1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 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 -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2014, Free Software Foundation, Inc. -- 10-- -- 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. -- 14-- -- 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. -- 21-- -- 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. -- 25-- -- 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/>. -- 30-- -- 31-- GNAT was originally developed by the GNAT team at New York University. -- 32-- Extensive contributions were provided by Ada Core Technologies Inc. -- 33-- -- 34------------------------------------------------------------------------------ 35 36with System.Task_Primitives; 37 38with Ada.Finalization; 39with Ada.Task_Identification; 40 41package Ada.Synchronous_Task_Control with 42 SPARK_Mode 43is 44 pragma Preelaborate; 45 -- In accordance with Ada 2005 AI-362 46 47 type Suspension_Object is limited private; 48 49 procedure Set_True (S : in out Suspension_Object) with 50 Global => null, 51 Depends => (S => null, 52 null => S); 53 54 procedure Set_False (S : in out Suspension_Object) with 55 Global => null, 56 Depends => (S => null, 57 null => S); 58 59 function Current_State (S : Suspension_Object) return Boolean with 60 Volatile_Function, 61 Global => Ada.Task_Identification.Tasking_State; 62 63 procedure Suspend_Until_True (S : in out Suspension_Object) with 64 Global => null, 65 Depends => (S => null, 66 null => S); 67 68private 69 pragma SPARK_Mode (Off); 70 71 procedure Initialize (S : in out Suspension_Object); 72 -- Initialization for Suspension_Object 73 74 procedure Finalize (S : in out Suspension_Object); 75 -- Finalization for Suspension_Object 76 77 type Suspension_Object is 78 new Ada.Finalization.Limited_Controlled with 79 record 80 SO : System.Task_Primitives.Suspension_Object; 81 -- Use low-level suspension objects so that the synchronization 82 -- functionality provided by this object can be achieved using 83 -- efficient operating system primitives. 84 end record; 85 86 pragma Inline (Set_True); 87 pragma Inline (Set_False); 88 pragma Inline (Current_State); 89 pragma Inline (Suspend_Until_True); 90 pragma Inline (Initialize); 91 pragma Inline (Finalize); 92 93end Ada.Synchronous_Task_Control; 94