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-- C97201A.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 RENDEZVOUS REQUESTED BY A CONDITIONAL_ENTRY_CALL
-- IS PERFORMED ONLY IF IMMEDIATELY POSSIBLE.
-- CASE A: THE TASK TO BE CALLED IS NOT YET ACTIVE AS OF THE
-- MOMENT OF CALL (CONDITIONAL_ENTRY_CALL),
-- AND THIS FACT CAN BE DETERMINED STATICALLY.
-- RM 4/20/82
WITH REPORT; USE REPORT;
PROCEDURE C97201A IS
ELSE_BRANCH_TAKEN : INTEGER := 3 ;
BEGIN
TEST ("C97201A", "CHECK THAT NO RENDEZVOUS REQUESTED BY" &
" A CONDITIONAL_ENTRY_CALL CAN OCCUR WHILE" &
" THE CALLED TASK IS NOT YET ACTIVE" );
-------------------------------------------------------------------
DECLARE
TASK T IS
ENTRY DO_IT_NOW_ORELSE ( AUTHORIZED : IN BOOLEAN ) ;
END T ;
TASK BODY T IS
PACKAGE SECOND_ATTEMPT IS END SECOND_ATTEMPT ;
PACKAGE BODY SECOND_ATTEMPT IS
BEGIN
SELECT
DO_IT_NOW_ORELSE (FALSE) ;--CALLING (OWN) ENTRY
ELSE -- (I.E. CALLER ADOPTS A NO-WAIT POLICY)
-- THEREFORE THIS BRANCH MUST BE CHOSEN
ELSE_BRANCH_TAKEN := 2 * ELSE_BRANCH_TAKEN ;
COMMENT( "ELSE_BRANCH TAKEN (#2)" );
END SELECT;
END SECOND_ATTEMPT ;
BEGIN
ACCEPT DO_IT_NOW_ORELSE ( AUTHORIZED : IN BOOLEAN ) DO
IF AUTHORIZED THEN
COMMENT( "AUTHORIZED ENTRY_CALL" );
ELSE
FAILED( "UNAUTHORIZED ENTRY_CALL" );
END IF;
END DO_IT_NOW_ORELSE ;
END T ;
PACKAGE FIRST_ATTEMPT IS END FIRST_ATTEMPT ;
PACKAGE BODY FIRST_ATTEMPT IS
BEGIN
SELECT
T.DO_IT_NOW_ORELSE (FALSE) ;
ELSE -- (I.E. CALLER ADOPTS A NO-WAIT POLICY)
-- THEREFORE THIS BRANCH MUST BE CHOSEN
ELSE_BRANCH_TAKEN := 1 + ELSE_BRANCH_TAKEN ;
COMMENT( "ELSE_BRANCH TAKEN (#1)" );
END SELECT;
END FIRST_ATTEMPT ;
BEGIN
T.DO_IT_NOW_ORELSE ( TRUE ); -- TO SATISFY THE SERVER'S
-- WAIT FOR SUCH A CALL
EXCEPTION
WHEN TASKING_ERROR =>
FAILED( "TASKING ERROR" );
END ;
-------------------------------------------------------------------
-- BY NOW, THE TASK IS TERMINATED (AND THE NONLOCALS UPDATED)
CASE ELSE_BRANCH_TAKEN IS
WHEN 3 =>
FAILED( "NO 'ELSE'; BOTH (?) RENDEZVOUS ATTEMPTED?" );
WHEN 4 =>
FAILED( "'ELSE' #1 ONLY; RENDEZVOUS (#2) ATTEMPTED?" );
WHEN 6 =>
FAILED( "'ELSE' #2 ONLY; RENDEZVOUS (#1) ATTEMPTED?" );
WHEN 7 =>
FAILED( "WRONG ORDER FOR 'ELSE': #2,#1 " );
WHEN 8 =>
NULL ;
WHEN OTHERS =>
FAILED( "WRONG CASE_VALUE" );
END CASE;
RESULT;
END C97201A ;
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