71 lines
3.8 KiB
Ada
71 lines
3.8 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package provides support for the body of Ada.Task_Attributes
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with Ada.Unchecked_Conversion;
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package System.Tasking.Task_Attributes is
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type Deallocator is access procedure (Ptr : Atomic_Address);
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type Attribute_Record is record
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Free : Deallocator;
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end record;
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-- The real type is declared in Ada.Task_Attributes body: Real_Attribute.
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-- As long as the first field is the deallocator we are good.
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type Attribute_Access is access all Attribute_Record;
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pragma No_Strict_Aliasing (Attribute_Access);
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function To_Attribute is new
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Ada.Unchecked_Conversion (Atomic_Address, Attribute_Access);
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function Next_Index (Require_Finalization : Boolean) return Integer;
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-- Return the next attribute index available. Require_Finalization is True
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-- if the attribute requires finalization and in particular its deallocator
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-- (Free field in Attribute_Record) should be called. Raise Storage_Error
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-- if no index is available.
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function Require_Finalization (Index : Integer) return Boolean;
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-- Return True if a given attribute index requires call to Free. This call
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-- is not protected against concurrent access, should only be called during
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-- finalization of the corresponding instantiation of Ada.Task_Attributes,
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-- or during finalization of a task.
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procedure Finalize (Index : Integer);
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-- Finalize given Index, possibly allowing future reuse
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private
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pragma Inline (Finalize);
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pragma Inline (Require_Finalization);
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end System.Tasking.Task_Attributes;
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