| -- C953002.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 the servicing of entry queues of a protected object |
| -- continues until there are no open entries with queued calls |
| -- and that this takes place as part of a single protected |
| -- operation. |
| -- |
| -- TEST DESCRIPTION: |
| -- This test enqueues a bunch of tasks on the entries of the |
| -- protected object Main_PO. At the same time another bunch of |
| -- of tasks are queued on the single entry of protected object |
| -- Holding_Pen. |
| -- Once all the tasks have had time to block, the main procedure |
| -- opens all the entries for Main_PO by calling the |
| -- Start_Protected_Operation protected procedure. This should |
| -- process all the pending callers as part of a single protected |
| -- operation. |
| -- During this protected operation, the entries of Main_PO release |
| -- the tasks blocked on Holding_Pen by calling the protected |
| -- procedure Release. |
| -- Once released from Holding_Pen, the task immediately calls |
| -- an entry in Main_PO. |
| -- These new calls should not gain access to Main_PO until |
| -- the initial protected operation on that object completes. |
| -- The order in which the entry calls on Main_PO are taken is |
| -- recorded in a global array and checked after all the tasks |
| -- have terminated. |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 25 OCT 95 SAIC ACVC 2.1 |
| -- 15 JAN 95 SAIC Fixed deadlock problem. |
| -- |
| --! |
| |
| with Report; |
| procedure C953002 is |
| Verbose : constant Boolean := False; |
| |
| Half_Tasks : constant := 15; -- how many tasks of each group |
| Max_Tasks : constant := Half_Tasks * 2; -- total number of tasks |
| |
| Note_Order : array (1..Max_Tasks) of Integer := (1..Max_Tasks => 0); |
| Note_Cnt : Integer := 0; |
| begin |
| Report.Test ("C953002", |
| "Check that the servicing of entry queues handles all" & |
| " open entries as part of a single protected operation"); |
| declare |
| task type Assault_PO is |
| entry Take_ID (Id : Integer); |
| end Assault_PO; |
| |
| First_Wave : array (1 .. Half_Tasks) of Assault_PO; |
| Second_Wave : array (1 .. Half_Tasks) of Assault_PO; |
| |
| protected Main_PO is |
| entry E0 (Who : Integer); |
| entry E1 (Who : Integer); |
| entry E2 (Who : Integer); |
| entry E3 (Who : Integer); |
| entry All_Present; |
| procedure Start_Protected_Operation; |
| private |
| Open : Boolean := False; |
| end Main_PO; |
| |
| protected Holding_Pen is |
| -- Note that Release is called by tasks executing in |
| -- the protected object Main_PO. |
| entry Wait (Who : Integer); |
| entry All_Present; |
| procedure Release; |
| private |
| Open : Boolean := False; |
| end Holding_Pen; |
| |
| |
| protected body Main_PO is |
| procedure Start_Protected_Operation is |
| begin |
| Open := True; |
| -- at this point all the First_Wave tasks are |
| -- waiting at the entries and all of them should |
| -- be processed as part of the protected operation. |
| end Start_Protected_Operation; |
| |
| entry All_Present when E0'Count + E1'Count + E2'Count + E3'Count = |
| Max_Tasks / 2 is |
| begin |
| null; -- all tasks are waiting |
| end All_Present; |
| |
| entry E0 (Who : Integer) when Open is |
| begin |
| Holding_Pen.Release; |
| -- note the order in which entry calls are handled. |
| Note_Cnt := Note_Cnt + 1; |
| Note_Order (Note_Cnt) := Who; |
| end E0; |
| |
| entry E1 (Who : Integer) when Open is |
| begin |
| Holding_Pen.Release; |
| Note_Cnt := Note_Cnt + 1; |
| Note_Order (Note_Cnt) := Who; |
| end E1; |
| |
| entry E2 (Who : Integer) when Open is |
| begin |
| Holding_Pen.Release; |
| Note_Cnt := Note_Cnt + 1; |
| Note_Order (Note_Cnt) := Who; |
| end E2; |
| |
| entry E3 (Who : Integer) when Open is |
| begin |
| Holding_Pen.Release; |
| Note_Cnt := Note_Cnt + 1; |
| Note_Order (Note_Cnt) := Who; |
| end E3; |
| end Main_PO; |
| |
| |
| protected body Holding_Pen is |
| procedure Release is |
| begin |
| Open := True; |
| end Release; |
| |
| entry All_Present when Wait'Count = Max_Tasks / 2 is |
| begin |
| null; -- all tasks waiting |
| end All_Present; |
| |
| entry Wait (Who : Integer) when Open is |
| begin |
| null; -- unblock the task |
| end Wait; |
| end Holding_Pen; |
| |
| task body Assault_PO is |
| Me : Integer; |
| begin |
| accept Take_Id (Id : Integer) do |
| Me := Id; |
| end Take_Id; |
| if Me >= 200 then |
| Holding_Pen.Wait (Me); |
| end if; |
| case Me mod 4 is |
| when 0 => Main_PO.E0 (Me); |
| when 1 => Main_PO.E1 (Me); |
| when 2 => Main_PO.E2 (Me); |
| when 3 => Main_PO.E3 (Me); |
| when others => null; -- cant happen |
| end case; |
| if Verbose then |
| Report.Comment ("task" & Integer'Image (Me) & |
| " done"); |
| end if; |
| exception |
| when others => |
| Report.Failed ("exception in task"); |
| end Assault_PO; |
| |
| begin -- test encapsulation |
| for I in First_Wave'Range loop |
| First_Wave (I).Take_ID (100 + I); |
| end loop; |
| for I in Second_Wave'Range loop |
| Second_Wave (I).Take_ID (200 + I); |
| end loop; |
| |
| -- let all the tasks get blocked |
| Main_PO.All_Present; |
| Holding_Pen.All_Present; |
| |
| -- let the games begin |
| if Verbose then |
| Report.Comment ("starting protected operation"); |
| end if; |
| Main_PO.Start_Protected_Operation; |
| |
| -- wait for all the tasks to complete |
| if Verbose then |
| Report.Comment ("waiting for tasks to complete"); |
| end if; |
| end; |
| |
| -- make sure all tasks registered their order |
| if Note_Cnt /= Max_Tasks then |
| Report.Failed ("task registration count wrong. " & |
| Integer'Image (Note_Cnt)); |
| end if; |
| |
| -- check the order in which entries were handled. |
| -- all the 100 level items should be handled as part of the |
| -- first protected operation and thus should be completed |
| -- before any 200 level item. |
| |
| if Verbose then |
| for I in 1..Max_Tasks loop |
| Report.Comment ("order" & Integer'Image (I) & " is" & |
| Integer'Image (Note_Order (I))); |
| end loop; |
| end if; |
| for I in 2 .. Max_Tasks loop |
| if Note_Order (I) < 200 and |
| Note_Order (I-1) >= 200 then |
| Report.Failed ("protected operation failure" & |
| Integer'Image (Note_Order (I-1)) & |
| Integer'Image (Note_Order (I))); |
| end if; |
| end loop; |
| |
| Report.Result; |
| end C953002; |
