| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . T A S K I N G . T A S K _ A T T R I B U T E S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2014-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with System.Parameters; use System.Parameters; |
| with System.Tasking.Initialization; use System.Tasking.Initialization; |
| with System.Task_Primitives.Operations; |
| |
| package body System.Tasking.Task_Attributes is |
| |
| package STPO renames System.Task_Primitives.Operations; |
| |
| type Index_Info is record |
| Used : Boolean; |
| -- Used is True if a given index is used by an instantiation of |
| -- Ada.Task_Attributes, False otherwise. |
| |
| Require_Finalization : Boolean; |
| -- Require_Finalization is True if the attribute requires finalization |
| end record; |
| |
| Index_Array : array (1 .. Max_Attribute_Count) of Index_Info := |
| (others => (False, False)); |
| |
| -- Note that this package will use an efficient implementation with no |
| -- locks and no extra dynamic memory allocation if Attribute can fit in a |
| -- System.Address type and Initial_Value is 0 (or null for an access type). |
| |
| function Next_Index (Require_Finalization : Boolean) return Integer is |
| Self_Id : constant Task_Id := STPO.Self; |
| |
| begin |
| Task_Lock (Self_Id); |
| |
| for J in Index_Array'Range loop |
| if not Index_Array (J).Used then |
| Index_Array (J).Used := True; |
| Index_Array (J).Require_Finalization := Require_Finalization; |
| Task_Unlock (Self_Id); |
| return J; |
| end if; |
| end loop; |
| |
| Task_Unlock (Self_Id); |
| raise Storage_Error with "Out of task attributes"; |
| end Next_Index; |
| |
| -------------- |
| -- Finalize -- |
| -------------- |
| |
| procedure Finalize (Index : Integer) is |
| Self_Id : constant Task_Id := STPO.Self; |
| begin |
| pragma Assert (Index in Index_Array'Range); |
| Task_Lock (Self_Id); |
| Index_Array (Index).Used := False; |
| Task_Unlock (Self_Id); |
| end Finalize; |
| |
| -------------------------- |
| -- Require_Finalization -- |
| -------------------------- |
| |
| function Require_Finalization (Index : Integer) return Boolean is |
| begin |
| pragma Assert (Index in Index_Array'Range); |
| return Index_Array (Index).Require_Finalization; |
| end Require_Finalization; |
| |
| end System.Tasking.Task_Attributes; |
