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-- C95040D.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 TASKING_ERROR IS RAISED IN A CALLING
-- TASK WHEN THE TASK OWNING THE ENTRY TERMINATES BEFORE RENDEZVOUS
-- CAN OCCUR.
-- CHECK THAT RE-RAISING TASKING_ERROR, ONCE TRAPPED IN THE CALLER,
-- DOES NOT PROPAGATE OUTSIDE THE TASK BODY.
-- GOM 11/29/84
-- JWC 05/14/85
-- PWB 02/11/86 CORRECTED CALL TO TEST TO SHOW CORRECT TEST NAME.
-- RLB 12/15/99 REMOVED POTENTIALLY ERRONEOUS CALLS TO REPORT.COMMENT.
WITH REPORT;
USE REPORT;
PROCEDURE C95040D IS
PROCEDURE DRIVER IS
TASK NEST IS
ENTRY OUTER;
ENTRY INNER;
END NEST;
TASK SLAVE;
TASK BODY NEST IS
BEGIN
--COMMENT("AT TOP OF 'NEST' TASK WAITING ON 'OUTER' " &
-- "RENDEZVOUS");
ACCEPT OUTER DO
--COMMENT("IN 'OUTER' RENDEZVOUS OF 'NEST' TASK " &
-- "ABOUT TO 'RETURN'");
RETURN; -- CAUSES 'INNER' RENDEZVOUS TO BE SKIPPED.
ACCEPT INNER DO
FAILED("'INNER' RENDEZVOUS OF 'NEST' TASK " &
"SHOULD NEVER BE PERFORMED");
END INNER;
END OUTER;
--COMMENT("'OUTER' RENDEZVOUS COMPLETED IN 'NEST' TASK " &
-- "AND NOW TERMINATING");
END NEST;
TASK BODY SLAVE IS
BEGIN
--COMMENT("AT TOP OF 'SLAVE' TASK. CALLING 'INNER' " &
-- "RENDEZVOUS");
NEST.INNER;
FAILED("SHOULD HAVE RAISED 'TASKING_ERROR' IN 'SLAVE' " &
"TASK");
EXCEPTION
WHEN TASKING_ERROR =>
--COMMENT("'SLAVE' TASK CORRECTLY TRAPPING " &
-- "'TASKING_ERROR' AND RE-RAISING IT (BUT " &
-- "SHOULD NOT BE PROPAGATED)");
RAISE;
END SLAVE;
BEGIN -- START OF DRIVER PROCEDURE.
--COMMENT("AT TOP OF 'DRIVER'. CALLING 'OUTER' ENTRY OF " &
-- "'NEST' TASK");
NEST.OUTER;
--COMMENT("'OUTER' RENDEZVOUS COMPLETED. 'DRIVER' AWAITING " &
-- "TERMINATION OF 'NEST' AND 'SLAVE' TASKS");
EXCEPTION
WHEN TASKING_ERROR =>
FAILED("'TASKING_ERROR' CAUGHT IN 'DRIVER' WHEN IT " &
"SHOULD HAVE BEEN CAUGHT IN 'SLAVE' TASK, OR " &
"'TASKING_ERROR' WAS INCORRECTLY PROPAGATED BY " &
"'SLAVE' TASK");
END DRIVER;
BEGIN -- START OF MAIN PROGRAM.
TEST("C95040D","CHECK THAT 'TASKING_ERROR' IS RAISED IN A " &
"CALLER TASK WHEN TASK OWNING THE ENTRY CANNOT " &
"PERFORM RENDEZVOUS. ALSO CHECK THAT " &
"'TASKING_ERROR', ONCE RAISED, IS NOT PROPAGATED " &
"OUTSIDE THE TASK BODY");
--COMMENT("MAIN PROGRAM CALLING 'DRIVER' PROCEDURE");
DRIVER;
--COMMENT("MAIN PROGRAM NOW TERMINATING");
RESULT;
END C95040D;
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