| -- C940010.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. |
| --* |
| -- |
| -- OBJECTIVE: |
| -- Check that if an exception is raised during the execution of an |
| -- entry body it is propagated back to the caller |
| -- |
| -- TEST DESCRIPTION: |
| -- Use a small fragment of code from the simulation of a freeway meter |
| -- used in c940007. Create three individual tasks which will be queued on |
| -- the entry as the barrier is set. Release them one at a time. A |
| -- procedure which is called within the entry has been modified for this |
| -- test to raise a different exception for each pass through. Check that |
| -- all expected exceptions are raised and propagated. |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 06 Dec 94 SAIC ACVC 2.0 |
| -- |
| --! |
| |
| |
| with Report; |
| with ImpDef; |
| |
| procedure C940010 is |
| |
| TC_Failed_1 : Boolean := false; |
| |
| begin |
| |
| Report.Test ("C940010", "Check that an exception raised in an entry " & |
| "body is propagated back to the caller"); |
| |
| declare -- encapsulate the test |
| |
| TC_Defined_Error : Exception; -- User defined exception |
| TC_Expected_Passage_Total : constant integer := 669; |
| TC_Int : constant integer := 5; |
| |
| -- Carrier tasks. One is created for each vehicle arriving at each ramp |
| task type Vehicle_31; -- For Ramp_31 |
| type acc_Vehicle_31 is access Vehicle_31; |
| |
| |
| --================================================================ |
| protected Ramp_31 is |
| |
| function Meter_in_Use_State return Boolean; |
| procedure Add_Meter_Queue; |
| procedure Subtract_Meter_Queue; |
| entry Wait_at_Meter; |
| procedure Pulse; |
| -- |
| procedure TC_Passage (Pass_Point : Integer); |
| function TC_Get_Passage_Total return integer; |
| function TC_Get_Current_Exception return integer; |
| |
| private |
| |
| Release_One_Vehicle : Boolean := false; |
| Meter_in_Use : Boolean := true; -- TC: set true for this test |
| -- |
| TC_Multiplier : integer := 1; |
| TC_Passage_Total : integer := 0; |
| -- Use this to cycle through the required exceptions |
| TC_Current_Exception : integer range 0..3 := 0; |
| |
| end Ramp_31; |
| --================================================================ |
| protected body Ramp_31 is |
| |
| |
| -- Trace the paths through the various routines by totaling the |
| -- weighted call parameters |
| procedure TC_Passage (Pass_Point : Integer) is |
| begin |
| TC_Passage_Total := TC_Passage_Total+(Pass_Point*TC_Multiplier); |
| end TC_Passage; |
| |
| -- For the final check of the whole test |
| function TC_Get_Passage_Total return integer is |
| begin |
| return TC_Passage_Total; |
| end TC_Get_Passage_Total; |
| |
| function TC_Get_Current_Exception return integer is |
| begin |
| return TC_Current_Exception; |
| end TC_Get_Current_Exception; |
| |
| |
| ----------------- |
| |
| function Meter_in_Use_State return Boolean is |
| begin |
| return Meter_in_Use; |
| end Meter_in_Use_State; |
| |
| -- Simulate the effects of the regular signal pulse |
| procedure Pulse is |
| begin |
| Release_one_Vehicle := true; |
| end Pulse; |
| |
| -- Keep count of vehicles currently on meter queue - we can't use |
| -- the 'count because we need the outcall trigger |
| procedure Add_Meter_Queue is |
| begin |
| null; --::: stub |
| end Add_Meter_Queue; |
| |
| -- TC: This routine has been modified to raise the required |
| -- exceptions |
| procedure Subtract_Meter_Queue is |
| TC_Pass_Point1 : constant integer := 10; |
| TC_Pass_Point2 : constant integer := 20; |
| TC_Pass_Point3 : constant integer := 30; |
| TC_Pass_Point9 : constant integer := 1000; -- error |
| begin |
| -- Cycle through the required exceptions, one per call |
| TC_Current_Exception := TC_Current_Exception + 1; |
| case TC_Current_Exception is |
| when 1 => |
| TC_Passage (TC_Pass_Point1); -- note passage through here |
| raise Storage_Error; -- PREDEFINED EXCEPTION |
| when 2 => |
| TC_Passage (TC_Pass_Point2); -- note passage through here |
| raise TC_Defined_Error; -- USER DEFINED EXCEPTION |
| when 3 => |
| TC_Passage (TC_Pass_Point3); -- note passage through here |
| -- RUN TIME EXCEPTION (Constraint_Error) |
| -- Add the value 3 to 5 then try to assign it to an object |
| -- whose range is 0..3 - this causes the exception. |
| -- Disguise the values which cause the Constraint_Error |
| -- so that the optimizer will not eliminate this code |
| -- Note: the variable is checked at the end to ensure |
| -- that the actual assignment is attempted. Also note |
| -- the value remains at 3 as the assignment does not |
| -- take place. This is the value that is checked at |
| -- the end of the test. |
| -- Otherwise the optimizer could decide that the result |
| -- of the assignment was not used so why bother to do it? |
| TC_Current_Exception := |
| Report.Ident_Int (TC_Current_Exception) + |
| Report.Ident_Int (TC_Int); |
| when others => |
| -- Set flag for Report.Failed which cannot be called from |
| -- within a Protected Object |
| TC_Failed_1 := True; |
| end case; |
| |
| TC_Passage ( TC_Pass_Point9 ); -- note passage through here |
| end Subtract_Meter_Queue; |
| |
| -- Here each Vehicle task queues itself awaiting release |
| entry Wait_at_Meter when Release_One_Vehicle is |
| -- Example of entry with barriers and persistent signal |
| TC_Pass_Point : constant integer := 2; |
| begin |
| TC_Passage ( TC_Pass_Point ); -- note passage through here |
| Release_One_Vehicle := false; -- Consume the signal |
| -- Decrement number of vehicles on ramp |
| Subtract_Meter_Queue; -- Call procedure from within entry body |
| end Wait_at_Meter; |
| |
| end Ramp_31; |
| --================================================================ |
| |
| -- Carrier task. One is created for each vehicle arriving at Ramp_31 |
| task body Vehicle_31 is |
| TC_Pass_Point_1 : constant integer := 100; |
| TC_Pass_Point_2 : constant integer := 200; |
| TC_Pass_Point_3 : constant integer := 300; |
| begin |
| if Ramp_31.Meter_in_Use_State then |
| -- Increment count of number of vehicles on ramp |
| Ramp_31.Add_Meter_Queue; -- Call a protected procedure |
| -- which is also called from within |
| -- enter the meter queue |
| Ramp_31.Wait_at_Meter; -- Call a protected entry |
| Report.Failed ("Exception not propagated back"); |
| end if; |
| null; --:::: call to the first in the series of the Ramp_Sensors |
| -- this "passes" the vehicle from one sensor to the next |
| exception |
| when Storage_Error => |
| Ramp_31.TC_Passage ( TC_Pass_Point_1 ); -- note passage |
| when TC_Defined_Error => |
| Ramp_31.TC_Passage ( TC_Pass_Point_2 ); -- note passage |
| when Constraint_Error => |
| Ramp_31.TC_Passage ( TC_Pass_Point_3 ); -- note passage |
| when others => |
| Report.Failed ("Unexpected exception in Vehicle Task"); |
| end Vehicle_31; |
| |
| -- Simulate the arrival of a vehicle at the Ramp_Receiver of Ramp_31 |
| -- and the generation of an accompanying carrier task |
| procedure New_Arrival_31 is |
| Next_Vehicle_Task_31: acc_Vehicle_31 := new Vehicle_31; |
| TC_Pass_Point : constant integer := 1; |
| begin |
| Ramp_31.TC_Passage ( TC_Pass_Point ); -- Note passage through here |
| null; --::: stub |
| end New_arrival_31; |
| |
| |
| |
| begin -- declare |
| |
| -- Test driver. This is ALL test control code |
| |
| -- Create three independent tasks which will queue themselves on the |
| -- entry. Each task will get a different exception |
| New_Arrival_31; |
| New_Arrival_31; |
| New_Arrival_31; |
| |
| delay ImpDef.Clear_Ready_Queue; |
| |
| -- Set the barrier condition of the entry true, releasing one task |
| Ramp_31.Pulse; |
| delay ImpDef.Clear_Ready_Queue; |
| |
| Ramp_31.Pulse; |
| delay ImpDef.Clear_Ready_Queue; |
| |
| Ramp_31.Pulse; |
| delay ImpDef.Clear_Ready_Queue; |
| |
| if (TC_Expected_Passage_Total /= Ramp_31.TC_Get_Passage_Total) or |
| -- Note: We are not really interested in this next check. It is |
| -- here to ensure the earlier statements which raised the |
| -- Constraint_Error are not optimized out |
| (Ramp_31.TC_Get_Current_Exception /= 3) then |
| Report.Failed ("Unexpected paths taken"); |
| end if; |
| |
| end; -- declare |
| |
| if TC_Failed_1 then |
| Report.Failed ("Bad path through Subtract_Meter_Queue"); |
| end if; |
| |
| Report.Result; |
| |
| end C940010; |
