1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- A D A . T A S K _ A T T R I B U T E S -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 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 Ada.Task_Identification; 37 38generic 39 type Attribute is private; 40 Initial_Value : Attribute; 41 42package Ada.Task_Attributes is 43 44 -- Note that this package will use an efficient implementation with no 45 -- locks and no extra dynamic memory allocation if Attribute can fit in a 46 -- System.Address type, and Initial_Value is 0 (null for an access type). 47 48 -- Other types and initial values are supported, but will require 49 -- the use of locking and a level of indirection (meaning extra dynamic 50 -- memory allocation). 51 52 -- The maximum number of task attributes supported by this implementation 53 -- is determined by the constant System.Parameters.Max_Attribute_Count. 54 -- If you exceed this number, Storage_Error will be raised during the 55 -- elaboration of the instantiation of this package. 56 57 type Attribute_Handle is access all Attribute; 58 59 function Value 60 (T : Ada.Task_Identification.Task_Id := 61 Ada.Task_Identification.Current_Task) return Attribute; 62 -- Return the value of the corresponding attribute of T. Tasking_Error 63 -- is raised if T is terminated and Program_Error will be raised if T 64 -- is Null_Task_Id. 65 66 function Reference 67 (T : Ada.Task_Identification.Task_Id := 68 Ada.Task_Identification.Current_Task) return Attribute_Handle; 69 -- Return an access value that designates the corresponding attribute of 70 -- T. Tasking_Error is raised if T is terminated and Program_Error will be 71 -- raised if T is Null_Task_Id. 72 73 procedure Set_Value 74 (Val : Attribute; 75 T : Ada.Task_Identification.Task_Id := 76 Ada.Task_Identification.Current_Task); 77 -- Finalize the old value of the attribute of T and assign Val to that 78 -- attribute. Tasking_Error is raised if T is terminated and Program_Error 79 -- will be raised if T is Null_Task_Id. 80 81 procedure Reinitialize 82 (T : Ada.Task_Identification.Task_Id := 83 Ada.Task_Identification.Current_Task); 84 -- Same as Set_Value (Initial_Value, T). Tasking_Error is raised if T is 85 -- terminated and Program_Error will be raised if T is Null_Task_Id. 86 87private 88 pragma Inline (Value); 89 pragma Inline (Reference); 90 pragma Inline (Set_Value); 91 pragma Inline (Reinitialize); 92end Ada.Task_Attributes; 93