source: palm/trunk/UTIL/inifor/src/inifor_control.f90 @ 3961

!> @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 2017-2019 Leibniz Universitaet Hannover
! Copyright 2017-2019 Deutscher Wetterdienst Offenbach
!------------------------------------------------------------------------------!
!
! Current revisions:
! -----------------
! 
! 
! Former revisions:
! -----------------
! $Id: inifor_control.f90 3866 2019-04-05 14:25:01Z suehring $
! Use PALM's working precision
! Renamed run_control -> log_runtime
! Open log file only once
! Improved coding style
! 
! 
! 3785 2019-03-06 10:41:14Z eckhard
! 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.
!------------------------------------------------------------------------------!
 MODULE inifor_control

    USE inifor_defs,                                                           &
        ONLY:  COPYRIGHT, LNAME, LOG_FILE_NAME, VERSION, wp
    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
    INTEGER, SAVE        ::  u            !< Fortran file unit for the log file

 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

    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=LOG_FILE_NAME, STATUS='replace' )
       is_first_run = .FALSE.
    ENDIF
       

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

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

 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.")
    CALL close_log
    STOP

 END SUBROUTINE inifor_abort


 SUBROUTINE close_log()

    CLOSE(u)

 END SUBROUTINE close_log


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


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

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

    REAL(wp), SAVE ::  t0               !< begin of timing interval
    REAL(wp), SAVE ::  t1               !< end of timing interval
    REAL(wp), SAVE ::  t_comp  = 0.0_wp !< computation timing budget
    REAL(wp), SAVE ::  t_alloc = 0.0_wp !< allocation timing budget
    REAL(wp), SAVE ::  t_init  = 0.0_wp !< initialization timing budget
    REAL(wp), SAVE ::  t_read  = 0.0_wp !< reading timing budget
    REAL(wp), SAVE ::  t_total = 0.0_wp !< total time
    REAL(wp), SAVE ::  t_write = 0.0_wp !< 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('log_runtime', "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('log_runtime', " *** CPU time ***")

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

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

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

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

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

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

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

    END SELECT

 END SUBROUTINE log_runtime

 END MODULE inifor_control