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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 ;