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) 1992-2015, 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 3, 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. --
22 -- As a special exception under Section 7 of GPL version 3, you are granted --
23 -- additional permissions described in the GCC Runtime Library Exception, --
24 -- version 3.1, as published by the Free Software Foundation. --
26 -- You should have received a copy of the GNU General Public License and --
27 -- a copy of the GCC Runtime Library Exception along with this program; --
28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
29 -- <http://www.gnu.org/licenses/>. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- Extensive contributions were provided by Ada Core Technologies Inc. --
34 ------------------------------------------------------------------------------
36 with System.Task_Primitives;
38 with Ada.Finalization;
39 with Ada.Task_Identification;
41 package Ada.Synchronous_Task_Control with
45 -- In accordance with Ada 2005 AI-362
47 type Suspension_Object is limited private with
48 Default_Initial_Condition;
50 procedure Set_True (S : in out Suspension_Object) with
52 Depends => (S => null,
55 procedure Set_False (S : in out Suspension_Object) with
57 Depends => (S => null,
60 function Current_State (S : Suspension_Object) return Boolean with
62 Global => Ada.Task_Identification.Tasking_State;
64 procedure Suspend_Until_True (S : in out Suspension_Object) with
66 Depends => (S => null,
70 pragma SPARK_Mode (Off);
72 procedure Initialize (S : in out Suspension_Object);
73 -- Initialization for Suspension_Object
75 procedure Finalize (S : in out Suspension_Object);
76 -- Finalization for Suspension_Object
78 type Suspension_Object is
79 new Ada.Finalization.Limited_Controlled with
81 SO : System.Task_Primitives.Suspension_Object;
82 -- Use low-level suspension objects so that the synchronization
83 -- functionality provided by this object can be achieved using
84 -- efficient operating system primitives.
87 pragma Inline (Set_True);
88 pragma Inline (Set_False);
89 pragma Inline (Current_State);
90 pragma Inline (Suspend_Until_True);
91 pragma Inline (Initialize);
92 pragma Inline (Finalize);
94 end Ada.Synchronous_Task_Control;