blob: 590f7707d5053c817dfc9f02c1a6242ce015d939 [file] [log] [blame]
-- --
-- --
-- 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 --
-- --
-- S p e c --
-- --
-- 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 --
-- --
-- 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 --
-- <>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- --
-- This package provides support for the body of Ada.Task_Attributes
with Ada.Unchecked_Conversion;
package System.Tasking.Task_Attributes is
type Deallocator is access procedure (Ptr : Atomic_Address);
pragma Favor_Top_Level (Deallocator);
type Attribute_Record is record
Free : Deallocator;
end record;
-- The real type is declared in Ada.Task_Attributes body: Real_Attribute.
-- As long as the first field is the deallocator we are good.
type Attribute_Access is access all Attribute_Record;
pragma No_Strict_Aliasing (Attribute_Access);
function To_Attribute is new
Ada.Unchecked_Conversion (Atomic_Address, Attribute_Access);
function Next_Index (Require_Finalization : Boolean) return Integer;
-- Return the next attribute index available. Require_Finalization is True
-- if the attribute requires finalization and in particular its deallocator
-- (Free field in Attribute_Record) should be called. Raise Storage_Error
-- if no index is available.
function Require_Finalization (Index : Integer) return Boolean;
-- Return True if a given attribute index requires call to Free. This call
-- is not protected against concurrent access, should only be called during
-- finalization of the corresponding instantiation of Ada.Task_Attributes,
-- or during finalization of a task.
procedure Finalize (Index : Integer);
-- Finalize given Index, possibly allowing future reuse
pragma Inline (Finalize);
pragma Inline (Require_Finalization);
end System.Tasking.Task_Attributes;