Amiga ACS 1998 #4/amigaacscoverdisc1998-041998.iso/utilities/shareware/dev/ppcsmalleiffel/lib_se/once_routine_pool.e

Text File | 1998-01-16 | 6.3 KB | 277 lines

--          This file is part of SmallEiffel The GNU Eiffel Compiler.
--          Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
--            Dominique COLNET and Suzanne COLLIN - [e-mail]
--                       http://www.loria.fr/SmallEiffel
-- SmallEiffel 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. SmallEiffel 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  SmallEiffel;  see the file COPYING.  If not,
-- write to the  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class ONCE_ROUTINE_POOL
   --
   -- Unique global object in charge of runnable once routines.
   --

inherit GLOBALS;

feature {NONE}

   procedure_list: FIXED_ARRAY[RUN_FEATURE_5] is
      once
     !!Result.with_capacity(32);
      end;

   procedure_flag_list: FIXED_ARRAY[INTEGER];

   function_list: FIXED_ARRAY[RUN_FEATURE_6] is
      once
     !!Result.with_capacity(32);
      end;

   function_flag_list: FIXED_ARRAY[INTEGER];

   flag_list: FIXED_ARRAY[INTEGER] is
      once
     !!Result.with_capacity(32);
      end;

feature {RUN_FEATURE_5}

   add_procedure(rf5: RUN_FEATURE_5) is
      require
     rf5 /= Void
      do
     check
        not procedure_list.has(rf5)
     end;
     procedure_list.add_last(rf5);
      end;

feature {RUN_FEATURE_6}

   add_function(rf6: RUN_FEATURE_6) is
      require
     rf6 /= Void
      do
     check
        not function_list.has(rf6)
     end;
     function_list.add_last(rf6);
      end;

feature {GC_HANDLER}

   gc_mark_in(str: STRING) is
      local
     i, id: INTEGER;
     rf6: RUN_FEATURE_6;
     t: TYPE;
      do
     if function_list.count > 0 then
        from
           i := function_list.upper;
        until
           i < 0
        loop
           rf6 := function_list.item(i);
           t := rf6.result_type;
           if t.need_gc_mark_function then
          id := t.id;
          if t.is_reference then
             str.append(fz_c_if_neq_null);
             rf6.once_result_in(str);
             str.extend(')');
             str.append(fz_gc_mark);
             id.append_in(str);
             str.extend('(');
             str.append(fz_cast_void_star);
             rf6.once_result_in(str);
             str.extend(')');
          elseif t.is_user_expanded then
          else
          end;
          str.append(fz_00);
           end;
           i := i - 1;
        end;
     end;

      end;

feature {JVM}

   fields_count: INTEGER;

   jvm_define_fields is
      local
     byte_idx, idx_flag, i: INTEGER;
     rf5: RUN_FEATURE_5;
     rf6: RUN_FEATURE_6;
     bf: E_FEATURE;
     name_list: FIXED_ARRAY[INTEGER];
      do
     !!name_list.with_capacity(fields_count);
     if function_list.count > 0 then
        from
           i := function_list.upper;
           byte_idx := constant_pool.idx_uft8(fz_41);
        until
           i < 0
        loop
           rf6 := function_list.item(i);
           bf := rf6.base_feature;
           idx_flag := idx_name_for_flag(bf);
           if name_list.fast_has(idx_flag) then
           else
          name_list.add_last(idx_flag);
          -- ---------- Static field for flag :
          field_info.add(9,idx_flag,byte_idx);
          -- ---------- Static field for result :
          field_info.add(9,
                 idx_name_for_result(bf),
                 idx_descriptor(rf6.result_type.run_type));
           end;
           i := i - 1;
        end;
     end;
     if procedure_list.count > 0 then
        from
           i := procedure_list.upper;
           byte_idx := constant_pool.idx_uft8(fz_41);
        until
           i < 0
        loop
           rf5 := procedure_list.item(i);
           bf := rf5.base_feature;
           idx_flag := idx_name_for_flag(bf);
           if name_list.fast_has(idx_flag) then
           else
          name_list.add_last(idx_flag);
          -- ---------- Static field for flag :
          field_info.add(9,idx_flag,byte_idx);
           end;
           i := i - 1;
        end;
     end;
      end;

   jvm_initialize_fields is
      local
     i: INTEGER;
      do
     if flag_list.count > 0 then
        from
           i := flag_list.upper;
        until
           i < 0
        loop
           -- Set once flag :
           code_attribute.opcode_iconst_0;
           code_attribute.opcode_putstatic(flag_list.item(i),-1);
           i := i - 1;
        end;
     end;
      end;

feature {RUN_FEATURE_5,RUN_FEATURE_6}

   idx_fieldref_for_flag(rf: RUN_FEATURE): INTEGER is
      require
     rf /= Void
      do
     prepare_flag(rf.base_feature);
     Result := constant_pool.idx_fieldref3(jvm_root_class,
                           flag_string,
                           fz_41);
      end;

feature {RUN_FEATURE_6}

   idx_fieldref_for_result(rf6: RUN_FEATURE_6): INTEGER is
      require
     rf6 /= Void
      do
     prepare_result(rf6.base_feature);
     prepare_descriptor(rf6.result_type.run_type);
     Result := constant_pool.idx_fieldref3(jvm_root_class,
                           result_string,
                           descriptor_string);
      end;


feature {NONE}

   idx_descriptor(rt: TYPE): INTEGER is
      require
     rt /= Void
      do
     prepare_descriptor(rt);
     Result := constant_pool.idx_uft8(descriptor_string);
      end

   idx_name_for_result(bf: E_FEATURE): INTEGER is
      require
     bf /= Void
      do
     prepare_result(bf);
     Result := constant_pool.idx_uft8(result_string);
      end

   idx_name_for_flag(bf: E_FEATURE): INTEGER is
      require
     bf /= Void
      do
     prepare_flag(bf);
     Result := constant_pool.idx_uft8(flag_string);
      end

   flag_string: STRING is
      once
     !!Result.make(32);
      end;

   prepare_flag(bf: E_FEATURE) is
      do
     flag_string.clear;
     flag_string.extend('f');
     bf.base_class.id.append_in(flag_string);
     flag_string.append(bf.first_name.to_key);
      end;

   result_string: STRING is
      once
     !!Result.make(32);
      end;

   prepare_result(bf: E_FEATURE) is
      do
     result_string.clear;
     result_string.extend('r');
     bf.base_class.id.append_in(result_string);
     result_string.append(bf.first_name.to_key);
      end;

   prepare_descriptor(rt: TYPE) is
      do
     descriptor_string.clear;
     if rt.is_reference then
        descriptor_string.append(jvm_root_descriptor)
     else
        rt.jvm_descriptor_in(descriptor_string)
     end;
      end;

   descriptor_string: STRING is
      once
     !!Result.make(32);
      end;

end -- ONCE_ROUTINE_POOL