-- This file is part of SmartEiffel The GNU Eiffel Compiler Tools and Libraries.
-- See the Copyright notice at the end of this file.
--
class TEST_WEAK_REF01
   -- Test GC of WEAK_REFERENCE[X] and X.
   -- X is a non-tagged reference type.

inherit
   EIFFELTEST_TOOLS

create {}
   make

feature {}
   wr_count: INTEGER 1_000

   make
      local
         mem: MEMORY; aux_wr: AUX_WEAK_REF01; wr: WEAK_REFERENCE[AUX_WEAK_REF01]; i, void_count: INTEGER
      do
         label_assert("mem.collecting", mem.collecting)

         create list.make
         create weak_list.make
         from
            i := 1
         until
            i > wr_count
         loop
            create aux_wr.make(Current)
            create wr.set_item(aux_wr)
            list.add_last(aux_wr)
            weak_list.add_last(wr)
            i := i + 1
         end
         aux_wr := Void
         wr := Void
         generate_garbage
         mem.collection_off
         label_assert("not mem.collecting", not mem.collecting)
         mem.full_collect
         label_assert("check no weak refs disposed", aux_wr_disposed = 0)

         from
            i := 1
         until
            i > wr_count
         loop
            label_assert("check weak_list.item(#(1))" # i.out, weak_list.item(i).item = list.item(i))
            i := i + 1
         end
         from
            i := 1
         until
            i > wr_count
         loop
            list.put(Void, i)
            i := i + 1
         end
         generate_garbage
         mem.collection_on
         mem.full_collect
         -- Actually, the next test is quite pessimistic
         label_assert("check some weak refs disposed (#(1))" # aux_wr_disposed.out, aux_wr_disposed > wr_count / 2)

         from
            i := 1
         until
            i > wr_count
         loop
            if weak_list.item(i).item = Void then
               void_count := void_count + 1
            end
            i := i + 1
         end
         -- Should be equal, but there may be other GC during the following call
         label_assert("check disposed weak refs are set to Void (#(1) = #(2))" # void_count.out # aux_wr_disposed.out, void_count >= aux_wr_disposed)
      end

   generate_garbage
      local
         i: INTEGER; s: STRING
      do
         from
            i := 1
         until
            i = 10_000
         loop
            create s.make_from_string("quark           ends here")
            i := i + 1
         end
      end
      -- We're using LISTs rather than ARRAYs because we don't want to have NATIVE_ARRAY[WEAK_REFERENCE[...]] in
      -- the first test. (Although they are actually not a special case)

   list: LINKED_LIST[AUX_WEAK_REF01]

   weak_list: LINKED_LIST[WEAK_REFERENCE[AUX_WEAK_REF01]]

   aux_wr_disposed: INTEGER

feature {AUX_WEAK_REF01}
   set_aux_wr_disposed
      do
         aux_wr_disposed := aux_wr_disposed + 1
      end

end -- class TEST_WEAK_REF01
--
-- ------------------------------------------------------------------------------------------------------------------------------
-- Copyright notice below. Please read.
--
-- SmartEiffel 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 2, or (at your option) any later version.
-- SmartEiffel 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 SmartEiffel; see the file COPYING. If not, write to the Free
-- Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
--
-- Copyright(C) 1994-2002: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.       - University of Nancy 1 - FRANCE
-- Copyright(C) 2003-2006: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne - University of Nancy 2 - FRANCE
--
-- Authors: Dominique COLNET, Philippe RIBET, Cyril ADRIAN, Vincent CROIZIER, Frederic MERIZEN
--
-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
-- ------------------------------------------------------------------------------------------------------------------------------