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1 149 jeremybenn
-- C97201D.ADA
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
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--     this public release, the Government intends to confer upon all 
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--     recipients unlimited rights  equal to those held by the Government.  
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--     These rights include rights to use, duplicate, release or disclose the 
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--     released technical data and computer software in whole or in part, in 
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--     any manner and for any purpose whatsoever, and to have or permit others 
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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-- CHECK THAT A RENDEZVOUS REQUESTED BY A CONDITIONAL_ENTRY_CALL
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--     IS PERFORMED ONLY IF IMMEDIATELY POSSIBLE.
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-- CASE  D:  THE BODY OF THE TASK CONTAINING THE CALLED ENTRY
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--     DOES NOT CONTAIN AN ACCEPT_STATEMENT FOR THAT ENTRY  -
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--     AND THIS FACT IS DETERMINED STATICALLY.
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-- RM 4/12/82
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WITH REPORT; USE REPORT;
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PROCEDURE C97201D IS
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     ELSE_BRANCH_TAKEN    :  BOOLEAN  :=  FALSE ;
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BEGIN
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     TEST ("C97201D", "CHECK THAT NO RENDEZVOUS REQUESTED BY"      &
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                      " A CONDITIONAL_ENTRY_CALL CAN EVER OCCUR"   &
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                      " IN THE ABSENCE OF A CORRESPONDING "        &
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                      " ACCEPT_STATEMENT "                         );
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     DECLARE
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          TASK  T  IS
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               ENTRY  DO_IT_NOW_ORELSE ;
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               ENTRY  KEEP_ALIVE ;
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          END  T ;
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          TASK BODY  T  IS
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          BEGIN
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               -- NO ACCEPT_STATEMENT FOR THE ENTRY_CALL BEING TESTED
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               ACCEPT  KEEP_ALIVE ;  -- TO PREVENT THIS SERVER TASK FROM
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                                     --     TERMINATING IF
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                                     --     UPON ACTIVATION
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                                     --     IT GETS TO RUN    
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                                     --     AHEAD OF THE CALLER (WHICH
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                                     --     WOULD LEAD TO A SUBSEQUENT
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                                     --     TASKING_ERROR AT THE TIME OF
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                                     --     THE NO-WAIT CALL).
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          END ;
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     BEGIN
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          SELECT
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               T.DO_IT_NOW_ORELSE ;
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          ELSE              -- (I.E. CALLER ADOPTS A NO-WAIT POLICY)
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                            --      THEREFORE THIS BRANCH MUST BE CHOSEN
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               ELSE_BRANCH_TAKEN := TRUE ;
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               COMMENT( "ELSE_BRANCH  TAKEN" );
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          END SELECT;
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          T.KEEP_ALIVE ;    -- THIS ALSO UPDATES THE NONLOCALS
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     END;   -- END OF BLOCK CONTAINING THE ENTRY CALL
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     -- BY NOW, THE TASK IS TERMINATED
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     IF  ELSE_BRANCH_TAKEN  THEN
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          NULL ;
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     ELSE
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          FAILED( "RENDEZVOUS ATTEMPTED?" );
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     END IF;
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     RESULT;
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END  C97201D ;

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