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-- C980003.A
--
-- Grant of Unlimited Rights
--
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
-- unlimited rights in the software and documentation contained herein.
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
-- this public release, the Government intends to confer upon all
-- recipients unlimited rights equal to those held by the Government.
-- These rights include rights to use, duplicate, release or disclose the
-- released technical data and computer software in whole or in part, in
-- any manner and for any purpose whatsoever, and to have or permit others
-- to do so.
--
-- DISCLAIMER
--
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
-- PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- TEST OBJECTIVE:
-- Check that aborts are deferred during the execution of an
-- Initialize procedure (as the last step of the default
-- initialization of a controlled object), during the execution
-- of a Finalize procedure (as part of the finalization of a
-- controlled object), and during an assignment operation to an
-- object with a controlled part.
--
-- TEST DESCRIPTION:
-- A controlled type is created with Initialize, Adjust, and
-- Finalize operations. These operations note in a protected
-- object when the operation starts and completes. This change
-- in state of the protected object will open the barrier for
-- the entry in the protected object.
-- The test contains declarations of objects of the controlled
-- type. An asynchronous select is used to attempt to abort
-- the operations on the controlled type. The asynchronous select
-- makes use of the state change to the protected object to
-- trigger the abort.
--
--
-- CHANGE HISTORY:
-- 11 Jan 96 SAIC Initial Release for 2.1
-- 5 May 96 SAIC Incorporated Reviewer comments.
-- 10 Oct 96 SAIC Addressed issue where assignment statement
-- can be 2 assignment operations.
--
--!
with Ada.Finalization;
package C980003_0 is
Verbose : constant Boolean := False;
-- the following flag is set true whenever the
-- Initialize operation is called.
Init_Occurred : Boolean;
type Is_Controlled is new Ada.Finalization.Controlled with
record
Id : Integer;
end record;
procedure Initialize (Object : in out Is_Controlled);
procedure Finalize (Object : in out Is_Controlled);
procedure Adjust (Object : in out Is_Controlled);
type States is (Unknown,
Start_Init, Finished_Init,
Start_Adjust, Finished_Adjust,
Start_Final, Finished_Final);
protected State_Manager is
procedure Reset;
procedure Set (New_State : States);
function Current return States;
entry Wait_For_Change;
private
Current_State : States := Unknown;
Changed : Boolean := False;
end State_Manager;
end C980003_0;
with Report;
with ImpDef;
package body C980003_0 is
protected body State_Manager is
procedure Reset is
begin
Current_State := Unknown;
Changed := False;
end Reset;
procedure Set (New_State : States) is
begin
Changed := True;
Current_State := New_State;
end Set;
function Current return States is
begin
return Current_State;
end Current;
entry Wait_For_Change when Changed is
begin
Changed := False;
end Wait_For_Change;
end State_Manager;
procedure Initialize (Object : in out Is_Controlled) is
begin
if Verbose then
Report.Comment ("starting initialize");
end if;
State_Manager.Set (Start_Init);
if Verbose then
Report.Comment ("in initialize");
end if;
delay ImpDef.Switch_To_New_Task; -- tempting place for abort
State_Manager.Set (Finished_Init);
if Verbose then
Report.Comment ("finished initialize");
end if;
Init_Occurred := True;
end Initialize;
procedure Finalize (Object : in out Is_Controlled) is
begin
if Verbose then
Report.Comment ("starting finalize");
end if;
State_Manager.Set (Start_Final);
if Verbose then
Report.Comment ("in finalize");
end if;
delay ImpDef.Switch_To_New_Task; -- tempting place for abort
State_Manager.Set (Finished_Final);
if Verbose then
Report.Comment ("finished finalize");
end if;
end Finalize;
procedure Adjust (Object : in out Is_Controlled) is
begin
if Verbose then
Report.Comment ("starting adjust");
end if;
State_Manager.Set (Start_Adjust);
if Verbose then
Report.Comment ("in adjust");
end if;
delay ImpDef.Switch_To_New_Task; -- tempting place for abort
State_Manager.Set (Finished_Adjust);
if Verbose then
Report.Comment ("finished adjust");
end if;
end Adjust;
end C980003_0;
with Report;
with ImpDef;
with C980003_0; use C980003_0;
with Ada.Unchecked_Deallocation;
procedure C980003 is
procedure Check_State (Should_Be : States;
Msg : String) is
Cur : States := State_Manager.Current;
begin
if Cur /= Should_Be then
Report.Failed (Msg);
Report.Comment ("expected: " & States'Image (Should_Be) &
" found: " & States'Image (Cur));
elsif Verbose then
Report.Comment ("passed: " & Msg);
end if;
end Check_State;
begin
Report.Test ("C980003", "Check that aborts are deferred during" &
" initialization, finalization, and assignment" &
" operations on controlled objects");
Check_State (Unknown, "initial condition");
-- check that initialization and finalization take place
Init_Occurred := False;
select
State_Manager.Wait_For_Change;
then abort
declare
My_Controlled_Obj : Is_Controlled;
begin
delay 0.0; -- abort completion point
Report.Failed ("state change did not occur");
end;
end select;
if not Init_Occurred then
Report.Failed ("Initialize did not complete");
end if;
Check_State (Finished_Final, "init/final for declared item");
-- check adjust
State_Manager.Reset;
declare
Source, Dest : Is_Controlled;
begin
Check_State (Finished_Init, "adjust initial state");
Source.Id := 3;
Dest.Id := 4;
State_Manager.Reset; -- so we will wait for change
select
State_Manager.Wait_For_Change;
then abort
Dest := Source;
end select;
-- there are two implementation methods for the
-- assignment statement:
-- 1. no temporary was used in the assignment statement
-- thus the entire
-- assignment statement is abort deferred.
-- 2. a temporary was used in the assignment statement so
-- there are two assignment operations. An abort may
-- occur between the assignment operations
-- Various optimizations are allowed by 7.6 that can affect
-- how many times Adjust and Finalize are called.
-- Depending upon the implementation, the state can be either
-- Finished_Adjust or Finished_Finalize. If it is any other
-- state then the abort took place at the wrong time.
case State_Manager.Current is
when Finished_Adjust =>
if Verbose then
Report.Comment ("assignment aborted after adjust");
end if;
when Finished_Final =>
if Verbose then
Report.Comment ("assignment aborted after finalize");
end if;
when Start_Adjust =>
Report.Failed ("assignment aborted in adjust");
when Start_Final =>
Report.Failed ("assignment aborted in finalize");
when Start_Init =>
Report.Failed ("assignment aborted in initialize");
when Finished_Init =>
Report.Failed ("assignment aborted after initialize");
when Unknown =>
Report.Failed ("assignment aborted in unknown state");
end case;
if Dest.Id /= 3 then
if Verbose then
Report.Comment ("assignment not performed");
end if;
end if;
end;
-- check dynamically allocated objects
State_Manager.Reset;
declare
type Pointer_Type is access Is_Controlled;
procedure Free is new Ada.Unchecked_Deallocation (
Is_Controlled, Pointer_Type);
Ptr : Pointer_Type;
begin
-- make sure initialize is done when object is allocated
Ptr := new Is_Controlled;
Check_State (Finished_Init, "init when item allocated");
-- now try aborting the finalize
State_Manager.Reset;
select
State_Manager.Wait_For_Change;
then abort
Free (Ptr);
end select;
Check_State (Finished_Final, "finalization in dealloc");
end;
Report.Result;
end C980003;
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