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Diffstat (limited to 'gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954021.a')
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diff --git a/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954021.a b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954021.a new file mode 100644 index 000000000..626f2f970 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/ada/acats/tests/c9/c954021.a @@ -0,0 +1,524 @@ +-- C954021.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 a requeue within a protected entry to an entry in a +-- different protected object is queued correctly. +-- +-- TEST DESCRIPTION: +-- One transaction is sent through to check the paths. After processing +-- this the Credit task sets the "overloaded" indicator. Once this +-- indicator is set the Distributor (a protected object) queues low +-- priority transactions on a Wait_for_Underload queue in another +-- protected object using a requeue. The Distributor still delivers high +-- priority transactions. After two high priority transactions have been +-- processed by the Credit task it clears the overload condition. The +-- low priority transactions should now be delivered. +-- +-- This series of tests uses a simulation of a transaction driven +-- processing system. Line Drivers accept input from an external source +-- and build them into transaction records. These records are then +-- encapsulated in message tasks which remain extant for the life of the +-- transaction in the system. The message tasks put themselves on the +-- input queue of a Distributor which, from information in the +-- transaction and/or system load conditions forwards them to other +-- operating tasks. These in turn might forward the transactions to yet +-- other tasks for further action. The routing is, in real life, dynamic +-- and unpredictable at the time of message generation. All rerouting in +-- this model is done by means of requeues. +-- +-- +-- CHANGE HISTORY: +-- 06 Dec 94 SAIC ACVC 2.0 +-- 26 Nov 95 SAIC Fixed shared global variable for ACVC 2.0.1 +-- +--! + +with Report; +with ImpDef; + +procedure C954021 is + + -- Arbitrary test values + Credit_Return : constant := 1; + Debit_Return : constant := 2; + + + -- Mechanism to count the number of Credit Message tasks completed + protected TC_Tasks_Completed is + procedure Increment; + function Count return integer; + private + Number_Complete : integer := 0; + end TC_Tasks_Completed; + + + TC_Credit_Messages_Expected : constant integer := 5; + + protected TC_Handshake is + procedure Set; + function First_Message_Arrived return Boolean; + private + Arrived_Flag : Boolean := false; + end TC_Handshake; + + -- Handshaking mechanism between the Line Driver and the Credit task + -- + protected body TC_Handshake is + -- + procedure Set is + begin + Arrived_Flag := true; + end Set; + -- + function First_Message_Arrived return Boolean is + begin + return Arrived_Flag; + end First_Message_Arrived; + -- + end TC_Handshake; + + + protected type Shared_Boolean (Initial_Value : Boolean := False) is + procedure Set_True; + procedure Set_False; + function Value return Boolean; + private + Current_Value : Boolean := Initial_Value; + end Shared_Boolean; + + protected body Shared_Boolean is + procedure Set_True is + begin + Current_Value := True; + end Set_True; + + procedure Set_False is + begin + Current_Value := False; + end Set_False; + + function Value return Boolean is + begin + return Current_Value; + end Value; + end Shared_Boolean; + + TC_Debit_Message_Complete : Shared_Boolean (False); + + type Transaction_Code is (Credit, Debit); + type Transaction_Priority is (High, Low); + + type Transaction_Record; + type acc_Transaction_Record is access Transaction_Record; + type Transaction_Record is + record + ID : integer := 0; + Code : Transaction_Code := Debit; + Priority : Transaction_Priority := High; + Account_Number : integer := 0; + Stock_Number : integer := 0; + Quantity : integer := 0; + Return_Value : integer := 0; + TC_Message_Count : integer := 0; + TC_Thru_Dist : Boolean := false; + end record; + + + task type Message_Task is + entry Accept_Transaction (In_Transaction : acc_Transaction_Record); + end Message_Task; + type acc_Message_Task is access Message_Task; + + task Line_Driver is + entry Start; + end Line_Driver; + + protected Distributor is + procedure Set_Credit_Overloaded; + procedure Clear_Credit_Overloaded; + function Credit_is_Overloaded return Boolean; + entry Input (Transaction : acc_Transaction_Record); + private + Credit_Overloaded : Boolean := false; + end Distributor; + + protected Hold is + procedure Underloaded; + entry Wait_for_Underload (Transaction : acc_Transaction_Record); + private + Release_All : Boolean := false; + end Hold; + + task Credit_Computation is + entry Input(Transaction : acc_Transaction_Record); + end Credit_Computation; + + task Debit_Computation is + entry Input(Transaction : acc_Transaction_Record); + end Debit_Computation; + + -- + -- Dispose each input Transaction_Record to the appropriate + -- computation tasks + -- + protected body Distributor is + + procedure Set_Credit_Overloaded is + begin + Credit_Overloaded := true; + end Set_Credit_Overloaded; + + procedure Clear_Credit_Overloaded is + begin + Credit_Overloaded := false; + Hold.Underloaded; -- Release all held messages + end Clear_Credit_Overloaded; + + function Credit_is_Overloaded return Boolean is + begin + return Credit_Overloaded; + end Credit_is_Overloaded; + + + entry Input (Transaction : acc_Transaction_Record) when true is + -- barrier is always open + begin + -- Test Control: Set the indicator in the message to show it has + -- passed through the Distributor object + Transaction.TC_thru_Dist := true; + + -- Pass this transaction on to the appropriate computation + -- task but temporarily hold low-priority transactions under + -- overload conditions + case Transaction.Code is + when Credit => + if Credit_Overloaded and Transaction.Priority = Low then + requeue Hold.Wait_for_Underload with abort; + else + requeue Credit_Computation.Input with abort; + end if; + when Debit => + requeue Debit_Computation.Input with abort; + end case; + end Input; + end Distributor; + + + -- Low priority Message tasks are held on the Wait_for_Underload queue + -- while the Credit computation system is overloaded. Once the Credit + -- system reached underload send all queued messages immediately + -- + protected body Hold is + + -- Once this is executed the barrier condition for the entry is + -- evaluated + procedure Underloaded is + begin + Release_All := true; + end Underloaded; + + entry Wait_for_Underload (Transaction : acc_Transaction_Record) + when Release_All is + begin + requeue Credit_Computation.Input with abort; + if Wait_for_Underload'count = 0 then + -- Queue is purged. Set up to hold next batch + Release_All := false; + end if; + end Wait_for_Underload; + + end Hold; + + -- Mechanism to count the number of Message tasks completed (Credit) + protected body TC_Tasks_Completed is + procedure Increment is + begin + Number_Complete := Number_Complete + 1; + end Increment; + + function Count return integer is + begin + return Number_Complete; + end Count; + end TC_Tasks_Completed; + + + -- Assemble messages received from an external source + -- Creates a message task for each. The message tasks remain extant + -- for the life of the messages in the system. + -- The Line Driver task would normally be designed to loop continuously + -- creating the messages as input is received. Simulate this + -- but limit it to the required number of dummy messages needed for + -- this test and allow it to terminate at that point. Artificially + -- alternate High and Low priority Credit transactions for this test. + -- + task body Line_Driver is + Current_ID : integer := 1; + Current_Priority : Transaction_Priority := High; + + -- Artificial: number of messages required for this test + type TC_Trans_Range is range 1..6; + + procedure Build_Credit_Record + ( Next_Transaction : acc_Transaction_Record ) is + Dummy_Account : constant integer := 100; + begin + Next_Transaction.ID := Current_ID; + Next_Transaction.Code := Credit; + Next_Transaction.Priority := Current_Priority; + + Next_Transaction.Account_Number := Dummy_Account; + Current_ID := Current_ID + 1; + end Build_Credit_Record; + + + procedure Build_Debit_Record + ( Next_Transaction : acc_Transaction_Record ) is + Dummy_Account : constant integer := 200; + begin + Next_Transaction.ID := Current_ID; + Next_Transaction.Code := Debit; + + Next_Transaction.Account_Number := Dummy_Account; + Current_ID := Current_ID + 1; + end Build_Debit_Record; + + begin + + accept Start; -- Wait for trigger from Main + + for Transaction_Numb in TC_Trans_Range loop -- TC: limit the loop + declare + -- Create a task for the next message + Next_Message_Task : acc_Message_Task := new Message_Task; + -- Create a record for it + Next_Transaction : acc_Transaction_Record := + new Transaction_Record; + begin + if Transaction_Numb = TC_Trans_Range'first then + -- Send the first Credit message + Build_Credit_Record ( Next_Transaction ); + Next_Message_Task.Accept_Transaction ( Next_Transaction ); + -- TC: Wait until the first message has been received by the + -- Credit task and it has set the Overload indicator for the + -- Distributor + while not TC_Handshake.First_Message_Arrived loop + delay ImpDef.Minimum_Task_Switch; + end loop; + elsif Transaction_Numb = TC_Trans_Range'last then + -- For this test send the last transaction to the Debit task + -- to improve the mix + Build_Debit_Record( Next_Transaction ); + Next_Message_Task.Accept_Transaction ( Next_Transaction ); + else + -- TC: Alternate high and low priority transactions + if Current_Priority = High then + Current_Priority := Low; + else + Current_Priority := High; + end if; + Build_Credit_Record( Next_Transaction ); + Next_Message_Task.Accept_Transaction ( Next_Transaction ); + end if; + end; -- declare + end loop; + + exception + when others => + Report.Failed ("Unexpected exception in Line_Driver"); + end Line_Driver; + + + + + task body Message_Task is + + TC_Original_Transaction_Code : Transaction_Code; + This_Transaction : acc_Transaction_Record := new Transaction_Record; + + begin + + accept Accept_Transaction (In_Transaction : acc_Transaction_Record) do + This_Transaction.all := In_Transaction.all; + end Accept_Transaction; + + -- Note the original code to ensure correct return + TC_Original_Transaction_Code := This_Transaction.Code; + + -- Queue up on Distributor's Input queue + Distributor.Input ( This_Transaction ); + -- This task will now wait for the requeued rendezvous + -- to complete before proceeding + + -- After the required computations have been performed + -- return the Transaction_Record appropriately (probably to an output + -- line driver) + null; -- stub + + -- For the test check that the return values are as expected + if TC_Original_Transaction_Code /= This_Transaction.Code then + -- Incorrect rendezvous + Report.Failed ("Message Task: Incorrect code returned"); + end if; + + if This_Transaction.Code = Credit then + if This_Transaction.Return_Value /= Credit_Return or + not This_Transaction.TC_thru_Dist then + Report.Failed ("Expected path not traversed - Credit"); + end if; + TC_Tasks_Completed.Increment; + else + if This_Transaction.Return_Value /= Debit_Return or + This_Transaction.TC_Message_Count /= 1 or + not This_Transaction.TC_thru_Dist then + Report.Failed ("Expected path not traversed - Debit"); + end if; + TC_Debit_Message_Complete.Set_True; + end if; + + exception + when others => + Report.Failed ("Unexpected exception in Message_Task"); + end Message_Task; + + + + + + -- Computation task. After the computation is performed the rendezvous + -- in the original message task is completed. + task body Credit_Computation is + + Message_Count : integer := 0; + + begin + loop + select + accept Input ( Transaction : acc_Transaction_Record) do + if Distributor.Credit_is_Overloaded + and Transaction.Priority = Low then + -- We should not be getting any Low Priority messages. They + -- should be waiting on the Hold.Wait_for_Underload + -- queue + Report.Failed + ("Credit Task: Low priority transaction during overload"); + end if; + -- Perform the computations required for this transaction + null; -- stub + + -- For the test: + if not Transaction.TC_thru_Dist then + Report.Failed + ("Credit Task: Wrong queue, Distributor bypassed"); + end if; + if Transaction.code /= Credit then + Report.Failed + ("Credit Task: Requeue delivered to the wrong queue"); + end if; + + -- The following is all Test Control code: + Transaction.Return_Value := Credit_Return; + Message_Count := Message_Count + 1; + -- + -- Now take special action depending on which Message + if Message_Count = 1 then + -- After the first message : + Distributor.Set_Credit_Overloaded; + -- Now flag the Line_Driver that the second and subsequent + -- messages may now be sent + TC_Handshake.Set; + end if; + if Message_Count = 3 then + -- The two high priority transactions created subsequent + -- to the overload have now been processed + Distributor.Clear_Credit_Overloaded; + end if; + end Input; + or + terminate; + end select; + end loop; + exception + when others => + Report.Failed ("Unexpected exception in Credit_Computation"); + end Credit_Computation; + + + + -- Computation task. After the computation is performed the rendezvous + -- in the original message task is completed. + -- + task body Debit_Computation is + Message_Count : integer := 0; + begin + loop + select + accept Input (Transaction : acc_Transaction_Record) do + -- Perform the computations required for this message + null; -- stub + + -- For the test: + if not Transaction.TC_thru_Dist then + Report.Failed + ("Debit Task: Wrong queue, Distributor bypassed"); + end if; + if Transaction.code /= Debit then + Report.Failed + ("Debit Task: Requeue delivered to the wrong queue"); + end if; + + -- for the test plug a known value and count + Transaction.Return_Value := Debit_Return; + -- one, and only one, message should pass through + Message_Count := Message_Count + 1; + Transaction.TC_Message_Count := Message_Count; + end Input; + or + terminate; + end select; + end loop; + exception + when others => + Report.Failed ("Unexpected exception in Debit_Computation"); + end Debit_Computation; + + +begin + Report.Test ("C954021", "Requeue from one entry body to an entry in" & + " another protected object"); + + Line_Driver.Start; -- Start the test + + + -- Ensure that the message tasks have completed before reporting result + while (TC_Tasks_Completed.Count < TC_Credit_Messages_Expected) + and not TC_Debit_Message_Complete.Value loop + delay ImpDef.Minimum_Task_Switch; + end loop; + + Report.Result; + +end C954021; |