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-- F954A00.A
--
--
-- 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.
--*
--
-- OBJECTIVE:
-- This file contains foundation code for tests covering the requeue
-- statement.
--
-- TEST DESCRIPTION:
-- See prologues of specific tests.
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
package F954A00 is -- Printer device abstraction.
-- Model a printer device driver as a protected type. A printer remains
-- unavailable while data is printing. The printer generates an interrupt
-- when printing is complete, after which the printer is again made
-- available.
type Printers_Info is tagged record
Some_Info : Integer;
end record;
--==============================================--
protected type Printers is -- Device driver for printer.
procedure Start_Printing (File_Name : String); -- Begin printing on
-- printer.
procedure Handle_Interrupt; -- Handle interrupt from
-- printer.
entry Done_Printing; -- Wait until printer is
-- done.
function Available return Boolean; -- Return value of Ready.
function Is_Done return Boolean; -- Return value of Done.
private
Ready : Boolean := True; -- Entry barrier.
Done : Boolean := True; -- Testing flag.
end Printers;
--==============================================--
Number_Of_Printers : constant := 2;
type Printer_ID is range 1 .. Number_Of_Printers;
type Printer_Array is array (Printer_ID) of Printers;
type Info_Array is array (Printer_ID) of Printers_Info;
Printer : Printer_Array;
Printer_Info : constant Info_Array := ( (Some_Info => 1),
(Some_Info => 2) );
end F954A00;
--==================================================================--
package body F954A00 is -- Printer server abstraction.
protected body Printers is
procedure Start_Printing (File_Name : String) is
begin
Ready := False; -- Block other requests
Done := False; -- for this printer
-- Send data to the printer... -- and begin printing.
end Start_Printing;
-- Set the "not ready" one-shot
entry Done_Printing when Ready is -- Callers wait here
begin -- until printing is
Done := True; -- done (signaled by a
end Done_Printing; -- printer interrupt).
procedure Handle_Interrupt is -- Called when the
begin -- printer interrupts,
Ready := True; -- indicating that
end Handle_Interrupt; -- printing is done.
function Available return Boolean is -- Artifice for test
begin -- purposes: checks
return (Ready); -- whether printer is
end Available; -- still printing.
function Is_Done return Boolean is -- Artifice for test
begin -- purposes: checks
return (Done); -- whether Done_Printing
end Is_Done; -- entry was executed.
end Printers;
end F954A00;
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