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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 ;