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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;