------------------------------------------------------------------------------
-- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . T A S K I N G . A S Y N C _ D E L A Y S --
-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 1998-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1998-2005 Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
--- GNARL was developed by the GNARL team at Florida State University. It is --
--- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
--- State University (http://www.gnat.com). --
+-- GNARL was developed by the GNARL team at Florida State University. --
+-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
------------------------------------------------------------------------------
--- This package contains the procedures to implements timeouts (delays)
--- for asynchronous select statements.
+-- This package contains the procedures to implements timeouts (delays) for
+-- asynchronous select statements.
-- Note: the compiler generates direct calls to this interface, via Rtsfind.
-- Any changes to this interface may require corresponding compiler changes.
(T : in Duration;
D : Delay_Block_Access) return Boolean;
-- Enqueue the specified relative delay. Returns True if the delay has
- -- been enqueued, False if it has already expired.
- -- If the delay has been enqueued, abortion is deferred.
+ -- been enqueued, False if it has already expired. If the delay has been
+ -- enqueued, abort is deferred.
procedure Cancel_Async_Delay (D : Delay_Block_Access);
-- Cancel the specified asynchronous delay
private
type Delay_Block is record
- Self_Id : Task_ID;
+ Self_Id : Task_Id;
-- ID of the calling task
- Level : ATC_Level_Base;
+ Level : ATC_Level_Base;
-- Normally Level is the ATC nesting level of the
-- async. select statement to which this delay belongs, but
-- after a call has been dequeued we set it to
Resume_Time : Duration;
-- The absolute wake up time, represented as Duration
- Timed_Out : Boolean := False;
+ Timed_Out : Boolean := False;
-- Set to true if the delay has timed out
- Succ, Pred : Delay_Block_Access;
+ Succ, Pred : Delay_Block_Access;
-- A double linked list
end record;
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