# GIMP - The GNU Image Manipulation Program
# Copyright (C) 1995 Spencer Kimball and Peter Mattis

# This program 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.

# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.

# "Perlized" from C source by Manish Singh <yosh@gimp.org>

sub debug_timer_start {
    $blurb = 'Starts measuring elapsed time.';

    $help = <<'HELP';
This procedure starts a timer, measuring the elapsed time since the call.
Each call to this procedure should be matched by a call to
gimp_debug_timer_end(), which returns the elapsed time.

If there is already an active timer, it is not affected by the call, however, a
matching gimp_debug_timer_end() call is still required.
HELP

    &ell_pdb_misc('2017');

    &std_pdb_debug();

    %invoke = (
	code => <<'CODE'
{
  if (gimp_debug_timer_counter++ == 0)
    gimp_debug_timer = g_timer_new ();
}
CODE
    );
}

sub debug_timer_end {
    $blurb = 'Finishes measuring elapsed time.';

    $help = <<'HELP';
This procedure stops the timer started by a previous gimp_debug_timer_start()
call, and prints and returns the elapsed time.

If there was already an active timer at the time of corresponding call to
gimp_debug_timer_start(), a dummy value is returned.
HELP

    &ell_pdb_misc('2017');

    &std_pdb_debug();

    @outargs = (
        { name => 'elapsed', type => 'float',
          desc => 'The elapsed time, in seconds' }
    );


    %invoke = (
	code => <<'CODE'
{
  elapsed = 0.0;

  if (gimp_debug_timer_counter == 0)
    success = FALSE;
  else if (--gimp_debug_timer_counter == 0)
    {
      elapsed = g_timer_elapsed (gimp_debug_timer, NULL);

      g_printerr ("GIMP debug timer: %g seconds\n", elapsed);

      g_timer_destroy (gimp_debug_timer);

      gimp_debug_timer = NULL;
    }
}
CODE
    );
}


$extra{app}->{code} = <<'CODE';
static GTimer *gimp_debug_timer         = NULL;
static gint    gimp_debug_timer_counter = 0;
CODE


@procs = qw(debug_timer_start debug_timer_end);

%exports = (app => [@procs], lib => [@procs]);

$desc = 'Debug';
$doc_title = 'gimpdebug';
$doc_short_desc = 'Debug utility functions';
$doc_long_desc = 'Miscellaneous debug utility functions. Not part of the stable library interface.';

1;