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run_feature_6.e
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1999-06-05
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-- This file is part of SmallEiffel The GNU Eiffel Compiler.
-- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
-- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
-- http://SmallEiffel.loria.fr
-- 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 RUN_FEATURE_6
inherit RUN_FEATURE redefine base_feature end;
creation make
feature
base_feature: ONCE_FUNCTION;
arguments: FORMAL_ARG_LIST;
result_type: TYPE;
require_assertion: RUN_REQUIRE;
local_vars: LOCAL_VAR_LIST;
routine_body: COMPOUND;
rescue_compound: COMPOUND;
ensure_assertion: E_ENSURE;
feature
is_once_function: BOOLEAN is true;
is_static: BOOLEAN is false;
static_value_mem: INTEGER is 0;
feature
afd_check is
do
routine_afd_check;
end;
can_be_dropped: BOOLEAN is
do
Result := is_pre_computable;
end;
mapping_c is
do
if is_pre_computable then
cpp_once_result;
else
default_mapping_function;
end;
end;
c_define is
local
bfbc: BASE_CLASS;
do
bfbc := base_feature.base_class;
if is_pre_computable then
if not bfbc.once_flag(once_mark) then
once_variable;
end;
cpp.add_pre_computed_once_function(Current);
else
if not bfbc.once_flag(once_mark) then
once_boolean;
once_variable;
end;
define_prototype;
cpp.put_string("if(");
once_flag;
cpp.put_string("==0){%N");
c_define_opening;
once_flag;
cpp.put_string("=1;%N");
if routine_body /= Void then
routine_body.compile_to_c;
end;
c_define_closing;
cpp.put_string("}%N");
cpp.put_string("return ");
cpp_once_result;
cpp.put_string(";}%N");
c_frame_descriptor;
end;
end;
feature {ABSTRACT_RESULT}
cpp_once_result is
-- Produce the C name of the once Result.
do
c_code.clear;
once_result_in(c_code);
cpp.put_string(c_code);
end;
once_variable is
do
c_code.clear;
c_code.extend('T');
if result_type.is_expanded then
result_type.id.append_in(c_code);
c_code.extend(' ');
else
c_code.extend('0');
c_code.extend('*');
end;
once_result_in(c_code);
c_code2.clear;
result_type.c_initialize_in(c_code2);
cpp.put_extern5(c_code,c_code2);
end;
feature {CALL_PROC_CALL}
collect_c_tmp is
do
end;
feature {ADDRESS_OF_POOL}
address_of_c_define(caller: ADDRESS_OF) is
do
if run_control.boost then
if use_current then
else
address_of_c_define_wrapper(caller);
end;
else
address_of_c_define_wrapper(caller);
end;
end;
feature {ADDRESS_OF}
address_of_c_mapping is
do
if run_control.boost then
if use_current then
mapping_name;
else
address_of_c_mapping_wrapper;
end;
else
address_of_c_mapping_wrapper;
end;
end;
feature {C_PRETTY_PRINTER}
is_pre_computable: BOOLEAN is
do
if frozen_general.fast_has(name.to_string) then
Result := true;
elseif arguments = Void and then not use_current then
if routine_body = Void then
Result := true;
elseif not run_control.invariant_check then
Result := routine_body.is_pre_computable;
end;
end;
if Result then
if require_assertion /= Void then
require_assertion.clear_run_feature;
end;
if ensure_assertion /= Void then
ensure_assertion.clear_run_feature;
end;
end;
end;
c_pre_computing is
require
is_pre_computable;
cpp.on_c;
local
bfbc: BASE_CLASS;
do
bfbc := base_feature.base_class;
echo.put_character('%T');
echo.put_string(bfbc.name.to_string);
echo.put_character('.');
echo.put_string(name.to_string);
echo.put_character('%N');
if run_control.require_check then
if require_assertion /= Void then
require_assertion.compile_to_c;
end;
end;
if result_type.is_expanded then
-- *** Is this useful ? ***
cpp_once_result;
cpp.put_character('=');
result_type.c_initialize;
cpp.put_string(fz_00);
end;
if local_vars /= Void then
cpp.put_character('{');
local_vars.c_declare;
end;
if routine_body /= Void then
routine_body.compile_to_c;
end;
if run_control.ensure_check then
if ensure_assertion /= Void then
ensure_assertion.compile_to_c;
end;
end;
if local_vars /= Void then
cpp.put_character('}');
end;
cpp.put_string("/*PCO*/%N");
end;
tmp_string: STRING is
once
!!Result.make(10);
end;
feature {RUN_CLASS}
jvm_field_or_method is
do
jvm.add_method(Current);
end;
feature
mapping_jvm is
do
routine_mapping_jvm;
end;
feature {JVM}
jvm_define is
local
branch, idx_flag: INTEGER;
ca: like code_attribute;
do
ca := code_attribute;
idx_flag := once_routine_pool.idx_fieldref_for_flag(Current);
method_info_start;
ca.opcode_getstatic(idx_flag,1);
branch := ca.opcode_ifne;
ca.opcode_iconst_1;
ca.opcode_putstatic(idx_flag,-1);
jvm_define_opening;
if routine_body /= Void then
routine_body.compile_to_jvm;
end;
jvm_define_closing;
ca.resolve_u2_branch(branch);
jvm_result_load;
result_type.run_type.jvm_return_code;
method_info.finish;
end;
feature {ONCE_RESULT}
c_variable_name: STRING is
do
c_code.clear;
once_result_in(c_code);
Result := c_code;
end;
jvm_result_load is
local
result_space, idx_result: INTEGER;
do
result_space := result_type.jvm_stack_space;
idx_result := once_routine_pool.idx_fieldref_for_result(Current);
code_attribute.opcode_getstatic(idx_result,result_space);
end;
jvm_result_store is
local
result_space, idx_result: INTEGER;
do
result_space := result_type.jvm_stack_space;
idx_result := once_routine_pool.idx_fieldref_for_result(Current);
code_attribute.opcode_putstatic(idx_result,- result_space);
end;
fe_vffd7 is
do
eh.add_position(result_type.start_position);
fatal_error("Result type of a once function must %
%not be anchored (VFFD.7).");
end;
feature {RUN_FEATURE_6}
initialize is
do
result_type := base_feature.result_type;
arguments := base_feature.arguments;
if result_type.is_anchored then
fe_vffd7;
elseif result_type.is_formal_generic then
eh.add_position(result_type.start_position);
fatal_error("Result type of a once function must %
%not be a formal generic argument (VFFD.7).");
end;
result_type := result_type.to_runnable(current_type);
if arguments /= Void then
if not arguments.is_runnable(current_type) then
!!arguments.with(arguments,current_type);
end;
end;
local_vars := base_feature.local_vars;
if local_vars /= Void then
local_vars := local_vars.to_runnable(current_type);
end;
routine_body := base_feature.routine_body;
if routine_body /= Void then
routine_body := routine_body.to_runnable(current_type);
end;
if run_control.require_check then
require_assertion := run_require;
end;
if run_control.ensure_check then
ensure_assertion := run_ensure;
end;
rescue_compound := base_feature.rescue_compound;
if rescue_compound /= Void then
exceptions_handler.set_used;
rescue_compound := rescue_compound.to_runnable(current_type);
end;
once_routine_pool.add_function(Current);
end;
frozen_general: ARRAY[STRING] is
once
Result := <<as_std_error, as_std_input, as_io, as_std_output>>;
end;
compute_use_current is
do
std_compute_use_current;
end;
update_tmp_jvm_descriptor is
do
routine_update_tmp_jvm_descriptor;
end;
end -- RUN_FEATURE_6