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-- C96001A.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 A DELAY STATEMENT DELAYS EXECUTION FOR AT LEAST THE

--      SPECIFIED TIME. SPECIFICALLY,

--        (A) POSITIVE DELAY ARGUMENT.

--        (B) NEGATIVE DELAY ARGUMENT.

--        (C) ZERO DELAY ARGUMENT.

--        (D) DURATION'SMALL DELAY ARGUMENT.

--        (E) EXPRESSION OF TYPE DURATION AS DELAY ARGUMENT.

-- HISTORY:

--     CPP  8/14/84  CREATED ORIGINAL TEST.

--     RJW 11/13/87  ADDED CODE WHICH ALLOWS TEST TO REPORT "PASSED"

--                   IF TICK > DURATION'SMALL.

with Impdef;

WITH CALENDAR;  USE CALENDAR;

WITH SYSTEM;    USE SYSTEM;

WITH REPORT;    USE REPORT;

PROCEDURE C96001A IS

     SUBTYPE INT IS INTEGER RANGE 0 .. 20_000;

BEGIN

     TEST ("C96001A", "CHECK THAT DELAY STATEMENT DELAYS " &

           "EXECUTION FOR AT LEAST THE SPECIFIED TIME");

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

     DECLARE   -- (A)

          X : DURATION := 5.0 * Impdef.One_Second;

          OLD_TIME : TIME;

          LAPSE : DURATION;

     BEGIN     -- (A)

          LOOP

               OLD_TIME := CLOCK;

               DELAY X;

               LAPSE := CLOCK - OLD_TIME;

               EXIT;

          END LOOP;

          IF LAPSE < X THEN

               FAILED ("DELAY DID NOT LAPSE AT LEAST 5.0 " &

                       "SECONDS - (A)");

          END IF;

     EXCEPTION

          WHEN OTHERS =>

               FAILED ("EXCEPTION RAISED - (A)");

     END;

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

     DECLARE   -- (B)

          OLD_TIME : TIME;

          LAPSE : DURATION;

     BEGIN     -- (B)

          LOOP

               OLD_TIME := CLOCK;

               DELAY -5.0;

               LAPSE := CLOCK - OLD_TIME;

               EXIT;

          END LOOP;

          COMMENT ("(B) - NEGATIVE DELAY LAPSED FOR " &

                   INT'IMAGE (INT (LAPSE * 1_000)) & " MILLISECONDS");

     EXCEPTION

          WHEN OTHERS =>

               FAILED ("EXCEPTION RAISED - (B)");

     END;

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

     DECLARE   -- (C)

          X : DURATION := 0.0;

          OLD_TIME : TIME;

          LAPSE : DURATION;

     BEGIN     -- (C)

          LOOP

               OLD_TIME := CLOCK;

               DELAY X;

               LAPSE := CLOCK - OLD_TIME;

               EXIT;

          END LOOP;

          COMMENT ("(C) - ZERO DELAY LAPSED FOR " &

                   INT'IMAGE (INT (LAPSE * 1_000)) & " MILLISECONDS");

     EXCEPTION

          WHEN OTHERS =>

               FAILED ("EXCEPTION RAISED - (C)");

     END;

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

     DECLARE   -- (D)

          X : DURATION := DURATION'SMALL;

          OLD_TIME : TIME;

          LAPSE : DURATION;

     BEGIN     -- (D)

          LOOP

               OLD_TIME := CLOCK;

               DELAY X;

               LAPSE := CLOCK - OLD_TIME;

               EXIT;

          END LOOP;

          IF LAPSE < X THEN

               IF TICK < DURATION'SMALL THEN

                    FAILED ("DELAY DID NOT LAPSE AT LEAST " &

                            "DURATION'SMALL SECONDS - (D)");

               ELSE

                    COMMENT ("TICK > DURATION'SMALL SO DELAY IN " &

                             "'(D)' IS NOT MEASURABLE");

               END IF;

          END IF;

     EXCEPTION

          WHEN OTHERS =>

               FAILED ("EXCEPTION RAISED - (D)");

     END;

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

     DECLARE   -- (E)

          INC1 : DURATION := 2.0 * Impdef.One_Second;

          INC2 : DURATION := 3.0 * Impdef.One_Second;

          OLD_TIME : TIME;

          LAPSE : DURATION;

     BEGIN     -- (E)

          LOOP

               OLD_TIME := CLOCK;

               DELAY INC1 + INC2;

               LAPSE := CLOCK - OLD_TIME;

               EXIT;

          END LOOP;

          IF LAPSE < (INC1 + INC2) THEN

               FAILED ("DELAY DID NOT LAPSE AT LEAST " &

                       "INC1 + INC2 SECONDS - (E)");

          END IF;

     EXCEPTION

          WHEN OTHERS =>

               FAILED ("EXCEPTION RAISED - (E)");

     END;

     RESULT;

END C96001A;