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-- C97116A.ADA

--                             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 GUARD CONDITIONS IN A SELECTIVE WAIT STATEMENT

--     ARE NOT RE-EVALUATED DURING THE WAIT.

-- HISTORY:

--     WRG 7/10/86  CREATED ORIGINAL TEST.

--     RJW 5/15/90  REMOVED SHARED VARIABLES.

with Impdef;

WITH REPORT; USE REPORT;

PROCEDURE C97116A IS

     GUARD_EVALUATIONS : NATURAL := 0;

     FUNCTION GUARD RETURN BOOLEAN IS

     BEGIN

          GUARD_EVALUATIONS := GUARD_EVALUATIONS + 1;

          RETURN FALSE;

     END GUARD;

     FUNCTION SO_LONG RETURN DURATION IS

     BEGIN

          RETURN 20.0;

     END SO_LONG;

BEGIN

     TEST ("C97116A", "CHECK THAT THE GUARD CONDITIONS IN A " &

                      "SELECTIVE WAIT STATEMENT ARE NOT RE-EVALUATED " &

                      "DURING THE WAIT");

     DECLARE

          TASK T IS

               ENTRY E;

          END T;

          TASK BODY T IS

          BEGIN

               SELECT

                    ACCEPT E;

                    FAILED ("ACCEPTED NONEXISTENT CALL TO E");

               OR WHEN GUARD     =>

                    DELAY 0.0;

                    FAILED ("EXECUTED ALTERNATIVE CLOSED BY FALSE " &

                            "GUARD FUNCTION" );

               OR

                    DELAY SO_LONG * Impdef.One_Second;

               END SELECT;

          EXCEPTION

               WHEN OTHERS =>

                    FAILED ("EXCEPTION RAISED");

          END T;

          TASK GET_CPU;

          TASK BODY GET_CPU IS

          BEGIN

               WHILE NOT T'TERMINATED LOOP

                    DELAY 1.0 * Impdef.One_Second;

               END LOOP;

          END GET_CPU;

     BEGIN

          NULL;

     END;

     IF GUARD_EVALUATIONS /= 1 THEN

          FAILED ("GUARD EVALUATED" &

                  NATURAL'IMAGE(GUARD_EVALUATIONS) & " TIMES");

     END IF;

     RESULT;

END C97116A;