3d79022abb
Part of #467. * tests/python/bdddict.py, tests/python/ltl2tgba.py, tests/python/ltlparse.py, tests/python/ltlsimple.py, tests/python/sccinfo.py, tests/python/simstate.py, tests/python/split.py, tests/python/tra2tba.py: Adjust to deal with a non-refcounted Python implementation.
142 lines
3.1 KiB
Python
142 lines
3.1 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Copyright (C) 2019, 2021 Laboratoire de Recherche et Développement de l'Epita
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# (LRDE).
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#
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# This file is part of Spot, a model checking library.
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#
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# Spot is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Spot is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Make sure we can leep track of BDD association in Python using bdd_dict, as
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# discussed in issue #372.
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# CPython use reference counting, so that automata are destructed
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# when we expect them to be. However other implementations like
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# PyPy may call destructors latter, causing different output.
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from platform import python_implementation
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if python_implementation() == 'CPython':
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def gcollect():
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pass
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else:
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import gc
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def gcollect():
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gc.collect()
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import spot
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class bdd_holder:
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def __init__(self, aut):
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self.bdddict = d = aut.get_dict()
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for ap in aut.ap():
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d.register_proposition(ap, self)
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def __del__(self):
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self.bdddict.unregister_all_my_variables(self)
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class bdd_holder2:
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def __init__(self, aut):
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self.bdddict = d = aut.get_dict()
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d.register_all_variables_of(aut, self)
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def __del__(self):
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self.bdddict.unregister_all_my_variables(self)
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class bdd_holder3:
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def __init__(self, h2):
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self.bdddict = d = h2.bdddict
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d.register_all_variables_of(h2, self)
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def __del__(self):
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self.bdddict.unregister_all_my_variables(self)
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def check_ok():
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assert type(bdict.varnum(spot.formula.ap("a"))) is int
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def check_nok():
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try:
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bdict.varnum(spot.formula.ap("a"))
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except IndexError as e:
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pass
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else:
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raise RuntimeError("missing exception")
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def debug(txt):
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# print(txt)
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# bdict.dump(spot.get_cout())
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pass
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aut = spot.translate("a U b")
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bdict = aut.get_dict()
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debug("aut")
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word = aut.accepting_word()
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debug("word")
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check_ok()
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h = bdd_holder(aut)
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debug("h")
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check_ok()
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h2 = bdd_holder2(aut)
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debug("h2")
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check_ok()
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del aut
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gcollect()
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debug("-aut")
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check_ok()
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del word
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gcollect()
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debug("-word")
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check_ok()
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del h
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gcollect()
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debug("-h")
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check_ok()
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del h2
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gcollect()
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debug("-h2")
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check_nok()
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h2 = bdd_holder2(spot.translate("a U b").accepting_word())
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debug("h2")
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h3 = bdd_holder3(h2)
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var = bdict.register_anonymous_variables(1, h3)
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debug("h3")
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assert var == 2
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del h2
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gcollect()
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debug("-h2")
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check_ok()
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del h3
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gcollect()
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debug("-h3")
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check_nok()
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h2 = bdd_holder2(spot.translate("a U b").accepting_word())
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debug("h2")
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bdict.unregister_variable(bdict.varnum("b"), h2)
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bdict.unregister_variable(bdict.varnum("a"), h2)
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debug("-b,-a")
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gcollect()
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check_nok()
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