c954023.a

来自「用于进行gcc测试」· A 代码 · 共 559 行 · 第 1/2 页

         Current_ID       : integer := 1;
         Current_Priority : App_Priority := High;      
   
         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
         
         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_PO.First_Message_Has_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: Cycle generation of  high medium and low priority 
                  -- transactions
                  if Current_Priority = High then
                     Current_Priority := Medium;
                  elsif  
                     Current_Priority = Medium 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_Distrib                 then
               Report.Failed ("Expected path not traversed - Credit");
            end if;
            TC_PO.Increment_Tasks_Completed_Count;
         else
            if This_Transaction.Return_Value  /= Debit_Return or   
               This_Transaction.TC_Message_Count /= 1         or
               not This_Transaction.TC_thru_Distrib           then
                  Report.Failed ("Expected path not traversed - Debit");
            end if;
            TC_Debit_Message_Complete := 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
                  
                  -- Perform the computations required for this transaction
                  null; -- stub
   
                  
                  -- The following is all Test Control code:
                 
                  if not Transaction.TC_thru_Distrib 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;
   
                  -- This is checked by the Message_Task:
                  Transaction.Return_Value := Credit_Return;
   
                  -- Now take special action depending on which Message.
                  -- Note: The count gives the order in which the messages are
                  --       arriving at this task NOT the order in which they
                  --       were originally generated and sent out.
   
                  Message_Count := Message_Count + 1;
   
                  if Message_Count < 4 then 
                     -- This is one of the first three messages which must 
                     -- be High priority because we will set "Overload" after 
                     -- the first, which is known to be High. The lower
                     -- priority should be waiting on the queues
                     if Transaction.Priority /= High then  
                     Report.Failed 
                        ("Credit Task: Lower priority trans. during overload");
                     end if;
                     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_PO.Set_First_Message_Has_Arrived;
                     elsif
                        Message_Count = 3 then
                        -- The two high priority transactions created 
                        -- subsequent to the overload have now been processed,
                        --  release the Medium priority items
                        Distributor.Clear_Overload_to_Medium; 
                     end if;
                  elsif Message_Count < 6 then
                     -- This must be one of the Medium priority messages
                     if Transaction.Priority /= Medium then  
                     Report.Failed 
                           ("Credit Task: Second group not Medium Priority");
                     end if;
                     if Message_Count = 5 then 
                        -- The two medium priority transactions
                        -- have now been processed - release the
                        -- Low priority items
                        Distributor.Clear_Overload_to_Low; 
                     end if;
                  elsif Message_Count < TC_Trans_Range'Last then
                     -- This must be one of the Low priority messages
                     if Transaction.Priority /= Low then  
                     Report.Failed 
                           ("Credit Task: Third group not Low Priority");
                     end if;
                  else
                     -- Too many transactions have arrived.  Duplicates?
                     -- the Debit transaction?
                     Report.Failed 
                           ("Credit Task: Too many transactions");
                  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_Distrib 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 -- declare 

      null;

   end; -- declare (test encapsulation)

   if (TC_PO.Tasks_Completed_Count /= TC_Credit_Messages_Expected) 
                                    and not TC_Debit_Message_Complete then
      Report.Failed ("Incorrect number of Message Tasks completed");
   end if;

   Report.Result;

end C954023;