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+-- C97120B.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 IF A SPECIFIED DELAY IS ZERO OR NEGATIVE AND AN ENTRY CALL
+-- IS WAITING AT AN OPEN ALTERNATIVE WHEN THE SELECTIVE WAIT IS
+-- EXECUTED, THE CALL IS ACCEPTED.
+
+-- WRG 7/11/86
+
+with Impdef;
+WITH REPORT; USE REPORT;
+PROCEDURE C97120B IS
+
+ ZERO, NEG : DURATION := 1.0;
+
+BEGIN
+
+ TEST ("C97120B", "CHECK THAT IF A SPECIFIED DELAY IS ZERO OR " &
+ "NEGATIVE AND AN ENTRY CALL IS WAITING AT AN " &
+ "OPEN ALTERNATIVE WHEN THE SELECTIVE WAIT IS " &
+ "EXECUTED, THE CALL IS ACCEPTED");
+
+ IF EQUAL (3, 3) THEN
+ ZERO := 0.0;
+ NEG := -1.0;
+ END IF;
+
+ DECLARE
+
+ TASK T IS
+ ENTRY E;
+ END T;
+
+ TASK BODY T IS
+ BEGIN
+ WHILE E'COUNT = 0 LOOP
+ DELAY 1.0 * Impdef.One_Second;
+ END LOOP;
+
+ A: BEGIN
+ SELECT
+ WHEN IDENT_BOOL (TRUE) =>
+ ACCEPT E;
+ OR
+ DELAY ZERO * Impdef.One_Second;
+ FAILED ("ZERO DELAY ALTERNATIVE TAKEN");
+ ACCEPT E;
+ END SELECT;
+ EXCEPTION
+ WHEN OTHERS =>
+ FAILED ("EXCEPTION RAISED (A)");
+ END A;
+
+ WHILE E'COUNT = 0 LOOP
+ DELAY 1.0 * Impdef.One_Second;
+ END LOOP;
+
+ B: BEGIN
+ SELECT
+ ACCEPT E;
+ OR
+ DELAY NEG;
+ FAILED ("NEGATIVE DELAY ALTERNATIVE TAKEN");
+ ACCEPT E;
+ END SELECT;
+ EXCEPTION
+ WHEN OTHERS =>
+ FAILED ("EXCEPTION RAISED (B)");
+ END B;
+
+ END T;
+
+ BEGIN
+
+ T.E;
+ T.E;
+
+ END;
+
+ RESULT;
+
+END C97120B;