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) 2014-2019, 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 is the size 46 -- of either Integer or System.Address, and Initial_Value is 0 (null for 47 -- an access type). 48 49 -- Other types and initial values are supported, but will require 50 -- the use of locking and a level of indirection (meaning extra dynamic 51 -- memory allocation). 52 53 -- The maximum number of task attributes supported by this implementation 54 -- is determined by the constant System.Parameters.Max_Attribute_Count. 55 -- If you exceed this number, Storage_Error will be raised during the 56 -- elaboration of the instantiation of this package. 57 58 type Attribute_Handle is access all Attribute; 59 60 function Value 61 (T : Ada.Task_Identification.Task_Id := 62 Ada.Task_Identification.Current_Task) return Attribute; 63 -- Return the value of the corresponding attribute of T. Tasking_Error 64 -- is raised if T is terminated and Program_Error will be raised if T 65 -- is Null_Task_Id. 66 67 function Reference 68 (T : Ada.Task_Identification.Task_Id := 69 Ada.Task_Identification.Current_Task) return Attribute_Handle; 70 -- Return an access value that designates the corresponding attribute of 71 -- T. Tasking_Error is raised if T is terminated and Program_Error will be 72 -- raised if T is Null_Task_Id. 73 74 procedure Set_Value 75 (Val : Attribute; 76 T : Ada.Task_Identification.Task_Id := 77 Ada.Task_Identification.Current_Task); 78 -- Finalize the old value of the attribute of T and assign Val to that 79 -- attribute. Tasking_Error is raised if T is terminated and Program_Error 80 -- will be raised if T is Null_Task_Id. 81 82 procedure Reinitialize 83 (T : Ada.Task_Identification.Task_Id := 84 Ada.Task_Identification.Current_Task); 85 -- Same as Set_Value (Initial_Value, T). Tasking_Error is raised if T is 86 -- terminated and Program_Error will be raised if T is Null_Task_Id. 87 88private 89 pragma Inline (Value); 90 pragma Inline (Reference); 91 pragma Inline (Set_Value); 92 pragma Inline (Reinitialize); 93end Ada.Task_Attributes; 94