!------------------------------------------------------------------------------!
#if defined ( __netcdf )
 MODULE inifor_control

    USE inifor_defs,                                                           &
        ONLY:  LNAME, dp, VERSION, COPYRIGHT

    USE inifor_util,                                                           &
        ONLY:  real_to_str, real_to_str_f

    IMPLICIT NONE

    CHARACTER (LEN=5000) ::  message = '' !< log message buffer
    CHARACTER (LEN=5000) ::  tip     = '' !< optional log message buffer for tips on how to rectify encountered errors

 CONTAINS

!------------------------------------------------------------------------------!
! Description:
! ------------
!> 
!> report() is INIFOR's general logging routine. It prints the given 'message'
!> to the terminal and writes it to the INIFOR log file.
!> 
!> You can use this routine to log events across INIFOR's code to log. For
!> warnings and abort messages, you may use the dedicated routines warn() and
!> inifor_abort() in this module. Both use report() and add specific behaviour
!> to it.
!------------------------------------------------------------------------------!
    SUBROUTINE report(routine, message, debug)

       CHARACTER(LEN=*), INTENT(IN)  ::  routine !< name of calling subroutine of function
       CHARACTER(LEN=*), INTENT(IN)  ::  message !< log message
       LOGICAL, OPTIONAL, INTENT(IN) ::  debug   !< flag the current message as debugging message

       INTEGER                       ::  u                     !< Fortran file unit for the log file
       LOGICAL, SAVE                 ::  is_first_run = .TRUE. !< control flag for file opening mode
       LOGICAL                       ::  suppress_message      !< control falg for additional debugging log


       IF ( is_first_run )  THEN
          OPEN( NEWUNIT=u, FILE='inifor.log', STATUS='replace' )
          is_first_run = .FALSE.
       ELSE
          OPEN( NEWUNIT=u, FILE='inifor.log', POSITION='append', STATUS='old' )
       END IF
          

       suppress_message = .FALSE.
       IF ( PRESENT(debug) )  THEN
          IF ( .NOT. debug )  suppress_message = .TRUE.
       END IF

       IF ( .NOT. suppress_message )  THEN
          PRINT *, "inifor: " // TRIM(message) // "  [ " // TRIM(routine) // " ]"
          WRITE(u, *)  TRIM(message) // "  [ " // TRIM(routine) // " ]"
       END IF

       CLOSE(u)

    END SUBROUTINE report


!------------------------------------------------------------------------------!
! Description:
! ------------
!> 
!> warn() prepends "WARNING:" the given 'message' and prints the result to the
!> terminal and writes it to the INIFOR logfile.
!> 
!> You can use this routine for messaging issues, that still allow INIFOR to
!> continue.
!------------------------------------------------------------------------------!
    SUBROUTINE warn(routine, message)

       CHARACTER(LEN=*), INTENT(IN) ::  routine !< name of calling subroutine or function
       CHARACTER(LEN=*), INTENT(IN) ::  message !< log message

       CALL report(routine, "WARNING: " // TRIM(message))

    END SUBROUTINE warn


!------------------------------------------------------------------------------!
! Description:
! ------------
!> 
!> inifor_abort() prepends "ERROR:" the given 'message' and prints the result to
!> stdout, writes it to the INIFOR logfile, and exits INIFOR.
!> 
!> You can use this routine for messaging issues, that are critical and prevent
!> INIFOR from continueing.
!------------------------------------------------------------------------------!
    SUBROUTINE inifor_abort(routine, message)

       CHARACTER(LEN=*), INTENT(IN) ::  routine !< name of calling subroutine or function
       CHARACTER(LEN=*), INTENT(IN) ::  message !< log message

       CALL report(routine, "ERROR: " // TRIM(message) // " Stopping.")
       STOP

    END SUBROUTINE inifor_abort


!------------------------------------------------------------------------------!
! Description:
! ------------
!> 
!> print_version() prints the INIFOR version number and copyright notice.
!------------------------------------------------------------------------------!
    SUBROUTINE print_version()
       PRINT *, "INIFOR " // VERSION
       PRINT *, COPYRIGHT
    END SUBROUTINE print_version


!------------------------------------------------------------------------------!
! Description:
! ------------
!> 
!> run_control() measures the run times of various parts of INIFOR and
!> accumulates them in timing budgets.
!------------------------------------------------------------------------------!
    SUBROUTINE run_control(mode, budget)

       CHARACTER(LEN=*), INTENT(IN) ::  mode   !< name of the calling mode
       CHARACTER(LEN=*), INTENT(IN) ::  budget !< name of the timing budget

       REAL(dp), SAVE ::  t0               !< begin of timing interval
       REAL(dp), SAVE ::  t1               !< end of timing interval
       REAL(dp), SAVE ::  t_comp  = 0.0_dp !< computation timing budget
       REAL(dp), SAVE ::  t_alloc = 0.0_dp !< allocation timing budget
       REAL(dp), SAVE ::  t_init  = 0.0_dp !< initialization timing budget
       REAL(dp), SAVE ::  t_read  = 0.0_dp !< reading timing budget
       REAL(dp), SAVE ::  t_total = 0.0_dp !< total time
       REAL(dp), SAVE ::  t_write = 0.0_dp !< writing timing budget

       CHARACTER(LEN=*), PARAMETER  ::  fmt='(F6.2)' !< floating-point output format


       SELECT CASE(TRIM(mode))

       CASE('init')
          CALL CPU_TIME(t0)

       CASE('time')

          CALL CPU_TIME(t1)

          SELECT CASE(TRIM(budget))

             CASE('alloc')
                t_alloc = t_alloc + t1 - t0

             CASE('init')
                t_init = t_init + t1 - t0

             CASE('read')
                t_read = t_read + t1 - t0

             CASE('write')
                t_write = t_write + t1 - t0

             CASE('comp')
                t_comp = t_comp + t1 - t0

             CASE DEFAULT
                CALL inifor_abort('run_control', "Time Budget '" // TRIM(mode) // "' is not supported.")

          END SELECT

          t0 = t1

       CASE('report')
           t_total = t_init + t_read + t_write + t_comp

           CALL report('run_control', " *** CPU time ***")

           CALL report('run_control', "Initialization: " // real_to_str(t_init)  // &
                       " s (" // TRIM(real_to_str(100*t_init/t_total, fmt))      // " %)")

           CALL report('run_control', "(De-)Allocation:" // real_to_str(t_alloc)  // &
                       " s (" // TRIM(real_to_str(100*t_alloc/t_total, fmt))      // " %)")

           CALL report('run_control', "Reading data:   " // real_to_str(t_read)  // &
                       " s (" // TRIM(real_to_str(100*t_read/t_total, fmt))      // " %)")

           CALL report('run_control', "Writing data:   " // real_to_str(t_write) // &
                       " s (" // TRIM(real_to_str(100*t_write/t_total, fmt))     // " %)")

           CALL report('run_control', "Computation:    " // real_to_str(t_comp)  // &
                       " s (" // TRIM(real_to_str(100*t_comp/t_total, fmt))      // " %)")

           CALL report('run_control', "Total:          " // real_to_str(t_total) // &
                       " s (" // TRIM(real_to_str(100*t_total/t_total, fmt))     // " %)")

       CASE DEFAULT
          CALL inifor_abort('run_control', "Mode '" // TRIM(mode) // "' is not supported.")

       END SELECT

    END SUBROUTINE run_control

 END MODULE inifor_control
#endif