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Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-tataat.ads')
-rw-r--r-- | gcc-4.8.3/gcc/ada/s-tataat.ads | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-tataat.ads b/gcc-4.8.3/gcc/ada/s-tataat.ads new file mode 100644 index 000000000..25cd2e5b3 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/s-tataat.ads @@ -0,0 +1,127 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1991-1994, Florida State University -- +-- Copyright (C) 1995-2010, AdaCore -- +-- -- +-- 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. -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides support for the body of Ada.Task_Attributes + +with Ada.Finalization; + +with System.Storage_Elements; + +package System.Tasking.Task_Attributes is + + type Attribute is new Integer; + -- A stand-in for the generic formal type of Ada.Task_Attributes + -- in the following declarations. + + type Node; + type Access_Node is access all Node; + -- This needs comments ??? + + function To_Access_Node is new Ada.Unchecked_Conversion + (Access_Address, Access_Node); + -- Used to fetch pointer to indirect attribute list. Declaration is in + -- spec to avoid any problems with aliasing assumptions. + + type Dummy_Wrapper; + type Access_Dummy_Wrapper is access all Dummy_Wrapper; + pragma No_Strict_Aliasing (Access_Dummy_Wrapper); + -- Needed to avoid possible incorrect aliasing situations from + -- instantiation of Unchecked_Conversion in body of Ada.Task_Attributes. + + for Access_Dummy_Wrapper'Storage_Size use 0; + -- Access_Dummy_Wrapper is a stand-in for the generic type Wrapper defined + -- in Ada.Task_Attributes. The real objects allocated are always + -- of type Wrapper, no Dummy_Wrapper objects are ever created. + + type Deallocator is access procedure (P : in out Access_Node); + -- Called to deallocate an Wrapper. P is a pointer to a Node within + + type Instance; + + type Access_Instance is access all Instance; + + type Instance is new Ada.Finalization.Limited_Controlled with record + Deallocate : Deallocator; + Initial_Value : aliased System.Storage_Elements.Integer_Address; + + Index : Direct_Index; + -- The index of the TCB location used by this instantiation, if it is + -- stored in the TCB, otherwise zero. + + Next : Access_Instance; + -- Next instance in All_Attributes list + end record; + + procedure Finalize (X : in out Instance); + + type Node is record + Wrapper : Access_Dummy_Wrapper; + Instance : Access_Instance; + Next : Access_Node; + end record; + + -- The following type is a stand-in for the actual wrapper type, which is + -- different for each instantiation of Ada.Task_Attributes. + + type Dummy_Wrapper is record + Dummy_Node : aliased Node; + + Value : aliased Attribute; + -- The generic formal type, may be controlled + end record; + + for Dummy_Wrapper'Alignment use Standard'Maximum_Alignment; + -- A number of unchecked conversions involving Dummy_Wrapper_Access + -- sources are performed in other units (e.g. Ada.Task_Attributes). + -- Ensure that the designated object is always strictly enough aligned. + + In_Use : Direct_Index_Vector := 0; + -- Set True for direct indexes that are already used (True??? type???) + + All_Attributes : Access_Instance; + -- A linked list of all indirectly access attributes, which includes all + -- those that require finalization. + + procedure Initialize_Attributes (T : Task_Id); + -- Initialize all attributes created via Ada.Task_Attributes for T. This + -- must be called by the creator of the task, inside Create_Task, via + -- soft-link Initialize_Attributes_Link. On entry, abort must be deferred + -- and the caller must hold no locks + + procedure Finalize_Attributes (T : Task_Id); + -- Finalize all attributes created via Ada.Task_Attributes for T. + -- This is to be called by the task after it is marked as terminated + -- (and before it actually dies), inside Vulnerable_Free_Task, via the + -- soft-link Finalize_Attributes_Link. On entry, abort must be deferred + -- and T.L must be write-locked. + +end System.Tasking.Task_Attributes; |