1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L --
9 -- Copyright (C) 1992-1998 Free Software Foundation, Inc. --
11 -- This specification is derived from the Ada Reference Manual for use with --
12 -- GNAT. The copyright notice above, and the license provisions that follow --
13 -- apply solely to the contents of the part following the private keyword. --
15 -- GNAT is free software; you can redistribute it and/or modify it under --
16 -- terms of the GNU General Public License as published by the Free Soft- --
17 -- ware Foundation; either version 2, or (at your option) any later ver- --
18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
20 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
21 -- for more details. You should have received a copy of the GNU General --
22 -- Public License distributed with GNAT; see file COPYING. If not, write --
23 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
24 -- MA 02111-1307, USA. --
26 -- As a special exception, if other files instantiate generics from this --
27 -- unit, or you link this unit with other files to produce an executable, --
28 -- this unit does not by itself cause the resulting executable to be --
29 -- covered by the GNU General Public License. This exception does not --
30 -- however invalidate any other reasons why the executable file might be --
31 -- covered by the GNU Public License. --
33 -- GNAT was originally developed by the GNAT team at New York University. --
34 -- Extensive contributions were provided by Ada Core Technologies Inc. --
36 ------------------------------------------------------------------------------
40 package Ada.Synchronous_Task_Control is
42 type Suspension_Object is limited private;
44 procedure Set_True (S : in out Suspension_Object);
46 procedure Set_False (S : in out Suspension_Object);
48 function Current_State (S : Suspension_Object) return Boolean;
50 procedure Suspend_Until_True (S : in out Suspension_Object);
54 -- ??? Using a protected object is overkill; suspension could be
55 -- implemented more efficiently.
57 protected type Suspension_Object is
61 function Get_Open return Boolean;
64 pragma Priority (System.Any_Priority'Last);
66 Open : Boolean := False;
67 end Suspension_Object;
69 end Ada.Synchronous_Task_Control;