| -- C97201G.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 G: THE CORRESPONDING ACCEPT_STATEMENT IS CLOSED |
| -- AND THIS FACT IS STATICALLY DETERMINABLE. |
| |
| |
| -- RM 4/21/82 |
| |
| |
| WITH REPORT; USE REPORT; |
| PROCEDURE C97201G IS |
| |
| ELSE_BRANCH_TAKEN : BOOLEAN := FALSE ; |
| RENDEZVOUS_OCCURRED : BOOLEAN := FALSE ; |
| QUEUE_NOT_EMPTY : BOOLEAN := FALSE ; |
| X : INTEGER := 17 ; |
| |
| BEGIN |
| |
| |
| TEST ("C97201G", "CHECK THAT NO RENDEZVOUS REQUESTED BY" & |
| " A CONDITIONAL_ENTRY_CALL CAN EVER OCCUR" & |
| " IF THE CORRESPONDING ACCEPT_STATEMENT IS" & |
| " CLOSED" ); |
| |
| |
| ------------------------------------------------------------------- |
| |
| |
| DECLARE |
| |
| |
| TASK T IS |
| ENTRY DO_IT_NOW_ORELSE( DID_YOU_DO_IT : IN OUT BOOLEAN); |
| ENTRY KEEP_ALIVE ; |
| END T ; |
| |
| |
| TASK BODY T IS |
| BEGIN |
| |
| IF DO_IT_NOW_ORELSE'COUNT /= 0 THEN |
| QUEUE_NOT_EMPTY := TRUE ; |
| END IF; |
| |
| |
| SELECT |
| WHEN 3 = 5 => |
| ACCEPT DO_IT_NOW_ORELSE |
| ( DID_YOU_DO_IT : IN OUT BOOLEAN) |
| DO |
| DID_YOU_DO_IT := TRUE ; |
| END; |
| OR |
| ACCEPT KEEP_ALIVE ; -- TO PREVENT SELECT_ERROR |
| END SELECT; |
| |
| |
| IF DO_IT_NOW_ORELSE'COUNT /= 0 THEN |
| QUEUE_NOT_EMPTY := TRUE ; |
| END IF; |
| |
| |
| END T ; |
| |
| |
| BEGIN |
| |
| COMMENT( "PERMANENTLY CLOSED" ); |
| |
| SELECT |
| T.DO_IT_NOW_ORELSE( RENDEZVOUS_OCCURRED ); |
| 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.KEEP_ALIVE ; -- THIS ALSO UPDATES THE NONLOCALS |
| |
| END; -- END OF BLOCK CONTAINING THE ENTRY CALL |
| |
| |
| ------------------------------------------------------------------- |
| |
| |
| -- BY NOW, THE TASK IS TERMINATED |
| |
| IF RENDEZVOUS_OCCURRED |
| THEN |
| FAILED( "RENDEZVOUS OCCURRED" ); |
| END IF; |
| |
| IF QUEUE_NOT_EMPTY |
| THEN |
| FAILED( "ENTRY QUEUE NOT EMPTY" ); |
| END IF; |
| |
| IF ELSE_BRANCH_TAKEN THEN |
| NULL ; |
| ELSE |
| FAILED( "RENDEZVOUS ATTEMPTED?" ); |
| END IF; |
| |
| RESULT; |
| |
| |
| END C97201G ; |