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-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with Ada.Exceptions; 33 34with System.Tasking; 35with System.Task_Primitives.Operations; 36 37package body Ada.Synchronous_Task_Control is 38 39 ---------------- 40 -- Initialize -- 41 ---------------- 42 43 procedure Initialize (S : in out Suspension_Object) is 44 begin 45 System.Task_Primitives.Operations.Initialize (S.SO); 46 end Initialize; 47 48 -------------- 49 -- Finalize -- 50 -------------- 51 52 procedure Finalize (S : in out Suspension_Object) is 53 begin 54 System.Task_Primitives.Operations.Finalize (S.SO); 55 end Finalize; 56 57 ------------------- 58 -- Current_State -- 59 ------------------- 60 61 function Current_State (S : Suspension_Object) return Boolean is 62 begin 63 return System.Task_Primitives.Operations.Current_State (S.SO); 64 end Current_State; 65 66 --------------- 67 -- Set_False -- 68 --------------- 69 70 procedure Set_False (S : in out Suspension_Object) is 71 begin 72 System.Task_Primitives.Operations.Set_False (S.SO); 73 end Set_False; 74 75 -------------- 76 -- Set_True -- 77 -------------- 78 79 procedure Set_True (S : in out Suspension_Object) is 80 begin 81 System.Task_Primitives.Operations.Set_True (S.SO); 82 end Set_True; 83 84 ------------------------ 85 -- Suspend_Until_True -- 86 ------------------------ 87 88 procedure Suspend_Until_True (S : in out Suspension_Object) is 89 begin 90 -- This is a potentially blocking (see ARM D.10, par. 10), so that 91 -- if pragma Detect_Blocking is active then Program_Error must be 92 -- raised if this operation is called from a protected action. 93 94 if System.Tasking.Detect_Blocking 95 and then System.Tasking.Self.Common.Protected_Action_Nesting > 0 96 then 97 Ada.Exceptions.Raise_Exception 98 (Program_Error'Identity, "potentially blocking operation"); 99 end if; 100 101 System.Task_Primitives.Operations.Suspend_Until_True (S.SO); 102 end Suspend_Until_True; 103 104end Ada.Synchronous_Task_Control; 105