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-- C97201E.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  E:  THE BODY OF THE TASK CONTAINING THE CALLED ENTRY

--     DOES NOT CONTAIN AN ACCEPT_STATEMENT FOR THAT ENTRY  -

--     AND THIS FACT CAN NOT BE DETERMINED STATICALLY.

--     (THE ENTRY BELONGS TO AN ENTRY FAMILY; SOME FAMILY MEMBERS

--     ARE "ACCEPTABLE", BUT NOT THE CALLED ONE.)

-- RM 4/13/82

WITH REPORT; USE REPORT;

PROCEDURE C97201E IS

     ELSE_BRANCH_TAKEN    :  BOOLEAN  :=  FALSE ;

BEGIN

     TEST ("C97201E", "CHECK THAT NO RENDEZVOUS REQUESTED BY"      &

                      " A CONDITIONAL_ENTRY_CALL CAN EVER OCCUR"   &

                      " IN THE ABSENCE OF A CORRESPONDING "        &

                      " ACCEPT_STATEMENT "                         );

     DECLARE

          SUBTYPE  SHORT  IS  INTEGER RANGE 10..20 ;

          KEEP_ALIVE  :  INTEGER  := 15 ;

          TASK  T  IS

               ENTRY  DO_IT_NOW_ORELSE ( SHORT ) ;

          END  T ;

          TASK BODY  T  IS

          BEGIN

               -- NO ACCEPT_STATEMENT FOR THE ENTRY_CALL BEING TESTED

               ACCEPT  DO_IT_NOW_ORELSE ( IDENT_INT(15) );

                                     -- THIS ALSO PREVENTS THIS SERVER

                                     --     TASK FROM TERMINATING IF

                                     --     UPON ACTIVATION

                                     --     IT GETS TO RUN    

                                     --     AHEAD OF THE CALLER (WHICH

                                     --     WOULD LEAD TO A SUBSEQUENT

                                     --     TASKING_ERROR AT THE TIME OF

                                     --     THE NO-WAIT CALL).

          END ;

     BEGIN

          SELECT

               T.DO_IT_NOW_ORELSE (10) ;  -- ACCEPT_STATEMENT HAS  15

          ELSE              -- (I.E. CALLER ADOPTS A NO-WAIT POLICY)

                            --      THEREFORE THIS BRANCH MUST BE CHOSEN

               ELSE_BRANCH_TAKEN := TRUE ;

               COMMENT( "ELSE_BRANCH  TAKEN" );

          END SELECT;

          T.DO_IT_NOW_ORELSE(KEEP_ALIVE) ;-- THIS ALSO UPDATES NONLOCALS

     END;   -- END OF BLOCK CONTAINING THE ENTRY CALL

     -- BY NOW, THE TASK IS TERMINATED

     IF  ELSE_BRANCH_TAKEN  THEN

          NULL ;

     ELSE

          FAILED( "RENDEZVOUS ATTEMPTED?" );

     END IF;

     RESULT;

END  C97201E ;