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-- C97112A.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.

--*

-- CHECK THAT A DELAY STATEMENT IS ALLOWED IN THE SEQUENCE OF STATEMENTS

-- OF A SELECT ALTERNATIVE OF A SELECTIVE WAIT CONTAINING A TERMINATE

-- ALTERNATIVE OR AN ELSE PART.

-- WRG 7/9/86

with Impdef;

WITH REPORT;   USE REPORT;

WITH CALENDAR; USE CALENDAR;

PROCEDURE C97112A IS

     ACCEPT_ALTERNATIVE_TAKEN : BOOLEAN := FALSE;

BEGIN

     TEST ("C97112A", "CHECK THAT A DELAY STATEMENT IS ALLOWED IN " &

                      "THE SEQUENCE OF STATEMENTS OF A SELECT " &

                      "ALTERNATIVE OF A SELECTIVE WAIT CONTAINING A " &

                      "TERMINATE ALTERNATIVE OR AN ELSE PART");

     --------------------------------------------------

  A: DECLARE

          TASK T IS

               ENTRY E;

          END T;

          TASK BODY T IS

               BEFORE, AFTER : TIME;

          BEGIN

               SELECT

                    ACCEPT E;

                    ACCEPT_ALTERNATIVE_TAKEN := TRUE;

                    BEFORE := CLOCK;

                    DELAY 10.0 * Impdef.One_Second;

                    AFTER  := CLOCK;

                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN

                         FAILED ("INSUFFICIENT DELAY (A)");

                    END IF;

               OR

                    TERMINATE;

               END SELECT;

          END T;

     BEGIN

          T.E;

     END A;

     IF NOT ACCEPT_ALTERNATIVE_TAKEN THEN

          FAILED ("ACCEPT ALTERNATIVE NOT TAKEN");

     END IF;

     --------------------------------------------------

  B: DECLARE

          TASK T IS

               ENTRY E;

          END T;

          TASK BODY T IS

               BEFORE, AFTER : TIME;

          BEGIN

               --ENSURE THAT E HAS BEEN CALLED BEFORE PROCEEDING:

               WHILE E'COUNT = 0 LOOP

                    DELAY 1.0 * Impdef.One_Second;

               END LOOP;

               SELECT

                    ACCEPT E;

                    BEFORE := CLOCK;

                    DELAY 10.0 * Impdef.One_Second;

                    AFTER  := CLOCK;

                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN

                         FAILED ("INSUFFICIENT DELAY (B-1)");

                    END IF;

               ELSE

                    FAILED ("ELSE PART EXECUTED (B-1)");

               END SELECT;

               SELECT

                    ACCEPT E;

                    FAILED ("ACCEPT STATEMENT EXECUTED (B-2)");

               ELSE

                    BEFORE := CLOCK;

                    DELAY 10.0 * Impdef.One_Second;

                    AFTER  := CLOCK;

                    IF AFTER - BEFORE < 10.0 * Impdef.One_Second THEN

                         FAILED ("INSUFFICIENT DELAY (B-2)");

                    END IF;

               END SELECT;

          EXCEPTION

               WHEN OTHERS =>

                    FAILED ("EXCEPTION RAISED");

          END T;

     BEGIN

          T.E;

     END B;

     --------------------------------------------------

     RESULT;

END C97112A;