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1 -- C940006.A
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2 --
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 --
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26 -- OBJECTIVE:
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27 -- Check that the body of a protected function can have external calls
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28 -- to other protected functions and that the body of a protected
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29 -- procedure can have external calls to protected procedures and to
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30 -- protected functions.
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31 --
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32 -- TEST DESCRIPTION:
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33 -- Use a subset of the simulation of the freeway on-ramp described in
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34 -- c940005. In this case two protected objects are used but only a
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35 -- minimum of routines are shown in each. Both objects are hard coded
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36 -- and detail two adjacent on-ramps (Ramp_31 & Ramp_32) with routines in
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37 -- each which use external calls to the other.
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38
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39 --
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40 --
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41 -- CHANGE HISTORY:
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42 -- 06 Dec 94 SAIC ACVC 2.0
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43 --
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44 --!
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45
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46 with Report;
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47
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48 procedure C940006 is
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49
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50 begin
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51
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52 Report.Test ("C940006", "Check external calls of protected functions" &
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53 " and procedures");
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54
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55 declare -- encapsulate the test
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56
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57 -- Weighted load given to each potential problem area and accumulated
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58 type Load_Factor is range 0..8;
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59 --
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60 Clear_Level : constant Load_Factor := 0;
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61 Minimum_Level : constant Load_Factor := 1;
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62 Moderate_Level : constant Load_Factor := 3;
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63 Serious_Level : constant Load_Factor := 4;
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64 Critical_Level : constant Load_Factor := 6;
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65
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66 --================================================================
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67 -- Only the Routines that are used in this test are shown
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68 --
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69 protected Ramp_31 is
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70
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71 function Local_Overload return Load_Factor;
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72 procedure Set_Local_Overload(Sensor_Level : Load_Factor);
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73 procedure Notify;
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74 function Next_Ramp_Overload return Load_Factor;
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75 function Freeway_Overload return Load_Factor;
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76 procedure Downstream_Ramps;
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77 function Get_DSR_Accumulate return Load_Factor;
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78
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79 private
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80 Next_Ramp_Alert : Boolean := false; -- Next Ramp is in trouble?
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81
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82 -- Current state of the various Sample Points
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83 Local_State : Load_Factor := Clear_Level;
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84 -- Accumulated load for next three downstream ramps
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85 DSR_Accumulate : Load_Factor := Clear_Level;
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86
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87 end Ramp_31;
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88 --================================================================
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89 -- Only the Routines that are used in this test are shown
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90 --
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91 protected Ramp_32 is
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92
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93 function Local_Overload return Load_Factor;
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94 procedure Set_Local_Overload (Sensor_Level : Load_Factor);
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95
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96 private
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97
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98 Local_State : Load_Factor := Clear_Level;
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99
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100 end Ramp_32;
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101 --================================================================
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102 protected body Ramp_31 is
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103
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104 -- These Set/Clear routines are triggered by real-time sensors that
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105 -- reflect traffic state
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106 procedure Set_Local_Overload (Sensor_Level : Load_Factor) is
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107 begin
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108 -- Notify "previous" ramp to check this one for current state.
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109 -- Subsequent changes in state will not send an alert
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110 null; --::::: (see Ramp_32 for this code)
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111 Local_State := Sensor_Level;
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112 null; --::::: Start local meter if not already started
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113 end Set_Local_Overload;
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114
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115 function Local_Overload return Load_Factor is
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116 begin
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117 return Local_State;
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118 end Local_Overload;
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119
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120 -- This is notification from the next ramp that it is in
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121 -- overload. With this provision we only need to sample the next
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122 -- ramp during adverse conditions.
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123 procedure Notify is
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124 begin
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125 Next_Ramp_Alert := true;
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126 end Notify;
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127
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128 function Next_Ramp_Overload return Load_Factor is
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129 begin
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130 if Next_Ramp_Alert then
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131 -- EXTERNAL FUNCTION CALL FROM FUNCTION
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132 -- Get next ramp's current state
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133 return Ramp_32.Local_Overload;
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134 else
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135 return Clear_Level;
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136 end if;
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137 end Next_Ramp_Overload;
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138
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139 -- return the summation of all the load factors
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140 function Freeway_Overload return Load_Factor is
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141 begin
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142 return Local_Overload
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143 -- + :::: others
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144 + Next_Ramp_Overload;
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145 end Freeway_Overload;
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146
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147 -- Snapshot the states of the next three downstream ramps
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148 procedure Downstream_Ramps is
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149 begin
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150 DSR_Accumulate := Ramp_32.Local_Overload; -- EXTERNAL FUNCTION
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151 -- :::: + Ramp_33.Local_Overload -- FROM PROCEDURE
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152 -- :::: + Ramp_34.Local_Overload
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153 end Downstream_Ramps;
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154
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155 -- Get last snapshot
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156 function Get_DSR_Accumulate return Load_Factor is
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157 begin
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158 return DSR_Accumulate;
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159 end Get_DSR_Accumulate;
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160
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161 end Ramp_31;
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162 --================================================================
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163 protected body Ramp_32 is
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164
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165 function Local_Overload return Load_Factor is
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166 begin
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167 return Local_State;
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168 end;
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169
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170
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171 -- These Set/Clear routines are triggered by real-time sensors that
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172 -- reflect traffic state
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173 procedure Set_Local_Overload(Sensor_Level : Load_Factor) is
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174 begin
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175 if Local_State = Clear_Level then
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176 -- Notify "previous" ramp to check this one for current state.
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177 -- Subsequent changes in state will not send an alert
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178 -- When the situation clears another routine performs the
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179 -- all_clear notification. (not shown)
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180 -- EXTERNAL CALL OF PROCEDURE FROM PROCEDURE
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181 Ramp_31.Notify;
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182 end if;
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183 Local_State := Sensor_Level;
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184 null; --::::: Start local meter if not already started
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185 end;
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186
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187 end Ramp_32;
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188 --================================================================
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189
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190
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191
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192 begin -- declare
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193
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194 -- Test driver. This is ALL test control code
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195 -- Simulate calls to the protected functions and procedures
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196 -- from without the protected object, these will, in turn make the
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197 -- external calls.
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198
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199 -- Check initial conditions, exercising the simple calls
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200 if not (Ramp_31.Local_Overload = Clear_Level and
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201 Ramp_31.Next_Ramp_Overload = Clear_Level and
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202 Ramp_31.Freeway_Overload = Clear_Level) and
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203 Ramp_32.Local_Overload = Clear_Level then
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204 Report.Failed ("Initial Calls provided unexpected Results");
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205 end if;
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206
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207 -- Simulate real-time sensors reporting overloads at a hardware level
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208 Ramp_31.Set_Local_Overload (1);
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209 Ramp_32.Set_Local_Overload (3);
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210
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211 Ramp_31.Downstream_Ramps; -- take the current snapshot
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212
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213 if not (Ramp_31.Local_Overload = Minimum_Level and
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214 Ramp_31.Get_DSR_Accumulate = Moderate_Level and
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215 Ramp_31.Freeway_Overload = Serious_Level) then
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216 Report.Failed ("Secondary Calls provided unexpected Results");
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217 end if;
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218
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219 end; -- declare
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220
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221 Report.Result;
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222
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223 end C940006;
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