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-- C97307A.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 TIMED ENTRY CALL THAT IS CANCELED (BECAUSE THE DELAY HAS
-- EXPIRED) IS REMOVED FROM THE QUEUE OF THE CALLED TASK'S ENTRY.
-- WRG 7/14/86
with Impdef;
WITH REPORT; USE REPORT;
PROCEDURE C97307A IS
BEGIN
TEST ("C97307A", "CHECK THAT A TIMED ENTRY CALL THAT IS " &
"CANCELED (BECAUSE THE DELAY HAS EXPIRED) IS " &
"REMOVED FROM THE QUEUE OF THE CALLED TASK'S " &
"ENTRY");
DECLARE
DELAY_TIME : CONSTANT DURATION := 2 * 60.0 * Impdef.One_Second;
TASK EXPIRED IS
ENTRY INCREMENT;
ENTRY READ (COUNT : OUT NATURAL);
END EXPIRED;
TASK TYPE NON_TIMED_CALLER IS
ENTRY NAME (N : NATURAL);
END NON_TIMED_CALLER;
TASK TYPE TIMED_CALLER IS
ENTRY NAME (N : NATURAL);
END TIMED_CALLER;
CALLER1 : TIMED_CALLER;
CALLER2 : NON_TIMED_CALLER;
CALLER3 : TIMED_CALLER;
CALLER4 : NON_TIMED_CALLER;
CALLER5 : TIMED_CALLER;
TASK T IS
ENTRY E (NAME : NATURAL);
END T;
TASK DISPATCH IS
ENTRY READY;
END DISPATCH;
--------------------------------------------------
TASK BODY EXPIRED IS
EXPIRED_CALLS : NATURAL := 0;
BEGIN
LOOP
SELECT
ACCEPT INCREMENT DO
EXPIRED_CALLS := EXPIRED_CALLS + 1;
END INCREMENT;
OR
ACCEPT READ (COUNT : OUT NATURAL) DO
COUNT := EXPIRED_CALLS;
END READ;
OR
TERMINATE;
END SELECT;
END LOOP;
END EXPIRED;
--------------------------------------------------
TASK BODY NON_TIMED_CALLER IS
MY_NAME : NATURAL;
BEGIN
ACCEPT NAME (N : NATURAL) DO
MY_NAME := N;
END NAME;
T.E (MY_NAME);
END NON_TIMED_CALLER;
--------------------------------------------------
TASK BODY TIMED_CALLER IS
MY_NAME : NATURAL;
BEGIN
ACCEPT NAME (N : NATURAL) DO
MY_NAME := N;
END NAME;
SELECT
T.E (MY_NAME);
FAILED ("TIMED ENTRY CALL NOT CANCELED FOR CALLER" &
NATURAL'IMAGE(MY_NAME));
OR
DELAY DELAY_TIME;
EXPIRED.INCREMENT;
END SELECT;
EXCEPTION
WHEN OTHERS =>
FAILED ("EXCEPTION RAISED IN TIMED_CALLER -- " &
"CALLER" & NATURAL'IMAGE(MY_NAME));
END TIMED_CALLER;
--------------------------------------------------
TASK BODY DISPATCH IS
BEGIN
CALLER1.NAME (1);
ACCEPT READY;
CALLER2.NAME (2);
ACCEPT READY;
CALLER3.NAME (3);
ACCEPT READY;
CALLER4.NAME (4);
ACCEPT READY;
CALLER5.NAME (5);
END DISPATCH;
--------------------------------------------------
TASK BODY T IS
DESIRED_QUEUE_LENGTH : NATURAL := 1;
EXPIRED_CALLS : NATURAL;
ACCEPTED : ARRAY (1..5) OF NATURAL RANGE 0..5
:= (OTHERS => 0);
ACCEPTED_INDEX : NATURAL := 0;
BEGIN
LOOP
LOOP
EXPIRED.READ (EXPIRED_CALLS);
EXIT WHEN E'COUNT >= DESIRED_QUEUE_LENGTH -
EXPIRED_CALLS;
DELAY 2.0 * Impdef.One_Long_Second;
END LOOP;
EXIT WHEN DESIRED_QUEUE_LENGTH = 5;
DISPATCH.READY;
DESIRED_QUEUE_LENGTH := DESIRED_QUEUE_LENGTH + 1;
END LOOP;
-- AT THIS POINT, FIVE TASKS WERE QUEUED.
-- LET THE TIMED ENTRY CALLS ISSUED BY CALLER1,
-- CALLER3, AND CALLER5 EXPIRE:
DELAY DELAY_TIME + 10.0 * Impdef.One_Long_Second;
-- AT THIS POINT, ALL THE TIMED ENTRY CALLS MUST HAVE
-- EXPIRED AND BEEN REMOVED FROM THE ENTRY QUEUE FOR E,
-- OTHERWISE THE IMPLEMENTATION HAS FAILED THIS TEST.
WHILE E'COUNT > 0 LOOP
ACCEPT E (NAME : NATURAL) DO
ACCEPTED_INDEX := ACCEPTED_INDEX + 1;
ACCEPTED (ACCEPTED_INDEX) := NAME;
END E;
END LOOP;
IF ACCEPTED /= (2, 4, 0, 0, 0) THEN
FAILED ("SOME TIMED CALLS NOT REMOVED FROM ENTRY " &
"QUEUE");
COMMENT ("ORDER ACCEPTED WAS:" &
NATURAL'IMAGE (ACCEPTED (1)) & ',' &
NATURAL'IMAGE (ACCEPTED (2)) & ',' &
NATURAL'IMAGE (ACCEPTED (3)) & ',' &
NATURAL'IMAGE (ACCEPTED (4)) & ',' &
NATURAL'IMAGE (ACCEPTED (5)) );
END IF;
END T;
--------------------------------------------------
BEGIN
NULL;
END;
RESULT;
END C97307A;
|
