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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . R E A L _ T I M E . T I M I N G _ E V E N T S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2005-2006, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- GNAT 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- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- 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 GNAT; see file COPYING. If not, write --
-- 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, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Finalization;
package Ada.Real_Time.Timing_Events is
type Timing_Event is tagged limited private;
type Timing_Event_Handler
is access protected procedure (Event : in out Timing_Event);
procedure Set_Handler
(Event : in out Timing_Event;
At_Time : Time;
Handler : Timing_Event_Handler);
procedure Set_Handler
(Event : in out Timing_Event;
In_Time : Time_Span;
Handler : Timing_Event_Handler);
function Current_Handler
(Event : Timing_Event) return Timing_Event_Handler;
procedure Cancel_Handler
(Event : in out Timing_Event;
Cancelled : out Boolean);
function Time_Of_Event (Event : Timing_Event) return Time;
private
type Timing_Event is new Ada.Finalization.Limited_Controlled with record
Timeout : Time := Time_First;
-- The time at which the user's handler should be invoked when the
-- event is "set" (i.e., when Handler is not null).
Handler : Timing_Event_Handler;
-- An access value designating the protected procedure to be invoked
-- at the Timeout time in the future. When this value is null the event
-- is said to be "cleared" and no timeout is processed.
end record;
overriding procedure Finalize (This : in out Timing_Event);
-- Finalization procedure is required to satisfy (RM D.15 (19/2)), which
-- says that the object must be cleared on finalization.
end Ada.Real_Time.Timing_Events;
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