gcc/testsuite/ada/acats/tests/c9/c940012.a

   1 -- C940012.A
   2 --
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   7 --     unlimited rights in the software and documentation contained herein.
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  12 --     released technical data and computer software in whole or in part, in
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  15 --
  16 --                                    DISCLAIMER
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  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 --
  26 -- OBJECTIVE:
  27 --      Check that a protected object can have discriminants
  28 --
  29 -- TEST DESCRIPTION:
  30 --      Use a subset of the simulation of the freeway on-ramp described in
  31 --      c940005.  In this case an array of access types is built with pointers
  32 --      to successive ramps.  Each ramp has its Ramp_Number specified by
  33 --      discriminant and this corresponds to the index in the array.  The test
  34 --      checks that the ramp numbers are assigned as expected then uses calls
  35 --      to  procedures within the objects (ramps) to verify external calls to
  36 --      ensure the structures are valid.  The external references within the
  37 --      protected objects are made via the index into the array.  Routines
  38 --      which refer to the "previous" ramp and the "next" ramp are exercised.
  39 --      (Note: The first and last ramps are assumed to be dummies and no
  40 --      first/last condition code is included)
  41 --
  42 --
  43 -- CHANGE HISTORY:
  44 --      06 Dec 94   SAIC    ACVC 2.0
  45 --
  46 --!
  47
  48
  49 with Report;
  50
  51
  52 procedure C940012 is
  53
  54    type Ramp_Index is range 1..4;
  55
  56    type Ramp;
  57    type a_Ramp is access Ramp;
  58
  59    Ramp_Array : array (Ramp_Index) of a_Ramp;
  60
  61    -- Weighted load given to each potential problem area and accumulated
  62    type Load_Factor is range 0..8;
  63    Clear_Level    : constant Load_Factor := 0;
  64    Moderate_Level : constant Load_Factor := 3;
  65
  66    --================================================================
  67    -- Only the Routines that are used in this test are shown
  68    --
  69    protected type Ramp (Ramp_In : Ramp_Index) is
  70
  71       function Ramp_Number           return Ramp_Index;
  72       function Local_Overload        return Load_Factor;
  73       function Next_Ramp_Overload    return Load_Factor;
  74       procedure Set_Local_Overload(Sensor_Level : Load_Factor);
  75       procedure Notify;
  76
  77    private
  78
  79       Next_Ramp_Alert : Boolean  := false;  -- Next Ramp is in trouble?
  80
  81       -- Current state of the various Sample Points
  82       Local_State     : Load_Factor := Clear_Level;
  83
  84    end Ramp;
  85    --================================================================
  86    protected body Ramp is
  87
  88       function Ramp_Number return Ramp_Index is
  89       begin
  90          return Ramp_In;
  91       end Ramp_Number;
  92
  93       -- These Set/Clear routines are triggered by real-time sensors that
  94       -- reflect traffic state
  95       procedure Set_Local_Overload(Sensor_Level : Load_Factor) is
  96       begin
  97          if Local_State = Clear_Level then
  98             -- Notify "previous" ramp to check this one for current state.
  99             -- Subsequent changes in state will not send an alert
 100             -- When the situation clears another routine performs the
 101             -- all_clear notification. (not shown)
 102             Ramp_Array(Ramp_In - 1).Notify;   -- index to previous ramp
 103          end if;
 104          Local_State := Sensor_Level;
 105          null;   --::::: Start local meter if not already started
 106       end;
 107
 108       function Local_Overload return Load_Factor is
 109       begin
 110          return Local_State;
 111       end Local_Overload;
 112
 113       -- This is notification from the next ramp that it is in
 114       -- overload.  With this provision we only need to sample the next
 115       -- ramp during adverse conditions.
 116       procedure Notify is
 117       begin
 118          Next_Ramp_Alert := true;
 119       end Notify;
 120
 121       function Next_Ramp_Overload return Load_Factor is
 122       begin
 123          if Next_Ramp_Alert then
 124             -- Get next ramp's current state
 125             return Ramp_Array(Ramp_In + 1).Local_Overload;
 126          else
 127             return Clear_Level;
 128          end if;
 129       end Next_Ramp_Overload;
 130    end Ramp;
 131    --================================================================
 132
 133 begin
 134
 135
 136    Report.Test ("C940012", "Check that a protected object " &
 137                         "can have discriminants");
 138
 139    -- Build the ramps and populate the ramp array
 140    for i in Ramp_Index loop
 141       Ramp_Array(i) := new Ramp (i);
 142    end loop;
 143
 144    -- Test driver.  This is ALL test control code
 145
 146    -- Check the assignment of the index
 147    for i in Ramp_Index loop
 148       if Ramp_Array(i).Ramp_Number /= i then
 149          Report.Failed ("Ramp_Number assignment incorrect");
 150       end if;
 151    end loop;
 152
 153    -- Simulate calls to the protected functions and procedures
 154    -- external calls. (do not call the "dummy" end ramps)
 155
 156    -- Simple Call
 157    if Ramp_Array(2).Next_Ramp_Overload /= Clear_level then
 158       Report.Failed ("Primary call incorrect");
 159    end if;
 160
 161    -- Call which results in an external procedure call via the array
 162    -- index from within the protected object
 163    Ramp_Array(3).Set_Local_Overload (Moderate_Level);
 164
 165    -- Call which results in an external function call via the array
 166    -- index from within the protected object
 167    if Ramp_Array(2).Next_Ramp_Overload /= Moderate_level then
 168       Report.Failed ("Secondary call incorrect");
 169    end if;
 170
 171
 172    Report.Result;
 173
 174 end C940012;